Package 'rayvertex' reference manual

Title:	3D Software Rasterizer
Description:	Rasterize images using a 3D software renderer. 3D scenes are created either by importing external files, building scenes out of the included objects, or by constructing meshes manually. Supports point and directional lights, anti-aliased lines, shadow mapping, transparent objects, translucent objects, multiple materials types, reflection, refraction, environment maps, multicore rendering, bloom, tone-mapping, and screen-space ambient occlusion.
Authors:	Tyler Morgan-Wall [aut, cph, cre] , Syoyo Fujita [ctb, cph], Vilya Harvey [ctb, cph], G-Truc Creation [ctb, cph], Sean Barrett [ctb, cph]
Maintainer:	Tyler Morgan-Wall <[email protected]>
License:	GPL (>= 3)
Version:	0.11.4
Built:	2024-08-21 03:45:18 UTC
Source:	https://github.com/tylermorganwall/rayvertex

Add light

Description

Add light

Usage

add_light(lights, light)
add_light(lights, light)

Arguments

`lights`	Current light scene.
`light`	New light to add.

Value

A matrix representing the light information.

Examples

if(run_documentation()) {
#Add a light to scene (manually specify the light automatically added to the Cornell Box
lights = point_light(position=c(555/2,450,555/2),
                    falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights)
 
#Add directional lights and a point light
lights_d = add_light(lights, directional_light(direction=c(1,1.5,-1), intensity=0.2)) |>
 add_light(directional_light(direction=c(-1,1.5,-1),color="red", intensity=0.2)) |>
 add_light(point_light(position=c(555/2,50,555/2), color="blue", intensity=0.3,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
}
if(run_documentation()) {
#Add a light to scene (manually specify the light automatically added to the Cornell Box
lights = point_light(position=c(555/2,450,555/2),
                    falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights)
 
#Add directional lights and a point light
lights_d = add_light(lights, directional_light(direction=c(1,1.5,-1), intensity=0.2)) |>
 add_light(directional_light(direction=c(-1,1.5,-1),color="red", intensity=0.2)) |>
 add_light(point_light(position=c(555/2,50,555/2), color="blue", intensity=0.3,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
}

Add Line

Description

Add Line

Usage

add_lines(lines, line)
add_lines(lines, line)

Arguments

`lines`	Existing lines or empty (0-row) matrix.
`line`	Line to add, generated with `generate_line()`

Value

New line matrix.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
  
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
  
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}

Applies a planar UV mapping to a mesh based on a given direction and set of U/V vectors. If full_mesh_bbox is true, the UV mapping is scaled based on the bounding box of the entire mesh. If false, each shape's bounding box is used. One of direction/u/v must be NULL and will be calculated from the others.

Usage

add_plane_uv_mesh(
  mesh,
  direction = c(0, 1, 0),
  u = NULL,
  v = NULL,
  override_existing = FALSE,
  full_mesh_bbox = TRUE
)
add_plane_uv_mesh(
  mesh,
  direction = c(0, 1, 0),
  u = NULL,
  v = NULL,
  override_existing = FALSE,
  full_mesh_bbox = TRUE
)

Arguments

`mesh`	The mesh to which the UV mapping will be applied.
`direction`	Default `c(0, 1, 0)`. A vector specifying the direction for UV mapping. If not specified and `u`/`v` are both specified, this will be ignored.
`u`	Default `NULL`. A vector specifying the u direction.
`v`	Default `NULL`. A vector specifying the v direction.
`override_existing`	Default `FALSE`. Specifies whether existing UV coordinates should be overridden.
`full_mesh_bbox`	Default `TRUE`. Specifies whether the full mesh's bounding box is used for UV mapping.

Value

Modified mesh with added UV mapping.

Examples

if(run_documentation()) {
#Let's construct a mesh from the volcano dataset
#Build the vertex matrix
vertex_list = list()
counter = 1
for(i in 1:nrow(volcano)) {
  for(j in 1:ncol(volcano)) {
    vertex_list[[counter]] = matrix(c(j,volcano[i,j]/3,i), ncol=3)
    counter = counter + 1
  }
}
vertices = do.call(rbind,vertex_list)

#Build the index matrix
index_list = list()
counter = 0
for(i in 1:(nrow(volcano)-1)) {
  for(j in 1:(ncol(volcano)-1)) {
    index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                       counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1),
                                     nrow=2, ncol=3, byrow=TRUE)
    counter = counter + 1
  }
  counter = counter + 1
}
indices = do.call("rbind",index_list)

#Create a checkerboard image
create_checkerboard_texture = function(filename, n = 16) {
  old_par = par(no.readonly = TRUE)
  on.exit(par(old_par))
  plot.new()
  par(mar = c(0, 0, 0, 0))
  checkerboard = matrix(c(1, 0), nrow = n+1, ncol = n)
  png(filename, width = 800, height = 800)
  image(1:(n+1), 1:n, checkerboard, col = c("dodgerblue", "red"),
        axes = FALSE, xlab = "", ylab = "")
  dev.off()
}
checkerboard_file = tempfile(fileext = ".png")
create_checkerboard_texture(checkerboard_file)
rayimage::plot_image(checkerboard_file)
}

if(run_documentation()) {
#Construct the mesh
volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                           material = material_list(type="phong", diffuse="darkred",
                                                    ambient = "darkred", ambient_intensity=0.2))


#Set the direction so that the checkerboard will be mapped to the surface like a carpet
uv = add_plane_uv_mesh(volc_mesh, direction=c(0,200,0), u = c(1,0,0))
uv = set_material(uv, texture_location = checkerboard_file,
                  ambient = "white", ambient_intensity=0.1)
#Rasterize the scene
rasterize_scene(center_mesh(uv), lookfrom=c(200,200,200),fov=0,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                  add_light(directional_light(c(1,1,-1))),ortho_dimensions=c(120,120))
}

if(run_documentation()) {
#Set the direction so that the checkerboard will be mapped directly at the camera
uv = add_plane_uv_mesh(volc_mesh, direction=c(200,200,200), v = c(-1,1,-1))
uv = set_material(uv, texture_location = checkerboard_file,
                  ambient = "white", ambient_intensity=0.1)
#Rasterize the scene
rasterize_scene(center_mesh(uv), lookfrom=c(200,200,200),fov=0,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                add_light(directional_light(c(1,1,-1))), ortho_dimensions=c(120,120))
}
if(run_documentation()) {
#Let's construct a mesh from the volcano dataset
#Build the vertex matrix
vertex_list = list()
counter = 1
for(i in 1:nrow(volcano)) {
  for(j in 1:ncol(volcano)) {
    vertex_list[[counter]] = matrix(c(j,volcano[i,j]/3,i), ncol=3)
    counter = counter + 1
  }
}
vertices = do.call(rbind,vertex_list)

#Build the index matrix
index_list = list()
counter = 0
for(i in 1:(nrow(volcano)-1)) {
  for(j in 1:(ncol(volcano)-1)) {
    index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                       counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1),
                                     nrow=2, ncol=3, byrow=TRUE)
    counter = counter + 1
  }
  counter = counter + 1
}
indices = do.call("rbind",index_list)

#Create a checkerboard image
create_checkerboard_texture = function(filename, n = 16) {
  old_par = par(no.readonly = TRUE)
  on.exit(par(old_par))
  plot.new()
  par(mar = c(0, 0, 0, 0))
  checkerboard = matrix(c(1, 0), nrow = n+1, ncol = n)
  png(filename, width = 800, height = 800)
  image(1:(n+1), 1:n, checkerboard, col = c("dodgerblue", "red"),
        axes = FALSE, xlab = "", ylab = "")
  dev.off()
}
checkerboard_file = tempfile(fileext = ".png")
create_checkerboard_texture(checkerboard_file)
rayimage::plot_image(checkerboard_file)
}

if(run_documentation()) {
#Construct the mesh
volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                           material = material_list(type="phong", diffuse="darkred",
                                                    ambient = "darkred", ambient_intensity=0.2))


#Set the direction so that the checkerboard will be mapped to the surface like a carpet
uv = add_plane_uv_mesh(volc_mesh, direction=c(0,200,0), u = c(1,0,0))
uv = set_material(uv, texture_location = checkerboard_file,
                  ambient = "white", ambient_intensity=0.1)
#Rasterize the scene
rasterize_scene(center_mesh(uv), lookfrom=c(200,200,200),fov=0,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                  add_light(directional_light(c(1,1,-1))),ortho_dimensions=c(120,120))
}

if(run_documentation()) {
#Set the direction so that the checkerboard will be mapped directly at the camera
uv = add_plane_uv_mesh(volc_mesh, direction=c(200,200,200), v = c(-1,1,-1))
uv = set_material(uv, texture_location = checkerboard_file,
                  ambient = "white", ambient_intensity=0.1)
#Rasterize the scene
rasterize_scene(center_mesh(uv), lookfrom=c(200,200,200),fov=0,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                add_light(directional_light(c(1,1,-1))), ortho_dimensions=c(120,120))
}

Add Shape

Description

Add shape to the scene.

Usage

add_shape(scene, shape = NULL)
add_shape(scene, shape = NULL)

Arguments

`scene`	The scene to add the shape.
`shape`	The mesh to add to the scene.

Value

Scene with shape added.

Examples

if(run_documentation()) {
#Generate several spheres in the cornell box
scene = generate_cornell_mesh()
set.seed(1)

for(i in 1:30) {
 col = hsv(runif(1))
 scene = add_shape(scene, sphere_mesh(position=runif(3)*400+155/2,
                                      material=material_list(diffuse=col, type="phong",
                                                             ambient=col,ambient_intensity=0.2), 
                                      radius=30))
}
rasterize_scene(scene, light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
#Generate several spheres in the cornell box
scene = generate_cornell_mesh()
set.seed(1)

for(i in 1:30) {
 col = hsv(runif(1))
 scene = add_shape(scene, sphere_mesh(position=runif(3)*400+155/2,
                                      material=material_list(diffuse=col, type="phong",
                                                             ambient=col,ambient_intensity=0.2), 
                                      radius=30))
}
rasterize_scene(scene, light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Add Sphere UV Mapping to Mesh

Description

Applies a planar UV mapping to a mesh based on a spherical direction from the origin.

Usage

add_sphere_uv_mesh(mesh, origin = c(0, 0, 0), override_existing = FALSE)
add_sphere_uv_mesh(mesh, origin = c(0, 0, 0), override_existing = FALSE)

Arguments

`mesh`	The mesh to which the UV mapping will be applied.
`origin`	Default `c(0, 0, 0)`. A vector specifying the origin to apply spherical UV coordinates.
`override_existing`	Default `FALSE`. Specifies whether existing UV coordinates should be overridden.

Value

Modified mesh with added UV mapping.

Examples

if(run_documentation()) {
#Let's construct a mesh from the volcano dataset

}
if(run_documentation()) {
#Let's construct a mesh from the volcano dataset

}

Arrow 3D Model

Description

Arrow 3D Model

Usage

arrow_mesh(
  start = c(0, 0, 0),
  end = c(0, 1, 0),
  radius_top = 0.5,
  radius_tail = 0.25,
  tail_proportion = 0.5,
  direction = NA,
  from_center = TRUE,
  material = material_list()
)
arrow_mesh(
  start = c(0, 0, 0),
  end = c(0, 1, 0),
  radius_top = 0.5,
  radius_tail = 0.25,
  tail_proportion = 0.5,
  direction = NA,
  from_center = TRUE,
  material = material_list()
)

Arguments

`start`	Default `c(0, 0, 0)`. Base of the arrow, specifying `x`, `y`, `z`.
`end`	Default `c(0, 1, 0)`. Tip of the arrow, specifying `x`, `y`, `z`.
`radius_top`	Default `0.5`. Radius of the top of the arrow.
`radius_tail`	Default `0.2`. Radius of the tail of the arrow.
`tail_proportion`	Default `0.5`. Proportion of the arrow that is the tail.
`direction`	Default `NA`. Alternative to `start` and `end`, specify the direction (via a length-3 vector) of the arrow. Arrow will be centered at `start`, and the length will be determined by the magnitude of the direction vector.
`from_center`	Default `TRUE`. If orientation specified via `direction`, setting this argument to `FALSE` will make `start` specify the bottom of the cone, instead of the middle.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate an arrow
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius_tail=50,
                       radius_top = 100,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue arrow with a wide tail
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius_tail=100,
                       radius_top = 150,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
  }
if(run_documentation()) {
#Generate a long, thin arrow and change the proportions
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 400, 555/2), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Change the start and end points
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(500, 20, 555/2), end = c(50, 500, 555/2), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="dodgerblue"))) |>
  add_shape(arrow_mesh(start = c(500, 500, 500), end = c(50, 50, 50), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="red"))) |>
  add_shape(arrow_mesh(start = c(555/2, 50, 500), end = c(555/2, 50, 50), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="green"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate an arrow
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius_tail=50,
                       radius_top = 100,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue arrow with a wide tail
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius_tail=100,
                       radius_top = 150,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
  }
if(run_documentation()) {
#Generate a long, thin arrow and change the proportions
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 400, 555/2), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Change the start and end points
generate_cornell_mesh() |>
  add_shape(arrow_mesh(start = c(500, 20, 555/2), end = c(50, 500, 555/2), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="dodgerblue"))) |>
  add_shape(arrow_mesh(start = c(500, 500, 500), end = c(50, 50, 50), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="red"))) |>
  add_shape(arrow_mesh(start = c(555/2, 50, 500), end = c(555/2, 50, 50), radius_top=30,
                       radius_tail = 10, tail_proportion = 0.8,
                      material = material_list(diffuse="green"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}

Center Mesh

Description

Centers the mesh at the origin.

Usage

center_mesh(mesh)
center_mesh(mesh)

Arguments

mesh

The mesh object.

Value

Centered mesh

Examples

if(run_documentation()) {
#Center the Cornell box and the R OBJ at the origin
center_mesh(generate_cornell_mesh()) |>
  add_shape(center_mesh(obj_mesh(r_obj(),scale=100,angle=c(0,180,0)))) |>
  rasterize_scene(lookfrom=c(0,0,-1100),fov=40,lookat=c(0,0,0),
                  light_info = directional_light(c(0.4,0.4,-1)) |>
      add_light(point_light(c(0,450,0),  falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)))
}
if(run_documentation()) {
#Center the Cornell box and the R OBJ at the origin
center_mesh(generate_cornell_mesh()) |>
  add_shape(center_mesh(obj_mesh(r_obj(),scale=100,angle=c(0,180,0)))) |>
  rasterize_scene(lookfrom=c(0,0,-1100),fov=40,lookat=c(0,0,0),
                  light_info = directional_light(c(0.4,0.4,-1)) |>
      add_light(point_light(c(0,450,0),  falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)))
}

Change Material

Description

Change individual material properties, leaving others alone.

Usage

change_material(
  mesh,
  id = NULL,
  sub_id = 1,
  diffuse = NULL,
  ambient = NULL,
  specular = NULL,
  transmittance = NULL,
  emission = NULL,
  shininess = NULL,
  ior = NULL,
  dissolve = NULL,
  illum = NULL,
  texture_location = NULL,
  normal_texture_location = NULL,
  bump_texture_location = NULL,
  specular_texture_location = NULL,
  ambient_texture_location = NULL,
  emissive_texture_location = NULL,
  diffuse_intensity = NULL,
  bump_intensity = NULL,
  specular_intensity = NULL,
  emission_intensity = NULL,
  ambient_intensity = NULL,
  culling = NULL,
  type = NULL,
  translucent = NULL,
  toon_levels = NULL,
  toon_outline_width = NULL,
  toon_outline_color = NULL,
  reflection_intensity = NULL,
  reflection_sharpness = NULL,
  two_sided = NULL
)
change_material(
  mesh,
  id = NULL,
  sub_id = 1,
  diffuse = NULL,
  ambient = NULL,
  specular = NULL,
  transmittance = NULL,
  emission = NULL,
  shininess = NULL,
  ior = NULL,
  dissolve = NULL,
  illum = NULL,
  texture_location = NULL,
  normal_texture_location = NULL,
  bump_texture_location = NULL,
  specular_texture_location = NULL,
  ambient_texture_location = NULL,
  emissive_texture_location = NULL,
  diffuse_intensity = NULL,
  bump_intensity = NULL,
  specular_intensity = NULL,
  emission_intensity = NULL,
  ambient_intensity = NULL,
  culling = NULL,
  type = NULL,
  translucent = NULL,
  toon_levels = NULL,
  toon_outline_width = NULL,
  toon_outline_color = NULL,
  reflection_intensity = NULL,
  reflection_sharpness = NULL,
  two_sided = NULL
)

Arguments

`mesh`	Mesh to change.
`id`	Default `NULL`. Either a number specifying the material to change, or a character vector matching the material name.
`sub_id`	Default `1`. A number specifying which material to change (within an id).
`diffuse`	Default `NULL`. The diffuse color.
`ambient`	Default `NULL`. The ambient color.
`specular`	Default `NULL`. The specular color.
`transmittance`	Default `NULL`. The transmittance
`emission`	Default `NULL`. The emissive color.
`shininess`	Default `NULL`. The shininess exponent.
`ior`	Default `NULL`. The index of refraction. If this is not equal to `1.0`, the material will be refractive.
`dissolve`	Default `NULL`. The transparency.
`illum`	Default `NULL`. The illumination.
`texture_location`	Default `NULL`. The diffuse texture location.
`normal_texture_location`	Default `NULL`. The normal texture location.
`bump_texture_location`	Default `NULL`. The bump texture location.
`specular_texture_location`	Default `NULL`. The specular texture location.
`ambient_texture_location`	Default `NULL`. The ambient texture location.
`emissive_texture_location`	Default `NULL`. The emissive texture location.
`diffuse_intensity`	Default `NULL`. The diffuse intensity.
`bump_intensity`	Default `NULL`. The bump intensity.
`specular_intensity`	Default `NULL`. The specular intensity.
`emission_intensity`	Default `NULL`. The emission intensity.
`ambient_intensity`	Default `NULL`. The ambient intensity.
`culling`	Default `NULL`. The culling type. Options are `back`, `front`, and `none`.
`type`	Default `NULL`. The shader type. Options include `diffuse`,`phong`,`vertex`, and `color`.
`translucent`	Default `NULL`. Whether light should transmit through a semi-transparent material.
`toon_levels`	Default `NULL`. Number of color breaks in the toon shader.
`toon_outline_width`	Default `NULL`. Expansion term for model to specify toon outline width. Note: setting this property via this function currently does not generate outlines. Specify it during object creation.
`toon_outline_color`	Default `NULL`. Toon outline color.Note: setting this property via this function currently does not color outlines. Specify it during object creation.
`reflection_intensity`	Default `NULL`. Intensity of the reflection of the environment map, if present. This will be ignored if the material is refractive.
`reflection_sharpness`	Default `NULL`. Sharpness of the reflection, where lower values have blurrier reflections. Must be greater than zero and less than one.
`two_sided`	Default `NULL`. Whether diffuse materials should be two sided (normal is taken as the absolute value of the dot product of the light direction and the normal).

Value

Shape with new material settings

Examples

if(run_documentation()) {
p_sphere = sphere_mesh(position=c(555/2,555/2,555/2), 
                      radius=40,material=material_list(diffuse="purple"))
generate_cornell_mesh() |>
 add_shape(translate_mesh(p_sphere,c(0,-100,0))) |>
 add_shape(change_material(translate_mesh(p_sphere,c(200,-100,0)),diffuse="red")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(100,-100,0)),dissolve=0.5)) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-100,-100,0)),type="phong")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-200,-100,0)),type="phong",shininess=30)) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}  

if(run_documentation()) {
#Change several shapes at once
p_sphere |>
 add_shape(change_material(translate_mesh(p_sphere,c(200,0,0)),diffuse="red")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(100,0,0)),dissolve=0.5)) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-100,0,0)),type="phong")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-200,0,0)),type="phong",shininess=30)) |>
 change_material(diffuse = "red") |> 
 add_shape(generate_cornell_mesh()) |> 
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
p_sphere = sphere_mesh(position=c(555/2,555/2,555/2), 
                      radius=40,material=material_list(diffuse="purple"))
generate_cornell_mesh() |>
 add_shape(translate_mesh(p_sphere,c(0,-100,0))) |>
 add_shape(change_material(translate_mesh(p_sphere,c(200,-100,0)),diffuse="red")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(100,-100,0)),dissolve=0.5)) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-100,-100,0)),type="phong")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-200,-100,0)),type="phong",shininess=30)) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}  

if(run_documentation()) {
#Change several shapes at once
p_sphere |>
 add_shape(change_material(translate_mesh(p_sphere,c(200,0,0)),diffuse="red")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(100,0,0)),dissolve=0.5)) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-100,0,0)),type="phong")) |>
 add_shape(change_material(translate_mesh(p_sphere,c(-200,0,0)),type="phong",shininess=30)) |>
 change_material(diffuse = "red") |> 
 add_shape(generate_cornell_mesh()) |> 
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Color Lines

Description

Color Lines

Usage

color_lines(lines, color = "white")
color_lines(lines, color = "white")

Arguments

`lines`	The line scene.
`color`	Default `white`. The color to convert the lines to.

Value

Colored line matrix.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
  
cube_outline |>
  color_lines(color="red") |>
  rasterize_lines()
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
  
cube_outline |>
  color_lines(color="red") |>
  rasterize_lines()
}

Cone 3D Model

Description

Cone 3D Model

Usage

cone_mesh(
  start = c(0, 0, 0),
  end = c(0, 1, 0),
  radius = 0.5,
  direction = NA,
  from_center = FALSE,
  material = material_list()
)
cone_mesh(
  start = c(0, 0, 0),
  end = c(0, 1, 0),
  radius = 0.5,
  direction = NA,
  from_center = FALSE,
  material = material_list()
)

Arguments

`start`	Default `c(0, 0, 0)`. Base of the cone, specifying `x`, `y`, `z`.
`end`	Default `c(0, 1, 0)`. Tip of the cone, specifying `x`, `y`, `z`.
`radius`	Default `1`. Radius of the bottom of the cone.
`direction`	Default `NA`. Alternative to `start` and `end`, specify the direction (via a length-3 vector) of the cone. Cone will be centered at `start`, and the length will be determined by the magnitude of the direction vector.
`from_center`	Default `TRUE`. If orientation specified via `direction`, setting this argument to `FALSE` will make `start` specify the bottom of the cone, instead of the middle.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a cone
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2),
                      radius = 100)) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue cone with a wide base
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius=200,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a long, thin cone
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 400, 555/2), radius=50,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a cone
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2),
                      radius = 100)) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue cone with a wide base
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 300, 555/2), radius=200,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a long, thin cone
generate_cornell_mesh() |>
  add_shape(cone_mesh(start = c(555/2, 20, 555/2), end = c(555/2, 400, 555/2), radius=50,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}

Manually construct a mesh

Description

Manually construct a mesh

Usage

construct_mesh(
  vertices,
  indices,
  normals = NULL,
  norm_indices = NULL,
  texcoords = NULL,
  tex_indices = NULL,
  material = material_list()
)
construct_mesh(
  vertices,
  indices,
  normals = NULL,
  norm_indices = NULL,
  texcoords = NULL,
  tex_indices = NULL,
  material = material_list()
)

Arguments

`vertices`	Nx3 matrix of vertex coordinates..
`indices`	Nx3 integer matrix, where each row defines a triangle using the vertices defined in `vertices`.
`normals`	Default `NULL`. Nx3 matrix of normals.
`norm_indices`	Nx3 integer matrix, where each row defines the normal for a vertex using the normals defined in `normals` for the corresponding triangle in `indices`. Required to be the same number of rows as `indices`.
`texcoords`	Default `NULL`. Nx2 matrix of texture coordinates.
`tex_indices`	Nx3 integer matrix, where each row defines the texture coordinates for a triangle using the tex coords defined in `texcoors` for the corresponding triangle in `indices`. Required to be the same number of rows as `indices`.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List containing mesh info.

Examples

if(run_documentation()) {
#Let's construct a mesh from the volcano dataset
#Build the vertex matrix
vertex_list = list()
counter = 1
for(i in 1:nrow(volcano)) {
  for(j in 1:ncol(volcano)) {
    vertex_list[[counter]] = matrix(c(j,volcano[i,j],i), ncol=3)
    counter = counter + 1
  }
}
vertices = do.call(rbind,vertex_list)

#Build the index matrix
index_list = list()
counter = 0
for(i in 1:(nrow(volcano)-1)) {
  for(j in 1:(ncol(volcano)-1)) {
    index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                       counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1), 
                                     nrow=2, ncol=3, byrow=TRUE)
    counter = counter + 1
  }
  counter = counter + 1
}
indices = do.call(rbind,index_list)

#Construct the mesh
volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                           material = material_list(type="phong", diffuse="darkred", 
                                                    ambient = "darkred", ambient_intensity=0.2))

#Rasterize the scene
rasterize_scene(volc_mesh, lookfrom=c(-50,230,100),fov=60,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                  add_light(directional_light(c(1,1,-1))))
}
if(run_documentation()) {
#Let's construct a mesh from the volcano dataset
#Build the vertex matrix
vertex_list = list()
counter = 1
for(i in 1:nrow(volcano)) {
  for(j in 1:ncol(volcano)) {
    vertex_list[[counter]] = matrix(c(j,volcano[i,j],i), ncol=3)
    counter = counter + 1
  }
}
vertices = do.call(rbind,vertex_list)

#Build the index matrix
index_list = list()
counter = 0
for(i in 1:(nrow(volcano)-1)) {
  for(j in 1:(ncol(volcano)-1)) {
    index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                       counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1), 
                                     nrow=2, ncol=3, byrow=TRUE)
    counter = counter + 1
  }
  counter = counter + 1
}
indices = do.call(rbind,index_list)

#Construct the mesh
volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                           material = material_list(type="phong", diffuse="darkred", 
                                                    ambient = "darkred", ambient_intensity=0.2))

#Rasterize the scene
rasterize_scene(volc_mesh, lookfrom=c(-50,230,100),fov=60,width=1200,height=1200,
                light_info = directional_light(c(0,1,1)) |>
                  add_light(directional_light(c(1,1,-1))))
}

Cube 3D Model

Description

3D obj model of the letter R

Usage

cube_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
cube_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a cube
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), scale = 100)) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue rotated cube 
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), scale = 100, angle=c(0,45,0),
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a scaled, blue rotated cube 
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), angle=c(0,45,0),
                      scale = c(2,0.5,0.8)*100,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a cube
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), scale = 100)) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a blue rotated cube 
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), scale = 100, angle=c(0,45,0),
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a scaled, blue rotated cube 
generate_cornell_mesh() |>
  add_shape(cube_mesh(position = c(555/2, 100, 555/2), angle=c(0,45,0),
                      scale = c(2,0.5,0.8)*100,
                      material = material_list(diffuse="dodgerblue"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}

Cylinder 3D Model

Description

Cylinder 3D Model

Usage

cylinder_mesh(
  position = c(0, 0, 0),
  radius = 0.5,
  length = 1,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
cylinder_mesh(
  position = c(0, 0, 0),
  radius = 0.5,
  length = 1,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`radius`	Default `0.5`. Radius of the cylinder.
`length`	Default `1`. Length of the cylinder.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a cylinder
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,150,555/2),
                          radius = 50, length=300, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a wide, thin disk
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,20,555/2),
                          radius = 200, length=5, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a narrow cylinder
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,555/2,555/2),angle=c(45,-45,0),
                          radius = 10, length=500, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a cylinder
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,150,555/2),
                          radius = 50, length=300, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a wide, thin disk
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,20,555/2),
                          radius = 200, length=5, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a narrow cylinder
generate_cornell_mesh() |>
  add_shape(cylinder_mesh(position=c(555/2,555/2,555/2),angle=c(45,-45,0),
                          radius = 10, length=500, material = material_list(diffuse="purple"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}

Generate Directional Lights

Description

Generate Directional Lights

Usage

directional_light(direction = c(0, 1, 0), color = "white", intensity = 1)
directional_light(direction = c(0, 1, 0), color = "white", intensity = 1)

Arguments

`direction`	Default `c(0,1,0)`. Direction of the light.
`color`	Default `white`. COlor of the light.
`intensity`	Default `1`. Intensity of the light.

Value

A matrix representing the light information.

Examples

if(run_documentation()) {
#Add a light to scene (manually specify the light automatically added to the Cornell Box
lights = point_light(position=c(555/2,450,555/2),
                    falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights)
 
#Add a directional light
lights_d = add_light(lights, directional_light(direction=c(1,1.5,-1)))

generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
 
#Change the intensity and color
lights_d = add_light(lights, 
                    directional_light(direction=c(1,1.5,-1),color="orange", intensity=0.5))

generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
}
if(run_documentation()) {
#Add a light to scene (manually specify the light automatically added to the Cornell Box
lights = point_light(position=c(555/2,450,555/2),
                    falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights)
 
#Add a directional light
lights_d = add_light(lights, directional_light(direction=c(1,1.5,-1)))

generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
 
#Change the intensity and color
lights_d = add_light(lights, 
                    directional_light(direction=c(1,1.5,-1),color="orange", intensity=0.5))

generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_d)
}

Displace a Mesh

Description

Displace a Mesh

Usage

displace_mesh(
  mesh,
  displacement_texture,
  displacement_scale = 1,
  displacement_vector = FALSE,
  id = NA,
  verbose = TRUE
)
displace_mesh(
  mesh,
  displacement_texture,
  displacement_scale = 1,
  displacement_vector = FALSE,
  id = NA,
  verbose = TRUE
)

Arguments

`mesh`	The mesh.
`displacement_texture`	Image or matrix/array that will be used to displace the mesh
`displacement_scale`	Default `1`. Intensity of the displacement effect. Higher values result in greater displacement.
`displacement_vector`	Default `FALSE`. Whether to use vector displacement. If `TRUE`, the displacement texture is interpreted as providing a 3D displacement vector. Otherwise, the texture is interpreted as providing a scalar displacement.
`id`	Default `NA` (all shapes). The shape index to have new normals calculated.
`verbose`	Default `TRUE`. Whether to print displacement texture information.

Value

raymesh object

Examples

if(run_documentation()) {
 #Let's construct a mesh from the volcano dataset
}
if(run_documentation()) {
 #Let's construct a mesh from the volcano dataset
}

Construct Displacement Sphere

Description

Construct Displacement Sphere

Usage

displacement_sphere(
  displacement_texture,
  displacement_scale = 1,
  use_cube = FALSE,
  cube_subdivision_levels = NA,
  displace = TRUE,
  verbose = TRUE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
displacement_sphere(
  displacement_texture,
  displacement_scale = 1,
  use_cube = FALSE,
  cube_subdivision_levels = NA,
  displace = TRUE,
  verbose = TRUE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`displacement_texture`	Image or matrix/array that will be used to displace the sphere.
`displacement_scale`	Default `1`. Scale of the displacement.
`use_cube`	Default `FALSE`. Whether to use a subdivided cube instead of a UV sphere. Use this if you want to visualize areas near the poles.
`cube_subdivision_levels`	Default `NA`. Uses the dimensions of the displacement texture to automatically calculate the number of subdivision levels.
`displace`	Default `TRUE`. Whether to displace the sphere, or just generate the initial mesh for later displacement.
`verbose`	Default `TRUE`. Whether to print displacement texture information.
`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

raymesh object

Examples

if(run_documentation()) {

}
if(run_documentation()) {

}

Flip Orientation

Description

Flip Orientation

Usage

flip_orientation_mesh(mesh)
flip_orientation_mesh(mesh)

Arguments

mesh

The mesh to swap orientations.

Value

Mesh with flipped vertex orientation

Examples

# Flip a mesh 
if(run_documentation()) {
sphere_mesh(position=c(-1,0,0)) |> 
  add_shape(flip_orientation_mesh(sphere_mesh(position=c(1,0,0)))) |> 
  rasterize_scene(debug="normals",fov=30)
}
# Flip a mesh 
if(run_documentation()) {
sphere_mesh(position=c(-1,0,0)) |> 
  add_shape(flip_orientation_mesh(sphere_mesh(position=c(1,0,0)))) |> 
  rasterize_scene(debug="normals",fov=30)
}

Cornell Box 3D Model

Description

Cornell Box 3D Model

Usage

generate_cornell_mesh(
  leftcolor = "#1f7326",
  rightcolor = "#a60d0d",
  roomcolor = "#bababa",
  ceiling = TRUE,
  light = TRUE
)
generate_cornell_mesh(
  leftcolor = "#1f7326",
  rightcolor = "#a60d0d",
  roomcolor = "#bababa",
  ceiling = TRUE,
  light = TRUE
)

Arguments

`leftcolor`	Default `⁠#1f7326⁠` (green).
`rightcolor`	Default `⁠#a60d0d⁠` (red).
`roomcolor`	Default `⁠#bababa⁠` (light grey).
`ceiling`	Default `TRUE`. Whether to render the ceiling.
`light`	Default `TRUE`. Whether to render a point light near the ceiling.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate and render the default Cornell box and add an object.
generate_cornell_mesh() |> 
  rasterize_scene()
}
if(run_documentation()) {
#Add an object to the scene
generate_cornell_mesh() |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene()
}
if(run_documentation()) {
#Turn off the ceiling so the default directional light reaches inside the box
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene()
}
if(run_documentation()) {
#Adjust the light to the front
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0,1,-1)))
  }
if(run_documentation()) {
#Change the color palette
generate_cornell_mesh(ceiling=FALSE,leftcolor="purple", rightcolor="yellow") |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0,1,-1)))
}
if(run_documentation()) {
#Generate and render the default Cornell box and add an object.
generate_cornell_mesh() |> 
  rasterize_scene()
}
if(run_documentation()) {
#Add an object to the scene
generate_cornell_mesh() |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene()
}
if(run_documentation()) {
#Turn off the ceiling so the default directional light reaches inside the box
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene()
}
if(run_documentation()) {
#Adjust the light to the front
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0,1,-1)))
  }
if(run_documentation()) {
#Change the color palette
generate_cornell_mesh(ceiling=FALSE,leftcolor="purple", rightcolor="yellow") |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=300,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0,1,-1)))
}

Generate Lines

Description

Generate Lines

Usage

generate_line(start = c(0, 0, 0), end = c(0, 1, 0), color = "white")
generate_line(start = c(0, 0, 0), end = c(0, 1, 0), color = "white")

Arguments

`start`	Default `c(0,0,0)`. Start of the line segment.
`end`	Default `c(0,1,0)`. End of the line segment..
`color`	Default `white`. Color of the line segment.

Value

Line matrix

Examples

if(run_documentation()) {
# Make a spiral of lines
t = seq(0,8*pi,length.out=361)
line_mat = matrix(nrow=0,ncol=9)

for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(0.5*sin(t[i]), t[i]/(8*pi), 0.5*cos(t[i])),
                                    end  = c(0.5*sin(t[i+1]), t[i+1]/(8*pi), 0.5*cos(t[i+1]))))
}
rasterize_lines(line_mat)
}
if(run_documentation()) {
#Change the line color
line_mat = matrix(nrow=0,ncol=9)
cols = hsv(seq(0,1,length.out=360))
for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(sin(t[i]), 2*t[i]/(8*pi), cos(t[i])),
                                   end  = c(sin(t[i+1]), 2*t[i+1]/(8*pi), cos(t[i+1])),
                                   color = cols[i]))
}
rasterize_lines(line_mat,lookfrom=c(0,10,10),fov=15)
}
if(run_documentation()) {
#Use in a scene with a mesh
obj_mesh(r_obj(simple_r = TRUE),material=material_list(diffuse="dodgerblue")) |>
 rasterize_scene(line_info = line_mat, light_info = directional_light(c(0,1,1)),
                 lookfrom=c(0,5,10),lookat=c(0,0.8,0),fov=15)
}
if(run_documentation()) {
# Make a spiral of lines
t = seq(0,8*pi,length.out=361)
line_mat = matrix(nrow=0,ncol=9)

for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(0.5*sin(t[i]), t[i]/(8*pi), 0.5*cos(t[i])),
                                    end  = c(0.5*sin(t[i+1]), t[i+1]/(8*pi), 0.5*cos(t[i+1]))))
}
rasterize_lines(line_mat)
}
if(run_documentation()) {
#Change the line color
line_mat = matrix(nrow=0,ncol=9)
cols = hsv(seq(0,1,length.out=360))
for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(sin(t[i]), 2*t[i]/(8*pi), cos(t[i])),
                                   end  = c(sin(t[i+1]), 2*t[i+1]/(8*pi), cos(t[i+1])),
                                   color = cols[i]))
}
rasterize_lines(line_mat,lookfrom=c(0,10,10),fov=15)
}
if(run_documentation()) {
#Use in a scene with a mesh
obj_mesh(r_obj(simple_r = TRUE),material=material_list(diffuse="dodgerblue")) |>
 rasterize_scene(line_info = line_mat, light_info = directional_light(c(0,1,1)),
                 lookfrom=c(0,5,10),lookat=c(0,0.8,0),fov=15)
}

Get Mesh Bounding Box

Description

Calculates the bounding box of a mesh

Usage

get_mesh_bbox(mesh)
get_mesh_bbox(mesh)

Arguments

mesh

The mesh object.

Value

2x3 numeric matrix

Examples

if(run_documentation()) {
#Calculates the center of the mesh
get_mesh_bbox(generate_cornell_mesh())
}
if(run_documentation()) {
#Calculates the center of the mesh
get_mesh_bbox(generate_cornell_mesh())
}

Get Mesh Center

Description

Calculates the coordinates of the center of a mesh

Usage

get_mesh_center(mesh)
get_mesh_center(mesh)

Arguments

mesh

The mesh object.

Value

Length-3 numeric vector

Examples

if(run_documentation()) {
#Calculates the center of the mesh
get_mesh_center(generate_cornell_mesh())
}
if(run_documentation()) {
#Calculates the center of the mesh
get_mesh_center(generate_cornell_mesh())
}

Material List

Description

Generate a material properties list.

Usage

material_list(
  diffuse = c(0.8, 0.8, 0.8),
  ambient = c(0, 0, 0),
  specular = c(1, 1, 1),
  transmittance = c(0, 0, 0),
  emission = c(0, 0, 0),
  shininess = 50,
  ior = 1,
  dissolve = 1,
  illum = 1,
  texture_location = "",
  normal_texture_location = "",
  bump_texture_location = "",
  specular_texture_location = "",
  ambient_texture_location = "",
  emissive_texture_location = "",
  diffuse_intensity = 1,
  bump_intensity = 1,
  specular_intensity = 1,
  emission_intensity = 1,
  ambient_intensity = 1,
  culling = "back",
  type = "diffuse",
  translucent = TRUE,
  toon_levels = 5,
  toon_outline_width = 0.05,
  toon_outline_color = "black",
  reflection_intensity = 0,
  reflection_sharpness = 1,
  two_sided = FALSE
)
material_list(
  diffuse = c(0.8, 0.8, 0.8),
  ambient = c(0, 0, 0),
  specular = c(1, 1, 1),
  transmittance = c(0, 0, 0),
  emission = c(0, 0, 0),
  shininess = 50,
  ior = 1,
  dissolve = 1,
  illum = 1,
  texture_location = "",
  normal_texture_location = "",
  bump_texture_location = "",
  specular_texture_location = "",
  ambient_texture_location = "",
  emissive_texture_location = "",
  diffuse_intensity = 1,
  bump_intensity = 1,
  specular_intensity = 1,
  emission_intensity = 1,
  ambient_intensity = 1,
  culling = "back",
  type = "diffuse",
  translucent = TRUE,
  toon_levels = 5,
  toon_outline_width = 0.05,
  toon_outline_color = "black",
  reflection_intensity = 0,
  reflection_sharpness = 1,
  two_sided = FALSE
)

Arguments

`diffuse`	Default `c(0.5,0.5,0.5)`. The diffuse color.
`ambient`	Default `c(0,0,0)`. The ambient color.
`specular`	Default `c(1,1,1)`. The specular color.
`transmittance`	Default `c(0,0,0)`. The transmittance
`emission`	Default `c(0,0,0)`. The emissive color.
`shininess`	Default `50.0`. The shininess exponent.
`ior`	Default `1.0`. The index of refraction. If this is not equal to `1.0`, the material will be refractive.
`dissolve`	Default `1.0`. The transparency.
`illum`	Default `1.0`. The illumination.
`texture_location`	Default `""`. The diffuse texture location.
`normal_texture_location`	Default `""`. The normal texture location.
`bump_texture_location`	Default `""`. The bump texture location.
`specular_texture_location`	Default `""`. The specular texture location.
`ambient_texture_location`	Default `""`. The ambient texture location.
`emissive_texture_location`	Default `""`. The emissive texture location.
`diffuse_intensity`	Default `1`. The diffuse intensity.
`bump_intensity`	Default `1`. The bump intensity.
`specular_intensity`	Default `1`. The specular intensity.
`emission_intensity`	Default `1`. The emission intensity.
`ambient_intensity`	Default `1`. The ambient intensity.
`culling`	Default `"back"`. The culling type. Options are `back`, `front`, and `none`.
`type`	Default `"diffuse"`. The shader type. Options include `diffuse`,`phong`,`vertex`, and `color`.
`translucent`	Default `FALSE`. Whether light should transmit through a semi-transparent material.
`toon_levels`	Default `5`. Number of color breaks in the toon shader.
`toon_outline_width`	Default `0.05`. Expansion term for model to specify toon outline width.
`toon_outline_color`	Default `black`. Toon outline color.
`reflection_intensity`	Default `0.0`. Intensity of the reflection of the environment map, if present. This will be ignored if the material is refractive.
`reflection_sharpness`	Default `1.0`. Sharpness of the reflection, where lower values have blurrier reflections. Must be greater than zero and less than one.
`two_sided`	Default `FALSE`. Whether diffuse materials should be two sided (normal is taken as the absolute value of the dot product of the light direction and the normal).

Value

List of material properties.

Examples

if(run_documentation()) {
mat_prop = material_list(diffuse="purple", type="phong", shininess = 20,
                        ambient="purple", ambient_intensity=0.3,
                        specular = "red", specular_intensity=2)
                        
p_sphere = sphere_mesh(position=c(555/2,555/2,555/2), 
                      radius=40,material=mat_prop)
                      
rasterize_scene(p_sphere, light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
mat_prop = material_list(diffuse="purple", type="phong", shininess = 20,
                        ambient="purple", ambient_intensity=0.3,
                        specular = "red", specular_intensity=2)
                        
p_sphere = sphere_mesh(position=c(555/2,555/2,555/2), 
                      radius=40,material=mat_prop)
                      
rasterize_scene(p_sphere, light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Mesh3d 3D Model

Description

Mesh3d 3D Model

Usage

mesh3d_mesh(
  mesh,
  center = FALSE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  materialspath = NULL,
  material = material_list()
)
mesh3d_mesh(
  mesh,
  center = FALSE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  materialspath = NULL,
  material = material_list()
)

Arguments

`mesh`	Mesh3d object.
`center`	Default `FALSE`. Whether to center the mesh.
`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`materialspath`	Default `NULL`. Path to the MTL file, if different from the OBJ file.
`material`	Default `NULL`, read from the MTL file. If not `NULL`, this accepts the output from the `material_list()` function to specify the material.

Value

List describing the mesh.

Examples

if(run_documentation()) {
  # Read in a mesh3d object and rasterize it
  library(Rvcg)
  data(humface)
  
  mesh3d_mesh(humface,position = c(0,-0.3,0),scale = 1/70,
              material=material_list(diffuse="dodgerblue4", type="phong", shininess=20,
              ambient = "dodgerblue4", ambient_intensity=0.3)) |>
    rasterize_scene(lookat = c(0,0.5,1), light_info = directional_light(c(1,0.5,1)))
 }
 
 if(run_documentation()) {
  # Subdivide the mesh for a smoother appearance
  mesh3d_mesh(humface,position = c(0,-0.3,0),scale = 1/70,
              material=material_list(diffuse="dodgerblue4", type="phong", shininess=20,
              ambient = "dodgerblue4", ambient_intensity=0.3)) |>
    subdivide_mesh() |> 
    rasterize_scene(lookat = c(0,0.5,1), light_info = directional_light(c(1,0.5,1)))
 }
if(run_documentation()) {
  # Read in a mesh3d object and rasterize it
  library(Rvcg)
  data(humface)
  
  mesh3d_mesh(humface,position = c(0,-0.3,0),scale = 1/70,
              material=material_list(diffuse="dodgerblue4", type="phong", shininess=20,
              ambient = "dodgerblue4", ambient_intensity=0.3)) |>
    rasterize_scene(lookat = c(0,0.5,1), light_info = directional_light(c(1,0.5,1)))
 }
 
 if(run_documentation()) {
  # Subdivide the mesh for a smoother appearance
  mesh3d_mesh(humface,position = c(0,-0.3,0),scale = 1/70,
              material=material_list(diffuse="dodgerblue4", type="phong", shininess=20,
              ambient = "dodgerblue4", ambient_intensity=0.3)) |>
    subdivide_mesh() |> 
    rasterize_scene(lookat = c(0,0.5,1), light_info = directional_light(c(1,0.5,1)))
 }

OBJ Mesh 3D Model

Description

OBJ Mesh 3D Model

Usage

obj_mesh(
  filename,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  materialspath = NULL,
  center = FALSE,
  material = NULL
)
obj_mesh(
  filename,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  materialspath = NULL,
  center = FALSE,
  material = NULL
)

Arguments

`filename`	OBJ filename.
`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`materialspath`	Default `NULL`. Path to the MTL file, if different from the OBJ file.
`center`	Default `FALSE`. Whether to center the mesh.
`material`	Default `NULL`, read from the MTL file. If not `NULL`, this accepts the output from the `material_list()` function to specify the material.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Read in the provided 3D R mesh
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=400,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0.2,0.5,-1)))
}
if(run_documentation()) {
#Read in the provided 3D R mesh
generate_cornell_mesh(ceiling=FALSE) |> 
  add_shape(obj_mesh(r_obj(),position=c(555/2,555/2,555/2),scale=400,angle=c(0,180,0))) |> 
  rasterize_scene(light_info = directional_light(direction=c(0.2,0.5,-1)))
}

PLY Mesh 3D Model

Description

PLY Mesh 3D Model

Usage

ply_mesh(
  filename,
  center = FALSE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
ply_mesh(
  filename,
  center = FALSE,
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`filename`	PLY filename.
`center`	Default `FALSE`. Whether to center the mesh.
`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

#See the documentation for `obj_mesh()`--no example PLY models are included with this package,
#but the process of loading a model is the same (but no materials are included in PLY files).
#See the documentation for `obj_mesh()`--no example PLY models are included with this package,
#but the process of loading a model is the same (but no materials are included in PLY files).

Point light

Description

The falloff of the point light intensity is given by the following equation (referenc:

Intensity = intensity / (constant + falloff * distance + falloff_quad * (distance * distance));

Usage

point_light(
  position = c(0, 0, 0),
  color = "white",
  intensity = 1,
  constant = 1,
  falloff = 1,
  falloff_quad = 1
)
point_light(
  position = c(0, 0, 0),
  color = "white",
  intensity = 1,
  constant = 1,
  falloff = 1,
  falloff_quad = 1
)

Arguments

`position`	A two-dimensional matrix, where each entry in the matrix is the elevation at that point. All points are assumed to be evenly spaced.
`color`	Default `400`. Width of the rendered image.
`intensity`	Default `1`. Intensity of the point light.
`constant`	Default `1`. Constant term. See description for details.
`falloff`	Default `1`. Linear falloff term. See description for details.
`falloff_quad`	Default `1`. Quadratic falloff term. See description for details.

Value

A matrix representing the light information.

Examples

if(run_documentation()) {
#Add point lights and vary the intensity
lights_int = point_light(position=c(100,100,400), color="white", intensity=0.125,
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,400), color="white", intensity=0.25,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,400), color="white", intensity=0.5,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,400), color="white", intensity=1,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_int)
 
#Add point lights and vary the color
lights_c = point_light(position=c(100,100,500), color="red", 
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="blue",
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,500), color="purple", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,500), color="yellow", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_c)
 
#Add point lights and vary the falloff term
lights_fo = point_light(position=c(100,100,500), color="white", 
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="white",
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.01)) |>
 add_light(point_light(position=c(455,100,500), color="white", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.02)) |>
 add_light(point_light(position=c(455,455,500), color="white", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.04))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_fo)
 
#Add point lights and vary the quadradic falloff term
lights_quad = point_light(position=c(100,100,500), color="white", 
                      falloff_quad = 0.0001, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="white",
                       falloff_quad = 0.0002, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,500), color="white", 
                       falloff_quad = 0.0004, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,500), color="white", 
                       falloff_quad = 0.0008, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_quad)
}
if(run_documentation()) {
#Add point lights and vary the intensity
lights_int = point_light(position=c(100,100,400), color="white", intensity=0.125,
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,400), color="white", intensity=0.25,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,400), color="white", intensity=0.5,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,400), color="white", intensity=1,
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_int)
 
#Add point lights and vary the color
lights_c = point_light(position=c(100,100,500), color="red", 
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="blue",
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,500), color="purple", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,500), color="yellow", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_c)
 
#Add point lights and vary the falloff term
lights_fo = point_light(position=c(100,100,500), color="white", 
                      falloff_quad = 0.0, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="white",
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.01)) |>
 add_light(point_light(position=c(455,100,500), color="white", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.02)) |>
 add_light(point_light(position=c(455,455,500), color="white", 
                       falloff_quad = 0.0, constant = 0.0002, falloff = 0.04))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_fo)
 
#Add point lights and vary the quadradic falloff term
lights_quad = point_light(position=c(100,100,500), color="white", 
                      falloff_quad = 0.0001, constant = 0.0002, falloff = 0.005) |>
 add_light(point_light(position=c(100,455,500), color="white",
                       falloff_quad = 0.0002, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,100,500), color="white", 
                       falloff_quad = 0.0004, constant = 0.0002, falloff = 0.005)) |>
 add_light(point_light(position=c(455,455,500), color="white", 
                       falloff_quad = 0.0008, constant = 0.0002, falloff = 0.005))
                       
generate_cornell_mesh(light=FALSE) |>
 rasterize_scene(light_info = lights_quad)
}

R 3D Model

Description

3D obj model of R logo (created from the R SVG logo with the raybevel package), to be used with obj_model()

Usage

r_obj(simple_r = FALSE)
r_obj(simple_r = FALSE)

Arguments

simple_r

Default FALSE. If TRUE, this will return a 3D R (instead of the R logo).

Value

File location of the 3d_r_logo.obj file (saved with a .txt extension)

Examples

#Load and render the included example R object file.
if(run_documentation()) {
obj_mesh(r_obj()) |> 
  rasterize_scene(lookfrom = c(0, 1, 10),
                  fov=7,light_info = directional_light(c(1,1,1)))
}
#Load and render the included example R object file.
if(run_documentation()) {
obj_mesh(r_obj()) |> 
  rasterize_scene(lookfrom = c(0, 1, 10),
                  fov=7,light_info = directional_light(c(1,1,1)))
}

Rasterize Lines

Description

Render a 3D scene made out of lines using a software rasterizer.

Usage

rasterize_lines(
  line_info = NULL,
  filename = NA,
  width = 800,
  height = 800,
  alpha_line = 1,
  parallel = TRUE,
  fov = 20,
  lookfrom = c(0, 0, 10),
  lookat = NULL,
  camera_up = c(0, 1, 0),
  color = "red",
  background = "black",
  debug = "none",
  near_plane = 0.1,
  far_plane = 100,
  block_size = 4,
  ortho_dimensions = c(1, 1),
  bloom = FALSE,
  antialias_lines = TRUE
)
rasterize_lines(
  line_info = NULL,
  filename = NA,
  width = 800,
  height = 800,
  alpha_line = 1,
  parallel = TRUE,
  fov = 20,
  lookfrom = c(0, 0, 10),
  lookat = NULL,
  camera_up = c(0, 1, 0),
  color = "red",
  background = "black",
  debug = "none",
  near_plane = 0.1,
  far_plane = 100,
  block_size = 4,
  ortho_dimensions = c(1, 1),
  bloom = FALSE,
  antialias_lines = TRUE
)

Arguments

`line_info`	The mesh object.
`filename`	Default `NULL`. Filename to save the image. If `NULL`, the image will be plotted.
`width`	Default `400`. Width of the rendered image.
`height`	Default `400`. Width of the rendered image.
`alpha_line`	Default `1`. Line transparency.
`parallel`	Default `TRUE`. Whether to use parallel processing.
`fov`	Default `20`. Width of the rendered image.
`lookfrom`	Default `c(0,0,10)`. Camera location.
`lookat`	Default `NULL`. Camera focal position, defaults to the center of the model.
`camera_up`	Default `c(0,1,0)`. Camera up vector.
`color`	Default `darkred`. Color of model if no material file present (or for faces using the default material).
`background`	Default `white`. Background color.
`debug`	Default `"none"`.
`near_plane`	Default `0.1`.
`far_plane`	Default `100`.
`block_size`	Default `4`.
`ortho_dimensions`	Default `c(1,1)`. Width and height of the orthographic camera. Will only be used if `fov = 0`.
`bloom`	Default `FALSE`. Whether to apply bloom to the image. If `TRUE`, this performs a convolution of the HDR image of the scene with a sharp, long-tailed exponential kernel, which does not visibly affect dimly pixels, but does result in emitters light slightly bleeding into adjacent pixels.
`antialias_lines`	Default `TRUE`. Whether to anti-alias lines in the scene.

Value

Rasterized image.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=0.5),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube non-uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=c(0.8,2,0.4)),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=60,lookfrom=c(3,3,3))
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=0.5),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube non-uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=c(0.8,2,0.4)),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=60,lookfrom=c(3,3,3))
}

Rasterize Scene

Description

Render a 3D scene with meshes, lights, and lines using a software rasterizer.

Usage

rasterize_scene(
  scene,
  filename = NA,
  width = 800,
  height = 800,
  line_info = NULL,
  alpha_line = 1,
  parallel = TRUE,
  plot = is.na(filename),
  fov = 20,
  lookfrom = c(0, 0, 10),
  lookat = NULL,
  camera_up = c(0, 1, 0),
  fsaa = 2,
  light_info = directional_light(),
  color = "red",
  type = "diffuse",
  background = "black",
  tangent_space_normals = TRUE,
  shadow_map = TRUE,
  shadow_map_bias = 0.003,
  shadow_map_intensity = 0,
  shadow_map_dims = NULL,
  ssao = FALSE,
  ssao_intensity = 10,
  ssao_radius = 0.1,
  tonemap = "none",
  debug = "none",
  near_plane = 0.1,
  far_plane = 100,
  shader = "default",
  block_size = 4,
  shape = NULL,
  line_offset = 1e-05,
  ortho_dimensions = c(1, 1),
  bloom = FALSE,
  antialias_lines = TRUE,
  environment_map = "",
  background_sharpness = 1,
  verbose = FALSE,
  vertex_transform = NULL,
  validate_scene = TRUE
)
rasterize_scene(
  scene,
  filename = NA,
  width = 800,
  height = 800,
  line_info = NULL,
  alpha_line = 1,
  parallel = TRUE,
  plot = is.na(filename),
  fov = 20,
  lookfrom = c(0, 0, 10),
  lookat = NULL,
  camera_up = c(0, 1, 0),
  fsaa = 2,
  light_info = directional_light(),
  color = "red",
  type = "diffuse",
  background = "black",
  tangent_space_normals = TRUE,
  shadow_map = TRUE,
  shadow_map_bias = 0.003,
  shadow_map_intensity = 0,
  shadow_map_dims = NULL,
  ssao = FALSE,
  ssao_intensity = 10,
  ssao_radius = 0.1,
  tonemap = "none",
  debug = "none",
  near_plane = 0.1,
  far_plane = 100,
  shader = "default",
  block_size = 4,
  shape = NULL,
  line_offset = 1e-05,
  ortho_dimensions = c(1, 1),
  bloom = FALSE,
  antialias_lines = TRUE,
  environment_map = "",
  background_sharpness = 1,
  verbose = FALSE,
  vertex_transform = NULL,
  validate_scene = TRUE
)

Arguments

`scene`	The scene object.
`filename`	Default `NULL`. Filename to save the image. If `NULL`, the image will be plotted.
`width`	Default `400`. Width of the rendered image.
`height`	Default `400`. Width of the rendered image.
`line_info`	Default `NULL`. Matrix of line segments to add to the scene. Number of rows must be a multiple of 2.
`alpha_line`	Default `1`. Line transparency.
`parallel`	Default `TRUE`. Whether to use parallel processing.
`plot`	Default `is.na(filename)`. Whether to plot the image.
`fov`	Default `20`. Width of the rendered image.
`lookfrom`	Default `c(0,0,10)`. Camera location.
`lookat`	Default `NULL`. Camera focal position, defaults to the center of the model.
`camera_up`	Default `c(0,1,0)`. Camera up vector.
`fsaa`	Default `2`. Full screen anti-aliasing multiplier. Must be positive integer, higher numbers will improve anti-aliasing quality but will vastly increase memory usage.
`light_info`	Default `directional_light()`. Description of scene lights, generated with the `point_light()` and `directional_light()` functions.
`color`	Default `darkred`. Color of model if no material file present (or for faces using the default material).
`type`	Default `diffuse`. Shader type. Other options: `vertex` (Gouraud shading), `phong`, and `color` (no lighting).
`background`	Default `white`. Background color.
`tangent_space_normals`	Default `TRUE`.
`shadow_map`	Default `FALSE`.
`shadow_map_bias`	Default `0.005`.
`shadow_map_intensity`	Default `0.5`.
`shadow_map_dims`	Default `NULL`.
`ssao`	Default `FALSE`. Whether to add screen-space ambient occlusion (SSAO) to the render.
`ssao_intensity`	Default `10`. Intensity of the shadow map.
`ssao_radius`	Default `0.1`. Radius to use when calculating the SSAO term.
`tonemap`	Default `"none"`.
`debug`	Default `"none"`.
`near_plane`	Default `0.1`.
`far_plane`	Default `100`.
`shader`	Default `"default"`.
`block_size`	Default `4`.
`shape`	Default `NULL`. The shape to render in the OBJ mesh.
`line_offset`	Default `0.0001`. Amount to offset lines towards camera to prevent z-fighting.
`ortho_dimensions`	Default `c(1,1)`. Width and height of the orthographic camera. Will only be used if `fov = 0`.
`bloom`	Default `FALSE`. Whether to apply bloom to the image. If `TRUE`, this performs a convolution of the HDR image of the scene with a sharp, long-tailed exponential kernel, which does not visibly affect dimly pixels, but does result in emitters light slightly bleeding into adjacent pixels.
`antialias_lines`	Default `TRUE`. Whether to anti-alias lines in the scene.
`environment_map`	Default `""`. Image file to use as a texture for all reflective and refractive materials in the scene, along with the background.
`background_sharpness`	Default `1.0`. A number greater than zero but less than one indicating the sharpness of the background image.
`verbose`	Default `FALSE`. Prints out timing information.
`vertex_transform`	Default `NULL`. A function that transforms the vertex locations, based on their location. Function should takes a length-3 numeric vector and returns another length-3 numeric vector as the output.
`validate_scene`	Default `TRUE`. Whether to validate the scene input.

Value

Rasterized image.

Examples

if(run_documentation()) {
#Let's load the cube OBJ file included with the package

rasterize_scene(cube_mesh(),lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Flatten the cube, translate downwards, and set to grey
base_model = cube_mesh() |>
 scale_mesh(scale=c(5,0.2,5)) |>
 translate_mesh(c(0,-0.1,0)) |>
 set_material(diffuse="grey80") 
 
rasterize_scene(base_model, lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {           
#load the R OBJ file, scale it down, color it blue, and add it to the grey base
r_model = obj_mesh(r_obj(simple_r = TRUE)) |>
 scale_mesh(scale=0.5) |>
 set_material(diffuse="dodgerblue") |>
 add_shape(base_model)
 
rasterize_scene(r_model, lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Zoom in and reduce the shadow mapping intensity
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,shadow_map = TRUE, shadow_map_intensity=0.3,
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Include the resolution (4x) of the shadow map for less pixellation around the edges
#Also decrease the shadow_map_bias slightly to remove the "peter panning" floating shadow effect
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              shadow_map_dims=4, 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Add some more directional lights and change their color
lights = directional_light(c(0.7,1.1,-0.9),color = "orange",intensity = 1) |>
           add_light(directional_light(c(0.7,1,1),color = "dodgerblue",intensity = 1)) |>
           add_light(directional_light(c(2,4,10),color = "white",intensity = 0.5))
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              light_info = lights)
}
if(run_documentation()) {
#Add some point lights
lights_p = lights |>
 add_light(point_light(position=c(-1,1,0),color="red", intensity=2)) |>
 add_light(point_light(position=c(1,1,0),color="purple", intensity=2)) 
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              light_info = lights_p)
}
if(run_documentation()) {
#change the camera position
rasterize_scene(r_model, lookfrom=c(-2,2,-10), fov=10,
              light_info = lights_p)
}
if(run_documentation()) {
              
#Add a spiral of lines around the model by generating a matrix of line segments
t = seq(0,8*pi,length.out=361)
line_mat = matrix(nrow=0,ncol=9)

for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(0.5*sin(t[i]), t[i]/(8*pi), 0.5*cos(t[i])),
                                    end  = c(0.5*sin(t[i+1]), t[i+1]/(8*pi), 0.5*cos(t[i+1]))))
}

rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10, line_info = line_mat,
              light_info = lights)
}
if(run_documentation()) {
#Let's load the cube OBJ file included with the package

rasterize_scene(cube_mesh(),lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Flatten the cube, translate downwards, and set to grey
base_model = cube_mesh() |>
 scale_mesh(scale=c(5,0.2,5)) |>
 translate_mesh(c(0,-0.1,0)) |>
 set_material(diffuse="grey80") 
 
rasterize_scene(base_model, lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {           
#load the R OBJ file, scale it down, color it blue, and add it to the grey base
r_model = obj_mesh(r_obj(simple_r = TRUE)) |>
 scale_mesh(scale=0.5) |>
 set_material(diffuse="dodgerblue") |>
 add_shape(base_model)
 
rasterize_scene(r_model, lookfrom=c(2,4,10), 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Zoom in and reduce the shadow mapping intensity
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,shadow_map = TRUE, shadow_map_intensity=0.3,
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Include the resolution (4x) of the shadow map for less pixellation around the edges
#Also decrease the shadow_map_bias slightly to remove the "peter panning" floating shadow effect
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              shadow_map_dims=4, 
              light_info = directional_light(direction=c(0.5,1,0.7)))
}
if(run_documentation()) {
#Add some more directional lights and change their color
lights = directional_light(c(0.7,1.1,-0.9),color = "orange",intensity = 1) |>
           add_light(directional_light(c(0.7,1,1),color = "dodgerblue",intensity = 1)) |>
           add_light(directional_light(c(2,4,10),color = "white",intensity = 0.5))
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              light_info = lights)
}
if(run_documentation()) {
#Add some point lights
lights_p = lights |>
 add_light(point_light(position=c(-1,1,0),color="red", intensity=2)) |>
 add_light(point_light(position=c(1,1,0),color="purple", intensity=2)) 
rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10,
              light_info = lights_p)
}
if(run_documentation()) {
#change the camera position
rasterize_scene(r_model, lookfrom=c(-2,2,-10), fov=10,
              light_info = lights_p)
}
if(run_documentation()) {
              
#Add a spiral of lines around the model by generating a matrix of line segments
t = seq(0,8*pi,length.out=361)
line_mat = matrix(nrow=0,ncol=9)

for(i in 1:360) {
  line_mat = add_lines(line_mat,
                      generate_line(start = c(0.5*sin(t[i]), t[i]/(8*pi), 0.5*cos(t[i])),
                                    end  = c(0.5*sin(t[i+1]), t[i+1]/(8*pi), 0.5*cos(t[i+1]))))
}

rasterize_scene(r_model, lookfrom=c(2,4,10), fov=10, line_info = line_mat,
              light_info = lights)
}

Load an OBJ file

Description

Loads an OBJ file and return a ray_mesh list structure. No processing is done on the object other than loading it (unlike obj_model()).

Usage

read_obj(filename, materialspath = NULL)
read_obj(filename, materialspath = NULL)

Arguments

`filename`	Filename of the OBJ file.
`materialspath`	Directory where the MTL file is located. Defaults to the directory of `filename`.

Value

ray_mesh list object #Load an arrow OBJ sphere = read_obj(system.file("extdata", "arrow.txt", package="rayvertex"))

Rotate Lines

Description

Rotate Lines

Usage

rotate_lines(
  lines,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3)
)
rotate_lines(
  lines,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3)
)

Arguments

`lines`	The existing line scene.
`angle`	Default `c(0,0,0)`. The rotation amount for the x/y/z axes, in degrees.
`pivot_point`	Default `c(0,0,0)`. The pivot point of the rotation.
`order_rotation`	Default `c(1,2,3)`. The order in which to perform the rotations.#'

Value

Rotated lines.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around the y-axis
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(0,30,0)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around each axis, in this order: x,y,z
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(30,30,30)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around each axis, in this order: z,y,x
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(30,30,30), 
                           order_rotation = c(3,2,1)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around the y-axis
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(0,30,0)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around each axis, in this order: x,y,z
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(30,30,30)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}
if(run_documentation()) {
#Rotate the cube 30 degrees around each axis, in this order: z,y,x
rotated_cube = color_lines(rotate_lines(cube_outline,angle=c(30,30,30), 
                           order_rotation = c(3,2,1)),color="red")
rasterize_lines(add_lines(cube_outline,rotated_cube),lookfrom=c(0,6,10))
}

Rotate Mesh

Description

Rotate Mesh

Usage

rotate_mesh(
  mesh,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3)
)
rotate_mesh(
  mesh,
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3)
)

Arguments

`mesh`	The mesh.
`angle`	Default `c(0,0,0)`. The rotation amount for the x/y/z axes, in degrees.
`pivot_point`	Default `c(0,0,0)`. The pivot point of the rotation.
`order_rotation`	Default `c(1,2,3)`. The order in which to perform the rotations.

Value

Rotated Mesh

Examples

if(run_documentation()) {
#Rotate a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(rotate_mesh(translate_mesh(robj,c(400,100,155)),c(0,30,0), 
                      pivot_point=c(400,100,155))) |>
add_shape(rotate_mesh(translate_mesh(robj,c(555/2,200,555/2)),c(-30,60,30), 
                      pivot_point=c(555/2,200,555/2))) |>
add_shape(rotate_mesh(translate_mesh(robj,c(155,300,400)),c(-30,60,30), 
                      pivot_point=c(155,300,400), order_rotation=c(3,2,1))) |>
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
#Rotate a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(rotate_mesh(translate_mesh(robj,c(400,100,155)),c(0,30,0), 
                      pivot_point=c(400,100,155))) |>
add_shape(rotate_mesh(translate_mesh(robj,c(555/2,200,555/2)),c(-30,60,30), 
                      pivot_point=c(555/2,200,555/2))) |>
add_shape(rotate_mesh(translate_mesh(robj,c(155,300,400)),c(-30,60,30), 
                      pivot_point=c(155,300,400), order_rotation=c(3,2,1))) |>
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Run Documentation

Description

This function determines if the examples are being run in pkgdown. It is not meant to be called by the user.

Usage

run_documentation()
run_documentation()

Value

Boolean value.

Examples

# See if the documentation should be run.
run_documentation()
# See if the documentation should be run.
run_documentation()

Scale Lines

Description

Scale Lines

Usage

scale_lines(lines, scale = 1)
scale_lines(lines, scale = 1)

Arguments

`lines`	The line scene.
`scale`	Default `c(1,1,1)`. The scale amount, per axis.

Value

Scaled line matrix.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=0.5),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube non-uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=c(0.8,2,0.4)),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=60,lookfrom=c(3,3,3))
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1)))
rasterize_lines(cube_outline,fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=0.5),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=90,lookfrom=c(0,0,3))
}
if(run_documentation()) {
#Scale the cube non-uniformly
scaled_cube = color_lines(scale_lines(cube_outline,scale=c(0.8,2,0.4)),color="red")
rasterize_lines(add_lines(cube_outline,scaled_cube),fov=60,lookfrom=c(3,3,3))
}

Scale Mesh

Description

Scale Mesh

Usage

scale_mesh(mesh, scale = 1, center = c(0, 0, 0))
scale_mesh(mesh, scale = 1, center = c(0, 0, 0))

Arguments

`mesh`	The mesh.
`scale`	Default `c(1,1,1)`. The scale amount, per axis.
`center`	Default `c(0,0,0)`. The center of the scale.

Value

Scaled mesh

Examples

if(run_documentation()) {
#Scale a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(scale_mesh(translate_mesh(robj,c(400,100,155)),0.5, center=c(400,100,155))) |>
add_shape(scale_mesh(translate_mesh(robj,c(555/2,200,555/2)),1.5, center=c(555/2,200,555/2))) |>
add_shape(scale_mesh(translate_mesh(robj,c(55,300,400)),c(0.5,2,0.5), center=c(155,300,400))) |>
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
#Scale a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(scale_mesh(translate_mesh(robj,c(400,100,155)),0.5, center=c(400,100,155))) |>
add_shape(scale_mesh(translate_mesh(robj,c(555/2,200,555/2)),1.5, center=c(555/2,200,555/2))) |>
add_shape(scale_mesh(translate_mesh(robj,c(55,300,400)),c(0.5,2,0.5), center=c(155,300,400))) |>
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Scale Mesh to Unit Bounding Box

Description

Scale Mesh to Unit Bounding Box

Usage

scale_unit_mesh(mesh, center_mesh = FALSE)
scale_unit_mesh(mesh, center_mesh = FALSE)

Arguments

`mesh`	The mesh.
`center_mesh`	Default `FALSE`. Whether to center the mesh at the origin after scaling.

Value

Scaled mesh

Examples

if(run_documentation()) {
#Scale the Cornell box (and contents) down to the unit box.
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(scale_mesh(translate_mesh(robj,c(400,100,155)),0.5, center=c(400,100,155))) |>
add_shape(scale_mesh(translate_mesh(robj,c(555/2,200,555/2)),1.5, center=c(555/2,200,555/2))) |>
add_shape(scale_mesh(translate_mesh(robj,c(55,300,400)),c(0.5,2,0.5), center=c(155,300,400))) |>
scale_unit_mesh(center_mesh = TRUE) |> 
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)), 
                lookfrom = c(0,0,-2), lookat=c(0,0,0))
}
if(run_documentation()) {
#Scale the Cornell box (and contents) down to the unit box.
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))

generate_cornell_mesh() |>
add_shape(scale_mesh(translate_mesh(robj,c(400,100,155)),0.5, center=c(400,100,155))) |>
add_shape(scale_mesh(translate_mesh(robj,c(555/2,200,555/2)),1.5, center=c(555/2,200,555/2))) |>
add_shape(scale_mesh(translate_mesh(robj,c(55,300,400)),c(0.5,2,0.5), center=c(155,300,400))) |>
scale_unit_mesh(center_mesh = TRUE) |> 
rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)), 
                lookfrom = c(0,0,-2), lookat=c(0,0,0))
}

Scene From List

Description

Fast generation of rayvertex scenes from a list of objects (much faster than calling add_shape() on each object individually to build the scene). This returns a ray_scene object that cdoes

Usage

scene_from_list(scene_list)
scene_from_list(scene_list)

Arguments

scene_list

List containing rayvertex mesh objects.

Value

ray_scene containing mesh info.

Examples

if(run_documentation()) {
 #Build a scene out of cubes including 87 * 61 = 5307 objects
 scene = list()
 volcol = rainbow(103)
 counter = 1
 for(i in 1:nrow(volcano)) {
   for(j in 1:ncol(volcano)) {
     scene[[counter]] = cube_mesh(position = c(i,(volcano[i,j]-94),j), 
                                  material = material_list(diffuse = volcol[volcano[i,j]-92],
                                                           ambient = volcol[volcano[i,j]-92],
                                                           ambient_intensity = 0.2))
     counter = counter + 1
   }
 }
 #Quickly generate the 
 new_scene = scene_from_list(scene)
 new_scene |> 
   rotate_mesh(c(0,10,0), pivot_point = c(44,0,31)) |> 
   add_shape(xz_rect_mesh(position=c(44,0,31),scale=500,
                          material = material_list(diffuse="lightblue",
                                                   ambient = "lightblue",
                                                   ambient_intensity = 0.2))) |> 
   rasterize_scene(lookfrom=c(500,500,500), lookat = c(44.00, 40.50, 31.00),
                   width=800,height=800, fov=0, ortho_dimensions = c(140,140),
                   light_info = directional_light(c(-0.6,1,0.6)))
}
if(run_documentation()) {
 #Build a scene out of cubes including 87 * 61 = 5307 objects
 scene = list()
 volcol = rainbow(103)
 counter = 1
 for(i in 1:nrow(volcano)) {
   for(j in 1:ncol(volcano)) {
     scene[[counter]] = cube_mesh(position = c(i,(volcano[i,j]-94),j), 
                                  material = material_list(diffuse = volcol[volcano[i,j]-92],
                                                           ambient = volcol[volcano[i,j]-92],
                                                           ambient_intensity = 0.2))
     counter = counter + 1
   }
 }
 #Quickly generate the 
 new_scene = scene_from_list(scene)
 new_scene |> 
   rotate_mesh(c(0,10,0), pivot_point = c(44,0,31)) |> 
   add_shape(xz_rect_mesh(position=c(44,0,31),scale=500,
                          material = material_list(diffuse="lightblue",
                                                   ambient = "lightblue",
                                                   ambient_intensity = 0.2))) |> 
   rasterize_scene(lookfrom=c(500,500,500), lookat = c(44.00, 40.50, 31.00),
                   width=800,height=800, fov=0, ortho_dimensions = c(140,140),
                   light_info = directional_light(c(-0.6,1,0.6)))
}

Segment 3D Model

Description

Segment 3D Model

Usage

segment_mesh(
  start = c(0, -1, 0),
  end = c(0, 1, 0),
  radius = 0.5,
  direction = NA,
  from_center = TRUE,
  square = FALSE,
  material = material_list()
)
segment_mesh(
  start = c(0, -1, 0),
  end = c(0, 1, 0),
  radius = 0.5,
  direction = NA,
  from_center = TRUE,
  square = FALSE,
  material = material_list()
)

Arguments

`start`	Default `c(0, 0, 0)`. Base of the segment, specifying `x`, `y`, `z`.
`end`	Default `c(0, 1, 0)`. End of the segment, specifying `x`, `y`, `z`.
`radius`	Default `0.5`. Radius of the cylinder.
`direction`	Default `NA`. Alternative to `start` and `end`, specify the direction (via a length-3 vector) of the arrow. Arrow will be centered at `start`, and the length will be determined by the magnitude of the direction vector.
`from_center`	Default `TRUE`. If orientation specified via `direction`, setting this argument to `FALSE` will make `start` specify the bottom of the cone, instead of the middle.
`square`	Default `FALSE`. If `TRUE`, will use a square instead of a circle for the cylinder.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a segment in the cornell box. 
generate_cornell_mesh() |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(455, 455, 455), radius = 50)) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
# Draw a line graph representing a normal distribution, but with metal:
xvals = seq(-3, 3, length.out = 30)
yvals = dnorm(xvals)

scene_list = list()
for(i in 1:(length(xvals) - 1)) {
  scene_list = add_shape(scene_list, 
                         segment_mesh(start = c(555/2 + xvals[i] * 80, yvals[i] * 800, 555/2),
                            end = c(555/2 + xvals[i + 1] * 80, yvals[i + 1] * 800, 555/2),
                            radius = 10,
                            material = material_list(diffuse="purple", type="phong")))
}

generate_cornell_mesh() |> 
  add_shape(scene_list) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Draw the outline of a cube:

cube_outline = segment_mesh(start = c(100, 100, 100), end = c(100, 100, 455), radius = 10) |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(100, 455, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(455, 100, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 455), end = c(100, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 455), end = c(455, 100, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 455), end = c(100, 455, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 455), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 455, 100), end = c(455, 100, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 455, 100), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 100, 100), end = c(455, 100, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 100, 455), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 100), end = c(455, 455, 100), radius = 10))

generate_cornell_mesh() |>
  add_shape(set_material(cube_outline,diffuse="dodgerblue",type="phong")) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
  }
if(run_documentation()) {
#Shrink and rotate the cube
generate_cornell_mesh() |>
  add_shape(
    scale_mesh(rotate_mesh(set_material(cube_outline,diffuse="dodgerblue",type="phong"),
                angle=c(45,45,45), pivot_point=c(555/2,555/2,555/2)),0.5,
                center=c(555/2,555/2,555/2))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Generate a segment in the cornell box. 
generate_cornell_mesh() |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(455, 455, 455), radius = 50)) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
# Draw a line graph representing a normal distribution, but with metal:
xvals = seq(-3, 3, length.out = 30)
yvals = dnorm(xvals)

scene_list = list()
for(i in 1:(length(xvals) - 1)) {
  scene_list = add_shape(scene_list, 
                         segment_mesh(start = c(555/2 + xvals[i] * 80, yvals[i] * 800, 555/2),
                            end = c(555/2 + xvals[i + 1] * 80, yvals[i + 1] * 800, 555/2),
                            radius = 10,
                            material = material_list(diffuse="purple", type="phong")))
}

generate_cornell_mesh() |> 
  add_shape(scene_list) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Draw the outline of a cube:

cube_outline = segment_mesh(start = c(100, 100, 100), end = c(100, 100, 455), radius = 10) |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(100, 455, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 100), end = c(455, 100, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 455), end = c(100, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 100, 455), end = c(455, 100, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 455), end = c(100, 455, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 455), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 455, 100), end = c(455, 100, 100), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 455, 100), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 100, 100), end = c(455, 100, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(455, 100, 455), end = c(455, 455, 455), radius = 10)) |>
  add_shape(segment_mesh(start = c(100, 455, 100), end = c(455, 455, 100), radius = 10))

generate_cornell_mesh() |>
  add_shape(set_material(cube_outline,diffuse="dodgerblue",type="phong")) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
  }
if(run_documentation()) {
#Shrink and rotate the cube
generate_cornell_mesh() |>
  add_shape(
    scale_mesh(rotate_mesh(set_material(cube_outline,diffuse="dodgerblue",type="phong"),
                angle=c(45,45,45), pivot_point=c(555/2,555/2,555/2)),0.5,
                center=c(555/2,555/2,555/2))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}

Set Material

Description

Set the material(s) of the mesh.

Usage

set_material(
  mesh,
  material = NULL,
  id = NULL,
  diffuse = c(0.5, 0.5, 0.5),
  ambient = c(0, 0, 0),
  specular = c(1, 1, 1),
  transmittance = c(0, 0, 0),
  emission = c(0, 0, 0),
  shininess = 50,
  ior = 1,
  dissolve = 1,
  illum = 1,
  texture_location = "",
  normal_texture_location = "",
  bump_texture_location = "",
  specular_texture_location = "",
  ambient_texture_location = "",
  emissive_texture_location = "",
  diffuse_intensity = 1,
  bump_intensity = 1,
  specular_intensity = 1,
  emission_intensity = 1,
  ambient_intensity = 1,
  culling = "back",
  type = "diffuse",
  translucent = TRUE,
  toon_levels = 5,
  toon_outline_width = 0.05,
  toon_outline_color = "black",
  reflection_intensity = 0,
  reflection_sharpness = 0,
  two_sided = FALSE
)
set_material(
  mesh,
  material = NULL,
  id = NULL,
  diffuse = c(0.5, 0.5, 0.5),
  ambient = c(0, 0, 0),
  specular = c(1, 1, 1),
  transmittance = c(0, 0, 0),
  emission = c(0, 0, 0),
  shininess = 50,
  ior = 1,
  dissolve = 1,
  illum = 1,
  texture_location = "",
  normal_texture_location = "",
  bump_texture_location = "",
  specular_texture_location = "",
  ambient_texture_location = "",
  emissive_texture_location = "",
  diffuse_intensity = 1,
  bump_intensity = 1,
  specular_intensity = 1,
  emission_intensity = 1,
  ambient_intensity = 1,
  culling = "back",
  type = "diffuse",
  translucent = TRUE,
  toon_levels = 5,
  toon_outline_width = 0.05,
  toon_outline_color = "black",
  reflection_intensity = 0,
  reflection_sharpness = 0,
  two_sided = FALSE
)

Arguments

`mesh`	The target mesh.
`material`	Default `NULL`. You can pass the output of the `material_list()` function to specify the material, or use the following individual settings.
`id`	Default `1`. Either a number specifying the material to change, or a character vector matching the material name.
`diffuse`	Default `c(0.5,0.5,0.5)`. The diffuse color.
`ambient`	Default `c(0,0,0)`. The ambient color.
`specular`	Default `c(1,1,1)`. The specular color.
`transmittance`	Default `c(0,0,0)`. The transmittance.
`emission`	Default `c(0,0,0)`. The emissive color.
`shininess`	Default `50.0`. The shininess exponent.
`ior`	Default `1.0`. The index of refraction. If this is not equal to `1.0`, the material will be refractive.
`dissolve`	Default `1.0`. The transparency.
`illum`	Default `1.0`. The illumination.
`texture_location`	Default `""`. The diffuse texture location.
`normal_texture_location`	Default `""`. The normal texture location.
`bump_texture_location`	Default `""`. The bump texture location.
`specular_texture_location`	Default `""`. The specular texture location.
`ambient_texture_location`	Default `""`. The ambient texture location.
`emissive_texture_location`	Default `""`. The emissive texture location.
`diffuse_intensity`	Default `1`. The diffuse intensity.
`bump_intensity`	Default `1`. The bump intensity.
`specular_intensity`	Default `1`. The specular intensity.
`emission_intensity`	Default `1`. The emission intensity.
`ambient_intensity`	Default `1`. The ambient intensity.
`culling`	Default `"back"`. The culling type. Options are `back`, `front`, and `none`.
`type`	Default `"diffuse"`. The shader type. Options include `diffuse`,`phong`,`vertex`, and `color`.
`translucent`	Default `TRUE`. Whether light should transmit through a semi-transparent material.
`toon_levels`	Default `5`. Number of color breaks in the toon shader.
`toon_outline_width`	Default `0.05`. Expansion term for model to specify toon outline width. Note: setting this property via this function currently does not generate outlines. Specify it during object creation.
`toon_outline_color`	Default `black`. Toon outline color. Note: setting this property via this function currently does not color outlines. Specify it during object creation.
`reflection_intensity`	Default `0.0`. Intensity of the reflection of the environment map, if present. This will be ignored if the material is refractive.
`reflection_sharpness`	Default `1.0`. Sharpness of the reflection, where lower values have blurrier reflections. Must be greater than zero and less than one.
`two_sided`	Default `NULL`. Whether diffuse materials should be two sided (normal is taken as the absolute value of the dot product of the light direction and the normal).

Value

Shape with new material

Examples

if(run_documentation()) {
#Set the material of an object
generate_cornell_mesh() |>
 add_shape(set_material(sphere_mesh(position=c(400,555/2,555/2),radius=40), 
                        diffuse="purple", type="phong")) |>
 add_shape(set_material(sphere_mesh(position=c(555/2,220,555/2),radius=40),
                        dissolve=0.2,culling="none",diffuse="red")) |>
 add_shape(set_material(sphere_mesh(position=c(155,300,555/2),radius=60), 
                        material = material_list(diffuse="gold", type="phong", 
                                                 ambient="gold", ambient_intensity=0.4))) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
 }
if(run_documentation()) {
#Set the material of an object
generate_cornell_mesh() |>
 add_shape(set_material(sphere_mesh(position=c(400,555/2,555/2),radius=40), 
                        diffuse="purple", type="phong")) |>
 add_shape(set_material(sphere_mesh(position=c(555/2,220,555/2),radius=40),
                        dissolve=0.2,culling="none",diffuse="red")) |>
 add_shape(set_material(sphere_mesh(position=c(155,300,555/2),radius=60), 
                        material = material_list(diffuse="gold", type="phong", 
                                                 ambient="gold", ambient_intensity=0.4))) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
 }

Calculate Smooth Mesh Normals

Description

Calculate Smooth Mesh Normals

Usage

smooth_normals_mesh(mesh, id = NA)
smooth_normals_mesh(mesh, id = NA)

Arguments

`mesh`	The mesh.
`id`	Default `NA` (all shapes). The shape index to have new normals calculated.

Value

Mesh with new vertex normals

Examples

if(run_documentation()) {
 #Let's construct a mesh from the volcano dataset
 #Build the vertex matrix
  vertex_list = list()
  counter = 1
  for(i in 1:nrow(volcano)) {
    for(j in 1:ncol(volcano)) {
      vertex_list[[counter]] = matrix(c(j,volcano[i,j],i), ncol=3)
      counter = counter + 1
    }
  }
  vertices = do.call(rbind,vertex_list)
  
  #Build the index matrix
  index_list = list()
  counter = 0
  for(i in 1:(nrow(volcano)-1)) {
    for(j in 1:(ncol(volcano)-1)) {
      index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                         counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1), 
                                       nrow=2, ncol=3, byrow=TRUE)
      counter = counter + 1
    }
    counter = counter + 1
  }
  indices = do.call(rbind,index_list)
  #Construct the mesh
  volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                             material = material_list(type="diffuse", diffuse="darkred", 
                                                      ambient = "darkred", ambient_intensity=0.2))
  #Rasterize the no-normal scene
  scale_mesh(volc_mesh, scale = c(1,1/3,1)) |> 
    center_mesh() |> 
    rasterize_scene(lookfrom=c(-50,50,100),lookat=c(7,-15,0), fov=40,width=800,height=800,
                    light_info = directional_light(c(0,1,1)) |>
                      add_light(directional_light(c(1,1,-1))))
                      
  #Smooth the mesh
  volc_mesh_smooth = smooth_normals_mesh(volc_mesh)
  
  #Rasterize the scene
  scale_mesh(volc_mesh_smooth, scale = c(1,1/3,1)) |> 
    center_mesh() |> 
    rasterize_scene(lookfrom=c(-50,50,100),lookat=c(7,-15,0), fov=40,width=800,height=800,
                    light_info = directional_light(c(0,1,1)) |>
                      add_light(directional_light(c(1,1,-1))))
}
if(run_documentation()) {
 #Let's construct a mesh from the volcano dataset
 #Build the vertex matrix
  vertex_list = list()
  counter = 1
  for(i in 1:nrow(volcano)) {
    for(j in 1:ncol(volcano)) {
      vertex_list[[counter]] = matrix(c(j,volcano[i,j],i), ncol=3)
      counter = counter + 1
    }
  }
  vertices = do.call(rbind,vertex_list)
  
  #Build the index matrix
  index_list = list()
  counter = 0
  for(i in 1:(nrow(volcano)-1)) {
    for(j in 1:(ncol(volcano)-1)) {
      index_list[[counter+1]] = matrix(c(counter,counter+ncol(volcano),counter+1,
                                         counter+ncol(volcano),counter+ncol(volcano)+1,counter + 1), 
                                       nrow=2, ncol=3, byrow=TRUE)
      counter = counter + 1
    }
    counter = counter + 1
  }
  indices = do.call(rbind,index_list)
  #Construct the mesh
  volc_mesh = construct_mesh(vertices = vertices, indices = indices,
                             material = material_list(type="diffuse", diffuse="darkred", 
                                                      ambient = "darkred", ambient_intensity=0.2))
  #Rasterize the no-normal scene
  scale_mesh(volc_mesh, scale = c(1,1/3,1)) |> 
    center_mesh() |> 
    rasterize_scene(lookfrom=c(-50,50,100),lookat=c(7,-15,0), fov=40,width=800,height=800,
                    light_info = directional_light(c(0,1,1)) |>
                      add_light(directional_light(c(1,1,-1))))
                      
  #Smooth the mesh
  volc_mesh_smooth = smooth_normals_mesh(volc_mesh)
  
  #Rasterize the scene
  scale_mesh(volc_mesh_smooth, scale = c(1,1/3,1)) |> 
    center_mesh() |> 
    rasterize_scene(lookfrom=c(-50,50,100),lookat=c(7,-15,0), fov=40,width=800,height=800,
                    light_info = directional_light(c(0,1,1)) |>
                      add_light(directional_light(c(1,1,-1))))
}

Sphere 3D Model

Description

Sphere 3D Model

Usage

sphere_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  radius = 1,
  low_poly = FALSE,
  normals = TRUE,
  material = material_list()
)
sphere_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  radius = 1,
  low_poly = FALSE,
  normals = TRUE,
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`radius`	Default `1`. Radius of the sphere.
`low_poly`	Default `FALSE`. If `TRUE`, will use a low-poly sphere.
`normals`	Default `TRUE`. Whether to include vertex normals.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a sphere in the Cornell box.
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 555/2, 555/2), radius = 100)) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Generate a shiny sphere in the Cornell box
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 100, 555/2), radius = 100, 
                    material = material_list(diffuse = "gold",type="phong"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate an ellipsoid in the Cornell box
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 210, 555/2), radius = 100, 
                        angle=c(0,30,0), scale = c(0.5,2,0.5),
                        material = material_list(diffuse = "dodgerblue",type="phong"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate a sphere in the Cornell box.
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 555/2, 555/2), radius = 100)) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Generate a shiny sphere in the Cornell box
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 100, 555/2), radius = 100, 
                    material = material_list(diffuse = "gold",type="phong"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}
if(run_documentation()) {
#Generate an ellipsoid in the Cornell box
generate_cornell_mesh() |>
  add_shape(sphere_mesh(position = c(555/2, 210, 555/2), radius = 100, 
                        angle=c(0,30,0), scale = c(0.5,2,0.5),
                        material = material_list(diffuse = "dodgerblue",type="phong"))) |>
  rasterize_scene(light_info = directional_light(c(0.5,0.5,-1)))
}

Subdivide Mesh

Description

Applies Loop subdivision to the scene (or selected meshes).

Usage

subdivide_mesh(
  scene,
  id = NA,
  subdivision_levels = 2,
  simple = FALSE,
  normals = TRUE,
  verbose = FALSE
)
subdivide_mesh(
  scene,
  id = NA,
  subdivision_levels = 2,
  simple = FALSE,
  normals = TRUE,
  verbose = FALSE
)

Arguments

`scene`	The scene to subdivide.
`id`	Default `NA`, all shapes. The index of which shape to subdivide.
`subdivision_levels`	Default `1`. Number of Loop subdivisions to be applied to the mesh.
`simple`	Default `FALSE`. Whether to use simple subdivision, which does not change the appearance of the mesh but does create a finer mesh.
`normals`	Default `TRUE`. Whether to calculate subdivided vertex normals.
`verbose`	Default `FALSE`.

Value

Scene with shape added.

Examples

if(run_documentation()) {
#Subdivide the included R mesh
obj_mesh(r_obj(),position=c(-0.5,0,0)) |> 
  add_shape(subdivide_mesh(obj_mesh(r_obj(),position=c(0.5,0,0)),
                           subdivision_levels = 2)) |> 
  rasterize_scene(light_info = directional_light(direction=c(0.2,0.5,1)),fov=13)
}
if(run_documentation()) {
#Subdivide the included R mesh
obj_mesh(r_obj(),position=c(-0.5,0,0)) |> 
  add_shape(subdivide_mesh(obj_mesh(r_obj(),position=c(0.5,0,0)),
                           subdivision_levels = 2)) |> 
  rasterize_scene(light_info = directional_light(direction=c(0.2,0.5,1)),fov=13)
}

Swap Y/Z Axis

Description

Swap Y/Z Axis

Usage

swap_yz(mesh)
swap_yz(mesh)

Arguments

mesh

A raymesh object.

Value

Mesh with Y and Z axis exchanged

Examples

# Flip a mesh that's originally aligned along the y-axis
if(run_documentation()) {
cyl_mat = material_list(ambient="red", ambient_intensity=0.3, 
                        diffuse="red", diffuse_intensity=0.7)
change_material(cylinder_mesh(length = 3, position=c(0,2,0), material = cyl_mat),
                diffuse="green", ambient="green") |> 
  add_shape(swap_yz(cylinder_mesh(position=c(0,2,0), length=3, material = cyl_mat))) |> 
  rasterize_scene(lookfrom=c(10,10,10), lookat=c(0,0,0), fov=40,
                  light_info = directional_light(c(1,1,-1)),
                  line_info = generate_line(end=c(10,0,0)) |> 
                  add_lines(generate_line(end=c(0,10,0),color="green")) |> 
                  add_lines(generate_line(end=c(0,0,10),color="red")))
}
# Flip a mesh that's originally aligned along the y-axis
if(run_documentation()) {
cyl_mat = material_list(ambient="red", ambient_intensity=0.3, 
                        diffuse="red", diffuse_intensity=0.7)
change_material(cylinder_mesh(length = 3, position=c(0,2,0), material = cyl_mat),
                diffuse="green", ambient="green") |> 
  add_shape(swap_yz(cylinder_mesh(position=c(0,2,0), length=3, material = cyl_mat))) |> 
  rasterize_scene(lookfrom=c(10,10,10), lookat=c(0,0,0), fov=40,
                  light_info = directional_light(c(1,1,-1)),
                  line_info = generate_line(end=c(10,0,0)) |> 
                  add_lines(generate_line(end=c(0,10,0),color="green")) |> 
                  add_lines(generate_line(end=c(0,0,10),color="red")))
}

Text Object

Description

Text Object

Usage

text3d_mesh(
  label,
  position = c(0, 0, 0),
  text_height = 1,
  orientation = "xy",
  color = "black",
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  scale = c(1, 1, 1)
)
text3d_mesh(
  label,
  position = c(0, 0, 0),
  text_height = 1,
  orientation = "xy",
  color = "black",
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  scale = c(1, 1, 1)
)

Arguments

`label`	Text string.
`position`	Default `c(0,0,0)`. Position of the mesh.
`text_height`	Default `1`. Height of the text.
`orientation`	Default `xy`. Orientation of the plane. Other options are `yz` and `xz`.
`color`	Default `black`. Text color.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Generate a label in the Cornell box.
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="Cornell Box", position=c(555/2,555/2,555/2),angle=c(0,180,0),
  text_height=60)) |> 
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
#Change the orientation
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="YZ Plane", position=c(540,555/2,555/2),text_height=100,
                    orientation = "yz",angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="XY Plane", position=c(555/2,555/2,540),text_height=100,
                    orientation = "xy", angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="XZ Plane", position=c(555/2,15,555/2),text_height=100,
                    orientation = "xz", angle=c(0,0,0))) |> 
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
#Add an label in front of a sphere
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="Cornell Box", position=c(555/2,555/2,555/2),text_height=60,
                    color="grey20",angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="Sphere", position=c(555/2,100,100),text_height=30,
                    color="white",angle=c(0,180,0))) |> 
  add_shape(sphere_mesh(radius=100,position=c(555/2,100,555/2),
                    material=material_list(diffuse="purple",type="phong"))) |>                  
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
  
#A room full of bees
bee_scene = list()
for(i in 1:100) {
bee_scene = add_shape(bee_scene, text3d_mesh("B", position=c(20+runif(3)*525), 
                                             color="yellow", text_height = 50,
                                             angle=c(0,180,0)))
}
generate_cornell_mesh() |> 
  add_shape(bee_scene) |>                   
  rasterize_scene(light=directional_light(c(0,1,-1)))
}
if(run_documentation()) {
#Generate a label in the Cornell box.
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="Cornell Box", position=c(555/2,555/2,555/2),angle=c(0,180,0),
  text_height=60)) |> 
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
#Change the orientation
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="YZ Plane", position=c(540,555/2,555/2),text_height=100,
                    orientation = "yz",angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="XY Plane", position=c(555/2,555/2,540),text_height=100,
                    orientation = "xy", angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="XZ Plane", position=c(555/2,15,555/2),text_height=100,
                    orientation = "xz", angle=c(0,0,0))) |> 
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
#Add an label in front of a sphere
generate_cornell_mesh() |> 
  add_shape(text3d_mesh(label="Cornell Box", position=c(555/2,555/2,555/2),text_height=60,
                    color="grey20",angle=c(0,180,0))) |> 
  add_shape(text3d_mesh(label="Sphere", position=c(555/2,100,100),text_height=30,
                    color="white",angle=c(0,180,0))) |> 
  add_shape(sphere_mesh(radius=100,position=c(555/2,100,555/2),
                    material=material_list(diffuse="purple",type="phong"))) |>                  
  rasterize_scene(light_info = directional_light(c(0.1,0.4,-1)))
  }
if(run_documentation()) {
  
#A room full of bees
bee_scene = list()
for(i in 1:100) {
bee_scene = add_shape(bee_scene, text3d_mesh("B", position=c(20+runif(3)*525), 
                                             color="yellow", text_height = 50,
                                             angle=c(0,180,0)))
}
generate_cornell_mesh() |> 
  add_shape(bee_scene) |>                   
  rasterize_scene(light=directional_light(c(0,1,-1)))
}

Torus 3D Model

Description

Torus 3D Model

Usage

torus_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  radius = 0.5,
  ring_radius = 0.2,
  sides = 36,
  rings = 36,
  material = material_list()
)
torus_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  radius = 0.5,
  ring_radius = 0.2,
  sides = 36,
  rings = 36,
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`radius`	Default `0.5`. The radius of the torus.
`ring_radius`	Default `0.2`. The radius of the ring.
`sides`	Default `36`. The number of faces around the ring when triangulating the torus.
`rings`	Default `36`. The number of faces around the torus.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
#Plot a group of tori in the cornell box
generate_cornell_mesh(ceiling = FALSE) |> 
 add_shape(torus_mesh(position=c(555/2,555/3,555/2), angle=c(20,0,45),
                      radius=120, ring_radius = 40,
                      material = material_list(diffuse="dodgerblue4",type="phong",
                                               ambient="dodgerblue4",ambient_intensity=0.2))) |>
 add_shape(torus_mesh(position=c(400,400,555/2), angle=c(20,200,45),radius=80, ring_radius = 30,
                      material=material_list(diffuse="orange",type="phong",
                                             ambient="orange",ambient_intensity=0.2))) |>
 add_shape(torus_mesh(position=c(150,450,555/2), angle=c(60,180,0),radius=40, ring_radius = 20,
                      material=material_list(diffuse="red",type="phong"))) |>
 rasterize_scene(light_info = directional_light(c(0,1,-2)))
}
if(run_documentation()) {
#Plot a group of tori in the cornell box
generate_cornell_mesh(ceiling = FALSE) |> 
 add_shape(torus_mesh(position=c(555/2,555/3,555/2), angle=c(20,0,45),
                      radius=120, ring_radius = 40,
                      material = material_list(diffuse="dodgerblue4",type="phong",
                                               ambient="dodgerblue4",ambient_intensity=0.2))) |>
 add_shape(torus_mesh(position=c(400,400,555/2), angle=c(20,200,45),radius=80, ring_radius = 30,
                      material=material_list(diffuse="orange",type="phong",
                                             ambient="orange",ambient_intensity=0.2))) |>
 add_shape(torus_mesh(position=c(150,450,555/2), angle=c(60,180,0),radius=40, ring_radius = 20,
                      material=material_list(diffuse="red",type="phong"))) |>
 rasterize_scene(light_info = directional_light(c(0,1,-2)))
}

Translate Lines

Description

Translate Lines

Usage

translate_lines(lines, position = 1)
translate_lines(lines, position = 1)

Arguments

`lines`	The line scene.
`position`	Default `c(0,0,0)`. The translation vector.

Value

Translated line matrix.

Examples

if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1))) 
rasterize_lines(cube_outline,fov=40,lookfrom=c(1,2,10),lookat=c(0,0,0))
}
if(run_documentation()) {
#Scale the cube uniformly
translated_cube = color_lines(translate_lines(cube_outline,c(1,1,1)),"red")
translated_cube2 = color_lines(translate_lines(cube_outline,c(-1,-1,-1)),"green")

cube_outline |>
  add_lines(translated_cube) |>
  add_lines(translated_cube2) |>
  rasterize_lines(fov=40,lookfrom=c(1,2,10),lookat=c(0,0,0))
}
if(run_documentation()) {
#Generate a cube out of lines
cube_outline = generate_line(start = c(-1, -1, -1), end = c(-1, -1, 1)) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(-1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, -1, 1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(-1, 1, -1))) |>
  add_lines(generate_line(start = c(-1, 1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, -1, -1))) |>
  add_lines(generate_line(start = c(1, 1, -1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(1, -1, -1), end = c(1, -1, 1))) |>
  add_lines(generate_line(start = c(1, -1, 1), end = c(1, 1, 1))) |>
  add_lines(generate_line(start = c(-1, 1, -1), end = c(1, 1, -1))) 
rasterize_lines(cube_outline,fov=40,lookfrom=c(1,2,10),lookat=c(0,0,0))
}
if(run_documentation()) {
#Scale the cube uniformly
translated_cube = color_lines(translate_lines(cube_outline,c(1,1,1)),"red")
translated_cube2 = color_lines(translate_lines(cube_outline,c(-1,-1,-1)),"green")

cube_outline |>
  add_lines(translated_cube) |>
  add_lines(translated_cube2) |>
  rasterize_lines(fov=40,lookfrom=c(1,2,10),lookat=c(0,0,0))
}

Translate Mesh

Description

Translate Mesh

Usage

translate_mesh(mesh, position = c(0, 0, 0))
translate_mesh(mesh, position = c(0, 0, 0))

Arguments

`mesh`	The mesh.
`position`	Default `c(0,0,0)`. The translation vector.

Value

Translated mesh

Examples

if(run_documentation()) {
#Translate a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))
generate_cornell_mesh() |>
 add_shape(translate_mesh(robj,c(400,100,155))) |>
 add_shape(translate_mesh(robj,c(555/2,200,555/2))) |>
 add_shape(translate_mesh(robj,c(155,300,400))) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}
if(run_documentation()) {
#Translate a mesh in the Cornell box
robj = obj_mesh(r_obj(), scale=150,angle=c(0,180,0))
generate_cornell_mesh() |>
 add_shape(translate_mesh(robj,c(400,100,155))) |>
 add_shape(translate_mesh(robj,c(555/2,200,555/2))) |>
 add_shape(translate_mesh(robj,c(155,300,400))) |>
 rasterize_scene(light_info=directional_light(direction=c(0.1,0.6,-1)))
}

Validate Mesh Data

Description

This function takes a mesh and validates it. The mesh should be a list with "shapes", "materials", "vertices", "texcoords", "normals", and "material_hashes" entries.

Usage

validate_mesh(mesh, validate_materials = TRUE)
validate_mesh(mesh, validate_materials = TRUE)

Arguments

`mesh`	List. A mesh is a list as described above.
`validate_materials`	Default `TRUE`. Whether or not to validate "materials".

Value

A mesh.

Shapes

Each "shapes" entry should be a list with "mesh", "name", and "material" entries. Each "mesh" entry should have "indices", "tex_indices", "norm_indices", "material_ids", "has_vertex_tex", and "has_vertex_normals". The indices should not exceed the number of rows in their corresponding vertex/normal/texcoord data. There should be no NA/NaN values in the vertex/normal/texcoord data.

Materials (for rayvertex package only)

Each "materials" entry is expected to be a list with several entries with specific required lengths, as listed below:

Attribute	Length	Type
diffuse	3	Numeric
ambient	3	Numeric
specular	3	Numeric
transmittance	3	Numeric
emission	3	Numeric
shininess	1	Numeric
ior	1	Numeric
dissolve	1	Numeric
illum	1	Numeric
diffuse_texname	1	Character
normal_texname	1	Character
bump_texname	1	Character
specular_texname	1	Character
ambient_texname	1	Character
emissive_texname	1	Character
diffuse_intensity	1	Numeric
bump_intensity	1	Numeric
specular_intensity	1	Numeric
emission_intensity	1	Numeric
ambient_intensity	1	Numeric
culling	1	Character
type	1	Character
translucent	1	Logical
toon_levels	1	Numeric
toon_outline_width	1	Numeric
toon_outline_color	3	Numeric
reflection_intensity	1	Numeric
reflection_sharpness	1	Numeric
two_sided	1	Logical

Note: This materials validation only applies to the rayvertex package. Other renderers might choose to use their own information in the material list.

Examples

# validate a mesh
mesh = validate_mesh(sphere_mesh())
# validate a mesh
mesh = validate_mesh(sphere_mesh())

Write the scene to an OBJ file

Description

Writes the current scene to a Wavefront OBJ file, with or without materials

Usage

write_scene_to_obj(scene, filename, materials = TRUE, fileext = ".obj")
write_scene_to_obj(scene, filename, materials = TRUE, fileext = ".obj")

Arguments

`scene`	A rayvertex scene.
`filename`	The filename for the OBJ file.
`materials`	Default `TRUE`. Whether to write an MTL file to specify the materials for the OBJ.
`fileext`	Default `".obj"`. The file extension to add to the filename.

Value

None

Examples

if(run_documentation()) {
tmpfile = tempfile(fileext = ".obj")
write_scene_to_obj(generate_cornell_mesh(), tmpfile)
}
if(run_documentation()) {
tmpfile = tempfile(fileext = ".obj")
write_scene_to_obj(generate_cornell_mesh(), tmpfile)
}

XY Rectangle 3D Model

Description

XY Rectangle 3D Model

Usage

xy_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
xy_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(xy_rect_mesh(position = c(555/2, 100, 555/2), scale=200,
             material = material_list(diffuse = "purple"),angle=c(0,180,0))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate the plane and scale 
generate_cornell_mesh() |>
  add_shape(xy_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,100,1), angle=c(0,180,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(xy_rect_mesh(position = c(555/2, 100, 555/2), scale=200,
             material = material_list(diffuse = "purple"),angle=c(0,180,0))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate the plane and scale 
generate_cornell_mesh() |>
  add_shape(xy_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,100,1), angle=c(0,180,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}

XZ Rectangle 3D Model

Description

XZ Rectangle 3D Model

Usage

xz_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
xz_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(xz_rect_mesh(position = c(555/2, 100, 555/2), scale=200,
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate the plane and scale 
generate_cornell_mesh() |>
  add_shape(xz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,1,100), angle=c(0,30,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(xz_rect_mesh(position = c(555/2, 100, 555/2), scale=200,
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate the plane and scale 
generate_cornell_mesh() |>
  add_shape(xz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,1,100), angle=c(0,30,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}

YZ Rectangle 3D Model

Description

YZ Rectangle 3D Model

Usage

yz_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)
yz_rect_mesh(
  position = c(0, 0, 0),
  scale = c(1, 1, 1),
  angle = c(0, 0, 0),
  pivot_point = c(0, 0, 0),
  order_rotation = c(1, 2, 3),
  material = material_list()
)

Arguments

`position`	Default `c(0,0,0)`. Position of the mesh.
`scale`	Default `c(1,1,1)`. Scale of the mesh. Can also be a single numeric value scaling all axes uniformly.
`angle`	Default `c(0,0,0)`. Angle to rotate the mesh.
`pivot_point`	Default `c(0,0,0)`. Point around which to rotate the mesh.
`order_rotation`	Default `c(1,2,3)`. Order to rotate the axes.
`material`	Default `material_list()` (default values). Specify the material of the object.

Value

List describing the mesh.

Examples

if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(yz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,1,200), angle=c(0,0,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate and scale
generate_cornell_mesh() |>
  add_shape(yz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(300,1,200), angle=c(0,45,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
generate_cornell_mesh() |>
  add_shape(yz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(200,1,200), angle=c(0,0,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}
if(run_documentation()) {
#Rotate and scale
generate_cornell_mesh() |>
  add_shape(yz_rect_mesh(position = c(555/2, 100, 555/2), scale=c(300,1,200), angle=c(0,45,0),
             material = material_list(diffuse = "purple"))) |>
  rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
}

Package 'rayvertex'

Help Index

Add light

Description

Usage

Arguments

Value

Examples

Add Line

Description

Usage

Arguments

Value

Examples

Add Plane UV Mapping to Mesh

Description

Usage

Arguments

Value

Examples

Add Shape

Description

Usage

Arguments

Value

Examples

Add Sphere UV Mapping to Mesh

Description

Usage

Arguments

Value

Examples

Arrow 3D Model

Description

Usage

Arguments

Value

Examples

Center Mesh

Description

Usage

Arguments

Value

Examples

Change Material

Description

Usage

Arguments

Value

Examples

Color Lines

Description

Usage

Arguments

Value

Examples

Cone 3D Model

Description

Usage

Arguments

Value

Examples

Manually construct a mesh

Description

Usage

Arguments

Value

Examples

Cube 3D Model

Description

Usage

Arguments

Value

Examples

Cylinder 3D Model

Description

Usage

Arguments

Value

Examples