Text Object

Text Object

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

# \dontshow{
options("cores"=1)
# }
#Generate a label in the Cornell box.
# \donttest{
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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
#> Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): there is no package called ‘terra’
  
#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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
#> Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): there is no package called ‘terra’
  
#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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
#> Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): there is no package called ‘terra’
  
  
#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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
#> Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): there is no package called ‘terra’
# }