Segment 3D Model

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

# \dontshow{ options("cores"=1) # } #Generate a segment in the cornell box. # \donttest{ 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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
# } # 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"))) } # \donttest{ generate_cornell_mesh() %>% add_shape(scene_list) %>% rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
# } #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)) # \donttest{ generate_cornell_mesh() %>% add_shape(set_material(cube_outline,diffuse="dodgerblue",type="phong")) %>% rasterize_scene(light_info = directional_light(c(0,0.5,-1)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
# } #Shrink and rotate the cube # \donttest{ 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)))
#> Setting default values for Cornell box: lookfrom `c(278,278,-800)` lookat `c(278,278,0)` fov `40` .
# }