Diffuse Material
diffuse(color = "#ffffff", checkercolor = NA, checkerperiod = 3, noise = 0, noisephase = 0, noiseintensity = 10, noisecolor = "#000000", image_array = NA, fog = FALSE, fogdensity = 0.01, sigma = NULL, importance_sample = FALSE)
Arguments
| color | Default `white`. The color of the surface. Can be either a hexadecimal code, R color string, or a numeric rgb vector listing three intensities between `0` and `1`. |
|---|---|
| checkercolor | Default `NA`. If not `NA`, determines the secondary color of the checkered surface. Can be either a hexadecimal code, or a numeric rgb vector listing three intensities between `0` and `1`. |
| checkerperiod | Default `3`. The period of the checker pattern. Increasing this value makes the checker pattern bigger, and decreasing it makes it smaller |
| noise | Default `0`. If not `0`, covers the surface in a turbulent marble pattern. This value will determine the amount of turbulence in the texture. |
| noisephase | Default `0`. The phase of the noise. The noise will repeat at `360`. |
| noiseintensity | Default `10`. Intensity of the noise. |
| noisecolor | Default `#000000`. The secondary color of the noise pattern. Can be either a hexadecimal code, or a numeric rgb vector listing three intensities between `0` and `1`. |
| image_array | A 3-layer RGB array to be used as the texture on the surface of the object. |
| fog | Default `FALSE`. If `TRUE`, the object will be a volumetric scatterer. |
| fogdensity | Default `0.01`. The density of the fog. Higher values will produce more opaque objects. |
| sigma | Default `NULL`. A number between 0 and Infinity specifying the roughness of the surface using the Oren-Nayar microfacet model. Higher numbers indicate a roughed surface, where sigma is the standard deviation of the microfacet orientation angle. When 0, this reverts to the default lambertian behavior. |
| importance_sample | Default `FALSE`. If `TRUE`, the object will be sampled explicitly during the rendering process. If the object is particularly important in contributing to the light paths in the image (e.g. light sources, refracting glass ball with caustics, metal objects concentrating light), this will help with the convergence of the image. |
Value
Single row of a tibble describing the diffuse material.
Examples
#Generate the cornell box and add a single white sphere to the center scene = generate_cornell() %>% add_object(sphere(x=555/2,y=555/2,z=555/2,radius=555/8,material=diffuse()))render_scene(scene, lookfrom=c(278,278,-800),lookat = c(278,278,0), samples=500, aperture=0, fov=40, ambient_light=FALSE, parallel=TRUE)#Add a checkered rectangular cube below scene = scene %>% add_object(cube(x=555/2,y=555/8,z=555/2,xwidth=555/2,ywidth=555/4,zwidth=555/2, material = diffuse(checkercolor="purple",checkerperiod=20)))render_scene(scene, lookfrom=c(278,278,-800),lookat = c(278,278,0), samples=500, aperture=0, fov=40, ambient_light=FALSE, parallel=TRUE)#Add a marbled sphere scene = scene %>% add_object(sphere(x=555/2+555/4,y=555/2,z=555/2,radius=555/8, material = diffuse(noise=1/20)))render_scene(scene, lookfrom=c(278,278,-800),lookat = c(278,278,0), samples=500, aperture=0, fov=40, ambient_light=FALSE, parallel=TRUE)#Add an orange volumetric (fog) cube scene = scene %>% add_object(cube(x=555/2-555/4,y=555/2,z=555/2,xwidth=555/4,ywidth=555/4,zwidth=555/4, material = diffuse(fog=TRUE, fogdensity=0.05,color="orange")))render_scene(scene, lookfrom=c(278,278,-800),lookat = c(278,278,0), samples=500, aperture=0, fov=40, ambient_light=FALSE, parallel=TRUE)
