| add_shadow {rayshader} | R Documentation |
Multiplies a texture array or shadow map by a shadow map.
add_shadow(hillshade, shadowmap, max_darken = 0.7, rescale_original = FALSE)
hillshade |
A three-dimensional RGB array or 2D matrix of shadow intensities. |
shadowmap |
A matrix that incidates the intensity of the shadow at that point. 0 is full darkness, 1 is full light. |
max_darken |
Default '0.7'. The lower limit for how much the image will be darkened. 0 is completely black, 1 means the shadow map will have no effect. |
rescale_original |
Default 'FALSE'. If 'TRUE', 'hillshade' will be scaled to match the dimensions of 'shadowmap' (instead of the other way around). |
Shaded texture map.
#First we plot the sphere_shade() hillshade of `montereybay` with no shadows montereybay %>% sphere_shade(colorintensity=0.5) %>% plot_map() #Raytrace the `montereybay` elevation map and add that shadow to the output of sphere_shade() montereybay %>% sphere_shade(colorintensity=0.5) %>% add_shadow(ray_shade(montereybay,sunaltitude=20,zscale=50),max_darken=0.3) %>% plot_map() #Increase the intensity of the shadow map with the max_darken argument. montereybay %>% sphere_shade(colorintensity=0.5) %>% add_shadow(ray_shade(montereybay,sunaltitude=20,zscale=50),max_darken=0.1) %>% plot_map() #Decrease the intensity of the shadow map. montereybay %>% sphere_shade(colorintensity=0.5) %>% add_shadow(ray_shade(montereybay,sunaltitude=20,zscale=50),max_darken=0.7) %>% plot_map()