Calculates a color for each point on the surface using a direct elevation-to-color mapping.
height_shade(
heightmap,
texture = (grDevices::colorRampPalette(c("#6AA85B", "#D9CC9A", "#FFFFFF")))(256),
range = NULL,
keep_user_par = TRUE
)Arguments
- heightmap
A two-dimensional matrix, where each entry in the matrix is the elevation at that point.
- texture
Default `terrain.colors(256)`. A color palette for the plot.
- range
Default `NULL`, the full range of the heightmap. A length-2 vector specifying the maximum and minimum values to map the color palette to.
- keep_user_par
Default `TRUE`. Whether to keep the user's `par()` settings. Set to `FALSE` if you want to set up a multi-pane plot (e.g. set `par(mfrow)`).
Value
RGB array of hillshaded texture mappings.
Examples
#Create a direct mapping of elevation to color:
montereybay %>%
height_shade() %>%
plot_map()
#Add a shadow:
if(run_documentation()) {
montereybay %>%
height_shade() %>%
add_shadow(ray_shade(montereybay,zscale=50),0.3) %>%
plot_map()
}
#Change the palette:
if(run_documentation()) {
montereybay %>%
height_shade(texture = topo.colors(256)) %>%
add_shadow(ray_shade(montereybay,zscale=50),0.3) %>%
plot_map()
}
#Really change the palette:
if(run_documentation()) {
montereybay %>%
height_shade(texture = rainbow(256)) %>%
add_shadow(ray_shade(montereybay,zscale=50),0.3) %>%
plot_map()
}
