Add surface
Adds a surface to the current scene. The surface is defined by a matrix defining the height of each grid point and two vectors defining the grid.
surface3d(x, y, z, ..., normal_x = NULL, normal_y = NULL, normal_z = NULL) terrain3d(x, y, z, ..., normal_x = NULL, normal_y = NULL, normal_z = NULL)
x |
values corresponding to rows of |
y |
values corresponding to the columns of |
z |
matrix of heights |
... |
Material and texture properties. See |
normal_x, normal_y, normal_z |
matrices of the same dimension as |
Adds a surface mesh to the current scene. The surface is defined by
the matrix of height values in z, with rows corresponding
to the values in x and columns corresponding to the values in
y. This is the same parametrization as used in persp.
If the x or y argument is a matrix, then it must be of the same
dimension as z, and the values in the matrix will be used for the corresponding
coordinates. This is used to plot shapes such as cylinders
where z is not a function of x and y.
If the normals are not supplied, they will be calculated automatically based on neighbouring points.
surface3d always draws the surface with the ‘front’ upwards
(i.e. towards higher z values). This can be used to render
the top and bottom differently; see rgl.material and
the example below.
For more flexibility in defining the surface, use rgl.surface.
surface3d and terrain3d are synonyms.
rgl.material, rgl.surface.
See persp3d for a higher level interface.
# # volcano example taken from "persp" # z <- 2 * volcano # Exaggerate the relief x <- 10 * (1:nrow(z)) # 10 meter spacing (S to N) y <- 10 * (1:ncol(z)) # 10 meter spacing (E to W) zlim <- range(z) zlen <- zlim[2] - zlim[1] + 1 colorlut <- terrain.colors(zlen) # height color lookup table col <- colorlut[ z - zlim[1] + 1 ] # assign colors to heights for each point open3d() surface3d(x, y, z, color = col, back = "lines")
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