| rgl.surface {rgl} | R Documentation |
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.
rgl.surface(x, z, y, coords=1:3, ...)
x |
values corresponding to rows of y
|
y |
matrix of height values |
z |
values corresponding to columns of y
|
coords |
See details |
... |
Material and texture properties. See rgl.material for details. |
Adds a surface mesh to the current scene. The surface is defined by
the matrix of height values in y, with rows corresponding
to the values in x and columns corresponding to the values in
z.
The coords parameter can be used to change the geometric
interpretation of x, y, and z. The first entry
of coords indicates which coordinate (1=X,
2=Y, 3=Z) corresponds to the x parameter.
Similarly the second entry corresponds to the y parameter,
and the third entry to the z parameter. In this way
surfaces may be defined over any coordinate plane.
rgl.surface always draws the surface with the `front' upwards
(i.e. towards higher y values). This can be used to render
the top and bottom differently; see rgl.material and
the example below.
rgl.material, surface3d, terrain3d
# # volcano example taken from "persp" # data(volcano) y <- 2 * volcano # Exaggerate the relief x <- 10 * (1:nrow(y)) # 10 meter spacing (S to N) z <- 10 * (1:ncol(y)) # 10 meter spacing (E to W) ylim <- range(y) ylen <- ylim[2] - ylim[1] + 1 colorlut <- terrain.colors(ylen) # height color lookup table col <- colorlut[ y-ylim[1]+1 ] # assign colors to heights for each point rgl.clear() rgl.surface(x, z, y, color=col, back="lines")