rgl (version 0.65)

surface3d: add height-field surface shape

Description

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.

Usage

surface3d(x, y, z, ...)
terrain3d(x, y, z, ...)

Arguments

x

values corresponding to rows of z

y

values corresponding to the columns of z

z

matrix of heights

...

Material and texture properties. See rgl.material for details.

Details

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. 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.

See Also

rgl.material, rgl.surface, persp

Examples

#
# volcano example taken from "persp"
#

data(volcano)

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(y)
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")