Figure 15.13 A pyramid built by scaling a square cross section to 0.01 at the pyramid apex.
15fig13.wrl	Click on the image to view the VRML scene.

#VRML V2.0 utf8
# The VRML 2.0 Sourcebook
# Copyright (c) 1997
# Andrea L. Ames, David R. Nadeau, and John L. Moreland
Shape {
    appearance Appearance {
        material Material {
            diffuseColor 1.0 0.5 0.0
        }
    }
    geometry Extrusion {
        crossSection [
        # Square
            -1.0  1.0,   1.0  1.0,
             1.0 -1.0,  -1.0 -1.0,
            -1.0  1.0
        ]
        spine [ 0.0 0.0 0.0,  0.0 1.0 0.0 ]
        scale [ 1.0 1.0,      0.01 0.01 ]
    }
}