Figure 15.14 A vase built by scaling a circular cross section at each coordinate along a straight spine.
15fig14.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 0.8 0.0
        }
    }
    geometry Extrusion {
        creaseAngle 1.57
        endCap FALSE
        solid  FALSE
        crossSection [
        # Circle
             1.00  0.00,   0.92 -0.38,
             0.71 -0.71,   0.38 -0.92,
             0.00 -1.00,  -0.38 -0.92,
            -0.71 -0.71,  -0.92 -0.38,
            -1.00 -0.00,  -0.92  0.38,
            -0.71  0.71,  -0.38  0.92,
             0.00  1.00,   0.38  0.92,
             0.71  0.71,   0.92  0.38,
             1.00  0.00
        ]
        spine [
        # Straight-line
            0.0 0.0 0.0,  0.0 0.4 0.0,
            0.0 0.8 0.0,  0.0 1.2 0.0,
            0.0 1.6 0.0,  0.0 2.0 0.0,
            0.0 2.4 0.0,  0.0 2.8 0.0,
            0.0 3.2 0.0,  0.0 3.6 0.0,
            0.0 4.0 0.0
        ]
        scale [
            1.8  1.8,  1.95 1.95,
            2.0  2.0,  1.95 1.95
            1.8  1.8,  1.5  1.5
            1.2  1.2,  1.05 1.05,
            1.0  1.0,  1.05  1.05,
            1.15 1.15,
        ]
    }
}