Figure 21.4a A dull gray vase. Compare with Figures 21.4b, c, and d.
21fig04a.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
Group {
    children [
        PointLight {
            location 3.0 3.0 3.0
            ambientIntensity 0.2
        },
        Shape {
            appearance Appearance {
                material Material {
                    diffuseColor 0.40 0.40 0.40
                }
            }
            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,
                ]
            }
        }
    ]
}