Figure 18.22b A four-screen video wall, each screen created by stamping out one fourth of a mountain texture image and using a TextureTransform node to translate the texture cookie cutter.
18fig22b.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 [
    # Lower-left video screen
        Shape {
            appearance Appearance {
                # no material, use emissive texturing
                texture DEF Video ImageTexture {
                    url "grand.jpg"
                }
            }
            geometry DEF Screen IndexedFaceSet {
                solid FALSE
                coord Coordinate {
                    point [
                        0.0 0.0 0.0,  1.0 0.0 0.0,
                        1.0 1.0 0.0,  0.0 1.0 0.0,
                    ]
                }
                coordIndex [ 0, 1, 2, 3 ]
                texCoord TextureCoordinate {
                    point [
                        0.0 0.0,  0.5 0.0,
                        0.5 0.5,  0.0 0.5,
                    ]
                }
                texCoordIndex [ 0, 1, 2, 3 ]
            }
        },
    # Lower-right video screen
        Transform {
            translation 1.1 0.0 0.0
            children Shape {
                appearance Appearance {
                # no material, use emissive texturing
                    texture USE Video
                    textureTransform TextureTransform {
                    # Slide to lower-right quadrant
                        translation 0.5 0.0
                    }
                }
                geometry USE Screen
            }
        },
    # Upper-left video screen
        Transform {
            translation 0.0 1.1 0.0
            children Shape {
                appearance Appearance {
                # no material, use emissive texturing
                    texture USE Video
                    textureTransform TextureTransform {
                    # Slide to upper-left quadrant
                        translation 0.0 0.5
                    }
                }
                geometry USE Screen
            }
        },
    # Upper-right video screen
        Transform {
            translation 1.1 1.1 0.0
            children Shape {
                appearance Appearance {
                # no material, use emissive texturing
                    texture USE Video
                    textureTransform TextureTransform {
                    # Slide to upper-right quadrant
                        translation 0.5 0.5
                    }
                }
                geometry USE Screen
            }
        }
    ]
}