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Geometric Transformations
2D to 3D Object Definition
Vertices in motion ("Generative object description")
Line is drawn by tracing path of a point as it moves (one dimensional entity)
Square drawn by tracing vertices of a line as it moves perpendicularly to itself (two dimensional entity)

Cube drawn by tracing paths of vertices of a square as it moves perpendicularly to itself (three-dimensional entity)
Circle drawn by swinging a point at a fixed length around a center point
Polygons into polyhedra



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Geometric Transformations - 09 MAY 95
Page 12 of 51
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