Abstract
Generating images of texture mapped geometry requires projecting surfaces onto a two-dimensional screen. If this projection involves perspective, then a division must be performed at each pixel of the projected surface in order to correctly calculate texture map coordinates. We show how a simple extension to perspective-comect texture mapping can be used to create various lighting effects, These in- clude arbitrary projection of two-dimensional images onto geom- etry, realistic spotlights, and generation of shadows using shadow maps( 10). These effects are obtained in real time using hardware that performs correct texture mapping.
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