Relation between texture and texel coordinates

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WRVO (WRVO++at++chevron.com)
Tue, 6 Jul 1999 12:23:52 -0700

What is the exact relationship between texture coordinates and how they
relate to the actual texel coordinates, especially when the textures have
overlap? How does the border come into play with the rasterization?

Without overlap, I know that a texture coordinate of 0.0 corresponds to
texel coordinate of 0 and texture coordinate of 1.0 corresponds to texel
coordinate n-1 (where n is the size of the corresponding dimension). What I
want to know is how overlap is taken into account when the hardware is
converting the texel data to raster data and which texels would be accessed.

Thanks,

William R Volz - Senior Research Geophysicist
Chevron Petroleum Technology
Voice: 281-596-2059 Fax: 281-596-3009

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