input transformations

Allen Akin akin at
Mon Feb 5 19:34:02 PST 2007

On Mon, Feb 05, 2007 at 04:36:18PM -0800, Allen Akin wrote:
| On Mon, Feb 05, 2007 at 10:51:59AM -0500, David Reveman wrote:
| | Why do we need a quad mesh to represent projective transforms? ...
| I don't think you do; I believe it's sufficient to use four-coordinate
| vertices with the homogeneous coordinates chosen correctly.  That's one
| of the reasons the Vertex4 commands and formats exist.

I might have misunderstood what you were trying to accomplish, in which
case it would be homogeneous *texture* coordinates that you need, rather
than vertex coordinates.

Sorry for the confusion.  It's been a long day here...


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