glPolygonOffset

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2 comments, last by core114 22 years, 8 months ago
i am drawing a square-ish tile made out of two traingles, then redrawing it with blending on to show it is selected i am using glPolygonOffset to prevent problems with zbuffering however, when it is partly off of the screen it doesn''t work right, and there are what look to be z buffer problems it works fine otherwise is there some problem with using glPolygonOffset with clipped geometry? any help would be usefull
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If it some problems should it be the driver. Do some more testing so you will know for sure what is not working.
glPolygonOffset is quite a hard beast to get right. one possible reason is when a polygon is clipped the geometry does not go through the same pipelineand thus even though u use the same vertices u end up getting different depth values
If you''re redrawing the tile over itself to look different so the user knows which tile is selected try drawing the tile only once, but just tinting it a different color or something.

use glColor*f before you start drawing.

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- outRider -

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