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[GLSL]Calculating the center of the polygon

Graphics and GPU Programming Programming

Started by someboddy January 15, 2009 07:24 AM

1 comment, last by someboddy 15 years, 3 months ago

someboddy

100

Author

January 15, 2009 07:24 AM

I need to calculate the center of each polygon I draw for my fading effect. Right now I'm calculating it in the CPU, send it to the vertex shader using an attribute, and than sending it to the fragment shader using a varying. I think my current solution is too cumbersome. Is there a way to calculate the center in the vertex shader itself?

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lc_overlord

436

January 15, 2009 08:42 AM

no, you have to use the geometry shader for that if you can.

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someboddy

100

Author

January 15, 2009 09:32 AM

I see...

Well, if that's the case I'll just keep calculating it in the CPU. No point to implement a geometry shader for just that...

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