[ros-kernel] TEB offsets wrong - suggested fix - feedback pls

Filip Navara xnavara at volny.cz
Thu Feb 5 21:34:32 CET 2004


David Welch wrote:

>Do bear in mind that OpenGL uses function calls to specify each element of
>a vertex to be drawn (one for the position, one for the normal, one for
>the texture coordinate, etc) and on modern hardware the effect of these calls
>is probably just to write the parameters into a circular buffer in memory; so
>the overhead could be more than you think.
>  
>
You're right on this, but also any good OpenGL application is optimized 
to pass whole buffers at once using glVertexPointer, glNormalPointer, 
glColorPointer, glIndexPointer, glTexCoordPointer and/or 
glEdgeFlagPointer, so the overhead for optimized programs will not raise 
that much.

- Filip



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