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OpenGL Vertexarrays and Displaylists in OpenGL

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Hi everyone, i''m using compiled displaylists made of vertex arrays. Now i''ve heard that vertex array ALLWAYS keep in main memory, but on the other hand i''ve heard, that displaylists ALLWAYS resident in graphics memory. So what is true? Am i able to change some vertex coords without recompiling the list? Or can i free up the memory used by the vertexarray because it''s now compiled in the graphics memory? bye eloso

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