Do unused vertices in a 3D object affect performance?

Posted by Gajet on Game Development See other posts from Game Development or by Gajet
Published on 2012-03-25T20:04:08Z Indexed on 2012/03/26 5:43 UTC
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opengl

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directx

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dynamic-mesh

For my game I need to generate a mesh dynamically. Now I'm wondering does it have a noticeable affect in FPS if I allocate more vertices than what I'm actually using or not? and does it matter if I'm using DirectX or OpenGL?

Edit

Final output will be a w*h cell grid, but for technical issues it's much easier for me to allocate (w+1)*(h+1) vertices. Sure I'll only use w*h vertices in indexing, and I know there is some memory wasting there, but I want to know if it also affect FPS or not? (Note that mesh is only generated once in each time you play the game)

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