Display lists are the Bees Knees! But...
BlitzMax Forums/OpenGL Module/Display lists are the Bees Knees! But...
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| I have a question about them. Without using display lists, you would group all of your "glbegin gl_Quads" and your "glbegin gl_Points" together. This is faster because glbegin is an expensive call. Do display lists negate this effect? |
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| i wouldnt worry to much about grouping them... the potential speed increase (if noticable) could be offset by the complexity of trying to group all your quads and points together... |
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| I had that thought put in my head by this guy glBegin and glEnd can be expensive calls in tight loops. If you have an object containing a polygon and, say a line (to indicate its normal?), it would be better to have two loops: first one for drawing all the polygons in the object and second one to draw all the lines in the objects, rather than calling glBegin and glEnd 4 times in one loop each iteration He himself questioned it though. So it probably isn't true. Ok then. Good to know. |
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| He's talking about tight loops ie small loops where you are going to have almost as many glbegin/glend calls as actual polygons. |
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| Display lists are a alot faster because they store all the required data on the gpu in video memory. Nvidia cards render display lists faster than any other form of gl rendering. |
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