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Wenhui
05-24-2010, 06:47 PM
Hello guys,

Anybody give me some suggestion to improve the performance of my drawing? Or give me some reference

thanks,

Wenhui

Lord crc
05-24-2010, 07:48 PM
Have you tried a wider pencil?


Seriously, if you want any sensible replies you will have to give a lot more detailed information on how you're currently drawing things.

ZbuffeR
05-25-2010, 01:34 AM
First have a read here for basics :
http://www.opengl.org/wiki/Performance

Then for more precise help, as said Lord crc, you will indeed have to give details about your hardware gpu/vram/cpu/ram/OS, how you draw things, what you draw, what rendering speed you expect, etc.

glfreak
05-25-2010, 06:46 AM
Rule of thumb: Keep the GPU always busy :)

Minimize redundant state changes.

Batch geometry that share the same textures and shaders or rendering states

Use triangle strips whenever possible.

Use indexing

Use only VBOs

ZbuffeR
05-25-2010, 07:34 AM
Triangle strips are not that good. Try simple indexed triangles with vertices in "hilbert curve" order instead, takes advantage of any size of vertex cache.

Wenhui
05-25-2010, 11:27 PM
Thanks, guys

Gomu.Wang
05-26-2010, 06:42 PM
And another powerful tool: use display list as possible as you can.