causes the program to exit with an error message. I’ve checked that I’m not getting a null address from wglGetProcAddress, so that can’t be it. I’m running on win95 with the 43.45 drivers, and my graphics card is a geforce2 MX 400.
I think I might have defined the types GLsizeiptrARB and GLintptrARB wrong. I’m using Delphi and can’t find the bindings anywhere. I’ve tried longInt and cardinal, but neither seems to work.
I declared both as Integer – come to think of it, that’s actually wrong for GLsizeiptr, which should be Cardinal (unsigned). It still works, though. You could try my headers at www.delphi3d.net/dot if you’re not confident about your own.
Thanks, Tom! It works now, altough I must admit that the real problem was that my context wasn’t active… So stupid, but it’s good you helped me get those types straight too.
I have drop perfomance if ELEMENT_ARRAY placed in STATIC_DRAW buffer on nVidia GeforceFX 5800 Ultra, det. 43.51
I think index process by driver by copying from video to system.
If i place index data to system memory, it works perfectly.
I’m guessing the driver has to parse the indices in order to find the min/max index counts. If the index buffer is in video memory, it has to read back from video memory, which is awfully slow.
I never tried, but maybe a function like glDrawRangeElements, to which you already give the min/max index counts, wouldn’t need to do that, hence performance increase, and not drop. Has anybody tested that?
