Hi !

I have a little perfomance problem with my App. It tries
to paint 500 Sprites with the help of jogl. The Problem is the FPS. It get's only 70-80 FPS on my GF2. I asked kevglass to check it, on his 9000 mobilit he gets 250. What's wrong? And yes, i switched off vsync and i reinstalled the nvidia driver.

Could someone test this :

http://www.informatik.uni-oldenburg.de/~troggan/bodo/JOGLTest.zip

It's an NForce chipset. I checked and it's a GF2 MX.
Is that the reason for the speed of the game?

thanks in advance for looking at the source. i hope you will find a way to speed it up a little bit. i don't want to buy a new card to be able to code that game   :-/

When you say its a GF2 MX above, you also say its an NForce chipset. From what I understand (lets face it, not much), NForce is a motherboard chipset. Are you refering to an "onboard" graphics processor that is GF2?

If so, I suspect you're performance would be pretty dire.

Incidently, I looked at your code before, it all looked fine. I also ran it on my 9000 Mobility, and got decent frame rates, so I'm guessing its your hardware...  (possibly a driver update?)

Kev

Just out of curiosity, how is 70-80 fps bad? I mean, it's not jerky, right?  

Hrm.  Are you sure VSync isn't messing you around?  Cut the number of sprites down to 10 or so and run again - if you still get the same frame rate with significantly fewer sprites, you may have a VSync problem.

A GeForce2 MX should be able to push out a lot more sprites than 500 - if done correctly!  Comments:

Unnecessary loadIdentity() call per sprite: You do a loadIdentity()/translatef() for every sprite rendered.  Try using pushMatrix()/popMatrix() instead.  Even better, don't do the translate but render the sprite at the correct x,y coordinates straight off.

Unnecessary texture changes: You rebind the OpenGL texture object for every sprite rendered.  Try sorting the sprites into "same texture" groups and bind the texture only once for each group.  At the very least just track the last texture you rendered and don't bind the new one if it's the same as the old. (Sample code only uses one texture.)

Float vertices: You're casting all your vertices from ints to floats - why not keep them as ints and use the vertex2i() call?  Let the OpenGL driver decide what's fastest. (Very minor issue.)

Thanks for the help !

Yes, I switched off VSync. If I only Draw 1 Sprite, it goes up to 250 (but thats very slow, too ).

I have added all your changes to my code, but I have received only 5 Fps more . Do you have an Example on how   to do this the right way? And are you sure that a GF2 MX should be faster than this??

troggan

Btw: Bought a new Card, runs like hell on it

I switch it off in the Control Panel. Don't know why it doesn't switch it off in your case, but the 250fps proves, that it works for me

troggan