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Index › Discussion › Exhibition › gl vertexarray experiment

pelintra Ex Member	gl vertexarray experiment Sep 21st, 2008, 7:48pm   hi. just made an experiment on opengl vertex arrays and thought i would share as it is a good way to speed things up. http://rui-m.com/p5/particulas220000/

memo Ex Member	Re: gl vertexarray experiment Reply #1 - Sep 21st, 2008, 11:19pm   wow thats amazing! how many particles is that? are the particle updates running on the gpu?

pelintra Ex Member	Re: gl vertexarray experiment Reply #2 - Sep 22nd, 2008, 2:09am   hi memo. thats 220000 particles. no, the particles are being updated on the cpu. i'm just writing the particle positions into a floatbuffer and using glDrawArrays on that. thats it. it made for a big speed boost, and its really simple!

pyramind Junior Member Offline Posts: 50	Re: gl vertexarray experiment Reply #3 - Sep 22nd, 2008, 3:04am   Ah amazing... As usual. Thanks for sharing this clean implementation!
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jeffg Senior Member Offline Posts: 472	Re: gl vertexarray experiment Reply #4 - Mar 25th, 2009, 9:27pm   That's awesome  I tested it with a 1,000,000.  Dropped it to 10 FPS but it worked.  I'm looking for all the speed I can muster, so this will be a nice example to consider.

Powder YaBB Newbies Offline Posts: 9	Re: gl vertexarray experiment Reply #5 - Mar 26th, 2009, 12:09am   This is great! Runs really fast...

Milind YaBB Newbies Offline Posts: 15	Re: gl vertexarray experiment Reply #6 - Mar 26th, 2009, 9:13am   Wow!! it runs wonderfully.
	Milind&&http://milindshastri.googlepages.com/

clankill3r Full Member Offline Posts: 210 Netherlands	Re: gl vertexarray experiment Reply #7 - Mar 26th, 2009, 2:29pm   this one is still one of the best things I saw

jeffg Senior Member Offline Posts: 472	Re: gl vertexarray experiment Reply #8 - Mar 26th, 2009, 3:32pm   I'm trying to understand how to use this technique in combination with a texture.  Seems you would use glTexCoordPointer but I'm not sure how to format it.  I'm currently using a "gl.glTexCoord4f(x, y, z, 60 );" along with drawing a square "gl.glCallList( square );" within a GL_QUADS call.