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anddev.org • View topic - Floating point alternative?

Floating point alternative?

Problems with Canvas, OpenGL, etc...

Floating point alternative?

Postby SilverLogic » Fri Oct 22, 2010 7:40 am

I've written an obj model loader in opengl es, and the native format is floating point variables. Right now the model is loaded into float buffers and then passed to opengl. I know that these phones don't have floating point processors so this can be detrimental to performance, and I've noticed when loading files over 100kb it can take a few seconds. I want to increase the performance but a little unsure as to what data type would be most efficient, and still be opengl friendly. I know this is simple question but I've always been able to work with floating points. I think i can use a doublebuffer, but is this the most efficient way? Also, when passing this buffer to opengl, I assume ill have to change the type from GL_FLOAT? Any input on the matter would be appreciated :D
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Re: Floating point alternative?

Postby mark@project8games.com » Fri Oct 22, 2010 5:05 pm

Check out this thread, towards the bottom. I think your problem might actually be the floatbuffers themselves.

android-2d-3d-graphics-opengl-problems-f55/updating-a-vbo-t17606.html

You may want to try one of the mentioned solutions before switching to GL_FIXED for all your stuff.
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