Topic Title: Developing With 3D Textures Viewed Along X Axis
Topic Summary: Using OpenGL glTexImage3D. Planes of Y,Z stacked Along X. Very Slow
Created On: 06/21/2013 10:49 AM
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 06/21/2013 10:49 AM
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BrainDump
Peon

Posts: 2
Joined: 06/21/2013

Hello.

Using Sapphire HD 7950 for Mac Pro, 3GB.  OS X 10.8.  OpenGL concepts at OpenGL 2.1, GLSL 1.20.

We have an application that has 1024 planes of geometry and establishes planes of geometric and texture coordinates.  The Y,Z dimensions are 512 and 256.  When viewed along Y or along Z, the performance (moving the display around with mouse, etc.) is great.  But when these planes are established along the X plane, it slows greatly.

The technique we are using is similar to what is described here http://content.gpwiki.org/index.php/OpenGL:Tutorials:3D_Textures

My question: is this a known limitation of this board, or ATI boards in general?  Possibly a problem with Macintosh drivers?  It seems to work fine on a different board with less memory running on a Linux system.  Also, if we use much smaller stacks (300 or so) it works smoothly.

If you need simplified code to diagnose this, please let me know.



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3D Graphics...take a closer look.
 06/21/2013 01:45 PM
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Eydee
Ninja Zombie Killer

Posts: 4843
Joined: 12/27/2008

You're at the wrong place. You should post things like that here. And if you need to talk to AMD directly, talk to them directly, not through forums.



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 06/21/2013 02:22 PM
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BrainDump
Peon

Posts: 2
Joined: 06/21/2013

Sorry for mis-posting.  Thanks for directing me to the right place.



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3D Graphics...take a closer look.
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