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Zeno
02-10-2000, 08:58 PM
I've been working on a simple OpenGL game under Linux (TNT2) for about three months now, when I get time. I use a transparent texture-mapped cone for thrust on my ships. The texture map is algorithmically generated, and replaced once per frame when it is on with glTexSubImage. Unfortunately, this texture SOMETIMES appears garbled. I will see if inserting HTML works here, to show you the pictures. If not I hope the tag will at least appear as text. Here is the way it looks when garbled:
http://www.physics.ohio-state.edu/~wade/bad.jpeg
And here is how it should look:
http://www.physics.ohio-state.edu/~wade/good.jpeg

Does anyone know why this might happen? I wanted to ask here before I rip the code up, since I've tried a lot of things with no definitive answer. It is affected by the dimensions I make the texture map, whether the ship's shield is on or not (that's the variable in the pictures), which ship is drawn first, etc. I have tried pushing and popping all lighting attributes, but that didn't seem to help. Any ideas would be greatly appreciated http://www.opengl.org/discussion_boards/ubb/smile.gif

Thanks,
Wade

Gorg
02-11-2000, 08:59 AM
might be something else, but are you real sure that your texture map is ALWAYS correctly created?