OpenGL Dynamic Cube Map - Tilted Forum Project Discussion Community

Rekna · 09-18-2004, 11:45 PM

Anyone ever do a dynamic cube map to do enviornment mapping in openGL before? I'm curious how I would go about generating the cubemap textures. Do I render the scene once without my object I want to put the texture on then take 6 pictures (one on each axis fov 90). Then rerender the scene for actual drawing?

Also I know the function I need to use to get the textures from the frame buffer but how do I actually get the scene to write to the frame buffer so I can take the picture?

DewMan · 09-20-2004, 09:46 AM

Yes. If you want dynamic cube textures, you render each face and save off the texture.

NOTE: You could probably get away with reusing the cube for multiple frames. Maybe even rendering only one side each frame cycling through which side is rendered each frame, and reusing the other 5.

09-18-2004, 11:45 PM	#1 (permalink)
Rekna Junkie	OpenGL Dynamic Cube Map Anyone ever do a dynamic cube map to do enviornment mapping in openGL before? I'm curious how I would go about generating the cubemap textures. Do I render the scene once without my object I want to put the texture on then take 6 pictures (one on each axis fov 90). Then rerender the scene for actual drawing? Also I know the function I need to use to get the textures from the frame buffer but how do I actually get the scene to write to the frame buffer so I can take the picture?

09-20-2004, 09:46 AM	#2 (permalink)
DewMan Upright Location: Salt Lake City	Yes. If you want dynamic cube textures, you render each face and save off the texture. NOTE: You could probably get away with reusing the cube for multiple frames. Maybe even rendering only one side each frame cycling through which side is rendered each frame, and reusing the other 5.