Alpha blending textures vs framebuffer

Original Post

Mar 25, 2006 at 1:09 PM

Hello, I want to render transparent glass with opengl. Should I use alpha blending on the textures or in the framebuffer. I don't know what the advantages are of both techniques. Does alphablending in the framebuffer require sorting of the geometry? Thankx, Jeroen

zedzeek

Mar 25, 2006 at 2:48 PM

u will prolly need to sort geometry back to front. + have the translucency factor in the glass (not the framebuffer) many ways of blending eg GL_SRC_ALPHA ONE_MINUS_SRC_ALPHA or a constant blend color, u will need to experiment. also u might wanna have reflection + refraction (which require more work) theres numerous demos/examples on the net.

godmodder

Mar 26, 2006 at 4:10 AM

Yes, but codesamplers.com has a tutorial on blending in the framebuffer, and they don't seem to do any sorting in it...

Topic Locked