transparency with alpha channel

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Started by leblebi June 28, 2001 06:29 AM

0 comments, last by leblebi 22 years, 10 months ago

124

Author

June 28, 2001 06:29 AM

Im trying to implement half-life like ladders, windows, detailed objects etc. using alpha channel transparency.(I need holes in the textures). If I create two different textures both RGB, I can do it. But when I try to utilize the alpha channel, I fail. Does anyone know how to implement this using OpenGL?

Lord Karnus

122

June 28, 2001 02:43 PM

try this :

  	glEnable(GL_BLEND);	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

Note that when you load the image with the alpha channel, you must make sure that the third parameter in glTexImage2D matches
your format (in the case of a 32bit alpha channel .tga that would be GL_RGBA8)

Feel free to email me.

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