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GL_PRIMARY_EXT, GL_CONSTANT_COLOR_EXT

Started by WarAmp Jun 29, 2001 at 2:16 PM 2 replies 1.2k views

Original Post

Jun 29, 2001 at 2:16 PM

hey again all. One more question: What do GL_PRIMARY_EXT, and GL_CONSTANT_COLOR_EXT represent? (env_combine extention) the spec says that GL_PRIMARY is the primary color, but what exactly does that mean? is it the vertex color, the vertex color times the texture color? Im confused. Similarily, what is GL_CONSTANT_COLOR? thanx again for your help. Waramp.

Serge K

Jun 30, 2001 at 5:40 PM

GL_PRIMARY_EXT == vertex color

GL_CONSTANT_COLOR_EXT has nothing to do with GL_EXT_texture_env_combine,
it''s from GL_EXT_blend_color.

WarAmp

Jul 1, 2001 at 12:32 AM

Thanx for the reply. I meant GL_CONSTANT_EXT, not GL_CONTANTS_COLOR_EXT, but the spec says Texture Environment Color, so I''m assuming it means the glTexEnv(..., GL_TEXTURE_ENV_COLOR, ...) value?

Is this right?

Thanx.
Waramp.

Serge K

Jul 1, 2001 at 12:51 AM

Yes,
this extension uses texture environment color as constant color.

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