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Blend function

Started by ChristophR Aug 24, 2006 at 7:22 AM 1 replies 800+ views

Original Post

Aug 24, 2006 at 7:22 AM

Hi! I need to change the blend operation from ADD (it's obviously the default settings) to MIN. Therefore I am looking for an OpenGL function which is equivalent to Direct3D's SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_MIN). Can anybody help me? Thanks in advance! rgds

win_crook

Aug 24, 2006 at 7:29 AM

I haven't used DX but I think this is what you are looking for.

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

Yann L

219

Yann L

Aug 24, 2006 at 9:05 AM

No, what you want is this:

glBlendEquation(GL_MIN);

The default is GL_FUNC_ADD. This function is available from OpenGL 1.2 on upwards. Under Windows, you'll have to use the EXT_blend_minmax extension.

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