Hi Everyone,
I'm trying to control transparency of a subgraph from a high level, and I though BlendFunc with BlendColor would be a good way to go. Setting up the two with constant color = (1, 1, 1, opacity_scale) and BlendFunc = (GL_CONSTANT_ALPHA, GL_ONE_MINUS_CONSTANT_ALPHA) allows me to adjust the opacity_scale value effecting all frags below. The problem is that it overrides the source color's alpha. The above equates to sfactor = aC dfactor = 1-aC D = ( S * aC + D *(1-aC) ) The equation I really want would give sfactor = aS*aC dfactor = 1 - aS*aC Does anyone know if a setup like that is even possible? Thanks, Chase
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