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| openGL custom blendmodes |
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fuzinavl
Member #4,105
December 2003
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Is there a way to define a blendmode which will combine these 2 operations? Rgba color(1.0f,1.0f,1.0f,opacity); Canvas::SetTo( *los_buffer ); Canvas::SetPixelWriteMode( COLOR_ONLY ); Blenders::Set( ADDITIVE_BLENDER ); ol::Ellipse( x,y,radius,radius).DrawArc( color, angle + arc/2, arc,0.0,0.0); Canvas::SetPixelWriteMode( ALPHA_ONLY ); glBlendFunc(GL_ZERO,GL_SRC_COLOR); //multiplicative_blender ol::Ellipse( x,y,radius,radius).DrawArc( color, angle + arc/2, arc,0.0,0.0); Canvas::SetPixelWriteMode( COLOR_AND_ALPHA ); //restore default mode
I want to additively combine RGB components, and multiplicatively combine alpha components. __________________________ |
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Bob
Free Market Evangelist
September 2000
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Quote: I want to additively combine RGB components, and multiplicatively combine alpha components. See EXT_blend_func_separate or OpenGL 1.4. -- |
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fuzinavl
Member #4,105
December 2003
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Thanks! __________________________ |
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