hello there i was wondering if any one can shed some light on any ability to set the clear color in opengl to transparent, istead of a color like black or whatever.
glClear always fills the framebuffer with the values given in glClearColor (well, converted to fixed point for non-float buffers of course), there is no “transparent” rendering in a glClear.
If you want to fade out your renderering you need to skip the color clear and render a transparent rectangle over your current frame’s contents instead.
Beware that SwapBuffers leaves the back buffer in undefined state for pixelformats with PFD_SWAP_EXCHANGE flag set.
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