问题
I have a question with alpha blending in openGL...
I've tried some stuff for drawing transparent objects... I've seen a nice (ideal) result by disabling GL_DEPTH_TEST before drawing the transparent faces and re-enable GL_DEPTH_TEST again back after drawing the transparent face...
Obviously I've noticed that depending on the order that I draw the different faces I got a result or another...
However I've decided simply to draw solid faces first with GL_DEPTH_TEST enabled and after the transparent faces with GL_DEPTH_TEST disabled...
So, obviously if I draw transparent faces with GL_DEPTH_TEST disabled I see transparent faces which are inside, (for example a cube), then
So, my question is... Is this correct? Does OpenGL have a "magic" way to order the opaque and transparent faces automaticly?
回答1:
Does OpenGL have a "magic" way to order the opaque and transparent faces automaticly?
No. You must sort transparent objects yourself. Or you can use an order-independent transparency algorithm. There are several available, but none of them are "magic" and most of them take up lots of performance.
回答2:
Despite it is not the ideal result I got nice results by drawing first opaque faces and then transparent faces...
来源：https://stackoverflow.com/questions/6352908/opengl-transparency-translucency