OpenGL透明/半透明 [英] OpenGL transparency/translucency

问题描述

我对openGL中的Alpha混合有疑问...

I have a question with alpha blending in openGL...

我已经尝试了一些用于绘制透明对象的东西...通过在绘制透明面之前禁用GL_DEPTH_TEST并在重新绘制透明面之后重新启用GL_DEPTH_TEST，我看到了一个不错的(理想)结果...

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...

很明显，我注意到，根据绘制不同面孔的顺序，我会得到结果或其他结果.

Obviously I've noticed that depending on the order that I draw the different faces I got a result or another...

不过，我决定先在启用GL_DEPTH_TEST的情况下绘制立体面，然后在禁用GL_DEPTH_TEST的透明面后进行绘制...

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...

因此，很明显，如果我在禁用GL_DEPTH_TEST的情况下绘制透明面，我会看到里面的透明面(例如一个立方体)，然后

So, obviously if I draw transparent faces with GL_DEPTH_TEST disabled I see transparent faces which are inside, (for example a cube), then

所以，我的问题是...这是正确的吗? OpenGL是否具有魔术"方式来自动排序不透明和透明的面?

So, my question is... Is this correct? Does OpenGL have a "magic" way to order the opaque and transparent faces automaticly?

推荐答案

尽管这不是理想的结果，但我先绘制不透明的面孔然后再绘制透明的面孔还是得到了不错的结果...

Despite it is not the ideal result I got nice results by drawing first opaque faces and then transparent faces...

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