简单的透明 OpenGL中的绝大多数特效都与某些类型的(色彩)混合有关。混色的定义为，将某个象素的颜色和已绘制在屏幕上与其对应的象素颜色相互结合。至于如何结合这两个颜色则依赖于颜色的alpha通道的分量值，以及/或者所使用的混色函数。Alpha通常是位于颜色值末尾的第4个颜色组成分量。-A simple and transparent in the vast majority of OpenGL effects are related to certain types of (color) Mixed relevant. Blending is defined as the particular pixel color and have drawn on the screen with its corresponding pixel color of each other. As for how to combine these two colors will depend on the color of the alpha channel of the sub-value, and/or used by the blending function. Alpha is usually located at the end of the color values of the first four components of the color composition.