透明质感的OpenGL ES的Andr​​oid版 [英] Transparent texture in OpenGL ES for Android

问题描述

我想设定一个纹理的透明度在OpenGL四，与混合功能的发挥并没有​​帮助也没有对谷歌任何东西。有什么建议？

I'm trying to set the transparency of a texture on a quad in opengl, playing with the blend functions didn't help neither did anything on google. Any suggestions?

推荐答案

我也有类似的问题，采用一体成型的code表示工作正常，另一个没有。大量的日志记录和调试后，我发现，差异有一行code。

I had a similar problem, with one piece of code that worked correctly and another that didn't. After a lot of logging and debugging, I found that the difference was one line of code.

在code，它已经工作阿尔法，我在呼唤我的设置渲染之前，下面的。

In the code that had working alpha, I was calling the following before setting my renderer.

    setEGLConfigChooser(false)

如果这样做没有帮助，这里有几个其他的指针...

If that doesn't help, here are a couple of other pointers...

请确保您启用了混合的在的加载纹理。

Make sure that you've enabled blending before you load the texture.

例如：

    // Enable blending using premultiplied alpha.
    gl.glEnable(GL10.GL_BLEND);
    gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE_MINUS_SRC_ALPHA);

...，并确保您使用的实际生成纹理位图有一个alpha组成部分。

...and make sure that the bitmap that you're using to generate the texture actually has an alpha component.

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