Question

我可以在此法典中阐明背景,并补充一点:

gl.glEnable(GL10.GL_DEPTH_TEST);    
gl.glClearColor(0.0f, 0.25f, 0.35f, 1.0f);
gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

如何改变这种状况,以便有一个线性梯度的背景? e.g. 底色和蓝色的白色颜色?

Answer 1

没有任何办法可以向梯度清除,但我只提一个有色的块,而不是清除颜色:

void drawFrame() {
   glDisable(GL_DEPTH_TEST);
   //draw screen aligned quad with color gradient 
   //    (top two vertices white, bottom two blue)
   drawGradientQuad();

   glClear(GL_DEPTH_BUFFER_BIT); //no need to clear color

   glEnable(GL_DEPTH_TEST);
   //draw rest of scene
}

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