为什么我的彩色立方体不能与GL_BLEND一起使用？ [英] Why does my colored cube not work with GL_BLEND?

问题描述

当我使用GL_BLEND时，我的多维数据集未按预期呈现。

  glEnable（GL_CULL_FACE）; 
 glEnable（GL_BLEND）; 
 glBlendFunc（GL_SRC_ALPHA，GL_ONE）; 
  

我也有一个类似的问题，在前面绘制一些半透明的顶点，

相关：的代码，以及用于实际绘制立方体。

正在绘制的立方体如下：

  glClear（GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT）; 
 
 glPushMatrix（）; 
 glLoadIdentity（）; 
 
 // ...做一些翻译，旋转等... 
 
 drawCube（）; 
 
 glPopMatrix（）; 
 
 // ...交换缓冲区... 
  

方案

您可以在绘制多维数据集之前尝试禁用所有照明：

  glDisable（GL_LIGHTING） 
  

My cube isn't rendering as expected when I use GL_BLEND.

glEnable(GL_CULL_FACE);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);

I'm also having a similar problem with drawing some semi-opaque vertices in front, which could well be related.

Related: Why do my semi-opaque vertices make background objects brighter in OpenGL?

Here's what it's supposed to look like:

And here's what it actually looks like:

Please see the code used to create the colored cube, and the code used to actually draw the cube.

The cube is being drawn like so:

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glPushMatrix();
glLoadIdentity();

// ... do some translation, rotation, etc ...

drawCube();

glPopMatrix();

// ... swap the buffers ...

解决方案

You could try disabling all lighting before drawing the cube:

glDisable(GL_LIGHTING);

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