如何使用openGL的golang绑定定义gl.DrawBuffers COLOR_ATTACHMENTi

问题描述：

Using "github.com/go-gl/gl/v4.5-core/gl" the golang bindings for setting the array of color_attachments is as follows:

// Specifies a list of color buffers to be drawn into
func DrawBuffers(n int32, bufs *uint32) {
    C.glowDrawBuffers(gpDrawBuffers, (C.GLsizei)(n), (*C.GLenum)(unsafe.Pointer(bufs)))
}

In c++ you would do this like:

// Set "renderedTexture" as our colour attachement #0
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, renderedTexture, 0);

// Set the list of draw buffers.
GLenum DrawBuffers[1] = {GL_COLOR_ATTACHMENT0};
glDrawBuffers(1, DrawBuffers); // "1" is the size of DrawBuffers

I can't for the life of me figure out how you are expected to pass an array of buffers to this and any help would be appreciated.

使用“ github.com/go-gl/gl/v4.5-core/gl”的golang绑定设置color_attachments数组如下： p>

  //指定要绘制到的颜色缓冲区列表
func DrawBuffers（n int32，bufs * uint32）{
 C  .glowDrawBuffers（gpDrawBuffers，（C.GLsizei）（n），（* C.GLenum）（unsafe.Pointer（bufs）））
} 
  code>  pre> 
 
 在 c ++，您可以这样操作： p> 
 
 
  //将“ renderedTexture”设置为我们的颜色附件＃0 
glFramebufferTexture（GL_FRAMEBUFFER，GL_COLOR_ATTACHMENT0，renderedTexture，0）; 
 
 /  /设置绘制缓冲区的列表。
GLenum DrawBuffers [1] = {GL_COLOR_ATTACHMENT0}; 
glDrawBuffers（1，DrawBuffers）;  //“ 1”是DrawBuffers的大小
  code>  pre> 
 
 我一辈子都无法弄清楚如何将缓冲区数组传递给它 ，我们将不胜感激。 p> 
  div>

答

Pass a pointer to the first element: gl.DrawBuffers(int32(len(attachments)), &attachments[0]). I hope this answers your question.

Full example: https://github.com/Kugelschieber/go-game/blob/e88c16372587ddb958753bf70fde9de4babf65df/fbo.go

如何使用openGL的golang绑定定义gl.DrawBuffers COLOR_ATTACHMENTi

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