黑色屏幕上安东的OpenGL你好三角教程 [英] Black screen on Anton's OpenGL Hello Triangle Tutorial

问题描述

我刚接触OpenGL，并开始使用 Anton的OpenGL 教学课程学习。
我完成了Hello Triangle教程，并使用以下g ++命令编译了它：

I'm new to OpenGL and started studying using Anton's OpenGL tutorials. I finished the "Hello Triangle" tutorial and compiled it without errors with the following g++ command:

g++ -o hello_triangle main.c -lGLEW -lglfw -lGL -lX11 -lXxf86vm -lXrandr -lpthread -lXi -lm

但是，系统窗口只会在我的代码和图书库的代码中显示黑色屏幕>。

However, the system window shows only a black screen, both in my code and in the code from the book repository.

glGetString（GL_RENDERER）和glGetString（GL_VERSION）的输出如下：

The output from glGetString(GL_RENDERER) and glGetString(GL_VERSION) is the following:

Renderer: Mesa DRI Intel(R) Sandybridge Mobile  
OpenGL version supported 3.0 Mesa 11.0.6

这个黑屏的原因是什么？

What might be the reason of this black screen?

如果你想检查代码，看看'00_hello_triangle'代码。 / p>

If you want to check the code just look at the '00_hello_triangle' code.

推荐答案

As @ gnimuc-key建议，当我改变着色器代码的版本时，

As @gnimuc-key suggested, when I changed the version in the shaders code, both vertex and fragment shader, it worked:

const char* vertex_shader =
    "#version 130\n"
    "in vec3 vp;"
    "void main () {"
    " gl_Position = vec4 (vp, 1.0);"
    "}"; 

const char* fragment_shader =
    "#version 130\n"
    "out vec4 frag_colour;"
    "void main () {"
    " frag_colour = vec4 (0.5, 0.0, 0.5, 1.0);"
    "}"; 

我将#version 150更改为#version 130并正常工作

I changed "#version 150" to "#version 130" and worked properly

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