问题描述
我想在shader-storage-buffer中存储一些粒子。我使用glMapBufferRange（）函数设置粒子值，但是每当调用这个函数时，我总是得到一个Access Violation错误。
I want to store some particles in a shader-storage-buffer. I use the glMapBufferRange() function to set the particles values but I always get an Access Violation error whenever this function is called.
glGenBuffers(1, &bufferID);
glBindBuffer(GL_SHADER_STORAGE_BUFFER, bufferID);
glBufferData(GL_SHADER_STORAGE_BUFFER, numParticles*sizeof(Particle), NULL ,GL_STATIC_DRAW);
struct Particle* particles = (struct Particle*) glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, numParticles*sizeof(Particle), GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
for(int i = 0; i < numParticles; ++i){
//.. Do something with particles..//
}
glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
当我使用glMapBuffer（）代替，一切正常。我已经确定我已经创建了一个与glfw和初始化glew正确的OpenGL上下文。
When I use glMapBuffer() instead, everything works fine. I already made sure that I have created an OpenGL context with glfw and initialized glew properly.
推荐答案
。当我设计我的GLFW-Window类时，我使用GLFW_OPENGL_FORWARD_COMPAT提示来创建一个向前兼容的OpenGL上下文。我不知道为什么我这样做，但是当我不使用这个提示一切工作正常。 ：）
Ok, I finally found the problem. When I designed my GLFW-Window class I used the GLFW_OPENGL_FORWARD_COMPAT hint to create a forward-compatible OpenGL context. I don't know why I did this, but when I don't use this hint everything works fine. :)
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