can't get glGenVertexArrays to work.

sobeit · 2013-04-15T20:39:07

hi all, I'm learning GLSL recently, and trying to use vertex array object. but I just can't get things right. I use glew for OpenGL setup, and use vertex array to bind vertex attributes. while the compiler doesn't show any complaint, the output doesn't show anything neither. I try to use glsldevil to debug my shader program. it turns out that every time when the program comes to execute glGenVertexArrays(1, m_vao), the error message window pops up saying the program xxxx.exe has stopped working. Show I assume that I did something wrong with glGenvertexArrays. below is the snippet of my code, how am i gonna fix this? Thanks in advance. glGenBuffers(1, &m_vertBO); glGenBuffers(1, &m_indexBO); glGenVertexArrays(1, &m_vao); //vertex array============================= glBindVertexArray(m_vao); //pass in vertex data glBindBuffer(GL_ARRAY_BUFFER, m_vertBO); glBufferData(GL_ARRAY_BUFFER, sizeofvertdata, tempVertData, GL_STATIC_DRAW); //pass in index data glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBO); glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeofindexdata, tempIndexData, GL_STATIC_DRAW); //vertex data glEnableVertexAttribArray(vertLoc); glVertexAttribPointer(vertLoc, 3, GL_FLOAT, GL_FALSE, 0, 0); //texture data if (objmodel.hasTexCoord()) { glEnableVertexAttribArray(texCoordLoc); glVertexAttribPointer(texCoordLoc, 2, GL_FLOAT, GL_FALSE, 0, (void *)(objmodel.texCoordOffset())); } //normal data if (objmodel.hasNormal()) { glEnableVertexAttribArray(normLoc); glVertexAttribPointer(normLoc, 3, GL_FLOAT, GL_FALSE, 0, (void *)(objmodel.normalOffset())); } //unbind vertex array object glBindVertexArray(0); //unbind vertex and index buffer object glBindBuffer(GL_ARRAY_BUFFER, 0); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

Graphics and GPU Programming Programming OpenGL

Started by sobeit April 15, 2013 09:20 AM

9 comments, last by sobeit 11 years ago

sobeit

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April 15, 2013 08:39 PM

Do you test these just after creating your context or just before calling glGenVertexArrays? If the former I'd suggest moving to the latter and re-checking; I suspect that your program is going back to the Intel at some point in it's execution.

I did the both and the results are the same. I think I did some setting configuration back then making the NVIDIA the default graphics card.

can't get glGenVertexArrays to work.

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can't get glGenVertexArrays to work.

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