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I run to a really odd problem while trying to generate vertex arrays with openGL. I am using windows 7 as platform, and I am using GLEW 1.15 and glm as the openGL libraries with SDL as the interface. The problem was that while trying to generate the vertex arrays using

    glGenVertexArrays(1, &m_vertexArrayObject);

I came across with the following access violation error

Unhandled exception at 0x7469CB49 in OpenGL.exe: 0xC0000005: Access violation executing location 0x00000000.

I am sure that I initialized GLEW correctly and set the glewExperimental as true before calling any GLEW functions

glewExperimental = GL_TRUE;
GLenum status = glewInit();

After running the getInfo.exe I found out that the genVertexArrays commmand was MISSING from GLEW I had installed to my PC. I then suspected I had a GPU or drivers problem which I chased down and found out that my PC was running with Mobile Intel(R) 4 Series Express Chipset Family Graphics card with a CPU Intel Centrinto 2 - yes my PC is old.

I tried downloading drivers that support openGL version 4.5 or older but I couldn't find any that are supported from my CPU.

Does anyone know a way to go around this problem and make use of the glgenVertexArrays command with old or unsupported hardware? Maybe a command from older versions of openGL that produces the same result as glGenVertexArrays would be a really good help !

P.S I made sure to download the latest version of openGL. glGetString(GL_VERSION) returns Version 2.1.0 - Build 8.15.10.1840, which is not the one I've installed.

Chrysostomos
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  • Are you using glew? If so, this might cause an issue: http://stackoverflow.com/questions/8302625/segmentation-fault-at-glgenvertexarrays-1-vao – MalaKa Sep 09 '15 at 10:43
  • I've tried to initialise glew but didn't work. I used the two lines of code just before the execution of the line.. ;/ – Chrysostomos Sep 09 '15 at 11:08
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    Can you precise which libraries you are using, which platform you work on and show the code which initializes OpenGL and creates a GL context ? – VB_overflow Sep 09 '15 at 11:31
  • I've edited the question – Chrysostomos Sep 09 '15 at 12:06
  • I've also moved the initialization of GLEW before the creation of context – Chrysostomos Sep 09 '15 at 13:17
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    *Does anyone know a way to go around this problem and make use of the genVertexArrays command with old or unsupported hardware?* - the point of "unsupported" hardware is that it **is not supported**. Weird, innit? You could create your own sort-of polyfill for that, but it would be probably cheaper overall to just buy a newer development PC. In the long run, if you'll want advanced features, you'll need an advanced GPU. – Bartek Banachewicz Sep 10 '15 at 10:07

0 Answers0