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opengl in c
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I am trying to figure out how to program opengl using C. I want this to be easy to port over to other Operating systems so Objective C will not work. Does anybody have any experience in setting up opengl/glut in OSX for use in C? I can't seem to get anything to work.
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Originally posted by Altair:
I am trying to figure out how to program opengl using C. I want this to be easy to port over to other Operating systems so Objective C will not work. Does anybody have any experience in setting up opengl/glut in OSX for use in C? I can't seem to get anything to work.
OpenGL is all natively C code. Most of the examples out there should be C. You could always download the Quake 2 Source code too, since it's all C/OpenGL.
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To be precise, rendering OpenGL content is done in C. But you first have to create some sort of window to render INTO, and that might be in C/C++ (Carbon, GLUT) or Obj-C (Cocoa). The GL core does not know anything about the windowing system, so you have to pick an interface (NSGL/AGL/CGL). GLUT uses Cocoa underneath, btw.
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Thank you, this is exactly what i needed! 
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I tried doing the above tutorial but i get the same error that i was having earlier:
gltutorial:0: Undefined symbols: _glClear _glViewport _glutCreateWindow _glutDisplayFunc _glutIdleFunc _glutInit _glutInitDisplayMode _glutInitWindowSize _glutMainLoop _glutPostRedisplay _glutReshapeFunc _glutSwapBuffers
Anybody have a clue on what is causing this?
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Those are linker errors complaining that GL functions can't be found. You have to link against the GL framework. In Xcode, add the framework to your project. Or in a makefile, "-framework OpenGL".
Keith shows this in his seventh screenshot in the tutorial.
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Originally posted by arekkusu:
Those are linker errors complaining that GL functions can't be found. You have to link against the GL framework. In Xcode, add the framework to your project. Or in a makefile, "-framework OpenGL".
Keith shows this in his seventh screenshot in the tutorial.
Thank you. The gcc command is what i needed. For some reason xCode didn't register the frameworks or something. Also I found out that you have to include the Cocoa framework as well.
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