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POpyopengl framebuffer
 

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  1. POpyopengl framebuffer
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    <p>I'm trying to work with framebuffer objects in PyOpenGL and have found some tutorials to teach myself. I'm working on a WinXP machine with Python 2.7.3 and I just installed the binary distributions of PyOpenGL 3.0.2 and PyOpenGL-accelerate 3.0.2. However, directly at the beginning I encounter a problem, in the sense that I get the error message that the fbo functions don't seem to exist. These are the steps to recreate my problem:</p> <p>Importing the modules:</p> <pre><code>from OpenGL.GL import * from OpenGL.GLU import * from OpenGL.GL.framebufferobjects import * </code></pre> <p>I now should have the framebuffer objects/functions available to me.</p> <pre><code>print glGenFramebuffers print glBindFramebuffer </code></pre> <p>shows </p> <pre><code>&lt;OpenGL.extensions.glGenFramebuffers object at 0x03172260&gt; &lt;OpenGL.extensions.glBindFramebuffer object at 0x03172120&gt; </code></pre> <p>However, if I try to call (make an instance) of this object, as specified in the tutorial, with:</p> <pre><code>fbo = glGenFramebuffers(1) glBindFramebuffer(GL_FRAMEBUFFER, fbo ) </code></pre> <p>I get the error:</p> <pre><code>Traceback (most recent call last): File "&lt;stdin&gt;", line 1, in &lt;module&gt; File "latebind.pyx", line 31, in OpenGL_accelerate.latebind.LateBind.__call__ (src\latebind.c:645) File "C:\Python27\lib\site-packages\OpenGL\extensions.py", line 189, in finalise self.__name__, OpenGL.error.NullFunctionError: Attempt to call an undefined alternate function (glGenFramebuffers, glGenFramebuffersEXT), check for bool(glGenFramebuffers) before calling </code></pre> <p>using</p> <pre><code>bool(glGenFramebuffers) </code></pre> <p>indeed returns False.</p> <p>What am I doing wrong? Shouldn't all the required framebuffer libraries be installed with the binaries of PyOpenGL(-accelerate)?</p> <p>Thanks in advance to anyone who can help me.</p> <p>EDIT: I just found <a href="https://stackoverflow.com/questions/12953134/problems-with-frame-buffer-objects-fbos-in-pyopengl">https://stackoverflow.com/questions/12953134/problems-with-frame-buffer-objects-fbos-in-pyopengl</a>, with a similar problem, but no solution</p>
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    1. USDaniel Schreij
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    1. COCan you link the tutorials?
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    2. COhttp://pyopengl.sourceforge.net/context/tutorials/shadow_2.xhtml or http://www.opengl.org/wiki/Framebuffer_Object_Examples#Quick_example.2C_render_to_texture_.282D.29 or http://bazaar.launchpad.net/~mcfletch/openglcontext/trunk/view/head:/tests/shadow_2.py
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