Hello,
I came across a problem and hope that you can help me,
I was trying to run some examples to visualize OpenCL
calculations with OpenGL with shared buffers using
Python 3.3
PyOpenGL 3.1.0
PyOpenGL-accelarate 3.1.0
pyopencl 2014.1
The examples are similar to that one:
https://gitorious.org/openclgltest/openclgltest
Trying to run this throws the error:
Traceback (most recent call last):
File ".\testpyopengl.py", line 234, in <module>
mytest = test()
File ".\testpyopengl.py", line 91, in __init__
self.loadclData()
File ".\testpyopengl.py", line 205, in loadclData
self.arr_cl = cl.GLBuffer(self.ctx, mf.READ_WRITE,
int(self.arrvbo.buffers[0]))
File "vbo.pyx", line 177, in OpenGL_accelerate.vbo.VBO.__getattr__
(D:\Build\PyOpenGL\pyopengl-bzr\OpenGL_accelerate\src\vbo.c:2757)
AttributeError: 'numpy.ndarray' object has no attribute 'buffers'
Here are two things I found that might be related to the issue:
1.) PyOpenGL 3.1.0b3; Py_buffer on Python3 unsupported
https://sourceforge.net/p/pyopengl/mailman/message/32385909/
2.) This post that mentions that Python 3 might be the problem. Is that
the case?
http://stackoverflow.com/questions/21821045/numpy-getbuffer-causes-attributeerror-module-object-has-no-attribute-getbuff
Are they related to the issue?
Well, I found that another example
https://github.com/enjalot/adventures_in_opencl/blob/master/python/part2/part2.py
was trying to fix this like
<python>
try:
self.pos_cl = cl.GLBuffer(self.ctx, mf.READ_WRITE,
int(self.pos_vbo.buffer))
self.col_cl = cl.GLBuffer(self.ctx, mf.READ_WRITE,
int(self.col_vbo.buffer))
except AttributeError:
self.pos_cl = cl.GLBuffer(self.ctx, mf.READ_WRITE,
int(self.pos_vbo.buffers[0]))
self.col_cl = cl.GLBuffer(self.ctx, mf.READ_WRITE,
int(self.col_vbo.buffers[0]))
</python>
But changing the example above like this results in
Traceback (most recent call last):
File ".\python-3.3.3.amd64\lib\site-packages\OpenGL\GLUT\special.py",
line 130, in safeCall
return function( *args, **named )
File ".\testpyopengl.py", line 182, in draw
gl.glVertexPointer(4, gl.GL_FLOAT, 0, self.arrvbo)
File "latebind.pyx", line 32, in
OpenGL_accelerate.latebind.LateBind.__call__
(D:\Build\PyOpenGL\pyopengl-bzr\OpenGL_accelerate\src\latebind.c:992)
File "wrapper.pyx", line 314, in
OpenGL_accelerate.wrapper.Wrapper.__call__
(D:\Build\PyOpenGL\pyopengl-bzr\OpenGL_accelerate\src\wrapper.c:6508)
File "wrapper.pyx", line 311, in
OpenGL_accelerate.wrapper.Wrapper.__call__
(D:\Build\PyOpenGL\pyopengl-bzr\OpenGL_accelerate\src\wrapper.c:6442)
File
".\python-3.3.3.amd64\lib\site-packages\OpenGL\platform\baseplatform.py", line
402, in __call__
return self( *args, **named )
ctypes.ArgumentError: ("argument 4: <class 'TypeError'>: wrong type",
(4, GL_FLOAT, 0, <OpenGL_accelerate.vbo.VBO object at 0x0000000004752A60>))
GLUT Display callback <bound method test.draw of <__main__.test object
at 0x0000000003A959B0>> with (),{} failed: returning None ("argument 4:
<class 'TypeError'>: wrong type", (4, GL_FLOAT, 0,
<OpenGL_accelerate.vbo.VBO object at 0x0000000004752A60>))
Well, that for now. I hope you have some ideas on how to fix this.
Kind regards,
Joe
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