[PyOpenGL-Devel] [ pyopengl-Bugs-1850600 ] glMultMatrix does not work correctly with transposed arrays

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Bugs item #1850600, was opened at 2007-12-14 09:46
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Category: GL
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Toon Verstraelen (tovrstra)
Assigned to: Nobody/Anonymous (nobody)
Summary: glMultMatrix does not work correctly with transposed arrays

Initial Comment:
Hello,

In the example attached, it shown that the function glMultMatrixf does not work correctly with transposed arrays. Apparently, the strides of a numpy.array object are ignored. This problem is present in version 3.0.0a6. It was not present in the 2.x versions.

In the program bug.py, the relevant part is marked by comments 'BEGIN INTERESTING PART' and 'END INTERESTING PART'. When transf.transpose() is given as argument, glGetFloatv(GL_MODELVIEW_MATRIX) clearly shows the problem. When transf.transpose().copy() is given as argument, the problem is 'fixed', but not in a very satisfying way.

cheers,

Toon

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You can respond by visiting: 
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