[visionegg] Re: muti-stim error

That's great Andrew. Scripts of my own that I've tested so far work fine so it's not an issue for me yet. However, "moving on" for some won't be possible because there does not seem to be a version of pyopengl for Mac OS X and Python 2.5 for which this bug does not crop up.
It's been present in all of the versions of 3.0.0b I've tried and I can't seem to find a 3.0.0a (which seemed to work fine). 

On Feb 2, 2009, at 5:54 PM, Andrew Straw wrote:


Hi John,

Thanks for the bug report. On Ubuntu 8.04, I can reproduce this with
PyOpenGL 3.0.0b6, but it is not present with PyOpenGL 2.0.1.09. I can
workaround it by changing VisionEgg/Core.py line 475 to "if 0:" (from
"if gl_version >= '1.2' and hasattr(gl,'GL_BGRA'):").
I'm going to dig deeper and determine if this is a bug with PyOpenGL or the VE, but in the meantime, that's hopefully enough for you to move on. I'll report it if it's a bug with PyOpenGL and fix it if it's a bug with 
the VE.

-Andrew

John Christie wrote:

HI,

I think I've tried all the other demos but multi_stim.

visionegg 1.1.2
numpy 1.2.1
pyopengl 3.0.0b8

Mac OS X 10.5.6


DC397:visionegg-1.1.2 demos jc$ python multi_stim.py
2009-02-02 16:39:01,190 (12012) INFO: Script multi_stim.py started
Vision Egg 1.1.2 with process id 12012.
2009-02-02 16:39:06,581 (12012) INFO: Requesting window 640 x 480 32 bpp 
(8 8 8 0 RGBA).
2009-02-02 16:39:06,678 (12012) INFO: OpenGL 1.2 APPLE-1.5.36, Intel GMA 
X3100 OpenGL Engine, Intel Inc. (PyOpenGL 3.0.0b8)
2009-02-02 16:39:06,678 (12012) INFO: Video system reports 32 bpp (8 8 8 
8 RGBA).
2009-02-02 16:39:07,446 (12012) CRITICAL: Traceback (most recent call
last):
 File "multi_stim.py", line 216, in <module>
   framebuffer_copy_texture = Texture(
texels=screen.get_framebuffer_as_image(format=gl.GL_RGBA) )
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/visionegg-1.1.2-py2.5-macosx-10.3-fat.egg/VisionEgg/ Core.py", 
line 441, in get_framebuffer_as_image
   size=size,
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/visionegg-1.1.2-py2.5-macosx-10.3-fat.egg/VisionEgg/ Core.py", 
line 488, in get_framebuffer_as_array
   fb_array = Numeric.reshape(fb_array,(size[1],size[0],4))
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/numpy-1.2.1-py2.5-macosx-10.3-fat.egg/numpy/ oldnumeric/functions.py", 
line 97, in reshape
   return np.reshape(a, shape)
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/numpy-1.2.1-py2.5-macosx-10.3-fat.egg/numpy/core/ fromnumeric.py", 
line 145, in reshape
   return reshape(newshape, order=order)
ValueError: total size of new array must be unchanged

Traceback (most recent call last):
 File "multi_stim.py", line 216, in <module>
   framebuffer_copy_texture = Texture(
texels=screen.get_framebuffer_as_image(format=gl.GL_RGBA) )
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/visionegg-1.1.2-py2.5-macosx-10.3-fat.egg/VisionEgg/ Core.py", 
line 441, in get_framebuffer_as_image
   size=size,
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/visionegg-1.1.2-py2.5-macosx-10.3-fat.egg/VisionEgg/ Core.py", 
line 488, in get_framebuffer_as_array
   fb_array = Numeric.reshape(fb_array,(size[1],size[0],4))
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/numpy-1.2.1-py2.5-macosx-10.3-fat.egg/numpy/ oldnumeric/functions.py", 
line 97, in reshape
   return np.reshape(a, shape)
 File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ site-packages/numpy-1.2.1-py2.5-macosx-10.3-fat.egg/numpy/core/ fromnumeric.py", 
line 145, in reshape
   return reshape(newshape, order=order)
ValueError: total size of new array must be unchanged
DC397:visionegg-1.1.2 demos jc$


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--
Dr. Andrew D. Straw
California Institute of Technology
http://www.its.caltech.edu/~astraw/
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