[visionegg] Re: muti-stim error
I didn't realize there was an a6. I had been using a5 for awhile because it avoided this issue under the assumption that it was an opengl glitch rather than visionegg. I'd been trying b versions as they went along but dropping back to a5 when each failed. Unfortunately, now a5 isn't available in pypi for Mac OS X. If it's an issue though I'll go look for an a5 source and see if that works. 

On Feb 2, 2009, at 7:18 PM, Andrew Straw wrote:


John Christie wrote:

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. 

Well, hopefully I'll be able to get to the bottom of this... It look
potentially related to the rather obscure GL_UNSIGNED_INT_8_8_8_8_REV
data type, so I guess this won't affect too many people.


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).
I just checked with 3.0.0a6, and it has this issue, too. You can try for 
yourself with
http://archive.ubuntu.com/ubuntu/pool/universe/p/pyopengl/pyopengl_3.0.0 ~a6.orig.tar.gz (Ubuntu and Debian always make available the source code of the packages 
their binaries were built with, together with the patches they used to
build them. This can be handy even if you're not using Ubuntu or Debian. 
FYI, I found this using the packages.ubuntu.com search engine.)



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$


======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html



--
Dr. Andrew D. Straw
California Institute of Technology
http://www.its.caltech.edu/~astraw/
======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html


======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html



--
Dr. Andrew D. Straw
California Institute of Technology
http://www.its.caltech.edu/~astraw/
======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html


======================================
The Vision Egg mailing list
Archives: http://www.freelists.org/archives/visionegg
Website: http://www.visionegg.org/mailinglist.html

Other related posts: