[visionegg] Re: I have a selective lesion in my mask2d computer circuit
- From: Andrew Straw <astraw@xxxxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Fri, 17 Oct 2008 00:16:28 -0700
Hi Alex,
I just tested this demo and it runs fine with and without the mask
enabled on my linux machine using an ATI card and ATI fglrx drivers. I
have no idea what the problem might be with Mac OS X, but as a start,
what video card and drivers are you using?
Also, is there a PyOpenGL version 2.x you could test? I've had trouble
with version 3 on Windows, perhaps there are still issues on Mac.
The mask uses multitexturing, which has been part of the OpenGL standard
for a long time, so I'm at a loss to figure out what is going on here.
-Andrew
Alex Holcombe wrote:
> We have installed visionegg on a MacBook (OSX 10.5.2) using Python 2.5
> and the appropriate libraries for it.
> The visionegg demos all seem to work, including the alpha demos and
> the drum demo and other texture demos, but what does not work is those
> demos which use Mask2D. For instance, in the program at end of this
> message I have modified gabor.py by commenting out the circular mask.
> This makes the grating visible on our machine. However, if I uncomment
> out the mask, no stimulus is evident in the visionegg window!
>
> Any ideas what could selectively affect Mask2D? We actually had
> everything working with an earlier install on this machine, using
> Python 2.4, but then we started getting bus errors with nearly every
> VisionEgg program we ran. We haven't managed to resurrect the
> original working Python 2.4 configuration, so we've moved on to Python
> 2.5.
>
> Below I'm pasting the latter part of the output of check-config.py :
>
> SYNCLYNC_PRESENT = 0
> VISIONEGG_ALWAYS_START_LOGGING = 0
> VISIONEGG_CONFIG_FILE =
> /Users/shihyulo/Desktop/visionegg-1.1.1/VisionEgg/VisionEgg.cfg
> VISIONEGG_DARWIN_CONVENTIONAL_PRIORITY = -20
> VISIONEGG_DARWIN_MAXPRIORITY_CONVENTIONAL_NOT_REALTIME = 1
> VISIONEGG_DARWIN_PTHREAD_PRIORITY = max
> VISIONEGG_DARWIN_REALTIME_COMPUTATION_DENOM = 2400
> VISIONEGG_DARWIN_REALTIME_CONSTRAINT_DENOM = 1200
> VISIONEGG_DARWIN_REALTIME_PERIOD_DENOM = 120
> VISIONEGG_DARWIN_REALTIME_PREEMPTIBLE = 0
> VISIONEGG_DOUBLE_BUFFER = 1
> VISIONEGG_FRAMELESS_WINDOW = 0
> VISIONEGG_FULLSCREEN = 0
> VISIONEGG_GAMMA_FILE = custom.ve_gamma
> VISIONEGG_GAMMA_INVERT_BLUE = 2.1
> VISIONEGG_GAMMA_INVERT_GREEN = 2.1
> VISIONEGG_GAMMA_INVERT_RED = 2.1
> VISIONEGG_GAMMA_SOURCE = none
> VISIONEGG_GUI_INIT = 1
> VISIONEGG_GUI_ON_ERROR = 1
> VISIONEGG_HIDE_MOUSE = 1
> VISIONEGG_LOG_FILE = VisionEgg.log
> VISIONEGG_LOG_TO_STDERR = 1
> VISIONEGG_MAXPRIORITY = 0
> VISIONEGG_MONITOR_REFRESH_HZ = 60.0
> VISIONEGG_MULTISAMPLE_SAMPLES = 0
> VISIONEGG_PREFERRED_BPP = 32
> VISIONEGG_REQUEST_ALPHA_BITS = 0
> VISIONEGG_REQUEST_BLUE_BITS = 8
> VISIONEGG_REQUEST_GREEN_BITS = 8
> VISIONEGG_REQUEST_RED_BITS = 8
> VISIONEGG_REQUEST_STEREO = 0
> VISIONEGG_SCREEN_H = 480
> VISIONEGG_SCREEN_W = 640
> VISIONEGG_SYNC_SWAP = 1
> VISIONEGG_SYSTEM_DIR = /Users/shihyulo/Desktop/visionegg-1.1.1/VisionEgg
> VISIONEGG_TKINTER_OK = 1
> VISIONEGG_USER_DIR = /Users/shihyulo/VisionEgg
>
> Version checklist:
>
> Python version 2.5 (OK)
> extra Python info: (r25:51918, Sep 19 2006, 08:49:13) [GCC 4.0.1 (Apple
> Computer, Inc. build 5341)]
> numpy version 1.0.4 (OK)
> PyOpenGL (package "OpenGL") version 3.0.0b6 (OK)
> pygame version 1.8.1release-svn1537 (OK)
> Python Imaging Library (package "Image") version 1.1.6 (OK)
>
> Optional module(s):
>
> Pyro failed
>
> -------------modified gabor.py below-----------------
> ############################
> # Import various modules #
> ############################
>
> import VisionEgg
> VisionEgg.start_default_logging(); VisionEgg.watch_exceptions()
>
> from VisionEgg.Core import *
> from VisionEgg.FlowControl import Presentation
> from VisionEgg.Gratings import SinGrating2D
> from VisionEgg.Textures import Mask2D
>
> #####################################
> # Initialize OpenGL window/screen #
> #####################################
>
> screen = get_default_screen()
>
> ##########################################################
> # Create sinusoidal grating object and gaussian window #
> ##########################################################
>
> mask = Mask2D(function='gaussian', # also supports 'circle'
> radius_parameter=25, # sigma for gaussian, radius for
> circle (units: num_samples)
> num_samples=(256,256)) # this many texture elements in
> mask (covers whole size specified below)
>
> stimulus = SinGrating2D(#mask = mask,
> position = ( screen.size[0]/2.0,
> screen.size[1]/2.0 ),
> size = ( 300.0 , 300.0 ),
> spatial_freq = 10.0 / screen.size[0], #
> units of cycles/pixel
> temporal_freq_hz = 1.0,
> orientation = 45.0 )
>
> ###############################################################
> # Create viewport - intermediary between stimuli and screen #
> ###############################################################
>
> viewport = Viewport( screen=screen, stimuli=[stimulus] )
>
> ########################################
> # Create presentation object and go! #
> ########################################
>
> p = Presentation(go_duration=(5.0,'seconds'),viewports=[viewport])
> p.go()
>
>
>
> ======================================
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--
Dr. Andrew D. Straw
California Institute of Technology
http://www.its.caltech.edu/~astraw/
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