/usr/share/python-visionegg/demo/dots.py is in python-visionegg 1.2.1-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | #! /usr/bin/python
"""Random dot stimulus"""
############################
# Import various modules #
############################
import VisionEgg
VisionEgg.start_default_logging(); VisionEgg.watch_exceptions()
from VisionEgg.Core import get_default_screen, Viewport
from VisionEgg.FlowControl import Presentation
from VisionEgg.Dots import DotArea2D
#####################################
# Initialize OpenGL window/screen #
#####################################
screen = get_default_screen()
screen.parameters.bgcolor = (0.0,0.0,0.0,0.0) # make black (RGBA)
######################################
# Create random dot stimulus #
######################################
stimulus = DotArea2D( position = ( screen.size[0]/2.0, screen.size[1]/2.0 ),
anchor = 'center',
size = ( 300.0 , 300.0 ),
signal_fraction = 0.1,
signal_direction_deg = 180.0,
velocity_pixels_per_sec = 10.0,
dot_lifespan_sec = 5.0,
dot_size = 3.0,
num_dots = 100)
###############################################################
# Create viewport - intermediary between stimuli and screen #
###############################################################
viewport = Viewport( screen=screen, stimuli=[stimulus] )
########################################
# Create presentation object and go! #
########################################
p = Presentation(go_duration=(10.0,'seconds'),viewports=[viewport])
p.go()
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