PyGaze with Pyglet

Comments

• Edwin

  December 2014 edited 5:46PM

  Hi jl,

  There are two options:

  1) Rewrite Display and Screen (and possibly Keyboard and Mouse). Basically, this means implementing all the existing functionality (provided through PyGame and PsychoPy) by wrapping Pyglet.

  2) Use the EyeTracker class with an active PyGaze Display under the PsychoPy display type, then hijack the Pyglet window. The recipe would be fairly straightforward:

  constants.py

  # set the display size to the same display size as your 
  DISPSIZE = (1920,1080)
  # important: set the display type to 'psychopy'!
  DISPTYPE = 'psychopy'
  # set the tracker type to the type of your choice
  TRACKERTYPE = 'eyetribe'
  
  # you can add more stuff here, to overwrite the defaults
  

  experiment.py

  import pygaze
  from pygaze.display import Display
  from pygaze.eyetracker import EyeTracker
  
  # initialize a Display
  disp = Display()
  # create a new EyeTracker instance
  tracker = EyeTracker(disp)
  
  # get the handle to the pyglet window
  pygletwin = pygaze.expdisplay.winHandle
  
  # next do whatever you want with the Pyglet handle!
  

  Good luck!
• jlda

  December 2014 edited December 2014

  Hi Edwin,

  Thank you very much for your answer.

  I have tried to put the second option in practice, but I have not succeeded. I understand that
  pygletwin = pygaze.expdisplay.winHandle

  will create a pyglet window, but I have not found any documentation on how to use it.

  Following the code in your answer, I have tried to make something simple as to display a square on the screen, but the screen remains empty and there is no error message.

  This is the code I am using:

  import pygaze
  from pygaze.libscreen import Display
  from pygaze.eyetracker import EyeTracker
  from pygaze.libinput import Keyboard
  import pyglet
  from pyglet.gl import *
  from random import random
  
  def main():
      # initialize a Display
      disp = Display()
  
      # create a new EyeTracker instance
      tracker = EyeTracker(disp)
  
      # calibrate eye tracker
      tracker.calibrate()
  
      # get the handle to the pyglet window
      pygletwin = disp.expdisplay.winHandle
  
      kb = Keyboard(keylist=['space'],timeout=None)
      x = pygletwin.width/2
      y = pygletwin.height/2
      w = 3000
  
      color = (1,1,1)
  
      # next do whatever you want with the Pyglet handle!
      while kb.get_key()[0] == None:
  
          pyglet.graphics.draw(4, pyglet.gl.GL_QUAD, 
                      ('v2i', (x-w, y-w, x-w, y+w, x+w, y-w, x+w, y+w)),                                                                                  # position of each vertices
                      ('c3B', (color[0], color[1], color[2], color[0], color[1], color[2], color[0], color[1], color[2], color[0], color[1], color[2]))   # color of each vertex                  
                      )   
          pygletwin.dispatch_events()
          pygletwin.clear()
          pygletwin.flip()
          pass
  
      pygletwin.close()
  
  if __name__=='__main__':
      main()
  
  

  Thanks for your help.
• Edwin

  December 2014 edited December 2014

  Could it be because you call pygletwin.clear() before calling pygletwin.flip()?

  You mention you already have the Pyglet code for your stimulus, so I assumed you were familiar with it's Window class. I am not, but I did find some documentation here.

  Good luck!
• jlda

  December 2014 edited 5:46PM

  Hi Edwin,

  Thank you for your answer.

  I made the following mistake (but I have not solved my problem): nothing was being drawn because the pyglet.clear() call was after drawing the square. Now the while loop looks like this:

  def my_function():
      while kb.get_key()[0] == None:
  
          pygletwin.dispatch_events()     # dispatch events of pyglet window
          pygletwin.clear()               # clear pyglet window
  
          pyglet.graphics.draw(4, pyglet.gl.GL_QUADS,             # draw square 
                      ('v2i', (x-w, y-w, x-w, y+w, x+w, y-w, x+w, y+w)),
                      )   
  
          pygletwin.flip()        # flip pyglet window
          pass
  

  When pygletwin is initialzed as a normal pyglet window, i.e. pygletwin = pyglet.window.Window(), the square is drawn. However, when I use pygletwin = disp.expdisplay.winHandle, nothing is drawn.

  I am more or less familiar with the Pyglet Window class, but, sorry, I was not clear that I was refering to the winHandle method, that I believe it is a method of the PsychoPy window, but I have not found any documentation at all.

  Thank you very much for your help, I really appreciate it.

  jl