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#
# Test script for OpenGL from python (and from other threads in general)
# With GL locking, 1 view seems to work reliably, not two views, though.
#
# Some drivers (nvidia) raise XBadAccess if there is an attempt to access
# OpenGL context concurrently from different threads.
# Other drivers (intel, at least on my laptop) freeze the videocard completely
# if that is the case.
#
# You can enable the "if False:" part (say "if True:" instead) to see what
# it does in your case.
#
from yade import qt
from yade import utils
O.bodies.append(utils.box([0, 0, 0], [1, 1, 1], color=[1, 0, 0]))
O.bodies.append(utils.sphere([0, 2, 0], 1, color=[0, 1, 0]))
print('Begin here.')
qt.View()
print('Created view')
glv0 = qt.GLViewer()
print('view #0') # get GLViewer instance for the primary view
glv0.grid = True, True, False
print('grid x,y')
glv0.axes = True
print('axes shown')
glv0.screenSize = 200, 200
print('screen size set to 200x200')
glv0.center(True)
print('median center') # median center - will fallback since there are only 2 bodies
##
## !!! If you enable this, you may crash your machine !!!
##
if False:
glv1 = qt.View()
print('Created 2nd view') # create new view
glv1.fps = True
print('fps shown')
glv1.lookAt = (0, 1, 0)
print('lookAt set')
glv1.viewDirection = (0, -1, 0)
print('viewDirection set')
glv1.center()
print('center')
print('list of views:', qt.views()) # list all views we have
print("CONGRATULATIONS! You passed the OpenGL test without crash or freeze :-)")
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