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# Copyright 2004-2009 Nanorex, Inc. See LICENSE file for details.
"""
drawing_constants.py - constants and helpers for graphics.drawing package
@author: Russ, plus others if the code that belongs here is ever moved here
@version: $Id$
@copyright: 2004-2009 Nanorex, Inc. See LICENSE file for details.
History:
090304 bruce split out of drawing_globals to avoid import cycles
TODO:
some geometric variables (but not display lists!) stored into drawing_globals
by external code (mostly setup_draw) should instead be defined here.
"""
# Common constants and helpers for DrawingSet, TransformControl, et al.
# Russ 080915: Support for lazily updating drawing caches, namely a change
# timestamp. Rather than recording a time per se, an event counter is used.
NO_EVENT_YET = 0
_event_counter = NO_EVENT_YET
def eventStamp():
global _event_counter
_event_counter += 1
return _event_counter
def eventNow(): # not used
return _event_counter
# end
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