def _makeDgModGhostObject(mayaType, dagMod, dgMod):
# we create a dummy object of this type in a dgModifier (or dagModifier)
# as the dgModifier.doIt() method is never called, the object
# is never actually created in the scene
# Note: at one point, if we didn't call the dgMod/dagMod.deleteNode method,
# and we call this function while loading a scene (for instance, if the scene requires
# a plugin that isn't loaded, and defines custom node types), then the nodes were still
# somehow created, despite never explicitly calling doIt()...
# ... however, this seems to no longer be the case, and the deleteNode calls are apparently
# harmful
if type(dagMod) is not api.MDagModifier or type(
dgMod) is not api.MDGModifier:
raise ValueError, "Need a valid MDagModifier and MDGModifier or cannot return a valid MObject"
# Regardless of whether we're making a DG or DAG node, make a parent first -
# for some reason, this ensures good cleanup (don't ask me why...??)
parent = dagMod.createNode('transform', api.MObject())
try:
# DependNode
obj = dgMod.createNode(mayaType)
except RuntimeError:
# DagNode
try:
obj = dagMod.createNode(mayaType, parent)
except Exception, err:
_logger.debug("Error trying to create ghost node for '%s': %s" %
(mayaType, err))
return None
def _makeDgModGhostObject(mayaType, dagMod, dgMod):
if versions.current() >= versions.v2012:
# only time post-2012 when we should have to call this func is when
# rebuilding caches - ie, running from inside ApiCache
if not GhostObjsOkHere.OK():
_logger.raiseLog(_logger.WARNING, '_makeDgModGhostObject should be unnecessary in maya versions past 2012 (except when rebuilding cache)')
# we create a dummy object of this type in a dgModifier (or dagModifier)
# as the dgModifier.doIt() method is never called, the object
# is never actually created in the scene
# Note: at one point, if we didn't call the dgMod/dagMod.deleteNode method,
# and we call this function while loading a scene (for instance, if the scene requires
# a plugin that isn't loaded, and defines custom node types), then the nodes were still
# somehow created, despite never explicitly calling doIt()...
# ... however, this seems to no longer be the case, and the deleteNode calls are apparently
# harmful
if type(dagMod) is not api.MDagModifier or type(dgMod) is not api.MDGModifier:
raise ValueError, "Need a valid MDagModifier and MDGModifier or cannot return a valid MObject"
# Regardless of whether we're making a DG or DAG node, make a parent first -
# for some reason, this ensures good cleanup (don't ask me why...??)
parent = dagMod.createNode('transform', api.MObject())
try:
# DependNode
obj = dgMod.createNode(mayaType)
except RuntimeError:
# DagNode
try:
obj = dagMod.createNode(mayaType, parent)
except Exception, err:
_logger.debug("Error trying to create ghost node for '%s': %s" % (mayaType, err))
return None