def _hasFn(self, apiType, dagMod, dgMod, parentType=None) :
""" Get the Maya API type from the name of a Maya type """
if parentType is None :
parentType = 'kBase'
# Reserved we can't determine it as we can't create the node, all we can do is check if it's
# in the self.reservedApiHierarchy
if self.reservedApiTypes.has_key(apiType) :
return self.reservedApiHierarchy.get(apiType, None) == parentType
# Need the MFn::Types enum for the parentType
if self.apiTypesToApiEnums.has_key(parentType) :
typeInt = self.apiTypesToApiEnums[parentType]
else :
return False
# print "need creation for %s" % apiType
obj = self._getMObject(apiType, dagMod, dgMod, parentType)
if api.isValidMObject(obj) :
return obj.hasFn(typeInt)
else :
return False
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:
try :
# Try making it with dgMod FIRST - this way, we can avoid making an
# unneccessary transform if it is a DG node
obj = dgMod.createNode ( mayaType )
except RuntimeError:
# DagNode
obj = dagMod.createNode ( mayaType, parent )
_logger.debug( "Made ghost DAG node of type '%s'" % mayaType )
else:
# DependNode
_logger.debug( "Made ghost DG node of type '%s'" % mayaType )
# dgMod.deleteNode(obj)
except:
obj = api.MObject()
# dagMod.deleteNode(parent)
if api.isValidMObject(obj) :
return obj
else :
_logger.debug("Error trying to create ghost node for '%s'" % mayaType)
return None
def mayaTypeToApiType(mayaType) :
""" Get the Maya API type from the name of a Maya type """
try:
return apiCache.mayaTypesToApiTypes[mayaType]
except KeyError:
apiType = 'kInvalid'
# Reserved types must be treated specially
if apiCache.reservedMayaTypes.has_key(mayaType) :
# It's an abstract type
apiType = apiCache.reservedMayaTypes[mayaType]
else :
# we create a dummy object of this type in a dgModifier
# as the dgModifier.doIt() method is never called, the object
# is never actually created in the scene
obj = api.MObject()
dagMod = api.MDagModifier()
dgMod = api.MDGModifier()
obj = _makeDgModGhostObject(mayaType, dagMod, dgMod)
if api.isValidMObject(obj):
apiType = obj.apiTypeStr()
return apiType
# 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
if api.isValidMObject(obj) :
return obj
else :
_logger.debug("Error trying to create ghost node for '%s'" % mayaType)
return None
class InvalidNodeTypeError(Exception): pass
class ManipNodeTypeError(InvalidNodeTypeError): pass
class _GhostObjMaker(object):
'''Context used to get an mobject which we can query within this context.
Automatically does any steps need to create and destroy the mobj within
the context
(Note - None may be returned in the place of any mobj)
# 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
if api.isValidMObject(obj):
return obj
else:
_logger.debug("Error trying to create ghost node for '%s'" % mayaType)
return None
class InvalidNodeTypeError(Exception):
pass
class ManipNodeTypeError(InvalidNodeTypeError):
pass
class _GhostObjMaker(object):
def _parentFn(self, apiType, dagMod, dgMod, *args, **kwargs) :
""" Checks the given API type list, or API type:MObject dictionnary to return the first parent of apiType """
if not kwargs :
if not args :
args = ('kBase', )
kwargs = dict( (args[k], None) for k in args )
else :
for k in args :
if not kwargs.has_key(k) :
kwargs[k] = None
# Reserved we can't determine it as we can't create the node, all we can do is check if it's
# in the self.reservedApiHierarchy
if self.reservedApiTypes.has_key(apiType) :
p = self.reservedApiHierarchy.get(apiType, None)
if p is not None :
for t in kwargs.keys() :
if p == t :
return t
return None
result = None
obj = kwargs.get(apiType, None)
if not api.isValidMObject(obj) :
# print "need creation for %s" % apiType
obj = self._getMObject(apiType, dagMod, dgMod)
if api.isValidMObject(obj) :
if not kwargs.get(apiType, None) :
kwargs[apiType] = obj # update it if we had to create
parents = []
for t in kwargs.keys() :
# Need the MFn::Types enum for the parentType
if t != apiType :
if self.apiTypesToApiEnums.has_key(t) :
ti = self.apiTypesToApiEnums[t]
if obj.hasFn(ti) :
parents.append(t)
# problem is the MObject.hasFn method returns True for all ancestors, not only first one
if len(parents) :
if len(parents) > 1 :
for p in parents :
if self.apiTypesToApiEnums.has_key(p) :
ip = self.apiTypesToApiEnums[p]
isFirst = True
for q in parents :
if q != p :
stored = kwargs.get(q, None)
if not stored :
if self.reservedApiTypes.has_key(q) :
isFirst = not self.reservedApiHierarchy.get(q, None) == p
else :
stored = self._getMObject(q, dagMod, dgMod)
if not kwargs.get(q, None) :
kwargs[q] = stored # update it if we had to create
if stored :
isFirst = not stored.hasFn(ip)
if not isFirst :
break
if isFirst :
result = p
break
else :
result = parents[0]
return result