def _buildPluginHierarchy(dummyClasses=None):
'''Dynamically query the mel node hierarchy for all plugin node types
This command must be run from within a running maya session - ie, where
maya.cmds, etc are accessible.
'''
import pymel.internal.apicache as apicache
if dummyClasses is None:
dummyClasses = _createDummyPluginNodeClasses()
# note that we always try to query inheritance, even for node types in
# NON_CREATABLE, because post 2012, we should be able to query inheritance
# without needing to create a node...
inheritances = {}
for pluginType, dummyClass in dummyClasses.iteritems():
nodeType = dummyClass.mayaName()
wasRegistered = dummyClass.isRegistered()
if not wasRegistered:
dummyClass.register()
try:
try:
inheritance = apicache.getInheritance(nodeType)
except apicache.ManipNodeTypeError:
continue
finally:
if not wasRegistered:
dummyClass.deregister()
if not inheritance:
# If there was a problem creating a node - for instance, in the
# case of MPxParticleAttributeMapperNode...
continue
assert inheritance[-1] == nodeType
inheritances[pluginType] = inheritance[:-1]
return inheritances
def _buildPluginHierarchy(dummyClasses=None):
"""Dynamically query the mel node hierarchy for all plugin node types
This command must be run from within a running maya session - ie, where
maya.cmds, etc are accessible.
"""
import pymel.internal.apicache as apicache
if dummyClasses is None:
dummyClasses = _createDummyPluginNodeClasses()
# note that we always try to query inheritance, even for node types in
# NON_CREATABLE, because post 2012, we should be able to query inheritance
# without needing to create a node...
inheritances = {}
for pluginType, dummyClass in dummyClasses.iteritems():
nodeType = dummyClass.mayaName()
wasRegistered = dummyClass.isRegistered()
if not wasRegistered:
dummyClass.register()
try:
try:
inheritance = apicache.getInheritance(nodeType)
except apicache.ManipNodeTypeError:
continue
finally:
if not wasRegistered:
dummyClass.deregister()
if not inheritance:
# If there was a problem creating a node - for instance, in the
# case of MPxParticleAttributeMapperNode...
continue
assert inheritance[-1] == nodeType
inheritances[pluginType] = inheritance[:-1]
return inheritances
def _getNodeHierarchy(version=None):
"""
get node hierarchy as a list of 3-value tuples:
( nodeType, parents, children )
"""
import pymel.util.trees as trees
import pymel.internal.apicache as apicache
if versions.current() >= versions.v2012:
# We now have nodeType(isTypeName)! yay!
inheritances = {}
for nodeType in apicache._getAllMayaTypes():
try:
inheritances[nodeType] = apicache.getInheritance(nodeType)
except apicache.ManipNodeTypeError:
continue
except Exception:
print "Error getting inheritance: %s" % nodeType
raise
parentTree = {}
# Convert inheritance lists node=>parent dict
for nodeType, inheritance in inheritances.iteritems():
for i in xrange(len(inheritance)):
child = inheritance[i]
if i == 0:
if child == 'dependNode':
continue
else:
parent = 'dependNode'
else:
parent = inheritance[i - 1]
if child in parentTree:
assert parentTree[child] == parent, "conflicting parents: node type '%s' previously determined parent was '%s'. now '%s'" % (child, parentTree[child], parent)
else:
parentTree[child] = parent
nodeHierarchyTree = trees.treeFromDict(parentTree)
else:
from .parsers import NodeHierarchyDocParser
parser = NodeHierarchyDocParser(version)
nodeHierarchyTree = trees.IndexedTree(parser.parse())
return [(x.value, tuple(y.value for y in x.parents()), tuple(y.value for y in x.childs()))
for x in nodeHierarchyTree.preorder()]