class LayerData(object):
'''
Intermediate data object between ngSkinTools core and importers/exporters,
representing all layers info in one skin cluster.
.. py:attribute:: layers
a list of :py:class:`Layer` objects.
.. py:attribute:: influences
a list of :py:class:`InfluenceInfo` objects. Provides information about influences
that were found on exported skin data, and used for influence matching when importing.
'''
def __init__(self):
self.layers = []
self.mll = MllInterface()
self.meshInfo = MeshInfo()
self.influences = []
# a map [sourceInfluenceName] -> [destinationInfluenceName]
self.mirrorInfluenceAssociationOverrides = None
self.skinClusterFn = None
def addMirrorInfluenceAssociationOverride(self,
sourceInfluence,
destinationInfluence=None,
selfReference=False,
bidirectional=True):
'''
Adds mirror influence association override, similar to UI of "Add influences association".
Self reference creates a source<->source association, bidirectional means that destination->source
link is added as well
'''
if self.mirrorInfluenceAssociationOverrides is None:
self.mirrorInfluenceAssociationOverrides = {}
if selfReference:
self.mirrorInfluenceAssociationOverrides[
sourceInfluence] = sourceInfluence
return
if destinationInfluence is None:
raise MessageException("destination influence must be specified")
self.mirrorInfluenceAssociationOverrides[
sourceInfluence] = destinationInfluence
if bidirectional:
self.mirrorInfluenceAssociationOverrides[
destinationInfluence] = sourceInfluence
def addLayer(self, layer):
'''
register new layer into this data object
:param Layer layer: layer object to add.
'''
assert isinstance(layer, Layer)
self.layers.append(layer)
@staticmethod
def getFullNodePath(nodeName):
result = cmds.ls(nodeName, l=True)
if result is None or len(result) == 0:
raise MessageException("node %s was not found" % nodeName)
return result[0]
def loadInfluenceInfo(self):
self.influences = self.mll.listInfluenceInfo()
def loadFrom(self, mesh):
'''
loads data from actual skin cluster and prepares it for exporting.
supply skin cluster or skinned mesh as an argument
'''
self.mll.setCurrentMesh(mesh)
meshExporter = MeshDataExporter()
self.meshInfo = MeshInfo()
if mesh != MllInterface.TARGET_REFERENCE_MESH:
mesh, skinCluster = self.mll.getTargetInfo()
meshExporter.setTransformMatrixFromNode(mesh)
meshExporter.useSkinClusterInputMesh(skinCluster)
self.meshInfo.verts, self.meshInfo.triangles = meshExporter.export(
)
else:
self.meshInfo.verts = self.mll.getReferenceMeshVerts()
self.meshInfo.triangles = self.mll.getReferenceMeshTriangles()
self.loadInfluenceInfo()
# map LayerId->layerIndex
layerIndexById = {}
for index, (layerID, layerName,
parentId) in enumerate(self.mll.listLayers()):
layerIndexById[layerID] = index
self.mirrorInfluenceAssociationOverrides = self.mll.getManualMirrorInfluences(
)
if len(self.mirrorInfluenceAssociationOverrides) == 0:
self.mirrorInfluenceAssociationOverrides = None
layer = Layer()
layer.name = layerName
self.addLayer(layer)
layer.opacity = self.mll.getLayerOpacity(layerID)
layer.enabled = self.mll.isLayerEnabled(layerID)
layer.mask = self.mll.getLayerMask(layerID)
layer.dqWeights = self.mll.getDualQuaternionWeights(layerID)
# transform parent ID to local index in the model
if parentId is not None:
layer.parent = layerIndexById[parentId]
for inflName, logicalIndex in self.mll.listLayerInfluences(
layerID, activeInfluences=True):
if inflName == '':
inflName = None
influence = Influence()
if inflName is not None:
influence.influenceName = self.getFullNodePath(inflName)
influence.logicalIndex = logicalIndex
layer.addInfluence(influence)
influence.weights = self.mll.getInfluenceWeights(
layerID, logicalIndex)
def __validate(self):
numVerts = self.mll.getVertCount()
def validateVertCount(count, message):
if count != numVerts:
raise Exception(message)
for layer in self.layers:
if layer.mask is not None and len(layer.mask) != 0:
validateVertCount(
len(layer.mask),
"Invalid vertex count for mask in layer '%s': expected size is %d"
% (layer.name, numVerts))
for influence in layer.influences:
validateVertCount(
len(influence.weights),
"Invalid weights count for influence '%s' in layer '%s': expected size is %d"
% (influence.influenceName, layer.name, numVerts))
if self.skinClusterFn:
influence.logicalIndex = self.skinClusterFn.getLogicalInfluenceIndex(
influence.influenceName)
@Utils.undoable
def saveTo(self, mesh):
'''
saveTo(self,mesh)
saves data to actual skin cluster
'''
# set target to whatever was provided
self.mll.setCurrentMesh(mesh)
if mesh == MllInterface.TARGET_REFERENCE_MESH:
self.mll.setWeightsReferenceMesh(self.meshInfo.verts,
self.meshInfo.triangles)
if not self.mll.getLayersAvailable():
self.mll.initLayers()
if not self.mll.getLayersAvailable():
raise Exception("could not initialize layers")
# is skin cluster available?
if mesh != MllInterface.TARGET_REFERENCE_MESH:
mesh, self.skinCluster = self.mll.getTargetInfo()
self.skinClusterFn = SkinClusterFn()
self.skinClusterFn.setSkinCluster(self.skinCluster)
self.__validate()
# set target to actual mesh
self.mll.setCurrentMesh(mesh)
with self.mll.batchUpdateContext():
if self.mirrorInfluenceAssociationOverrides:
self.mll.setManualMirrorInfluences(
self.mirrorInfluenceAssociationOverrides)
# IDS of created layers, in reverse order
layerIds = []
for layer in reversed(self.layers):
layerId = self.mll.createLayer(name=layer.name,
forceEmpty=True)
layerIds.append(layerId)
self.mll.setCurrentLayer(layerId)
if layerId is None:
raise Exception(
"import failed: could not create layer '%s'" %
(layer.name))
self.mll.setLayerOpacity(layerId, layer.opacity)
self.mll.setLayerEnabled(layerId, layer.enabled)
self.mll.setLayerMask(layerId, layer.mask)
self.mll.setDualQuaternionWeights(layerId, layer.dqWeights)
self.mll.setLayerWeightsBufferSize(layerId,
len(layer.influences))
for influence in layer.influences:
# because layer was just created and will belong to same undo chunk, disabling undo
# for setting weights bit
self.mll.setInfluenceWeights(layerId,
influence.logicalIndex,
influence.weights,
undoEnabled=False)
# layer.parent reference index is in normal order, therefore need to reverse it again
layerIds = list(reversed(layerIds))
for index, layer in enumerate(self.layers):
if layer.parent is not None:
self.mll.setLayerParent(layerIds[index],
layerIds[layer.parent])
# reparenting will move it to the end of the list; move it to the bottom instead
self.mll.setLayerIndex(layerIds[index], 0)
def __repr__(self):
return "[LayerDataModel(%r)]" % self.layers
def getAllInfluences(self):
'''
a convenience method to retrieve a list of names of all influences used in this layer data object
'''
result = set()
for layer in self.layers:
for influence in layer.influences:
result.add(influence.influenceName)
return tuple(result)
class LayerDataModel:
log = getLogger("layerDataModel")
# holds instance of singleton object
__instance = None
@staticmethod
def getInstance():
'''
returns singleton instance of LayerDataModel
:rtype: LayerDataModel
'''
return LayerDataModel.__instance
@classmethod
def bindAll(cls):
cls.__instance = LayerDataModel()
MayaEvents.undoRedoExecuted.addHandler(
cls.__instance.updateLayerAvailability)
MayaEvents.nodeSelectionChanged.addHandler(
cls.__instance.updateLayerAvailability)
cls.__instance.updateLayerAvailability()
def __init__(self):
self.layerDataAvailable = None
self.mll = MllInterface()
self.clipboard = WeightsClipboard(self.mll)
def setLayerListsUI(self, ui):
self.layerListsUI = ui
def getLayerListsUI(self):
'''
:rtype: LayerListsUI
'''
from ngSkinTools.ui import mainwindow
mainWindow = mainwindow.MainWindow.getInstance()
if mainWindow is None:
return None
return mainWindow.getLayersUI()
def getSelectedLayer(self):
listsUi = self.getLayerListsUI()
if listsUi is None:
return None
return listsUi.getLayersList().getSelectedID()
def getSelectedLayers(self):
listsUi = self.getLayerListsUI()
if listsUi is None:
return []
return listsUi.getSelectedLayers()
def getSelectedInfluenceIds(self):
listsUi = self.getLayerListsUI()
if listsUi is None:
return []
return listsUi.getSelectedInfluenceIds()
def updateLayerAvailability(self):
'''
checks if availability of skin layers changed with the
current scene selection
'''
self.log.info("updating layer availability")
oldValue = self.layerDataAvailable
self.layerDataAvailable = self.mll.getLayersAvailable()
if self.layerDataAvailable != oldValue:
LayerEvents.layerAvailabilityChanged.emit()
@Utils.undoable
def addLayer(self, name):
def guessParent():
currentLayer = self.mll.getCurrentLayer()
if currentLayer is None:
return None
# guess layer's new parent
parentsByLayerId = dict([
(layerId, parentId)
for layerId, _, parentId in self.mll.listLayers()
if currentLayer in (layerId, parentId)
])
# current layer is a parent?
if currentLayer in parentsByLayerId.values():
return currentLayer
# current layer has parent
if currentLayer in parentsByLayerId.keys():
return parentsByLayerId[currentLayer]
layerId = self.mll.createLayer(name)
self.mll.setLayerParent(layerId, guessParent())
if layerId is None:
return None
LayerEvents.layerListModified.emit()
self.setCurrentLayer(layerId)
return layerId
def removeLayer(self, layerId):
self.mll.deleteLayer(layerId)
LayerEvents.layerListModified.emit()
LayerEvents.currentLayerChanged.emit()
def setCurrentLayer(self, layerId):
self.mll.setCurrentLayer(layerId)
LayerEvents.currentLayerChanged.emit()
def getCurrentLayer(self):
return self.mll.getCurrentLayer()
def attachLayerData(self):
self.mll.initLayers()
with self.mll.batchUpdateContext():
self.addLayer('Base Weights')
self.updateLayerAvailability()
selectionState.selectionInfo.dropCache()
def cleanCustomNodes(self):
'''
removes all custom nodes from current scene
'''
# just in case we were in the middle of painting
cmds.setToolTo('selectSuperContext')
LayerUtils.deleteCustomNodes()
# notify the rest of the world
self.updateLayerAvailability()
selectionState.selectionInfo.dropCache()
def getLayerName(self, layerId):
return mel.eval('ngSkinLayer -id {0} -q -name'.format(int(layerId)))
def setLayerName(self, layerId, name):
self.mll.setLayerName(layerId, name)
LayerEvents.nameChanged.emit()
def getLayerOpacity(self, layerId):
return mel.eval('ngSkinLayer -id {0} -q -opacity'.format(layerId))
def getLayerEnabled(self, layerId):
return mel.eval('ngSkinLayer -id {0} -q -enabled'.format(layerId))
def setLayerEnabled(self, layerId, enabled):
cmds.ngSkinLayer(e=True, id=layerId, enabled=1 if enabled else 0)
def toggleLayerEnabled(self, layerId):
self.setLayerEnabled(layerId, not self.getLayerEnabled(layerId))
def getLayersCandidateFromSelection(self):
'''
for given selection, returns mesh and skin cluster node names where skinLayer data
is (or can be) attached.
'''
return self.mll.getTargetInfo()
def getLayersAvailable(self):
self.updateLayerAvailability()
return self.layerDataAvailable
def isDqMode(self):
'''
returns True if current skin cluster is operating in dual quaternion mode
'''
target = self.mll.getTargetInfo()
if not target:
return False
skinCluster = target[1]
return cmds.skinCluster(skinCluster, q=True, skinMethod=True) == 2
