It looks like in some of your code you're referencing it as `twistYAttribute` but in other places as `twistYAttr` which appears to be the correct spelling.
On Tuesday, November 19, 2019 at 4:06:58 AM UTC-6, blossom ghuntla wrote: > > Hello All, > > I autodidact basic python, basic maya.cmds, basic qt just for the sake of > learning to create a deformer and i am not doing good at all > > i referred > https://help.autodesk.com/view/MAYAUL/2017/ENU/?guid=__cpp_ref_y_twist_node_2y_twist_node_8cpp_example_html > > > # defTwist.py > > import sys > import maya.OpenMayaMPx as OpenMayaMPx > import maya.OpenMaya as OpenMaya > import maya.cmds as cmds > import math > > # Plug-in information: > kPluginNodeName = "twistDeformer" # The name of the node. > kPluginNodeId = OpenMaya.MTypeId( 0xBEEF8 ) # A unique ID associated to > this node type. > > # Some global variables were moved from MPxDeformerNode to > MPxGeometryFilter. > # Set som constants to the proper C++ cvars based on the API version > kApiVersion = cmds.about(apiVersion=True) > if kApiVersion < 201600: > kInput = OpenMayaMPx.cvar.MPxDeformerNode_input > kInputGeom = OpenMayaMPx.cvar.MPxDeformerNode_inputGeom > kOutputGeom = OpenMayaMPx.cvar.MPxDeformerNode_outputGeom > kEnvelope = OpenMayaMPx.cvar.MPxDeformerNode_envelope > else: > kInput = OpenMayaMPx.cvar.MPxGeometryFilter_input > kInputGeom = OpenMayaMPx.cvar.MPxGeometryFilter_inputGeom > kOutputGeom = OpenMayaMPx.cvar.MPxGeometryFilter_outputGeom > kEnvelope = OpenMayaMPx.cvar.MPxGeometryFilter_envelope > > > > class MyDeformerNode(OpenMayaMPx.MPxDeformerNode): > > # Static variable(s) which will later be replaced by the node's > attribute(s). > twistYAttr = OpenMaya.MObject() > > def __init__(self): > ''' Constructor. ''' > # (!) Make sure you call the base class's constructor. > OpenMayaMPx.MPxDeformerNode.__init__(self) > > def deform(self, pDataBlock, pGeometryIterator, pLocalToWorldMatrix, > pGeometryIndex): > ''' Deform each vertex using the geometry iterator. ''' > > # The envelope determines the overall weight of the deformer on the mesh. > # The envelope is obtained via the > OpenMayaMPx.cvar.MPxDeformerNode_envelope (pre Maya 2016) or > # OpenMayaMPx.cvar.MPxGeometryFilter_envelope (Maya 2016) variable. > # This variable and others like it are generated by SWIG to expose > variables or constants declared in C++ header files. > envelopeAttribute = kEnvelope > envelopeValue = pDataBlock.inputValue( envelopeAttribute ).asFloat() > > # Get the value of the mesh twist node attribute. > twistYAttribute = pDataBlock.inputValue( MyDeformerNode.twistYAttr ) > twistYAttributeType = meshInflationHandle.asDouble() > > # Get the input mesh from the datablock using our > getDeformerInputGeometry() helper function. > inputGeometryObject = self.getDeformerInputGeometry(pDataBlock, > pGeometryIndex) > > # Obtain the list of normals for each vertex in the mesh. > normals = OpenMaya.MFloatVectorArray() > meshFn = OpenMaya.MFnMesh( inputGeometryObject ) > meshFn.getVertexNormals( True, normals, OpenMaya.MSpace.kObject ) > > > def getDeformerInputGeometry(self, pDataBlock, pGeometryIndex): > ''' > Obtain a reference to the input mesh. This mesh will be used to compute > our bounding box, and we will also require its normals. > > We use MDataBlock.outputArrayValue() to avoid having to recompute the mesh > and propagate this recomputation throughout the > Dependency Graph. > > OpenMayaMPx.cvar.MPxDeformerNode_input and > OpenMayaMPx.cvar.MPxDeformerNode_inputGeom (for pre Maya 2016) and > OpenMayaMPx.cvar.MPxGeometryFilter_input and > OpenMayaMPx.cvar.MPxGeometryFilter_inputGeom (Maya 2016) are SWIG-generated > variables which respectively contain references to the deformer's 'input' > attribute and 'inputGeom' attribute. > ''' > inputAttribute = OpenMayaMPx.cvar.MPxGeometryFilter_input > inputGeometryAttribute = OpenMayaMPx.cvar.MPxGeometryFilter_inputGeom > > inputHandle = pDataBlock.outputArrayValue( inputAttribute ) > inputHandle.jumpToElement( pGeometryIndex ) > inputGeometryObject = inputHandle.outputValue().child( > inputGeometryAttribute ).asMesh() > > return inputGeometryObject > > > ########################################################## > # Plug-in initialization. > ########################################################## > def nodeCreator(): > ''' Creates an instance of our node class and delivers it to Maya as a > pointer. ''' > return OpenMayaMPx.asMPxPtr( MyDeformerNode() ) > > def nodeInitializer(): > ''' Defines the input and output attributes as static variables in our > plug-in class. ''' > # The following MFnNumericAttribute function set will allow us to create > our attributes. > numericAttributeFn = OpenMaya.MFnNumericAttribute() > > #================================== > # INPUT NODE ATTRIBUTE(S) > #================================== > > # Define a mesh inflation attribute, responsible for actually moving the > vertices in the direction of their normals. > MyDeformerNode.meshInflationAttribute = numericAttributeFn.create( > 'ytwist', 'yt', OpenMaya.MFnNumericData.kDouble, 10.0 ) > > numericAttributeFn.setDefault(0.0) > numericAttributeFn.setKeyable(True) > MyDeformerNode.addAttribute( MyDeformerNode.twistYAttribute ) > > ''' The input geometry node attribute is already declared in > OpenMayaMPx.cvar.MPxGeometryFilter_inputGeom ''' > > #================================== > # OUTPUT NODE ATTRIBUTE(S) > #================================== > > ''' The output geometry node attribute is already declared in > OpenMayaMPx.cvar.MPxGeometryFilter_outputGeom ''' > > #================================== > # NODE ATTRIBUTE DEPENDENCIES > #================================== > # If any of the inputs change, the output mesh will be recomputed. > > print dir(OpenMayaMPx.cvar) > > MyDeformerNode.attributeAffects( MyDeformerNode.twistYAttr, kOutputGeom ) > > > > def initializePlugin( mobject ): > ''' Initialize the plug-in ''' > mplugin = OpenMayaMPx.MFnPlugin( mobject ) > try: > mplugin.registerNode( kPluginNodeName, kPluginNodeId, nodeCreator, > nodeInitializer, > OpenMayaMPx.MPxNode.kDeformerNode ) > except: > sys.stderr.write( 'Failed to register node: ' + kPluginNodeName ) > raise > > def uninitializePlugin( mobject ): > ''' Uninitializes the plug-in ''' > mplugin = OpenMayaMPx.MFnPlugin( mobject ) > try: > mplugin.deregisterNode( kPluginNodeId ) > except: > sys.stderr.write( 'Failed to deregister node: ' + kPluginNodeName ) > raise > > and tried translating losing all hope i searched online for twist python > reference below is the link > > https://download.autodesk.com/us/maya/2009help/API/y_twist_node_8py-example.html > > I want this so badly i dont get it why its not executing and when i try > executing > > https://help.autodesk.com/view/MAYAUL/2017/ENU/?guid=__files_GUID_10CE99A6_2C32_49E1_85ED_2E2F6782CF23_htm > works like a charm > > let me know if any correction are needed in the script or anything i need > to study, as i am interested in learning api > // Error: file: > /builds/maya_runtime/6b3b073194/scripts/others/pluginWin.mel line 909: type > object 'MyDeformerNode' has no attribute 'twistYAttribute' > # Traceback (most recent call last): > # File "/u/bghu/PycharmProjects/scripts/twistDeformer.py", line 104, in > nodeInitializer > # MyDeformerNode.addAttribute( MyDeformerNode.twistYAttribute ) > # AttributeError: type object 'MyDeformerNode' has no attribute > 'twistYAttribute' // > // Warning: file: > /builds/maya_runtime/6b3b073194/scripts/others/pluginWin.mel line 909: > Failed to call script creator function // > > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. 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