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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