Exemplo n.º 1
0
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
void ConnectIntWeld( vm::CUndo &undo, const MObject &weldNodeObj, const MDagPath &toWeldPath, int nType, int nIntValue, const MMatrix &offsetMatrix )
{
	MFnDependencyNode weldFn( weldNodeObj );
	MFnDagNode toWeldFn( toWeldPath );

	MPlug wiAP = weldFn.findPlug( CVstWeldNode::m_iaWeldInput );
	const uint nWeldIndex = vm::NextAvailable( wiAP );
	MPlug wiP = wiAP.elementByLogicalIndex( nWeldIndex );

	undo.SetAttr( wiP.child( CVstWeldNode::m_iaType ), nType );
	undo.SetAttr( wiP.child( CVstWeldNode::m_iaInt ), nIntValue );

	MFnMatrixData dFn;
	MObject mdObj = dFn.create( offsetMatrix );
	undo.SetAttr( wiP.child( CVstWeldNode::m_iaOffsetMatrix ), mdObj );

	undo.Connect( toWeldFn.findPlug( "parentInverseMatrix" ).elementByLogicalIndex( toWeldPath.instanceNumber() ), wiP.child( CVstWeldNode::m_iaInverseParentSpace ), true );
	undo.Connect( toWeldFn.findPlug( "rotateOrder" ), wiP.child( CVstWeldNode::m_iaRotateOrder ), true );

	MPlug woAP = weldFn.findPlug( CVstWeldNode::m_oaWeldOutput );
	MPlug woP = woAP.elementByLogicalIndex( nWeldIndex );
	MPlug tP = woP.child( CVstWeldNode::m_oaTranslate );

	undo.Connect( tP.child( CVstWeldNode::m_oaTranslateX ), toWeldFn.findPlug( "translateX" ) );
	undo.Connect( tP.child( CVstWeldNode::m_oaTranslateY ), toWeldFn.findPlug( "translateY" ) );
	undo.Connect( tP.child( CVstWeldNode::m_oaTranslateZ ), toWeldFn.findPlug( "translateZ" ) );

	MPlug rP = woP.child( CVstWeldNode::m_oaRotate );

	undo.Connect( rP.child( CVstWeldNode::m_oaRotateX ), toWeldFn.findPlug( "rotateX" ) );
	undo.Connect( rP.child( CVstWeldNode::m_oaRotateY ), toWeldFn.findPlug( "rotateY" ) );
	undo.Connect( rP.child( CVstWeldNode::m_oaRotateZ ), toWeldFn.findPlug( "rotateZ" ) );
}
    //---------------------------------------------------
    // set the bind pose for a transform
    //
    MStatus DagHelper::setBindPoseInverse ( const MObject& node, const MMatrix& bindPoseInverse )
    {
        MStatus status;
        MFnDependencyNode dgFn ( node );
        MPlug bindPosePlug = dgFn.findPlug ( "bindPose", &status );
        if ( status != MS::kSuccess )
        {
            MGlobal::displayWarning ( MString ( "No bindPose found on node " ) + dgFn.name() );
            return status;
        }

        MFnMatrixData matrixFn;
        MObject val = matrixFn.create ( bindPoseInverse.inverse(), &status );
        MObject invval = matrixFn.create ( bindPoseInverse, &status );
        if ( status != MS::kSuccess )
        {
            MGlobal::displayWarning ( MString ( "Error setting bindPose on node " ) + dgFn.name() );
            return status;
        }

        // set the bind pose on the joint itself
        bindPosePlug.setValue ( val );

        // Now, perhaps more significantly, see if there's a
        // skinCluster using this bone and update its bind
        // pose (as the joint bind pose is not connected to
        // the skin - it's set at bind time from the joint's
        // current position, and our importer may not want to
        // disturb the current scene state just to put bones
        // in a bind position before creating skin clusters)
        MObject _node ( node );
        MItDependencyGraph it ( _node, MFn::kSkinClusterFilter );
        while ( !it.isDone() )
        {
            MPlug plug = it.thisPlug();
            unsigned int idx = plug.logicalIndex();
            MFnDependencyNode skinFn ( plug.node() );
            MPlug skinBindPosePlug = skinFn.findPlug ( "bindPreMatrix", &status );

            if ( status == MS::kSuccess )
            {
                // The skinCluster stores inverse inclusive matrix
                // so notice we use invval (the MObject created off
                // the inverse matrix here)
                skinBindPosePlug = skinBindPosePlug.elementByLogicalIndex ( idx );
                skinBindPosePlug.setValue ( invval );
            }

            it.next();
        }

        return status;
    }
    //---------------------------------------------------
    bool DagHelper::setPlugValue ( MPlug& plug, const MMatrix& value )
    {
        MStatus status;
        MFnMatrixData dataCreator;

        MObject matrixData = dataCreator.create ( value, &status );
        if ( status != MStatus::kSuccess ) return false;

        status = plug.setValue ( matrixData );
        if ( status != MStatus::kSuccess ) return false;

        return true;
    }
    //---------------------------------------------------
    bool DagHelper::getPlugValue ( const MPlug& plug, MMatrix& value )
    {
        MStatus status;

        MFnMatrixData mxData;
        MObject object = mxData.create();
        status = plug.getValue ( object );
        if ( status != MStatus::kSuccess ) return false;

        mxData.setObject ( object );
        // MFnMatrixData mxData(o, &status);
        if ( status != MStatus::kSuccess ) return false;

        value = mxData.matrix();

        return true;
    }
Exemplo n.º 5
0
bool ToMayaSkinClusterConverter::doConversion( IECore::ConstObjectPtr from, MObject &to, IECore::ConstCompoundObjectPtr operands ) const
{
    MStatus s;

    IECore::ConstSmoothSkinningDataPtr skinningData = IECore::runTimeCast<const IECore::SmoothSkinningData>( from );
    assert( skinningData );

    const std::vector<std::string> &influenceNames = skinningData->influenceNames()->readable();
    const std::vector<Imath::M44f> &influencePoseData  = skinningData->influencePose()->readable();
    const std::vector<int> &pointIndexOffsets  = skinningData->pointIndexOffsets()->readable();
    const std::vector<int> &pointInfluenceCounts = skinningData->pointInfluenceCounts()->readable();
    const std::vector<int> &pointInfluenceIndices = skinningData->pointInfluenceIndices()->readable();
    const std::vector<float> &pointInfluenceWeights = skinningData->pointInfluenceWeights()->readable();

    MFnDependencyNode fnSkinClusterNode( to, &s );
    MFnSkinCluster fnSkinCluster( to, &s );
    if ( s != MS::kSuccess )
    {
        /// \todo: optional parameter to allow custom node types and checks for the necessary attributes
        /// \todo: create a new skinCluster if we want a kSkinClusterFilter and this isn't one
        throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: \"%s\" is not a valid skinCluster" ) % fnSkinClusterNode.name() ).str() );
    }

    const unsigned origNumInfluences = influenceNames.size();
    unsigned numInfluences = origNumInfluences;
    std::vector<bool> ignoreInfluence( origNumInfluences, false );
    std::vector<int> indexMap( origNumInfluences, -1 );
    const bool ignoreMissingInfluences = m_ignoreMissingInfluencesParameter->getTypedValue();
    const bool ignoreBindPose = m_ignoreBindPoseParameter->getTypedValue();

    // gather the influence objects
    MObject mObj;
    MDagPath path;
    MSelectionList influenceList;
    MDagPathArray influencePaths;
    for ( unsigned i=0, index=0; i < origNumInfluences; i++ )
    {
        MString influenceName( influenceNames[i].c_str() );
        s = influenceList.add( influenceName );
        if ( !s )
        {
            if ( ignoreMissingInfluences )
            {
                ignoreInfluence[i] = true;
                MGlobal::displayWarning( MString( "ToMayaSkinClusterConverter: \"" + influenceName + "\" is not a valid influence" ) );
                continue;
            }

            throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: \"%s\" is not a valid influence" ) % influenceName ).str() );
        }

        influenceList.getDependNode( index, mObj );
        MFnIkJoint fnInfluence( mObj, &s );
        if ( !s )
        {
            if ( ignoreMissingInfluences )
            {
                ignoreInfluence[i] = true;
                influenceList.remove( index );
                MGlobal::displayWarning( MString( "ToMayaSkinClusterConverter: \"" + influenceName + "\" is not a valid influence" ) );
                continue;
            }

            throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: \"%s\" is not a valid influence" ) % influenceName ).str() );
        }

        fnInfluence.getPath( path );
        influencePaths.append( path );
        indexMap[i] = index;
        index++;
    }

    MPlugArray connectedPlugs;

    bool existingBindPose = true;
    MPlug bindPlug = fnSkinClusterNode.findPlug( "bindPose", true, &s );
    if ( !bindPlug.connectedTo( connectedPlugs, true, false ) )
    {
        existingBindPose = false;
        if ( !ignoreBindPose )
        {
            throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: \"%s\" does not have a valid bindPose" ) % fnSkinClusterNode.name() ).str() );
        }
    }

    MPlug bindPoseMatrixArrayPlug;
    MPlug bindPoseMemberArrayPlug;
    if ( existingBindPose )
    {
        MFnDependencyNode fnBindPose( connectedPlugs[0].node() );
        if ( fnBindPose.typeName() != "dagPose" )
        {
            throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: \"%s\" is not a valid bindPose" ) % fnBindPose.name() ).str() );
        }

        bindPoseMatrixArrayPlug = fnBindPose.findPlug( "worldMatrix", true, &s );
        bindPoseMemberArrayPlug = fnBindPose.findPlug( "members", true, &s );
    }

    /// \todo: optional parameter to reset the skinCluster's geomMatrix plug

    // break existing influence connections to the skinCluster
    MDGModifier dgModifier;
    MMatrixArray ignoredPreMatrices;
    MPlug matrixArrayPlug = fnSkinClusterNode.findPlug( "matrix", true, &s );
    MPlug bindPreMatrixArrayPlug = fnSkinClusterNode.findPlug( "bindPreMatrix", true, &s );
    for ( unsigned i=0; i < matrixArrayPlug.numConnectedElements(); i++ )
    {
        MPlug matrixPlug = matrixArrayPlug.connectionByPhysicalIndex( i, &s );
        matrixPlug.connectedTo( connectedPlugs, true, false );
        if ( !connectedPlugs.length() )
        {
            continue;
        }

        MFnIkJoint fnInfluence( connectedPlugs[0].node() );
        fnInfluence.getPath( path );
        if ( ignoreMissingInfluences && !influenceList.hasItem( path ) )
        {
            MPlug preMatrixPlug = bindPreMatrixArrayPlug.elementByLogicalIndex( i );
            preMatrixPlug.getValue( mObj );
            MFnMatrixData matFn( mObj );
            ignoredPreMatrices.append( matFn.matrix() );
            ignoreInfluence.push_back( false );
            indexMap.push_back( influenceList.length() );
            influenceList.add( connectedPlugs[0].node() );
            numInfluences++;
        }
        dgModifier.disconnect( connectedPlugs[0], matrixPlug );
    }
    MPlug lockArrayPlug = fnSkinClusterNode.findPlug( "lockWeights", true, &s );
    for ( unsigned i=0; i < lockArrayPlug.numConnectedElements(); i++ )
    {
        MPlug lockPlug = lockArrayPlug.connectionByPhysicalIndex( i, &s );
        lockPlug.connectedTo( connectedPlugs, true, false );
        if ( connectedPlugs.length() )
        {
            dgModifier.disconnect( connectedPlugs[0], lockPlug );
        }
    }
    MPlug paintPlug = fnSkinClusterNode.findPlug( "paintTrans", true, &s );
    paintPlug.connectedTo( connectedPlugs, true, false );
    if ( connectedPlugs.length() )
    {
        dgModifier.disconnect( connectedPlugs[0], paintPlug );
    }

    // break existing influence connections to the bind pose
    if ( existingBindPose )
    {
        for ( unsigned i=0; i < bindPoseMatrixArrayPlug.numConnectedElements(); i++ )
        {
            MPlug matrixPlug = bindPoseMatrixArrayPlug.connectionByPhysicalIndex( i, &s );
            matrixPlug.connectedTo( connectedPlugs, true, false );
            if ( connectedPlugs.length() )
            {
                dgModifier.disconnect( connectedPlugs[0], matrixPlug );
            }
        }
        for ( unsigned i=0; i < bindPoseMemberArrayPlug.numConnectedElements(); i++ )
        {
            MPlug memberPlug = bindPoseMemberArrayPlug.connectionByPhysicalIndex( i, &s );
            memberPlug.connectedTo( connectedPlugs, true, false );
            if ( connectedPlugs.length() )
            {
                dgModifier.disconnect( connectedPlugs[0], memberPlug );
            }
        }
    }

    if ( !dgModifier.doIt() )
    {
        dgModifier.undoIt();
        throw IECore::Exception( "ToMayaSkinClusterConverter: Unable to break the influence connections" );
    }

    // make connections from influences to skinCluster and bindPose
    for ( unsigned i=0; i < numInfluences; i++ )
    {
        if ( ignoreInfluence[i] )
        {
            continue;
        }

        int index = indexMap[i];
        s = influenceList.getDependNode( index, mObj );
        MFnIkJoint fnInfluence( mObj, &s );
        MPlug influenceMatrixPlug = fnInfluence.findPlug( "worldMatrix", true, &s ).elementByLogicalIndex( 0, &s );
        MPlug influenceMessagePlug = fnInfluence.findPlug( "message", true, &s );
        MPlug influenceBindPosePlug = fnInfluence.findPlug( "bindPose", true, &s );
        MPlug influenceLockPlug = fnInfluence.findPlug( "lockInfluenceWeights", true, &s );
        if ( !s )
        {
            // add the lockInfluenceWeights attribute if it doesn't exist
            MFnNumericAttribute nAttr;
            MObject attribute = nAttr.create( "lockInfluenceWeights", "liw", MFnNumericData::kBoolean, false );
            fnInfluence.addAttribute( attribute );
            influenceLockPlug = fnInfluence.findPlug( "lockInfluenceWeights", true, &s );
        }

        // connect influence to the skinCluster
        MPlug matrixPlug = matrixArrayPlug.elementByLogicalIndex( index );
        MPlug lockPlug = lockArrayPlug.elementByLogicalIndex( index );
        dgModifier.connect( influenceMatrixPlug, matrixPlug );
        dgModifier.connect( influenceLockPlug, lockPlug );

        // connect influence to the bindPose
        if ( !ignoreBindPose )
        {
            MPlug bindPoseMatrixPlug = bindPoseMatrixArrayPlug.elementByLogicalIndex( index );
            MPlug memberPlug = bindPoseMemberArrayPlug.elementByLogicalIndex( index );
            dgModifier.connect( influenceMessagePlug, bindPoseMatrixPlug );
            dgModifier.connect( influenceBindPosePlug, memberPlug );
        }
    }
    unsigned firstIndex = find( ignoreInfluence.begin(), ignoreInfluence.end(), false ) - ignoreInfluence.begin();
    influenceList.getDependNode( firstIndex, mObj );
    MFnDependencyNode fnInfluence( mObj );
    MPlug influenceMessagePlug = fnInfluence.findPlug( "message", true, &s );
    dgModifier.connect( influenceMessagePlug, paintPlug );
    if ( !dgModifier.doIt() )
    {
        dgModifier.undoIt();
        throw IECore::Exception( "ToMayaSkinClusterConverter: Unable to create the influence connections" );
    }

    // use influencePoseData as bindPreMatrix
    for ( unsigned i=0; i < numInfluences; i++ )
    {
        if ( ignoreInfluence[i] )
        {
            continue;
        }

        MMatrix preMatrix = ( i < origNumInfluences ) ? IECore::convert<MMatrix>( influencePoseData[i] ) : ignoredPreMatrices[i-origNumInfluences];
        MPlug preMatrixPlug = bindPreMatrixArrayPlug.elementByLogicalIndex( indexMap[i], &s );
        s = preMatrixPlug.getValue( mObj );
        if ( s )
        {
            MFnMatrixData matFn( mObj );
            matFn.set( preMatrix );
            mObj = matFn.object();
        }
        else
        {
            MFnMatrixData matFn;
            mObj = matFn.create( preMatrix );
        }

        preMatrixPlug.setValue( mObj );
    }

    // remove unneeded bindPreMatrix children
    unsigned existingElements = bindPreMatrixArrayPlug.numElements();
    for ( unsigned i=influenceList.length(); i < existingElements; i++ )
    {
        MPlug preMatrixPlug = bindPreMatrixArrayPlug.elementByLogicalIndex( i, &s );
        /// \todo: surely there is a way to accomplish this in c++...
        MGlobal::executeCommand( ( boost::format( "removeMultiInstance %s" ) % preMatrixPlug.name() ).str().c_str() );
    }

    // get the geometry
    MObjectArray outputGeoObjs;
    if ( !fnSkinCluster.getOutputGeometry( outputGeoObjs ) )
    {
        throw IECore::Exception( ( boost::format( "ToMayaSkinClusterConverter: skinCluster \"%s\" does not have any output geometry!" ) % fnSkinCluster.name() ).str() );
    }
    MFnDagNode dagFn( outputGeoObjs[0] );
    MDagPath geoPath;
    dagFn.getPath( geoPath );

    // loop through all the points of the geometry and set the weights
    MItGeometry geoIt( outputGeoObjs[0] );
    MPlug weightListArrayPlug = fnSkinClusterNode.findPlug( "weightList", true, &s );
    for ( unsigned pIndex=0; !geoIt.isDone(); geoIt.next(), pIndex++ )
    {
        MPlug pointWeightsPlug = weightListArrayPlug.elementByLogicalIndex( pIndex, &s ).child( 0 );

        // remove existing influence weight plugs
        MIntArray existingInfluenceIndices;
        pointWeightsPlug.getExistingArrayAttributeIndices( existingInfluenceIndices );
        for( unsigned i=0; i < existingInfluenceIndices.length(); i++ )
        {
            MPlug influenceWeightPlug = pointWeightsPlug.elementByLogicalIndex( existingInfluenceIndices[i], &s );
            MGlobal::executeCommand( ( boost::format( "removeMultiInstance -break 1 %s" ) % influenceWeightPlug.name() ).str().c_str() );
        }

        // add new influence weight plugs
        int firstIndex = pointIndexOffsets[pIndex];
        for( int i=0; i < pointInfluenceCounts[pIndex]; i++ )
        {
            int influenceIndex = pointInfluenceIndices[ firstIndex + i ];
            if ( ignoreInfluence[ influenceIndex ] )
            {
                continue;
            }

            int skinClusterInfluenceIndex = fnSkinCluster.indexForInfluenceObject( influencePaths[ indexMap[ influenceIndex ] ] );
            MPlug influenceWeightPlug = pointWeightsPlug.elementByLogicalIndex( skinClusterInfluenceIndex, &s );
            influenceWeightPlug.setValue( pointInfluenceWeights[ firstIndex + i ] );
        }
    }

    return true;
}
Exemplo n.º 6
0
MStatus puttyNode::deform( MDataBlock& block, MItGeometry& iter, const MMatrix& worldMatrix, unsigned int multiIndex)
{
//	MGlobal::displayInfo("deform");
    MStatus status = MS::kSuccess;

    /////////////////////////////////////////////////////////////////////////////////////////////////
    //
    // get inputs
    //
	
	// get the node ready flag
	MDataHandle dh = block.inputValue(aScriptSourced,&status);
	SYS_ERROR_CHECK(status, "Error getting aScriptSourced data handle\n");
	bool scriptSourced = dh.asBool();
	if (!scriptSourced)
		return MS::kSuccess;


	dh = block.inputValue(aNodeReady,&status);
	SYS_ERROR_CHECK(status, "Error getting node ready data handle\n");
	bool nodeReady = dh.asBool();

	// if it's not ready, don't do anything
	if (!nodeReady)
		return MS::kSuccess;

    dh = block.inputValue(aDefSpace,&status);
    SYS_ERROR_CHECK(status, "Error getting defSpace data handle\n");
    short defSpace = dh.asShort();
    
    dh = block.inputValue(aDefWeights,&status);
    SYS_ERROR_CHECK(status, "Error getting defWeights data handle\n");
    short defWeights = dh.asShort();
 
    dh = block.inputValue(aDefEnvelope,&status);
    SYS_ERROR_CHECK(status, "Error getting defEnvelope data handle\n");
    short defEnvelope = dh.asShort();
    

    
    // get the command
    dh = block.inputValue(aCmdBaseName,&status);
    SYS_ERROR_CHECK(status, "Error getting aCmdBaseName  handle\n");    
    MString script =  dh.asString(); 
        
 /*   if (script == "")
    {
        status = MS::kFailure;
        USER_ERROR_CHECK(status, "no script provided!\n");    
    }
   */ 
    /////////////////////////////////////////////////////////////////////////////////////////////////
    //
    // build mel cmd string
    //
    
    // check if it's a valid cmd
        
   
    // get the envelope
    //
    double env = 1;
    
    if (defEnvelope == MSD_ENVELOPE_AUTO)
    {
        dh = block.inputValue(envelope,&status);
    	SYS_ERROR_CHECK(status, "Error getting envelope data handle\n");	
	    env = double(dh.asFloat());	
        
        // early stop 'cause there is nothing more to do
        if (env == 0.0)
            return MS::kSuccess;
    }
    
    // get the points, transform them into the right space if needed
    //
    int count = iter.count();
    MVectorArray points(count);
    for ( ; !iter.isDone(); iter.next()) 
        points[iter.index()] = iter.position();
        
    if ( defSpace == MSD_SPACE_WORLD )
    {
        for (int i = 0;i<count;i++)
            points[i] = MPoint(points[i]) * worldMatrix;
    }
    
    
    // get the weights
    //
    MDoubleArray weights;
    if ( defWeights == MSD_WEIGHTS_AUTO)
    {
        weights.setLength(count);
        
        for (int i = 0;i<count;i++)
            weights[i]  = weightValue(block,multiIndex,i);
        
    }


    // get the object name and type
    // get the input geometry, traverse through the data handles    
    MArrayDataHandle adh = block.outputArrayValue( input, &status );
    SYS_ERROR_CHECK(status,"error getting input array data handle.\n");

    status = adh.jumpToElement( multiIndex );
    SYS_ERROR_CHECK(status, "input jumpToElement failed.\n");

    // compound data 
    MDataHandle cdh = adh.inputValue( &status );
    SYS_ERROR_CHECK(status, "error getting input inputValue\n");
   
    // input geometry child
    dh = cdh.child( inputGeom );
    MObject dInputGeometry = dh.data();
   
    // get the type      
    MString geometryType = dInputGeometry.apiTypeStr();

    // get the name    
//    MFnDagNode dagFn( dInputGeometry, &status);
//    SYS_ERROR_CHECK(status, "error converting geometry obj to dag node\n");
   
//    MString geometryName = dagFn.fullPathName(&status);
//    SYS_ERROR_CHECK(status, "error getting full path name \n");

//    MString geometryType = "";
//    MString geometryName = "";
    
    /////////////////////////////////////////////////////////////////////////////////////////////////
    //  
    //  set the current values on the temp plugs for the script to be picked up
    //
    
    // the position
    MObject thisNode = thisMObject();
    
    MPlug currPlug(thisNode,aCurrPosition);
    MFnVectorArrayData vecD;
    MObject currObj = vecD.create(points,&status);
    currPlug.setValue(currObj);
    SYS_ERROR_CHECK(status, "error setting currPosPlug value\n");
    
    // the weights
    currPlug =MPlug(thisNode,aCurrWeight);
    MFnDoubleArrayData dblD;
    currObj = dblD.create(weights,&status);
    currPlug.setValue(currObj);
    SYS_ERROR_CHECK(status, "error setting currWeightsPlug value\n");
    
    // world matrix
    currPlug =MPlug(thisNode,aCurrWorldMatrix);
    MFnMatrixData matD;
    currObj = matD.create(worldMatrix,&status);
    currPlug.setValue(currObj);
    SYS_ERROR_CHECK(status, "error setting currWorldMatrixPlug value\n");

    // the multi index
    currPlug =MPlug(thisNode,aCurrMultiIndex);
    currPlug.setValue(int(multiIndex));
    SYS_ERROR_CHECK(status, "error setting currMultiIndexPlug value\n");
    
    // geometry name/type
//    currPlug =MPlug(thisNode,aCurrGeometryName);
//    currPlug.setValue(geometryName);
//    SYS_ERROR_CHECK(status, "error setting aCurrGeometryName value\n");

    currPlug =MPlug(thisNode,aCurrGeometryType);
    currPlug.setValue(geometryType);
    SYS_ERROR_CHECK(status, "error setting aCurrGeometryType value\n");

   
    /////////////////////////////////////////////////////////////////////////////////////////////////
    //
    // execute the mel script
    //
    MString melCmd = script+"(\"" +name()+"\","+count+")";
    
    MCommandResult melResult;
    status = MGlobal::executeCommand(melCmd,melResult);
	
	// if the command did not work, then try to resource the script
	// (might have been that we were in a fresh scene and nothing was ready yet
	if (status != MS::kSuccess)
	{
		dh = block.inputValue(aScript,&status);
	    SYS_ERROR_CHECK(status, "Error getting aCmdBaseName  handle\n");    
		MString scriptFile =  dh.asString(); 	

		// try to source the script
		MString cmd = "source \"" + scriptFile+"\"";
			
		MCommandResult melResult;
		status = MGlobal::executeCommand(cmd,melResult);
		// if successfull, retry the command 
		if (!status.error())
		{
			status = MGlobal::executeCommand(melCmd,melResult);
		}
	}

	USER_ERROR_CHECK(status, "Error executing mel command, please check the function you provided is valid, error free and has the appropriate parameters!");

    // check the result type
    if ((melResult.resultType()) != (MCommandResult::kDoubleArray))
    {
        USER_ERROR_CHECK(MS::kFailure, "result of mel command has wrong type, should be doubleArray (which will be interpreted as vectorArray)!");
    }
    
    // get the result as a double array
    MDoubleArray newP;  
    status = melResult.getResult(newP);
    USER_ERROR_CHECK(status, "Error getting result of mel command!");
    
    int newCount = newP.length()/3;
    // size check
    if (newCount != count)
    {
        USER_ERROR_CHECK(MS::kFailure, "the size of the result does not match the size of the input!");
    }

    // convert the double array into a vector array
    MPointArray newPoints(newCount);
    
    for(int i=0;i<newCount;i++)
        newPoints[i]=MPoint(newP[i*3],newP[i*3+1],newP[i*3+2]);
    
    /////////////////////////////////////////////////////////////////////////////////////////////////
    //
    // interprete and apply the result
    //


  
    // do the envelope and weights   
    if ((defEnvelope == MSD_ENVELOPE_AUTO)||((defWeights == MSD_WEIGHTS_AUTO)))
    {
        MDoubleArray envPP(count, env);
    
        if (defWeights == MSD_WEIGHTS_AUTO)
        { 
            for (int i = 0;i<count;i++)
                envPP[i] *= weights[i];
        }

        // linear interpolation between old and new points
        for (int i = 0;i<count;i++)
            newPoints[i] = (points[i] * (1-envPP[i])) + (newPoints[i] * envPP[i]);
    }


    // retransform the result if it was in world space
    if ( defSpace == MSD_SPACE_WORLD )
    {
        MMatrix worldMatrixInv = worldMatrix.inverse();
        
        for (int i = 0;i<count;i++)
            newPoints[i] *= worldMatrixInv;
    }
 
 
    // set the points    
    iter.reset();
  	for ( ; !iter.isDone(); iter.next()) 
     	iter.setPosition(newPoints[iter.index()]);    

    return status;
}