meshRemapCmd.cpp

//-
// ==========================================================================
// Copyright 1995,2006,2008 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk
// license agreement provided at the time of installation or download,
// or which otherwise accompanies this software in either electronic
// or hard copy form.
// ==========================================================================
//+

#include "meshRemapCmd.h"
#include "meshMapUtils.h"

#include <maya/MItSelectionList.h>
#include <maya/MItMeshPolygon.h>
#include <maya/MArgList.h>
#include <maya/MStatus.h>
#include <maya/MFnMesh.h>
#include <maya/MDagPathArray.h>
#include <maya/MObjectArray.h>
#include <maya/MIOStream.h>


// CONSTRUCTOR DEFINITION:
meshRemapCommand::meshRemapCommand()
{
        fColorArrays = NULL;
        fRepArray = NULL;
        fClampedArray = NULL;
        fUArrays = NULL;
        fVArrays = NULL;
        fUVCountsArrays = NULL;
        fUVIdsArrays = NULL;
}


// DESTRUCTOR DEFINITION:
meshRemapCommand::~meshRemapCommand()
{
        reset();
}


// METHOD FOR CREATING AN INSTANCE OF THIS COMMAND:
void* meshRemapCommand::creator()
{
        return new meshRemapCommand;
}


MStatus meshRemapCommand::parseArgs(const MArgList& args)
{
        MSelectionList list;
        MString err;
        MStatus stat; 

        if( args.length() != 6 )
        {
                displayError("6 vertices must be specified");
                return MS::kFailure;
        }

        int argIdx = 0;
        for (unsigned int i = 0; i < 2; i++)
        {
                MObjectArray selectedComponent(3);
                MDagPathArray selectedPath;

                selectedPath.setLength(3);

                for (unsigned int j = 0; j < 3; j++)
                {
                        MString arg;

                        if( ( stat = args.get( argIdx, arg )) != MStatus::kSuccess )
                        {
                                displayError( "Can't parse arg");
                                return stat;
                        }

                        list.clear();   
                        if (! list.add( arg ) )
                        {
                                err = arg + ": no such component";
                                displayError(err);
                                return MS::kFailure; // no such component
                        }

                        MItSelectionList selectionIt (list, MFn::kComponent);
                        if (selectionIt.isDone ())
                        {
                                err = arg + ": not a component";
                                displayError (err);
                                return MS::kFailure;
                        }

                        if( selectionIt.getDagPath (selectedPath[j], selectedComponent[j]) != MStatus::kSuccess )
                        {
                                displayError( "Can't get path for");
                                return stat;
                        }


                        if (!selectedPath[j].node().hasFn(MFn::kMesh) && !(selectedPath[j].node().hasFn(MFn::kTransform) && selectedPath[j].hasFn(MFn::kMesh)))
                        {
                                err = arg + ": Invalid type!  Only a mesh or its transform can be specified!";
                                displayError (err);
                                return MStatus::kFailure;
                        }

                        argIdx++;
                }

                if( i == 0 )
                {
                        if( ( stat = meshMapUtils::validateFaceSelection( selectedPath, selectedComponent, &fFaceIdxSrc, &fFaceVtxSrc ) ) != MStatus::kSuccess )
                        {
                                displayError("Selected vertices don't define a unique face on source mesh");
                                return stat;
                        }

                        fDagPathSrc = selectedPath[0];
                }
                else
                {
                        if( ( stat = meshMapUtils::validateFaceSelection( selectedPath, selectedComponent, &fFaceIdxDst, &fFaceVtxDst ) ) != MStatus::kSuccess )
                        {
                                displayError("Selected vertices don't define a unique face on target mesh");
                                return stat;
                        }

                        fDagPathDst = selectedPath[0];
                }
        }


        if( fDagPathSrc == fDagPathDst )
        {
                displayError("Cannot use one mesh for both source and target");
                return stat;
        }

        return MStatus::kSuccess;
}


// FIRST INVOKED WHEN COMMAND IS CALLED, PARSING THE COMMAND ARGUMENTS, INITIALIZING DEFAULT PARAMETERS, THEN CALLING redoIt():
MStatus meshRemapCommand::doIt(const MArgList& args)
{
        MStatus  stat = MStatus::kSuccess;

        if ( ( stat = parseArgs( args ) ) != MStatus::kSuccess )
        {
                displayError ("Error parsing arguments");
                return stat;
        }

        return redoIt();
}

MStatus meshRemapCommand::redoIt()
{
        int i;
        MStatus  stat = MStatus::kSuccess;

        fDagPathSrc.extendToShape();
        MFnMesh theMeshSrc( fDagPathSrc, &stat );
        if( stat != MStatus::kSuccess )
        {
                displayError(" MFnMesh creation");
                return stat;
        }

        MFloatPointArray        origVertices;
        stat = theMeshSrc.getPoints (origVertices, MSpace::kObject );
        if( stat != MStatus::kSuccess )
        {
                displayError(" MFnMesh getPoints");
                return stat;
        }

        // 
        // Traverse the source
        //
        
        // 
        // Initialize the traversal flags and CV mappings for this shape 
        MIntArray                       faceTraversal( theMeshSrc.numPolygons(), false );
        MIntArray                       cvMapping( theMeshSrc.numVertices(), -1 );
        MIntArray                       cvMappingInverse( theMeshSrc.numVertices(), -1 ); 

        //
        //  Starting with the user selected face, recursively rebuild the entire mesh
        //

        MIntArray                       newPolygonCounts;
        MIntArray                       newPolygonConnects;
        MFloatPointArray        newVertices;

        stat = meshMapUtils::traverseFace( fDagPathSrc, fFaceIdxSrc, fFaceVtxSrc[0], fFaceVtxSrc[1], faceTraversal,
                                        cvMapping, cvMappingInverse, 
                                        newPolygonCounts, newPolygonConnects, 
                                        origVertices, newVertices );
        if ( stat != MStatus::kSuccess )
        {
                displayError(" could not process all the mesh faces.");
                return stat;
        }

        // reuse newPolygonCounts and newPolygonConnects for the src mesh.
        newPolygonCounts.clear();
        newPolygonConnects.clear();
        MItMeshPolygon polyIter(fDagPathSrc.node());
        while(!polyIter.isDone()) 
        {
                newPolygonCounts.append(polyIter.polygonVertexCount());
                for(i = 0; i < (int) polyIter.polygonVertexCount(); i++)
                {
                        newPolygonConnects.append(polyIter.vertexIndex(i));
                }
                polyIter.next();
        }

        // 
        // Now, traverse the destination
        //
        
        fDagPathDst.extendToShape();
        MFnMesh theMeshDst( fDagPathDst, &stat );
        if( stat != MStatus::kSuccess )
        {
                displayError(" MFnMesh creation");
                return stat;
        }

        MFloatPointArray        origVerticesDst;
        stat = theMeshDst.getPoints (origVerticesDst, MSpace::kObject );
        if( stat != MStatus::kSuccess )
        {
                displayError(" MFnMesh getPoints");
                return stat;
        }

        // Initialize the traversal flags and CV mappings for this shape 
        MIntArray                       faceTraversalDst( theMeshDst.numPolygons(), false );
        MIntArray                       cvMappingDst( theMeshDst.numVertices(), -1 );
        MIntArray                       cvMappingInverseDst( theMeshDst.numVertices(), -1 ); 

        //
        //  Starting with the user selected face, recursively rebuild the entire mesh
        //

        MIntArray                       newPolygonCountsDst;
        MIntArray                       newPolygonConnectsDst;
        MFloatPointArray        newVerticesDst;

        stat = meshMapUtils::traverseFace( fDagPathDst, fFaceIdxDst, fFaceVtxDst[0], fFaceVtxDst[1], faceTraversalDst,
                                        cvMappingDst, cvMappingInverseDst, 
                                        newPolygonCountsDst, newPolygonConnectsDst, 
                                        origVerticesDst, newVerticesDst );
        if ( stat != MStatus::kSuccess )
        {
                displayError(" could not process all the mesh faces.");
                return stat;
        }

        //
        // Use the generated maps to build a new CV list that will remap
        // the destination to the source topology
        //
        for( i = 0; i < theMeshDst.numVertices(); i++ )
        {
                newVerticesDst[cvMappingInverse[i]] = origVerticesDst[cvMappingInverseDst[i]];
        }

        // Prepare for undo. Must collect the mesh information here before it is modified by createInPlace() call.
        fVertices.copy(origVerticesDst);
        MItMeshPolygon polyIterDst(fDagPathDst.node());
        while(!polyIterDst.isDone()) 
        {
                fPolygonCounts.append(polyIterDst.polygonVertexCount());
                for(i = 0; i < (int)polyIterDst.polygonVertexCount(); i++)
                {
                        fPolygonConnects.append(polyIterDst.vertexIndex(i));
                }
                polyIterDst.next();
        }

        // Store Colors for undo
        fColorSetNames.clear();
        theMeshDst.getColorSetNames(fColorSetNames);
        int numColorSets = fColorSetNames.length();
        fClampedArray = new bool[numColorSets];
        fRepArray = new MFnMesh::MColorRepresentation[numColorSets];
        fColorArrays = new MColorArray[numColorSets];

        for ( i = 0; i < numColorSets; i++ ) 
        {
                fClampedArray[i] = theMeshDst.isColorClamped(fColorSetNames[i]);
                fRepArray[i] = theMeshDst.getColorRepresentation(fColorSetNames[i]);
                theMeshDst.getVertexColors(fColorArrays[i], &(fColorSetNames[i]));
        }

        // Store UVs for undo
        fUVSetNames.clear();
        theMeshDst.getUVSetNames(fUVSetNames);
        int numUVSets = fUVSetNames.length();
        fUArrays = new MFloatArray[numUVSets];
        fVArrays = new MFloatArray[numUVSets];
        fUVIdsArrays = new MIntArray[numUVSets];
        fUVCountsArrays = new MIntArray[numUVSets];
        fUVIdsArrays = new MIntArray[numUVSets];

        for ( i = 0; i < numUVSets; i++ ) 
        {
                theMeshDst.getAssignedUVs(fUVCountsArrays[i], fUVIdsArrays[i], &(fUVSetNames[i]));
                theMeshDst.getUVs(fUArrays[i], fVArrays[i], &(fUVSetNames[i]));
        }

        //
        //  Create the mesh. The old approach of using copyInPlace is doing referenced counting of the mesh, which is
        //  not what we want and has caused strange problem, i.e. reorder not working on a remapped mesh.
        // 
        stat = theMeshDst.createInPlace( newVerticesDst.length(), newPolygonCounts.length(), newVerticesDst, newPolygonCounts, newPolygonConnects );
        if ( stat != MStatus::kSuccess )
        {
                displayError(" mesh copy failed.");
                reset();
                return stat;
        }

        // Copy Colors from src to dst mesh
        MStringArray colorSetNamesSrc;
        theMeshSrc.getColorSetNames(colorSetNamesSrc);
        int numColorSetsSrc = colorSetNamesSrc.length();
        for (i = 0; i < numColorSetsSrc; i++) 
        {
                MIntArray mapping(fVertices.length());;
                if (i == 0) 
                {
                        for (unsigned j = 0; j < fVertices.length(); j++) 
                        {
                                mapping[j] = j;
                        }
                }

                MColorArray colorArraySrc;
                bool        clampedSrc;
                MFnMesh::MColorRepresentation repSrc;
                clampedSrc = theMeshSrc.isColorClamped(colorSetNamesSrc[i]);
                repSrc = theMeshSrc.getColorRepresentation(colorSetNamesSrc[i]);
                theMeshSrc.getVertexColors(colorArraySrc, &(colorSetNamesSrc[i]));

                theMeshDst.createColorSet(colorSetNamesSrc[i], NULL, clampedSrc, repSrc);
                if (colorArraySrc.length() > 0 && colorArraySrc.length() == fVertices.length())
                {
                        theMeshDst.setVertexColors(colorArraySrc, mapping, NULL, repSrc);
                }
        }

        // Copy UVs from src to dst mesh
        MStringArray uvSetNamesSrc;
        theMeshSrc.getUVSetNames(uvSetNamesSrc);
        int numUVSetsSrc = uvSetNamesSrc.length();
        MString defaultUVSetName;
        theMeshDst.getCurrentUVSetName(defaultUVSetName);
        for (i = 0; i < numUVSetsSrc; i++) 
        {
                MFloatArray uArraySrc;
                MFloatArray vArraySrc;
                theMeshSrc.getUVs(uArraySrc, vArraySrc, &(uvSetNamesSrc[i]));

                if (uvSetNamesSrc[i] != defaultUVSetName) 
                {
                        theMeshDst.createUVSet(uvSetNamesSrc[i]);
                }
                if (uArraySrc.length() > 0 && uArraySrc.length() == vArraySrc.length())
                {
                        theMeshDst.setUVs(uArraySrc, vArraySrc, &(uvSetNamesSrc[i]));
                        MIntArray uvCounts;
                        MIntArray uvIds;
                        theMeshSrc.getAssignedUVs(uvCounts, uvIds, &(uvSetNamesSrc[i]));
                        theMeshDst.assignUVs(uvCounts, uvIds, &(uvSetNamesSrc[i]));
                }
        }

        return stat;
}

MStatus meshRemapCommand::undoIt()
{
        int i;
        MStatus  stat = MStatus::kSuccess;
        MFnMesh theMesh( fDagPathDst );

        stat = theMesh.createInPlace( fVertices.length(), fPolygonCounts.length(), fVertices, fPolygonCounts, fPolygonConnects );

        // Restore Colors from cached data for undo
        int numColorSets = fColorSetNames.length();
        for (i = 0; i < numColorSets; i++) 
        {
                MIntArray mapping(fVertices.length());;
                if (i == 0) 
                {
                        for (unsigned j = 0; j < fVertices.length(); j++) 
                        {
                                mapping[j] = j;
                        }
                }

                theMesh.createColorSet(fColorSetNames[i], NULL, fClampedArray[i], fRepArray[i]);
                if (fColorArrays[i].length() > 0 && fColorArrays[i].length() == fVertices.length())
                {
                        theMesh.setVertexColors(fColorArrays[i], mapping, NULL, fRepArray[i]);
                }
        }

        // Restore UVs from cached data for undo
        int numUVSets = fUVSetNames.length();
        MString defaultUVSetName;
        theMesh.getCurrentUVSetName(defaultUVSetName);
        for (i = 0; i < numUVSets; i++) 
        {
                if (fUVSetNames[i] != defaultUVSetName)
                {
                        theMesh.createUVSet(fUVSetNames[i]);
                }
                if (fUArrays[i].length() > 0 && fUArrays[i].length() == fVArrays[i].length())
                {
                        theMesh.setUVs(fUArrays[i], fVArrays[i], &(fUVSetNames[i]));
                        theMesh.assignUVs(fUVCountsArrays[i], fUVIdsArrays[i], &(fUVSetNames[i]));
                }
        }

        reset();

        return stat;
}

void meshRemapCommand::reset()
{
        fVertices.clear();
        fPolygonCounts.clear();
        fPolygonConnects.clear();

        fColorSetNames.clear();
        fUVSetNames.clear();
        if (fClampedArray != NULL)
        {
                delete [] fClampedArray;
                fClampedArray = NULL;
        }
        if (fRepArray != NULL)
        {
                delete [] fRepArray;
                fRepArray = NULL;
        }
        if (fUArrays != NULL)
        {
                delete [] fUArrays;
                fUArrays = NULL;
        }
        if (fVArrays != NULL)
        {
                delete [] fVArrays;
                fVArrays = NULL;
        }
        if (fColorArrays != NULL)
        {
                delete [] fColorArrays;
                fColorArrays = NULL;
        }
        if (fUVCountsArrays != NULL)
        {
                delete [] fUVCountsArrays;
                fUVCountsArrays = NULL;
        }
        if (fUVIdsArrays != NULL)
        {
                delete [] fUVIdsArrays;
                fUVIdsArrays = NULL;
        }
}