splitUVFty.h

//-
// ==========================================================================
// 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.
// ==========================================================================
//+

#ifndef _splitUVFty
#define _splitUVFty
// 
// File: splitUVFty.h
//
// Node Factory: splitUVFty
//
// Author: Lonnie Li
//
// Overview:
//
//              The splitUV factory implements the actual splitUV operation. It takes in
//              only two parameters:
//
//                      1) A polygonal mesh
//                      2) An array of selected UV Ids
//
//              The algorithm works as follows:
//
//                      1) Parse the mesh for the selected UVs and collect:
//
//                              (a) Number of faces sharing each UV
//                                      (stored as two arrays: face array, indexing/offset array)
//                              (b) Associated vertex Id
//
//                      2) Create (N-1) new UVIds for each selected UV, where N represents the number of faces
//                         sharing the UV.
//
//                      3) Set each of the new UVs to the same 2D location on the UVmap.
//
//                      3) Arbitrarily let the last face in the list of faces sharing this UV to keep the original
//                         UV.
//
//                      4) Assign each other face one of the new UVIds.
//
//

#include "polyModifierFty.h"

// General Includes
//
#include <maya/MObject.h>
#include <maya/MIntArray.h>
#include <maya/MString.h>

class splitUVFty : public polyModifierFty
{

public:
                                splitUVFty();
        virtual         ~splitUVFty();

        void            setMesh( MObject mesh );
        void            setUVIds( MIntArray uvIds );

        // polyModifierFty inherited methods
        //
        MStatus         doIt();

private:
        // Mesh Node - Note: We only make use of this MObject during a single call of
        //                                       the splitUV plugin. It is never maintained and used between
        //                                       calls to the plugin as the MObject handle could be invalidated
        //                                       between calls to the plugin.
        //
        MObject         fMesh;

        // Selected UVs
        //
        MIntArray       fSelUVs;
};

#endif