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# apiMeshData.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.
    // ==========================================================================
    //+

    //
    // apiMeshData.cpp
    //

    #include <maya/MIOStream.h>
    #include <apiMeshData.h>
    #include <apiMeshIterator.h>
    #include <api_macros.h>

    #include <maya/MFnSingleIndexedComponent.h>
    #include <maya/MArgList.h>

    // Ascii file IO defines
    //
    #define kDblQteChar             "\""
    #define kSpaceChar              "   "
    #define kWrapString             "\n\t\t"
    #define kVertexKeyword          "v"
    #define kNormalKeyword          "vn"
    #define kTextureKeyword         "vt"
    #define kFaceKeyword            "face"
    #define kUVKeyword              "uv"

    const MTypeId apiMeshData::id( 0x80777 );
    const MString apiMeshData::typeName( "apiMeshData" );

    apiMeshData::apiMeshData() : fGeometry( NULL )
    {
        fGeometry = new apiMeshGeom;
    }

    apiMeshData::~apiMeshData()
    {
        if ( NULL != fGeometry ) {
            delete fGeometry;
            fGeometry = NULL;
        }
    }

    /* override */
    MStatus apiMeshData::readASCII( const MArgList& argList, unsigned& index )
    //
    // Description
    //    ASCII file input method.
    //
    {
        if ( ! readVerticesASCII(argList,index) ) {
            return MS::kFailure;
        }
        else if ( ! readNormalsASCII(argList,++index) ) {
            return MS::kFailure;
        }
        else if ( ! readFacesASCII(argList,++index) ) {
            return MS::kFailure;
        }
        else if ( ! readUVASCII(argList,index) ) {
            return MS::kFailure;
        }

        return MS::kSuccess;
    }

    /* override */
    MStatus apiMeshData::readBinary( istream& /*in*/, unsigned /*length*/ )
    //
    // Description
    //     NOT IMPLEMENTED
    //
    {
        return MS::kSuccess;
    }

    /* override */
    MStatus apiMeshData::writeASCII( ostream& out )
    //
    // Description
    //    ASCII file output method.
    //
    {
        if ( ! writeVerticesASCII(out) ) {
            return MS::kFailure;
        }
        else if ( ! writeNormalsASCII(out) ) {
            return MS::kFailure;
        }
        else if ( ! writeFacesASCII(out) ) {
            return MS::kFailure;
        }

        writeUVASCII(out);
        return MS::kSuccess;
    }

    /* override */
    MStatus apiMeshData::writeBinary( ostream& /*out*/ )
    //
    // Description
    //    NOT IMPLEMENTED
    //
    {
        return MS::kSuccess;
    }

    /* override */
    void apiMeshData::copy ( const MPxData& other )
    {
        *fGeometry = *(((const apiMeshData &)other).fGeometry);
    }

    /* override */
    MTypeId apiMeshData::typeId() const
    //
    // Description
    //    Binary tag used to identify this kind of data
    //
    {
        return apiMeshData::id;
    }

    /* override */
    MString apiMeshData::name() const
    //
    // Description
    //    String name used to identify this kind of data
    //
    {
        return apiMeshData::typeName;
    }

    void * apiMeshData::creator()
    {
        return new apiMeshData;
    }

    /* override */
    MPxGeometryIterator* apiMeshData::iterator( MObjectArray & componentList,
                                                MObject & component,
                                                bool useComponents)
    //
    // Description
    //
    {
        apiMeshGeomIterator * result = NULL;
        if ( useComponents ) {
            result = new apiMeshGeomIterator( fGeometry, componentList );
        }
        else {
            result = new apiMeshGeomIterator( fGeometry, component );
        }
        return result;
    }

    /* override */
    MPxGeometryIterator* apiMeshData::iterator( MObjectArray & componentList,
                                                MObject & component,
                                                bool useComponents,
                                                bool /*world*/) const
    //
    // Description
    //
    {
        apiMeshGeomIterator * result = NULL;
        if ( useComponents ) {
            result = new apiMeshGeomIterator( fGeometry, componentList );
        }
        else {
            result = new apiMeshGeomIterator( fGeometry, component );
        }
        return result;
    }

    /* override */
    bool apiMeshData::updateCompleteVertexGroup( MObject & component ) const
    //
    // Description
    //     Make sure complete vertex group data is up-to-date.
    //     Returns true if the component was updated, false if it was already ok.
    //
    //     This is used by deformers when deforming the "whole" object and
    //     not just selected components.
    //
    {
        MStatus stat;
        MFnSingleIndexedComponent fnComponent( component, &stat );

        // Make sure there is non-null geometry and that the component
        // is "complete". A "complete" component represents every
        // vertex in the shape.
        //
        if ( stat && (NULL != fGeometry) && (fnComponent.isComplete()) ) {

            int maxVerts ;
            fnComponent.getCompleteData( maxVerts );
            int numVertices = fGeometry->vertices.length();

            if ( (numVertices > 0) && (maxVerts != numVertices) ) {
                // Set the component to be complete, i.e. the elements in
                // the component will be [0:numVertices-1]
                //
                fnComponent.setCompleteData( numVertices );
                return true;
            }
        }

        return false;
    }

    MStatus apiMeshData::writeUVASCII( ostream &out )
    {
        int uvCount = fGeometry->uvcoords.uvcount();
        int faceVertexCount = fGeometry->uvcoords.faceVertexIndex.length();

        if ( uvCount > 0 ) {
            out << "\n";
            out << kWrapString;
            out << kDblQteChar << kUVKeyword << kDblQteChar
                << kSpaceChar << uvCount << kSpaceChar << faceVertexCount;

            int i;
            float u, v;
            for ( i = 0; i < uvCount; i ++ ) {
                fGeometry->uvcoords.getUV( i, u, v );
                out << kWrapString;
                out << u << kSpaceChar;
                out << v << kSpaceChar;
            }

            const MIntArray &fvl = fGeometry->uvcoords.faceVertexIndex;
            for ( i = 0; i < faceVertexCount; i ++ ) {
                out << kWrapString;
                out << fvl[i] << kSpaceChar;
            }
        }

        return MS::kSuccess;
    }

    MStatus apiMeshData::writeVerticesASCII( ostream& out )
    {
        MPoint vertex;
        int vertexCount = fGeometry->vertices.length();

        out << "\n";
        out << kWrapString;
        out << kDblQteChar << kVertexKeyword << kDblQteChar
            << kSpaceChar << vertexCount;

        for ( int i=0; i<vertexCount; i++ ) {
            vertex = fGeometry->vertices[i];
            out << kWrapString;
            out << vertex[0] << kSpaceChar;
            out << vertex[1] << kSpaceChar;
            out << vertex[2];
        }

        return MS::kSuccess;
    }

    MStatus apiMeshData::writeNormalsASCII( ostream& out )
    {
        MVector normal;
        int normalCount = fGeometry->normals.length();

        out << "\n";
        out << kWrapString;
        out << kDblQteChar << kNormalKeyword << kDblQteChar
            << kSpaceChar << normalCount;

        for ( int i=0; i<normalCount; i++ ) {
            normal = fGeometry->normals[i];
            out << kWrapString;
            out << normal[0] << kSpaceChar;
            out << normal[1] << kSpaceChar;
            out << normal[2];
        }

        return MS::kSuccess;
    }

    MStatus apiMeshData::writeFacesASCII( ostream& out )
    {
        int numFaces = fGeometry->face_counts.length();
        int vid = 0;

        for ( int f=0; f<numFaces; f++ )
        {
            int faceVertexCount = fGeometry->face_counts[f];
            out << "\n";
            out << kWrapString;
            out << kDblQteChar << kFaceKeyword << kDblQteChar
                << kSpaceChar << faceVertexCount;

            out << kWrapString;
            for ( int v=0; v<faceVertexCount; v++ )
            {
                out << fGeometry->face_connects[vid] << kSpaceChar;
                vid++;
            }
        }

        return MS::kSuccess;
    }

    MStatus apiMeshData::readVerticesASCII( const MArgList& argList,
                                            unsigned& index )
    {
        MStatus result;
        MString geomStr;
        MPoint vertex;
        int vertexCount = 0;

        result = argList.get( index, geomStr );

        if ( result && (geomStr == kVertexKeyword) ) {
            result = argList.get( ++index, vertexCount );

            for ( int i=0; i<vertexCount; i++ )
            {
                if ( argList.get( ++index, vertex ) ) {
                    fGeometry->vertices.append( vertex );
                }
                else {
                    result = MS::kFailure;
                }
            }
        }

        return result;
    }

    MStatus apiMeshData::readNormalsASCII( const MArgList& argList,
                                           unsigned& index )
    {
        MStatus result;
        MString geomStr;
        MPoint normal;
        int normalCount = 0;

        result = argList.get( index, geomStr );

        if ( result && (geomStr == kNormalKeyword) ) {
            result = argList.get( ++index, normalCount );
            for ( int i=0; i<normalCount; i++ )
            {
                if ( argList.get( ++index, normal ) ) {
                    fGeometry->normals.append( normal );
                }
                else {
                    result = MS::kFailure;
                }
            }
        }

        return result;
    }

    MStatus apiMeshData::readUVASCII( const MArgList &argList,
                                      unsigned &index )
    {
        MStatus result = MS::kSuccess;
        MString uvStr;
        double u, v;
        int fvi;
        int faceVertexListCount = 0;
        int uvCount;

        fGeometry->uvcoords.reset();
        if ( argList.get(index,uvStr) && (uvStr == kUVKeyword) ) {
            result = argList.get( ++index, uvCount );
            if ( result ) {
                result = argList.get( ++index, faceVertexListCount );
            }
            int i;
            for ( i = 0; i < uvCount && result; i ++ ) {
                if ( argList.get( ++index, u ) && argList.get( ++index, v ) ) {
                    fGeometry->uvcoords.append_uv( (float)u, (float)v );
                } else {
                    result = MS::kFailure;
                }
            }

            for ( i = 0; i < faceVertexListCount && result; i++ ) {
                if ( argList.get( ++index, fvi ) ) {
                    fGeometry->uvcoords.faceVertexIndex.append( fvi );
                } else {
                    result = MS::kFailure;
                }
            }
        }

        return result;
    }

    MStatus apiMeshData::readFacesASCII( const MArgList& argList,
                                         unsigned& index )
    {
        MStatus result = MS::kSuccess;
        MString geomStr;
        int faceCount = 0;
        int vid;

        while( argList.get(index,geomStr) && (geomStr == kFaceKeyword) )
        {
            result = argList.get( ++index, faceCount );
            fGeometry->face_counts.append( faceCount );

            for ( int i=0; i<faceCount; i++ )
            {
                if ( argList.get( ++index, vid ) ) {
                    fGeometry->face_connects.append( vid );
                }
                else {
                    result = MS::kFailure;
                }
            }
            index++;
        }

        fGeometry->faceCount = fGeometry->face_counts.length();
        return result;
    }