convertfromperformer.cpp

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    if (name) osgTransform->setName(name);

    pfMatrix matrix;
    scs->getMat(matrix);
    osg::Matrix osgMatrix(matrix[0][0],matrix[0][1],matrix[0][2],matrix[0][3],
        matrix[1][0],matrix[1][1],matrix[1][2],matrix[1][3],
        matrix[2][0],matrix[2][1],matrix[2][2],matrix[2][3],
        matrix[3][0],matrix[3][1],matrix[3][2],matrix[3][3]);

    osgTransform->setMatrix(osgMatrix);

    for(int i=0;i<scs->getNumChildren();++i)
    {
        visitNode(osgTransform,scs->getChild(i));
    }
    return (osg::Node*)osgTransform;
}


osg::Node* ConvertFromPerformer::visitGeode(osg::Group* osgParent,pfGeode* geode)
{
    osg::Geode* osgGeode = dynamic_cast<osg::Geode*>(getOsgObject(geode));
    if (osgGeode)
    {
        if (osgParent) osgParent->addChild(osgGeode);
        return osgGeode;
    }

    osgGeode = new osg::Geode;
    if (osgParent) osgParent->addChild(osgGeode);

    registerPfObjectForOsgObject(geode,osgGeode);

    const char* name = geode->getName();
    if (name) osgGeode->setName(name);

    for(int i=0;i<geode->getNumGSets();++i)
    {
        visitGeoSet(osgGeode,geode->getGSet(i));
    }

    return (osg::Node*)osgGeode;
}


osg::Node* ConvertFromPerformer::visitBillboard(osg::Group* osgParent,pfBillboard* billboard)
{
    //    return NULL;

    osg::Billboard* osgBillboard = dynamic_cast<osg::Billboard*>(getOsgObject(billboard));
    if (osgBillboard)
    {
        if (osgParent) osgParent->addChild(osgBillboard);
        return osgBillboard;
    }

    osgBillboard = new osg::Billboard;
    if (osgParent) osgParent->addChild(osgBillboard);

    registerPfObjectForOsgObject(billboard,osgBillboard);

    const char* name = billboard->getName();
    if (name) osgBillboard->setName(name);

    pfVec3 axis;
    billboard->getAxis(axis);
    osgBillboard->setAxis(osg::Vec3(axis[0],axis[1],axis[2]));

    switch( billboard->getMode( PFBB_ROT ) )
    {
    case PFBB_AXIAL_ROT:
       osgBillboard->setMode( osg::Billboard::AXIAL_ROT );
       break;
    case PFBB_POINT_ROT_EYE:
       osgBillboard->setMode( osg::Billboard::POINT_ROT_EYE );
       break;
    case PFBB_POINT_ROT_WORLD:
       osgBillboard->setMode( osg::Billboard::POINT_ROT_WORLD );
       break;
    }

    for(int i=0;i<billboard->getNumGSets();++i)
    {
                                 /* osg::GeoSet* osggset = */
        visitGeoSet(osgBillboard,billboard->getGSet(i));
        pfVec3 pos;
        billboard->getPos(i,pos);
        osgBillboard->setPosition(i,osg::Vec3(pos[0],pos[1],pos[2]));
    }

    return (osg::Node*)osgBillboard;
}


int ConvertFromPerformer::getNumVerts(pfGeoSet *gset)
{
    int nv;
    int np;
    int *lens;
    int i;

    np = gset->getNumPrims();
    nv = 0;

    switch( gset->getPrimType() )
    {
        case PFGS_POINTS :
            nv = np;
            break;

        case PFGS_LINES :
            nv = 2 * np;
            break;

        case PFGS_TRIS :
            nv = 3 * np;
            break;

        case PFGS_QUADS :
            nv = 4 * np;
            break;

        case PFGS_TRISTRIPS :
        case PFGS_TRIFANS :
        case PFGS_FLAT_TRISTRIPS :
        case PFGS_POLYS :
        case PFGS_LINESTRIPS :
        case PFGS_FLAT_LINESTRIPS :

            lens = gset->getPrimLengths();
            for( i = 0; i < np; i++ )
                nv += lens[i];
            break;

    }

    return nv;
}


osg::Drawable* ConvertFromPerformer::visitGeoSet(osg::Geode* osgGeode,pfGeoSet* geoset)
{
    if (geoset==NULL) return NULL;

    osg::Drawable* osgDrawable = dynamic_cast<osg::Drawable*>(getOsgObject(geoset));
    if (osgDrawable)
    {
        if (osgGeode) osgGeode->addDrawable(osgDrawable);
        return osgDrawable;
    }

    // we'll make it easy to convert by using the Performer style osg::GeoSet,
    // and then convert back to a osg::Geometry afterwards.
    //osg::ref_ptr<osg::GeoSet> geom = new osg::GeoSet;
    osg::Geometry* geom = new osg::Geometry;

    int i;

    // number of prims
    int np = geoset->getNumPrims();
    int *plen = geoset->getPrimLengths();

    // Number of verticies (may be different than number of coords)
    int nv = getNumVerts( geoset );

    int prim = geoset->getPrimType();
    int flat_shaded_skip_per_primitive=0;
    if (prim == PFGS_FLAT_LINESTRIPS)       flat_shaded_skip_per_primitive=1;
    else if (prim == PFGS_FLAT_TRISTRIPS)   flat_shaded_skip_per_primitive=2;
    else if (prim == PFGS_FLAT_TRIFANS)     flat_shaded_skip_per_primitive=2;

    int flat_shaded_skip_all_primitives=flat_shaded_skip_per_primitive*np;

    // create the primitive sets.
    switch( geoset->getPrimType() )
    {
        case PFGS_POINTS :
            geom->addPrimitiveSet(new osg::DrawArrays(GL_POINTS,0,np));
            break;

        case PFGS_LINES :
            geom->addPrimitiveSet(new osg::DrawArrays(GL_LINES,0,2*np));
            break;

        case PFGS_TRIS :
            geom->addPrimitiveSet(new osg::DrawArrays(GL_TRIANGLES,0,3*np));
            break;

        case PFGS_QUADS :
            geom->addPrimitiveSet(new osg::DrawArrays(GL_QUADS,0,4*np));
            break;

        case PFGS_TRISTRIPS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_TRIANGLE_STRIP,0,np,plen));
            break;
            
        case PFGS_TRIFANS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_TRIANGLE_FAN,0,np,plen));
            break;

        case PFGS_FLAT_TRISTRIPS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_TRIANGLE_STRIP,0,np,plen));
            break;
            
        case PFGS_POLYS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_POLYGON,0,np,plen));
            break;
            
        case PFGS_LINESTRIPS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_LINE_STRIP,0,np,plen));
            break;

        case PFGS_FLAT_LINESTRIPS :
            geom->addPrimitiveSet(new osg::DrawArrayLengths(GL_LINE_STRIP,0,np,plen));
            break;

        default:
           osg::notify(osg::INFO) << "ConvertFromPerformer::visitGeoSet: Osg can't convert primitive "
                     << geoset->getPrimType()
                     << std::endl;
            break;

    }


    pfVec3 *coords;
    ushort *ilist;
    geoset->getAttrLists( PFGS_COORD3,  (void **)&coords, &ilist );

    // copy the vertex coordinates across.
    if( coords )
    {
        // calc the maximum num of vertex from the index list.
        int cc;
        if (ilist)
        {
            cc = 0;
            for( i = 0; i < nv; i++ )
                if( ilist[i] > cc ) cc = ilist[i];
            cc++;
        }
        else
            cc = nv;

        osg::Vec3Array* osg_coords = new osg::Vec3Array(cc);
        for( i = 0; i < cc; i++ )
        {
            (*osg_coords)[i][0] = coords[i][0];
            (*osg_coords)[i][1] = coords[i][1];
            (*osg_coords)[i][2] = coords[i][2];
        }
        
        geom->setVertexArray(osg_coords);

        if(ilist)
        {
            geom->setVertexIndices(new osg::UShortArray(nv,ilist));
        }

    }


    pfVec2 *tcoords;
    geoset->getAttrLists( PFGS_TEXCOORD2,  (void **)&tcoords, &ilist );

    // copy texture coords
    if(tcoords)
    {
        int bind = geoset->getAttrBind( PFGS_TEXCOORD2 );
        
        
        if (bind==PFGS_PER_VERTEX && bind != PFGS_OFF)
        {
            int nn = bind == PFGS_OFF ? 0 :
                     bind == PFGS_OVERALL ? 1 :
                     bind == PFGS_PER_PRIM ? geoset->getNumPrims() :
                     bind == PFGS_PER_VERTEX ? nv : 0;

            // set the normal binding type.
            //geom->setTextureBinding(_gsetBindMap[bind]);

            // calc the maximum num of vertex from the index list.
            int cc;
            if (ilist)
            {
                cc = 0;
                for( i = 0; i < nv; i++ )
                    if( ilist[i] > cc ) cc = ilist[i];
                cc++;
            }
            else
                cc = nn;

            osg::Vec2Array* osg_tcoords = new osg::Vec2Array(cc);
            for( i = 0; i < cc; i++ )
            {
                (*osg_tcoords)[i][0] = tcoords[i][0];
                (*osg_tcoords)[i][1] = tcoords[i][1];
            }

            geom->setTexCoordArray(0,osg_tcoords);

            if(ilist)
            {
                geom->setTexCoordIndices(0,new osg::UShortArray(nn,ilist));
            }
        }
        else
        {
            osg::notify(osg::INFO)<<"OSG can't handle non PER_VERTEX tex coord binding at present"<<std::endl;
        }

    }

    pfVec3 *norms;
    geoset->getAttrLists( PFGS_NORMAL3,  (void **)&norms, &ilist );

    // copy normals
    if(norms)
    {
        int bind = geoset->getAttrBind( PFGS_NORMAL3 );
        if (bind==PFGS_PER_VERTEX && flat_shaded_skip_all_primitives!=0)
        {
            // handle flat shaded skip of normals.
            int nn = nv-flat_shaded_skip_all_primitives;

            // set the normal binding type.
            geom->setNormalBinding(_gsetBindMap[bind]);

            if (ilist)
            {
                // calc the maximum num of vertex from the index list.
                int cc = 0;
                for( i = 0; i < nn; i++ )
                    if( ilist[i] > cc ) cc = ilist[i];
                cc++;

                // straight forward mapping of normals across.                
                osg::Vec3Array* osg_norms = new osg::Vec3Array(cc);
                for( i = 0; i < cc; i++ )
                {
                    (*osg_norms)[i][0] = norms[i][0];
                    (*osg_norms)[i][1] = norms[i][1];
                    (*osg_norms)[i][2] = norms[i][2];
                }
                geom->setNormalArray(osg_norms);            

                osg::UShortArray* osg_indices = new osg::UShortArray;
                osg_indices->reserve(nv);
                
                int ni=0;
                for( i = 0; i < np; ++i)
                {
                    for(int si=0;si<flat_shaded_skip_per_primitive;++si)
                    {
                        osg_indices->push_back(ilist[ni]);
                    }
                    for( int pi=0; pi < plen[i]-flat_shaded_skip_per_primitive; ++pi)
                    {
                        osg_indices->push_back(ilist[ni++]);
                    }
                }
                
                if (ni!=nn) 
                {
                    osg::notify(osg::INFO) << "1 ni!=nn"<<std::endl;
                }
                
                geom->setNormalIndices(osg_indices);
                
                
            }
            else
            {
                osg::Vec3Array* osg_norms = new osg::Vec3Array;
                osg_norms->reserve(nv);
                
                int ni=0;
                for( i = 0; i < np; ++i)
                {
                    for(int si=0;si<flat_shaded_skip_per_primitive;++si)
                    {
                        osg_norms->push_back(osg::Vec3(norms[ni][0],norms[ni][1],norms[ni][2]));
                    }
                    for( int pi=0; pi < plen[i]-flat_shaded_skip_per_primitive; ++pi)
                    {
                        osg_norms->push_back(osg::Vec3(norms[ni][0],norms[ni][1],norms[ni][2]));
                        ni++;
                    }
                }