Tetra2TriangleTopologicalMapping.cpp

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/******************************************************************************
*       SOFA, Simulation Open-Framework Architecture, version 1.0 beta 3      *
*                (c) 2006-2008 MGH, INRIA, USTL, UJF, CNRS                    *
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* This library is free software; you can redistribute it and/or modify it     *
* under the terms of the GNU Lesser General Public License as published by    *
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*******************************************************************************
*                               SOFA :: Modules                               *
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* Authors: The SOFA Team and external contributors (see Authors.txt)          *
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#include <sofa/component/topology/Tetra2TriangleTopologicalMapping.h>

#include <sofa/core/ObjectFactory.h>

#include <sofa/component/topology/TriangleSetTopologyContainer.h>
#include <sofa/component/topology/TriangleSetTopologyModifier.h>
#include <sofa/component/topology/TriangleSetTopologyChange.h>

#include <sofa/component/topology/TetrahedronSetTopologyContainer.h>
#include <sofa/component/topology/TetrahedronSetTopologyModifier.h>
#include <sofa/component/topology/TetrahedronSetTopologyChange.h>

#include <sofa/component/topology/PointSetTopologyChange.h> 

#include <sofa/defaulttype/Vec.h>
#include <map>
#include <sofa/defaulttype/VecTypes.h>

namespace sofa
{

namespace component
{

namespace topology
{

using namespace sofa::defaulttype;

using namespace sofa::component::topology;
using namespace sofa::core::componentmodel::topology;

SOFA_DECL_CLASS(Tetra2TriangleTopologicalMapping)

// Register in the Factory
int Tetra2TriangleTopologicalMappingClass = core::RegisterObject("Special case of mapping where TetrahedronSetTopology is converted to TriangleSetTopology")
.add< Tetra2TriangleTopologicalMapping >()

;

// Implementation

Tetra2TriangleTopologicalMapping::Tetra2TriangleTopologicalMapping(In* from, Out* to)
: TopologicalMapping(from, to),
object1(initData(&object1, std::string("../.."), "object1", "First object to map")),
object2(initData(&object2, std::string(".."), "object2", "Second object to map"))
{
}

Tetra2TriangleTopologicalMapping::~Tetra2TriangleTopologicalMapping()
{
}

void Tetra2TriangleTopologicalMapping::init()
{
    //std::cout << "INFO_print : init Tetra2TriangleTopologicalMapping" << std::endl;

    // INITIALISATION of TRIANGULAR mesh from TETRAHEDRAL mesh :

    
    if (fromModel) {
        
        std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - from = tetra" << std::endl;
        
        if (toModel) {

            std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - to = triangle" << std::endl;

            TriangleSetTopologyContainer *to_tstc;
            toModel->getContext()->get(to_tstc);    
            to_tstc->clear();

            toModel->setNbPoints(fromModel->getNbPoints());

            TriangleSetTopologyModifier *to_tstm;
            toModel->getContext()->get(to_tstm);    

            const sofa::helper::vector<Triangle> &triangleArray=fromModel->getTriangles();          


            unsigned int nb_visible_triangles = 0;

            Loc2GlobVec.clear();
            Glob2LocMap.clear();            

            for (unsigned int i=0; i<triangleArray.size(); ++i) {               

                    if (fromModel->getTetraTriangleShell(i).size()==1) {                                    

                            to_tstm->addTriangleProcess(triangleArray[i]);

                            Loc2GlobVec.push_back(i);
                            Glob2LocMap[i]=Loc2GlobVec.size()-1;

                            nb_visible_triangles+=1;                        
                    }
            }           
            
            to_tstm->notifyEndingEvent();
            
        }
        
    }
}

unsigned int Tetra2TriangleTopologicalMapping::getFromIndex(unsigned int ind){
    
    if(fromModel->getTetraTriangleShell(ind).size()==1){
        return fromModel->getTetraTriangleShell(ind)[0];
    }else{
        return 0;
    }   
}

void Tetra2TriangleTopologicalMapping::updateTopologicalMapping(){

    // INITIALISATION of TRIANGULAR mesh from TETRAHEDRAL mesh :
    
    if (fromModel) {

        TriangleSetTopologyModifier *to_tstm;
        toModel->getContext()->get(to_tstm);            

        if (toModel) {
            
            std::list<const TopologyChange *>::const_iterator itBegin=fromModel->firstChange();
            std::list<const TopologyChange *>::const_iterator itEnd=fromModel->lastChange();

            while( itBegin != itEnd )
            {
                TopologyChangeType changeType = (*itBegin)->getChangeType();                                

                switch( changeType ) {

                case core::componentmodel::topology::ENDING_EVENT:
                    {
                        //std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - ENDING_EVENT" << std::endl;
                        to_tstm->notifyEndingEvent();
                        break;
                    }

                case core::componentmodel::topology::TRIANGLESREMOVED:
                    {
                        //std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - TRIANGLESREMOVED" << std::endl;

                        int last;
                        int ind_last;
                            
                        last= fromModel->getNbTriangles() - 1;

                        const sofa::helper::vector<unsigned int> &tab = ( static_cast< const TrianglesRemoved *>( *itBegin ) )->getArray();
                        
                        unsigned int ind_tmp;

                        unsigned int ind_real_last;
                        ind_last=toModel->getNbTriangles();
                        
                        for (unsigned int i = 0; i <tab.size(); ++i)
                        {
                            unsigned int k = tab[i];
                            unsigned int ind_k;     
                            
                            std::map<unsigned int, unsigned int>::iterator iter_1 = Glob2LocMap.find(k);
                            if(iter_1 != Glob2LocMap.end()) {

                                ind_last = ind_last - 1;

                                ind_k = Glob2LocMap[k];
                                ind_real_last = ind_k;
                                
                                std::map<unsigned int, unsigned int>::iterator iter_2 = Glob2LocMap.find(last);
                                if(iter_2 != Glob2LocMap.end()) {                               

                                    ind_real_last = Glob2LocMap[last];                                                                                                      

                                    if((int) k != last){

                                        Glob2LocMap.erase(Glob2LocMap.find(k));
                                        Glob2LocMap[k] = ind_real_last;

                                        Glob2LocMap.erase(Glob2LocMap.find(last));
                                        Glob2LocMap[last] = ind_k;

                                        ind_tmp = Loc2GlobVec[ind_real_last];
                                        Loc2GlobVec[ind_real_last] = Loc2GlobVec[ind_k];  
                                        Loc2GlobVec[ind_k] = ind_tmp;
                                    }                                   
                                }

                                if((int) ind_k != ind_last){ 

                                    Glob2LocMap.erase(Glob2LocMap.find(Loc2GlobVec[ind_last]));
                                    Glob2LocMap[Loc2GlobVec[ind_last]] = ind_k;
                                
                                    Glob2LocMap.erase(Glob2LocMap.find(Loc2GlobVec[ind_k]));
                                    Glob2LocMap[Loc2GlobVec[ind_k]] = ind_last;

                                    ind_tmp = Loc2GlobVec[ind_k];
                                    Loc2GlobVec[ind_k] = Loc2GlobVec[ind_last];
                                    Loc2GlobVec[ind_last] = ind_tmp;

                                }

                                Glob2LocMap.erase(Glob2LocMap.find(Loc2GlobVec[Loc2GlobVec.size() - 1])); 
                                Loc2GlobVec.resize( Loc2GlobVec.size() - 1 );
                                
                                sofa::helper::vector< unsigned int > triangles_to_remove;
                                triangles_to_remove.push_back(ind_k);

                                TriangleSetTopologyModifier *triangleMod;
                                toModel->getContext()->get(triangleMod);
                                triangleMod->removeTriangles(triangles_to_remove, true, false);                             

                            }else{

                                std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - Glob2LocMap should have the visible triangle " << tab[i] << std::endl;
                                std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - nb triangles = " << ind_last << std::endl;
                            }

                            --last;
                        }

                        break;
                    }

                case core::componentmodel::topology::TETRAHEDRAREMOVED:
                    {
                        //std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - TETRAHEDRAREMOVED" << std::endl;

                        if (fromModel) {

                            const sofa::helper::vector<Tetrahedron> &tetrahedronArray=fromModel->getTetras();

                            const sofa::helper::vector<unsigned int> &tab = ( static_cast< const TetrahedraRemoved *>( *itBegin ) )->getArray();

                            sofa::helper::vector< Triangle > triangles_to_create;
                            sofa::helper::vector< unsigned int > trianglesIndexList;
                            int nb_elems = toModel->getNbTriangles();

                            for (unsigned int i = 0; i < tab.size(); ++i)
                            {                               

                                for (unsigned int j = 0; j < 4; ++j)
                                {                               
                                    unsigned int k = (fromModel->getTriangleTetraShell(tab[i]))[j];

                                    if (fromModel->getTetraTriangleShell(k).size()==1) { // remove as visible the triangle indexed by k

                                        // do nothing

                                    }else{ // fromModel->getTetraTriangleShell(k).size()==2 // add as visible the triangle indexed by k

                                        unsigned int ind_test;
                                        if(tab[i] == fromModel->getTetraTriangleShell(k)[0]){

                                            ind_test = fromModel->getTetraTriangleShell(k)[1];

                                        }else{ // tab[i] == fromModel->getTetraTriangleShell(k)[1] 

                                            ind_test = fromModel->getTetraTriangleShell(k)[0];
                                        }

                                        bool is_present = false;
                                        unsigned int k0 = 0;
                                        while((!is_present) && k0 < i){
                                            is_present = (ind_test == tab[k0]);
                                            k0+=1;
                                        }
                                        if(!is_present){
                                            
                                            Triangle t;

                                            const Tetrahedron &te=tetrahedronArray[ind_test];
                                            int h = fromModel->getTriangleIndexInTetrahedron(fromModel->getTriangleTetraShell(ind_test),k);
                                            
                                            if (h%2) {
                                                t[0]=(int)(te[(h+1)%4]); t[1]=(int)(te[(h+2)%4]); t[2]=(int)(te[(h+3)%4]);
                                            } else {
                                                t[0]=(int)(te[(h+1)%4]); t[2]=(int)(te[(h+2)%4]); t[1]=(int)(te[(h+3)%4]);
                                            }
                                    
                                            // sort t such that t[0] is the smallest one 
                                            while ((t[0]>t[1]) || (t[0]>t[2])) {
                                                int val=t[0]; t[0]=t[1];t[1]=t[2];t[2]=val;
                                            }                                                                                       
                                                                                        
                                            triangles_to_create.push_back(t);   
                                            trianglesIndexList.push_back(nb_elems);
                                            nb_elems+=1;

                                            Loc2GlobVec.push_back(k);
                                            std::map<unsigned int, unsigned int>::iterator iter_1 = Glob2LocMap.find(k);
                                            if(iter_1 != Glob2LocMap.end() ) {
                                                std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - fail to add triangle " << k << "which already exists" << std::endl;
                                                Glob2LocMap.erase(Glob2LocMap.find(k));
                                            }
                                            Glob2LocMap[k]=Loc2GlobVec.size()-1;                                            
                                        }
                                    }
                                }
                            }

                            to_tstm->addTrianglesProcess(triangles_to_create) ; 
                            to_tstm->addTrianglesWarning(triangles_to_create.size(), triangles_to_create, trianglesIndexList) ;

                        }                       

                        break;
                    }

                    case core::componentmodel::topology::POINTSREMOVED:
                    {
                        //std::cout << "INFO_print : Tetra2TriangleTopologicalMapping - POINTSREMOVED" << std::endl;
                        
                        const sofa::helper::vector<unsigned int> tab = ( static_cast< const sofa::component::topology::PointsRemoved * >( *itBegin ) )->getArray();

                        sofa::helper::vector<unsigned int> indices;

                        for(unsigned int i = 0; i < tab.size(); ++i){                           

                            indices.push_back(tab[i]);
                        }

                        sofa::helper::vector<unsigned int>& tab_indices = indices;

                        to_tstm->removePointsWarning(tab_indices, false);
                        
                        to_tstm->propagateTopologicalChanges();
                        to_tstm->removePointsProcess(tab_indices, false);                       

                        break;
                    }
                
                    case core::componentmodel::topology::POINTSRENUMBERING:
                    {
                        //std::cout << "INFO_print : Hexa2QuadTopologicalMapping - POINTSREMOVED" << std::endl;
                        
                        const sofa::helper::vector<unsigned int> &tab = ( static_cast< const PointsRenumbering * >( *itBegin ) )->getIndexArray();
                        const sofa::helper::vector<unsigned int> &inv_tab = ( static_cast< const PointsRenumbering * >( *itBegin ) )->getinv_IndexArray();

                        sofa::helper::vector<unsigned int> indices;
                        sofa::helper::vector<unsigned int> inv_indices;

                        for(unsigned int i = 0; i < tab.size(); ++i){

                            //std::cout << "INFO_print : Hexa2QuadTopologicalMapping - point = " << tab[i] << std::endl;
                            indices.push_back(tab[i]);
                            inv_indices.push_back(inv_tab[i]);
                        }

                        sofa::helper::vector<unsigned int>& tab_indices = indices;
                        sofa::helper::vector<unsigned int>& inv_tab_indices = inv_indices;

                        to_tstm->renumberPointsWarning(tab_indices, inv_tab_indices, false);
                        to_tstm->propagateTopologicalChanges();
                        to_tstm->renumberPointsProcess(tab_indices, inv_tab_indices, false);                        

                        break;
                    }
                default:
                    // Ignore events that are not Triangle  related.
                    break;
                };              

                ++itBegin;
            }
            to_tstm->propagateTopologicalChanges();
        }
    }

    return;
}


} // namespace topology

} // namespace component

} // namespace sofa