ObjsInAreaExplorer.cc

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#include "esg/explorer/ObjsInAreaExplorer.h"
#include <esg/iterator/IteratorSDS.h>

using namespace esg;

bool ObjsInAreaExplorer::_iterate(SceneGraphObject& obj)
{
    SceneGraphObject* pCandidate;
    IteratorSDS*      pIter = obj.traverseSubnodes();
    
    if (!pIter) return false;
    
    pIter->initAreaSearch(_pTrArea);

    bool ret = false;
    pCandidate = pIter->firstChild();
    while (pCandidate) {
        if (_explore(*pCandidate)) ret = true;
        pCandidate = pIter->nextChild();
    }
    delete pIter;

    return ret;
}

bool ObjsInAreaExplorer::_process_leaf(SceneGraphObject& obj)
{
#ifndef _MSC_VER
#warning "FIXME: distance of primitive"
#endif
    
    TrObj * pO = new TrObj;
    pO->pObject =  &obj;
    if (_trStack.empty()) pO->pTrMat = NULL;
    else pO->pTrMat = new Matrix4(*_trStack.top());
    _foundObjects.append(pO);
    return true;
}

void ObjsInAreaExplorer::_accept_new_transformation(const Matrix4& trMat)
{
    static Matrix3 rMat;
    static Vector3 tVec;
    static Vector3 sVec;
    static Matrix4 sMat;

    if (!_pArea) return;
    
    trMat.get(rMat, tVec, sVec);
    rMat.transpose();
    tVec.negate();
    if (sVec.x && sVec.y && sVec.z) {
        sVec.x = 1.0 / sVec.x;
        sVec.y = 1.0 / sVec.y;
        sVec.z = 1.0 / sVec.z;
        sMat.set(rMat, tVec, sVec);
    } else
        sMat.set(rMat, tVec, 1);

    if (_pTrArea) delete _pTrArea;
    _pTrArea = (Geometry*) _pArea->clone(&sMat);
}



ObjsInAreaExplorer::ObjsInAreaExplorer(const Geometry& area)
{
    _pArea   = (Geometry*) area.clone();
    _pTrArea = (Geometry*) area.clone();
}

ObjsInAreaExplorer::~ObjsInAreaExplorer()
{
    TrObj * pO;
    while ((pO = _foundObjects.firstItem())) {
        if (pO->pTrMat) delete pO->pTrMat;
        delete pO;
    }
    if (_pTrArea) delete _pTrArea;
    if (_pArea)   delete _pArea;
}

SceneGraphObject* ObjsInAreaExplorer::result(Matrix4& trMat, bool& hasMat)
{
    SceneGraphObject * pObject;
    TrObj            * o = _foundObjects.remove(_foundObjects.firstItem());

    if (!o) return NULL;

    pObject = o->pObject;

    if (o->pTrMat) {
        trMat.set(*(o->pTrMat));
        hasMat = true;
        delete o->pTrMat;
    } else
        hasMat = false;
    
    delete o;
    return pObject;
}

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