Explorer.cc

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#include <esg/explorer/Explorer.h>
#include <esg/iterator/IteratorSDS.h>

using namespace esg;

bool Explorer::_explore(SceneGraphObject& obj)
{
    const Transform* pTr = obj.transformation();

    if (pTr) { // new transformation => update stack
        Matrix4* auxMat = new Matrix4(pTr->get());
        if (!_trStack.empty()) auxMat->mul(*_trStack.top(), *auxMat);
        _trStack.push(auxMat);
        _accept_new_transformation(*auxMat);
    }

    /*
     * Inspect subnodes and/or attributes
     */
    bool ret = (obj.hasSubnodes()) ?  _iterate(obj) : _process_leaf(obj);

    /*
     * Erase my transform. matrix after backtracking children
     */
    if (pTr && !_trStack.empty()) {
        delete _trStack.top();
        _trStack.pop();
    }

    return ret;
}

bool Explorer::_iterate(SceneGraphObject& obj)
{
    SceneGraphObject* pCandidate;
    IteratorSDS*      pIter = obj.traverseSubnodes();

    if (!pIter) return false;
    
    pIter->initChildrenSearch();

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

// ----- public -----

void Explorer::explore(SceneGraphObject& obj)
{
    while (!_trStack.empty()) { delete _trStack.top(); _trStack.pop(); }
    (void) _explore(obj);
}

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