DCELVertex.h

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using namespace std;
class DCELVertex  
{
public:
    DCELVertex();
    ~DCELVertex();

    double x;
    double y;
    DCELHalfEdge* edge;
    DCELHalfEdge* getEdgeTo(DCELVertex* v);
    DCELHalfEdge* getEdgeOnFace(DCELFace* face);
    void setCoords(double a, double b);
    void print();
    int type;
    int index;
    
    DCELVertex* next;
    DCELVertex* prev;
};

DCELVertex::DCELVertex(): x(0.0), y(0.0), edge(NULL), prev(NULL), next(NULL), type(0), index(0)
{
}
DCELVertex::~DCELVertex()
{

}

void DCELVertex::setCoords(double a, double b) {
    x = a;
    y = b;
}

void DCELVertex::print() {
    cout<<x<<" "<<y<<endl;
}

DCELHalfEdge* DCELVertex::getEdgeTo(DCELVertex* v)
{
    DCELHalfEdge* rval = NULL;

    if (edge) {
        if (edge->twin->origin == v) {
            rval = edge;
        } else {
            DCELHalfEdge* test = edge->twin->next;
            while (rval == NULL && test != edge) {
                if (test->twin->origin == v) {
                    rval = test;
                } else {
                    test = test->twin->next;
                }
            }
        }
    }
    return rval;
}

DCELHalfEdge* DCELVertex::getEdgeOnFace(DCELFace *face)
{
    DCELHalfEdge *edgeWalker = edge;
    while (edgeWalker->face != face) edgeWalker = edgeWalker->twin->next;
    return edgeWalker;
}