Polygon.h

#ifndef POLYGON_H
#define POLYGON_H


/*
** ---------------------------------------------------------------
** Includes:
*/
#include <map>
#include "geom.h"
#include "ray.h"
#include "lang.h"


/*
** ---------------------------------------------------------------
** Definitions:
*/

typedef Vector3Array Vertices;

class Polygon;

typedef std::vector<Polygon *> PolygonArray;



class Polygon {

public:
        Polygon (int n);

        Polygon(const Polygon &p);

        int n_vertices() const;

        Vector3 &vertex(int index) const; 

        void dispose(int index);

        virtual void transform(const AffineTransform &t);
        virtual void homoxform(const PerspectiveTransform &t);

        virtual Vector3 normal() const;
        virtual Vector3 centroid();

private :

        Vertices *vertices;

        void init(int n);

};

inline void
Polygon::init(int n) 
{
        vertices = new Vertices(n); 
}

inline 
Polygon::Polygon(int n)
{
        init(n);
}

inline 
Polygon::Polygon(const Polygon &p)
{
        init(n);
        int i;
        for (i = 0; i < vertices.size(); i++)
                vertices(i) = p.vertex(i);
}

inline int
Polygon::n_vertices() const
{
        return vertices.size();
}

inline Vector &
Polygon::vertex(int index) const
{
        return vertices.at(index);
}

inline void
Polygon::dispose(int index)
{
        //TODO should traverse the list of vertices and remove it. May be using STL would help !
}

#endif //POLYGON_H

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