/* 
 * File:   Geometry.h
 * Author: daniel
 *
 * Created on August 13, 2010, 5:36 PM
 */

#ifndef _GEOMETRY_H
#define	_GEOMETRY_H

#include "Ray.h"
#include "Common.h"
//---------------------------Geometry----------------------
//This is the interface for the geometric part of the bodies
//in the scene.  It's main job is to determine if it intersects
//a given ray and to return the normal of the intersection point.
//---------------------------------------------------------
class Geometry{
public:
    Geometry() : position(Vector3d::Zero()) {};
    Geometry(Vector3d _position) : position(_position) {};
    ~Geometry(){};
    void setPosition(Vector3d position){this->position = position;}
    Vector3d getPosition() const {return position;}

    //this checks if the ray intersects the geometry and sets the intersection
    //point and the normal at that point.  It returns 0 if there was no intersection,
    //1 if the ray intersects from outside and -1 if it intersects from inside
    virtual int intersectRay(Ray& ray, Vector3d& interPoint, Vector3d& interNormal) = 0;

protected:
    Vector3d position;
};

#endif	/* _GEOMETRY_H */