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/*
math/plane3f.h
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#ifndef __INCLUDED_MATH_PLANE3F_H__
#define __INCLUDED_MATH_PLANE3F_H__
#include "math/vector3f.h"
namespace math
{
/** @brief A class representing a plane in 3d space
* all points p(x, y, z) on the plane satisfy the general equation
* x*a() + y*b() + z*c() + d() = 0
*/
class Plane3f
{
public:
/// a plane defined by 3 points in space
Plane3f(Vector3f const & point0, Vector3f const &point1, Vector3f const &point2);
/// copy constructor
Plane3f(Plane3f const & other);
/// normal of the plane, not normalized to lenght 1
inline Vector3f const & normal() const { return plane_normal; }
/// the points defining the plane.
/// @param i 0 <= i < 3
inline Vector3f const & point(size_t i) const { return plane_point[i]; }
/// plane texture
inline std::string & texture() { return plane_texture; }
/// first parameter of the general equation
inline float a() const { return plane_normal[0]; }
/// second parameter of the general equation
inline float b() const { return plane_normal[1]; }
/// third param of the general equation
inline float c() const { return plane_normal[2]; }
/// fourth parameter of the general equation
inline float d() const { return pd; }
private:
Vector3f plane_point[3];
Vector3f plane_normal;
std::string plane_texture;
float pd;
};
}
#endif // __INCLUDED_MATH_PLANE3F_H__
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