/************************************************
*
* Project Information: Classe Vecteur 3D
*
* Filename: CVector3.h
* Version : 0.0.1-dev
* Last Update: 23-01-2004
*
* Author:  Romain Gaucher -- nEUrOO
* E-mail:  neuroo@kouette.com
* Date  :  23-01-2004
*
* Comment: Opération sur les vecteurs
*
***********************************************/


#ifndef __M_CVECTOR3_H
#define __M_CVECTOR3_H

#include <cmath>

#define SQR(x)        (x*x)
#define NULL_VECTOR   MakeVect3(0.0f,0.0f,0.0f)

class CVector3
{
 public:

      float x,y,z;

      CVector3(): x(0.0f),y(0.0f),z(0.0f) {}
      CVector3(float u, float v, float w)
      {
        x = u, y = v, w = z;
      }
      ~CVector3() {}

      CVector3 operator+ (const CVector3& u)
      {
      	CVector3 res;
      	res.x = x+u.x;
      	res.y = y+u.y;
      	res.z = z+u.z;
      	return res;
      }

      CVector3 operator- (const CVector3& u)
      {
      	CVector3 res;
      	res.x = x-u.x;
      	res.y = y-u.y;
      	res.z = z-u.z;
      	return res;
      }
      
      CVector3 operator* (float r)
      {
      	CVector3 res;
      	res.x = x*r;
      	res.y = y*r;
      	res.z = z*r;
      	return res;
      }


      float operator* (CVector3 u)	//dot_prod
      {
      	return x*u.x+y*u.y+z*u.z;
      }



      void GetValues(float &u, float &v, float &w)
      {
        u = x;
        v = y;
        w = z;
      }
      
};


float GetNorm(CVector3 * v);

CVector3 MakeVect3(float u, float v, float w);

CVector3 Normalize(CVector3 v);

CVector3 CrossProduct (CVector3 * u, CVector3 * v);


#endif
/************************************************
*
* 23-01-2004: Creation du source (Romain)
*             Classe finie !
*
***********************************************/