/*
 This file is part of the VRender library.
 Copyright (C) 2005 Cyril Soler (Cyril.Soler@imag.fr)
 Version 1.0.0, released on June 27, 2005.

 http://artis.imag.fr/Members/Cyril.Soler/VRender

 VRender is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 VRender is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with VRender; if not, write to the Free Software Foundation, Inc.,
 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/****************************************************************************

 Copyright (C) 2002-2013 Gilles Debunne. All rights reserved.

 This file is part of the QGLViewer library version 2.4.0.

 http://www.libqglviewer.com - contact@libqglviewer.com

 This file may be used under the terms of the GNU General Public License 
 versions 2.0 or 3.0 as published by the Free Software Foundation and
 appearing in the LICENSE file included in the packaging of this file.
 In addition, as a special exception, Gilles Debunne gives you certain 
 additional rights, described in the file GPL_EXCEPTION in this package.

 libQGLViewer uses dual licensing. Commercial/proprietary software must
 purchase a libQGLViewer Commercial License.

 This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

*****************************************************************************/

#ifndef _VRENDER_VECTOR3_H
#define _VRENDER_VECTOR3_H

#include <stdexcept>

#ifndef FLT_MAX
# define FLT_MAX 9.99E20f
#endif

namespace vrender
{
  class NVector3;

	class Vector3
	{
		public:
			// ---------------------------------------------------------------------------
			//! @name Constant
			//@{
			static const Vector3 inf;
			//@}

			// ---------------------------------------------------------------------------
			//! @name Constructor(s) and destructor
			//@{
			Vector3 ();
			~Vector3 ();
			Vector3 (const Vector3&);
			Vector3 (const NVector3&);
			Vector3 (double, double, double);

			//@}

			// ---------------------------------------------------------------------------
			//! @name Access methods
			//@{
			inline double  x() const { return _xyz[0]; }
			inline double  y() const { return _xyz[1]; }
			inline double  z() const { return _xyz[2]; }
			inline void  setX(double r) { _xyz[0] = r; }
			inline void  setY(double r) { _xyz[1] = r; }
			inline void  setZ(double r) { _xyz[2] = r; }
			inline void  setXYZ (double x,double y,double z) { _xyz[0] = x; _xyz[1] = y; _xyz[2] = z; }
			//@}

			// ---------------------------------------------------------------------------
			//! @name Assignment
			//@{
			inline Vector3& operator= (const Vector3& u)  { _xyz[0] = u._xyz[0]; _xyz[1] = u._xyz[1]; _xyz[2] = u._xyz[2]; return *this; }
			Vector3& operator= (const NVector3& u);
			//@}

			// ---------------------------------------------------------------------------
			//! @name Comparisons
			//@{
			friend bool operator== (const Vector3&,const Vector3&);
			friend bool operator!= (const Vector3&,const Vector3&);
			//@}

			// ---------------------------------------------------------------------------
			//! @name Algebraic operations
			//@{
			inline Vector3& operator+= (const Vector3& v)
			{
				_xyz[0] += v._xyz[0];
				_xyz[1] += v._xyz[1];
				_xyz[2] += v._xyz[2];
				return *this;
			}

			inline Vector3& operator-= (const Vector3& v)
			{
				_xyz[0] -= v._xyz[0];
				_xyz[1] -= v._xyz[1];
				_xyz[2] -= v._xyz[2];
				return *this;
			}

			inline Vector3& operator*= (double f) { _xyz[0] *= f; _xyz[1] *= f; _xyz[2] *= f; return *this;}
			inline Vector3& operator/= (double f) { _xyz[0] /= f; _xyz[1] /= f; _xyz[2] /= f; return *this;}

			static Vector3 mini(const Vector3&,const Vector3&) ;
			static Vector3 maxi(const Vector3&,const Vector3&) ;

			Vector3& operator-= (const NVector3&);
			Vector3& operator+= (const NVector3&);

			friend Vector3 operator- (const Vector3& u) { return Vector3(-u[0], -u[1], -u[2]); }

			inline Vector3 operator+(const Vector3& u) const
			{
				return Vector3(_xyz[0]+u._xyz[0],_xyz[1]+u._xyz[1],_xyz[2]+u._xyz[2]);
			}
			inline Vector3 operator-(const Vector3& u) const
			{
				return Vector3(_xyz[0]-u._xyz[0],_xyz[1]-u._xyz[1],_xyz[2]-u._xyz[2]);
			}

			inline double    operator*(const Vector3& u) const
			{
				return _xyz[0]*u._xyz[0] + _xyz[1]*u._xyz[1] + _xyz[2]*u._xyz[2];
			}

			inline Vector3 operator^(const Vector3& v) const
			{
				return Vector3(	_xyz[1]*v._xyz[2] - _xyz[2]*v._xyz[1],
											_xyz[2]*v._xyz[0] - _xyz[0]*v._xyz[2],
											_xyz[0]*v._xyz[1] - _xyz[1]*v._xyz[0]);
			}

			Vector3 operator/ (double v) { return Vector3(_xyz[0]/v,_xyz[1]/v,_xyz[2]/v); }
			Vector3 operator* (double v) { return Vector3(_xyz[0]*v,_xyz[1]*v,_xyz[2]*v); }

			friend Vector3 operator* (double,const Vector3&);
			//@}

			// ---------------------------------------------------------------------------
			//! @name Metrics
			//@{
			double norm       () const;
			double squareNorm () const;
			double infNorm    () const; /// Should be used for most comparisons, for efficiency reasons.
			//@}
			// ---------------------------------------------------------------------------
			//! @name Stream overrides
			//@{
			friend std::ostream& operator<< (std::ostream&,const Vector3&);
			//@}

			double  operator[] (int i) const
			{
				if((i < 0)||(i > 2))
					throw std::runtime_error("Out of bounds in Vector3::operator[]") ;

				return _xyz[i];
			}

			double& operator[] (int i)
			{
				if((i < 0)||(i > 2))
					throw std::runtime_error("Out of bounds in Vector3::operator[]") ;

				return _xyz[i];
			}

		private:
			double _xyz[3];  //!< The 3 vector components

	}; // interface of Vector3
}
#endif // _VECTOR3_H
