Ray.h

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/*********************************************************\
 *  File: Ray.h                                          *
 *
 *  Copyright (C) 2002-2012 The PixelLight Team (http://www.pixellight.org/)
 *
 *  This file is part of PixelLight.
 *
 *  PixelLight is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  PixelLight 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with PixelLight. If not, see <http://www.gnu.org/licenses/>.
\*********************************************************/


#ifndef __PLMATH_RAY_H__
#define __PLMATH_RAY_H__
#pragma once


//[-------------------------------------------------------]
//[ Includes                                              ]
//[-------------------------------------------------------]
#include "PLMath/Vector3.h"


//[-------------------------------------------------------]
//[ Namespace                                             ]
//[-------------------------------------------------------]
namespace PLMath {


//[-------------------------------------------------------]
//[ Classes                                               ]
//[-------------------------------------------------------]
/**
*  @brief
*    Ray class (infinite length, in both directions)
*/
class Ray {


    //[-------------------------------------------------------]
    //[ Public functions                                      ]
    //[-------------------------------------------------------]
    public:
        /**
        *  @brief
        *    Default constructor setting all position and direction components to 0
        */
        inline Ray();

        /**
        *  @brief
        *    Copy constructor
        *
        *  @param[in] cSource
        *    Source to copy from
        */
        inline Ray(const Ray &cSource);

        /**
        *  @brief
        *    Destructor
        */
        inline ~Ray();

        /**
        *  @brief
        *    Copy operator
        *
        *  @param[in] cSource
        *    Source to copy from
        *
        *  @return
        *    Reference to this instance
        */
        inline Ray &operator =(const Ray &cSource);

        /**
        *  @brief
        *    Set the current ray using a line
        *
        *  @param[in] vLineStartPos
        *    Line start position
        *  @param[in] vLineEndPos
        *    Line end position
        */
        inline void Set(const Vector3 &vLineStartPos, const Vector3 &vLineEndPos);

        /**
        *  @brief
        *    Returns the current position
        *
        *  @return
        *    Current position
        */
        inline const Vector3 &GetPos() const;

        /**
        *  @brief
        *    Set the current position
        *
        *  @param[in] fX
        *    X component of the new position
        *  @param[in] fY
        *    Y component of the new position
        *  @param[in] fZ
        *    Z component of the new position
        */
        inline void SetPos(float fX = 0.0f, float fY = 0.0f, float fZ = 0.0f);

        /**
        *  @brief
        *    Set the current position
        *
        *  @param[in] vPos
        *    New position
        */
        inline void SetPos(const Vector3 &vPos);

        /**
        *  @brief
        *    Returns the ray direction
        *
        *  @return
        *    Ray direction
        */
        inline const Vector3 &GetDir() const;

        /**
        *  @brief
        *    Set the ray direction
        *
        *  @param[in] fX
        *    X component of the new direction vector
        *  @param[in] fY
        *    Y component of the new direction vector
        *  @param[in] fZ
        *    Z component of the new direction vector
        */
        inline void SetDir(float fX = 0.0f, float fY = 0.0f, float fZ = 0.0f);

        /**
        *  @brief
        *    Set the ray direction
        *
        *  @param[in] vDir
        *    New ray direction
        */
        inline void SetDir(const Vector3 &vDir);


    //[-------------------------------------------------------]
    //[ Private data                                          ]
    //[-------------------------------------------------------]
    private:
        Vector3 m_vPos; /**< Ray origin */
        Vector3 m_vDir; /**< Ray direction */


};


//[-------------------------------------------------------]
//[ Namespace                                             ]
//[-------------------------------------------------------]
} // PLMath


//[-------------------------------------------------------]
//[ Implementation                                        ]
//[-------------------------------------------------------]
#include "PLMath/Ray.inl"


#endif // __PLMATH_RAY_H__