glc_camera.h

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

 This file is part of the GLC-lib library.
 Copyright (C) 2005-2008 Laurent Ribon (laumaya@users.sourceforge.net)
 Copyright (C) 2009 Laurent Bauer
 http://glc-lib.sourceforge.net

 GLC-lib 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.

 GLC-lib 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 GLC-lib; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

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


#ifndef GLC_CAMERA_H_
#define GLC_CAMERA_H_

#include "../glc_object.h"
#include "../maths/glc_vector3d.h"
#include "../maths/glc_matrix4x4.h"

#include "../glc_config.h"




class GLC_LIB_EXPORT GLC_Camera :
        public GLC_Object
{


public:

   GLC_Camera();

        /* VectUp and VectCam could not be parallel
         * VectUp could not be NULL
         * VectCam could not be NULL */
   GLC_Camera(const GLC_Point3d &, const GLC_Point3d &, const GLC_Vector3d &);

   GLC_Camera(const GLC_Camera&);



public:
        inline double distEyeTarget(void) const
        {return (m_Eye - m_Target).length();}

        inline GLC_Point3d eye(void) const
        {return m_Eye;}

        inline GLC_Point3d target(void) const
        {return m_Target;}

        inline GLC_Vector3d upVector(void) const
        {return m_VectUp;}

        inline GLC_Vector3d forward(void) const
        {return m_Target - m_Eye;}

        inline GLC_Vector3d sideVector() const
        {return ((m_Target - m_Eye).normalize() ^ m_VectUp).normalize();}

        inline GLC_Matrix4x4 viewMatrix(void) const
        {return m_ModelViewMatrix;}

        bool operator==(const GLC_Camera&) const;

    bool isAlmostEqualTo(const GLC_Camera&, const double distanceAccuracy=0.05) const;

        inline GLC_Vector3d defaultUpVector() const
        {return m_DefaultVectUp;}

        GLC_Camera frontView() const;

        GLC_Camera rearView() const;

        GLC_Camera rightView() const;

        GLC_Camera leftView() const;

        GLC_Camera topView() const;

        GLC_Camera bottomView() const;


        GLC_Camera isoView() const;

        inline GLC_Matrix4x4 modelViewMatrix() const
        {
                GLC_Matrix4x4 translate(-m_Eye);
                GLC_Matrix4x4 modelView= GLC_Matrix4x4(m_ModelViewMatrix * translate);
                return modelView;
        }




public:
        GLC_Camera& orbit(GLC_Vector3d VectOldPoss, GLC_Vector3d VectCurPoss);

        GLC_Camera& pan(GLC_Vector3d VectDep);


        GLC_Camera& zoom(double factor);

        GLC_Camera& move(const GLC_Matrix4x4 &MatMove);

        GLC_Camera& rotateAround(const GLC_Vector3d&, const double&, const GLC_Point3d&);

        GLC_Camera& rotateAroundTarget(const GLC_Vector3d&, const double&);

        GLC_Camera& translate(const GLC_Vector3d &VectTrans);

        /* VectUp and VectCam could not be parallel
         * VectUp could not be NULL
         * VectCam could not be NULL */
        GLC_Camera& setCam(GLC_Point3d Eye, GLC_Point3d Target, GLC_Vector3d Up);

        GLC_Camera& setCam(const GLC_Camera&);

        GLC_Camera& setEyeCam(const GLC_Point3d &Eye);

        GLC_Camera& setTargetCam(const GLC_Point3d &Target);

        GLC_Camera& setUpCam(const GLC_Vector3d &Up);

        GLC_Camera& setDistEyeTarget(double Longueur);

        GLC_Camera& setDistTargetEye(double Longueur);

        GLC_Camera& operator=(const GLC_Camera&);


        inline GLC_Camera& setDefaultUpVector(const GLC_Vector3d& up)
        {
                Q_ASSERT((up == glc::X_AXIS) || (up == glc::Y_AXIS) || (up == glc::Z_AXIS));
                m_DefaultVectUp= up;
                return *this;
        }

        inline void setFrontView()
        {setCam(frontView());}

        inline void setRearView()
        {setCam(rearView());}

        inline void setRightView()
        {setCam(rightView());}

        inline void setLeftView()
        {setCam(leftView());}

        inline void setTopView()
        {setCam(topView());}

        inline void setBottomView()
        {setCam(bottomView());}


        inline void setIsoView()
        {setCam(isoView());}




public:
   void glExecute();


// Private services Functions
private:
        void createMatComp(void);


// Private Member
private:
        GLC_Point3d m_Eye;

        GLC_Point3d m_Target;

        GLC_Vector3d m_VectUp;

        GLC_Matrix4x4 m_ModelViewMatrix;

        GLC_Vector3d m_DefaultVectUp;
};
#endif //GLC_CAMERA_H_