laPivot.h

/*

Jump'n'Run Engine
http://www.atanaslaskov.com/jnr/

BSD LICENSE
Copyright (c) 2007-2013, Atanas Laskov
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/
#ifndef M_PH_POINT_H
#define M_PH_POINT_H




class laPivot: public laPoint3
{
protected:

    //Forces acting on the object
    //
    //std::list<laPhForce*> lsForces;

    //Internal breakdown of the simulate() methods
    //
    inline laPoint3 _displacement_vector( const laTimer &t, const laPoint3 ve ) const{
        return ve * (t.delta()*M_UNIT);
    }
    //void _sim_forces(laTimer &t, M_BOOL bAnimatePosition = M_TRUE);   // NOTE: Not implemented

    void _sim_gravitation(laTimer &t);
    laPoint3 _sim_collisions(laTimer &t);

    // Collsion algorithm and range
    //
    static class laCollider         *_pCollider;
    static class laCollisionDomain  *_pFirstDomain;
    static unsigned long                _nDomains;

public:

    // Rotation angles
    //
    double angleX;
    double angleY;
    double angleZ;

    // 3D geometry offset from the pivot
    laPoint3 ptGeometryOffset;

    // Physical parameters
    //
    laPoint3        velocity;
    laPoint3        size;
    double          mass;

    // Gravitation and collision-detection flags
    //
    M_BOOL bSimulateGravitation;
    M_BOOL bSimulateCollision;

    // Flag indicating wether the object is currently resting on a surface,
    // and the Y coordinate of that surface.
    // This can be used for projecting a pseudo-shadow
    //
    M_BOOL bOnGround;
    double  dShadowY;

    //Pointer to a trap if the object is being affected by one; Otherwise NULL.
    rpgTrap*   pTrap;

    // Constructor
    //
    laPivot(void);

    // Simulate forces and collisons
    //
    inline void simulate(laTimer &t)
    {
        PROFILE_COL(laPivot_simulate);
        laPoint3 dv;

        if(bSimulateCollision)
        {
            ASSERT(_pCollider, "Nil collider");
            ASSERT(_pFirstDomain, "Nil first collision domain domain");

            if( bSimulateGravitation )  _sim_gravitation(t);

            dv = _sim_collisions(t);
        }
        else dv = _displacement_vector(t, velocity);

        x( x() + dv.x() );
        y( y() + dv.y() );
    }

    // Project false shadow under the object
    //
    void projectShadow();

    // Query the collider with a vector
    // NOTE: Can be used for implementing AI "tentacles" i.e. sensing the surroundsings of a monster
    //
    laPoint3 projectVector( laPoint3 vector, M_BOOL *pTrapFlag = NULL, rpgTrap** ppTrap = NULL);

    // Setup collision detection range
    //
    static void colliderRange( class laCollisionDomain *pfirst, unsigned long n) {
        _pFirstDomain   = pfirst;
        _nDomains       = n;
    }

    // Misc
    //

    laPivot &operator =(const laPoint3 &pt) {
        x( pt.x() );    y( pt.y() );    z( pt.z() );
        return *this;
    }

    // Acting forces
    //
    /*unsigned      forceAdd(laPhForce* f);
    unsigned      forceAdd(laPhForce* f, double sec);
    laPhForce* forceRemove(unsigned id);
    laPhForce* forceGet(unsigned id);*/
};
#endif //#ifndef M_PH_POINT_H