Force_Constant.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code 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 3 of the License, or
(at your option) any later version.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../../idlib/precompiled.h"
#pragma hdrstop

#include "../Game_local.h"

CLASS_DECLARATION( idForce, idForce_Constant )
END_CLASS

/*
================
idForce_Constant::idForce_Constant
================
*/
idForce_Constant::idForce_Constant( void ) {
        force           = vec3_zero;
        physics         = NULL;
        id                      = 0;
        point           = vec3_zero;
}

/*
================
idForce_Constant::~idForce_Constant
================
*/
idForce_Constant::~idForce_Constant( void ) {
}

/*
================
idForce_Constant::Save
================
*/
void idForce_Constant::Save( idSaveGame *savefile ) const {
        savefile->WriteVec3( force );
        savefile->WriteInt( id );
        savefile->WriteVec3( point );
}

/*
================
idForce_Constant::Restore
================
*/
void idForce_Constant::Restore( idRestoreGame *savefile ) {
        // Owner needs to call SetPhysics!!
        savefile->ReadVec3( force );
        savefile->ReadInt( id );
        savefile->ReadVec3( point );
}

/*
================
idForce_Constant::SetPosition
================
*/
void idForce_Constant::SetPosition( idPhysics *physics, int id, const idVec3 &point ) {
        this->physics = physics;
        this->id = id;
        this->point = point;
}

/*
================
idForce_Constant::SetForce
================
*/
void idForce_Constant::SetForce( const idVec3 &force ) {
        this->force = force;
}

/*
================
idForce_Constant::SetPhysics
================
*/
void idForce_Constant::SetPhysics( idPhysics *physics ) {
        this->physics = physics;
}

/*
================
idForce_Constant::Evaluate
================
*/
void idForce_Constant::Evaluate( int time ) {
        idVec3 p;

        if ( !physics ) {
                return;
        }

        p = physics->GetOrigin( id ) + point * physics->GetAxis( id );

        physics->AddForce( id, p, force );
}

/*
================
idForce_Constant::RemovePhysics
================
*/
void idForce_Constant::RemovePhysics( const idPhysics *phys ) {
        if ( physics == phys ) {
                physics = NULL;
        }
}