source: orxonox.OLD/orxonox/trunk/src/lib/physics/i_physics.cc @ 4348

/* 
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program 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, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Patrick Boenzli
   co-programmer: ...
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_PHYSICS

#include "i_physics.h"
#include "list.h"
#include "string.h"
#include "stdincl.h"

using namespace std;


/**
   \brief standard constructor
*/
IPhysics::IPhysics () 
{
   this->setClassName ("IPhysics");
   this->mass = 0;
   this->massChildren = 0;
   this->forceSum = Vector(0, 0, 0);
}


/**
   \brief standard deconstructor

*/
IPhysics::~IPhysics () 
{
  // delete what has to be deleted here
}

void IPhysics::recalcMass()
{
        float massSum = 0;
        
        tIterator<PNode>* iterator = this->children->getIterator();
        PNode* pn = iterator->nextElement();
        while( pn != NULL) 
    { 
        // todo: find out if children are IPhysics in an efficient way
        if (strcmp( pn->getClassName(), "IPhysics")) {
                        massSum += ((IPhysics*)pn)->getTotalMass();
        }
      pn = iterator->nextElement();
    }
        delete iterator;
        
        if (massSum != this->massChildren ) {
                this->massChildren = massSum;
                if (strcmp( parent->getClassName(), "IPhysics"))
                        ((IPhysics*)parent)->recalcMass();
        } else {
                this->massChildren = massSum;
        }
}
        
        
void IPhysics::addForce( Vector force )
{
        forceSum += force;
}

void IPhysics::addForce(Vector force, Vector grip)
{
        // add central force
        forceSum += force;
        // add momentum
        // todo: some vector math
}
        
void IPhysics::tick( float dt )
{
        Vector acc = forceSum / ( massChildren + mass );
        // todo: introduce kinematics
}