ViscousDrag.cpp

/***************************************************************************
 *   This file is part of OpenCAL: Open Computer Animation Library         *
 *   I created OpenCAL as my master's thesis Computer Science (multimedia) *
 *   at the tUL university in Diepenbeek, Belgium                          *
 *                                                                         *
 *   Copyright (C) 2003-2004 by Jeroen Dierckx                             *
 *   jeroen.dierckx@student.luc.ac.be                                      *
 *                                                                         *
 ***************************************************************************/

// Includes
#include "ViscousDrag.h"
#include <OpenCAL/PhysicalObject.h>
#include <OpenCAL/PhysicsSystem.h>
#include <OpenCAL/ObjectIterator.h>
using namespace OpenCAL;

using namespace std;


/******************************
* Constructors and destructor *
******************************/

ViscousDrag::ViscousDrag(PhysicsSystem *parent, float drag)
: Force(parent), m_drag(drag)
{
}

ViscousDrag::~ViscousDrag()
{
}


/************************
* Get and set functions *
************************/


/******************
* Other functions *
******************/

void ViscousDrag::execute(float seconds)
{

    //if(!m_enabled) return;
    Force::execute(seconds);

    ObjectIterator it(m_parent);
    while(*it)
    {
        PhysicalObject *object = (PhysicalObject *) *it;
        object->addForce(-m_drag * object->getVelocity());

        ++it;
    }

/*
    for(unsigned int i = 0; i < m_parent->numObjects(); ++i)
    {
        PhysicalObject *object = (PhysicalObject *) m_parent->getObject(i);
        object->addForce(-m_drag * object->getVelocity());
    }
*/
}


/**********************
* Protected functions *
**********************/

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