created a gravity well

[physics.git] / src / effectManager.cpp

/*
 *  Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com.
 *
 *  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 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "effectManager.h"

#include "Effects/Effect.h"
#include "Effects/Gravity.h"
#include "Effects/GravityWell.h"
#include "Effects/Screen.h"

#include "Vector2.h"

/// ***** Private Variables *****

Effect** effects;
int numEffects;

/// ***** Initializers/Cleaners *****

void effect::init()
{
    numEffects = 3;
    effects = new Effect*[numEffects]();

    effects[0] = new Gravity();
    effects[1] = new GravityWell(Vector2(400,400));
    effects[2] = new Screen();
}
void effect::clean()
{
    for(int i=0; i < numEffects; i++)
    {
        delete effects[i];
    }

    delete[] effects;
}

/// ***** Public Methods *****

Vector2 effect::positionDelta(const PhysicsEntity* e, float time_step)
{
    Vector2 acc(0,0);

    for(int i=0; i < numEffects; i++)
    {
        acc += effects[i]->positionDelta(e, time_step);
    }

    return acc;
}
Vector2 effect::velocityDelta(const PhysicsEntity* e, float time_step)
{
    Vector2 acc(0,0);

    for(int i=0; i < numEffects; i++)
    {
        acc += effects[i]->velocityDelta(e, time_step);
    }

    return acc;
}
Vector2 effect::forceDelta(const PhysicsEntity* e, float time_step)
{
    Vector2 acc(0,0);

    for(int i=0; i < numEffects; i++)
    {
        acc += effects[i]->forceDelta(e, time_step);
    }

    return acc;
}