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/*
* The Mana World
* Copyright (C) 2006-2010 The Mana World Development Team
*
* This file is part of The Mana World.
*
* 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 of the License, or
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "rotationalparticle.h"
#include "graphics.h"
#include "simpleanimation.h"
#define PI 3.14159265
RotationalParticle::RotationalParticle(Map *map, Animation *animation):
ImageParticle(map, NULL),
mAnimation(new SimpleAnimation(animation))
{
}
RotationalParticle::RotationalParticle(Map *map, xmlNodePtr animationNode):
ImageParticle(map, 0),
mAnimation(new SimpleAnimation(animationNode))
{
}
RotationalParticle::~RotationalParticle()
{
delete mAnimation;
mImage = NULL;
}
bool RotationalParticle::update()
{
// TODO: cache velocities to avoid spamming atan2()
float rad = atan2(mVelocity.x, mVelocity.y);
if (rad < 0)
rad = PI + (PI + rad);
int size = mAnimation->getLength();
float range = PI / size;
// Determines which frame the particle should play
if (rad < range || rad > ((PI*2) - range))
{
mAnimation->setFrame(0);
}
else
{
for (int c = 1; c < size; c++)
{
if (((c * (2 * range)) - range) < rad && rad < ((c * (2 * range)) + range))
{
mAnimation->setFrame(c);
break;
}
}
}
mImage = mAnimation->getCurrentImage();
return Particle::update();
}
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