/* * The ManaPlus Client * Copyright (C) 2006-2009 The Mana World Development Team * Copyright (C) 2009-2010 The Mana Developers * Copyright (C) 2011 The ManaPlus Developers * * This file is part of The ManaPlus Client. * * 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, see <http://www.gnu.org/licenses/>. */ #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; mAnimation = 0; mImage = 0; } bool RotationalParticle::update() { if (!mAnimation) return false; // TODO: cache velocities to avoid spamming atan2() float rad = static_cast<float>(atan2(mVelocity.x, mVelocity.y)); if (rad < 0) rad = static_cast<float>(PI + (PI + rad)); int size = mAnimation->getLength(); float range = static_cast<float>(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 (((static_cast<float>(c) * (2 * range)) - range) < rad && rad < ((static_cast<float>(c) * (2 * range)) + range)) { mAnimation->setFrame(c); break; } } } mImage = mAnimation->getCurrentImage(); return Particle::update(); }