diff options
Diffstat (limited to 'src/particle/rotationalparticle.cpp')
-rw-r--r-- | src/particle/rotationalparticle.cpp | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/particle/rotationalparticle.cpp b/src/particle/rotationalparticle.cpp new file mode 100644 index 000000000..b72a94b3e --- /dev/null +++ b/src/particle/rotationalparticle.cpp @@ -0,0 +1,96 @@ +/* + * The ManaPlus Client + * Copyright (C) 2006-2009 The Mana World Development Team + * Copyright (C) 2009-2010 The Mana Developers + * Copyright (C) 2011-2013 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 "particle/rotationalparticle.h" + +#include "simpleanimation.h" + +#include "render/graphics.h" + +#include <math.h> + +#include "debug.h" + +static const double PI = M_PI; +static const float PI2 = 2 * M_PI; + +RotationalParticle::RotationalParticle(Map *const map, + Animation *const animation) : + ImageParticle(map, nullptr), + mAnimation(new SimpleAnimation(animation)) +{ +} + +RotationalParticle::RotationalParticle(Map *const map, + const XmlNodePtr animationNode, + const std::string& dyePalettes): + ImageParticle(map, nullptr), + mAnimation(new SimpleAnimation(animationNode, dyePalettes)) +{ +} + +RotationalParticle::~RotationalParticle() +{ + delete mAnimation; + mAnimation = nullptr; + mImage = nullptr; +} + +bool RotationalParticle::update() +{ + if (!mAnimation) + return false; + + // TODO: cache velocities to avoid spamming atan2() + + const int size = mAnimation->getLength(); + if (!size) + return false; + + float rad = static_cast<float>(atan2(mVelocity.x, mVelocity.y)); + if (rad < 0) + rad = PI2 + rad; + + const float range = static_cast<const float>(PI / size); + + // Determines which frame the particle should play + if (rad < range || rad > PI2 - 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(); +} |