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authorAndrei Karas <akaras@inbox.ru>2011-01-02 01:48:38 +0200
committerAndrei Karas <akaras@inbox.ru>2011-01-02 02:41:24 +0200
commit3eeae12c498d1a4dbe969462d2ba841f77ee3ccb (patch)
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Initial commit.
This code based on mana client http://www.gitorious.org/mana/mana and my private repository.
Diffstat (limited to 'src/rotationalparticle.cpp')
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1 files changed, 82 insertions, 0 deletions
diff --git a/src/rotationalparticle.cpp b/src/rotationalparticle.cpp
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+/*
+ * The Mana Client
+ * Copyright (C) 2006-2009 The Mana World Development Team
+ * Copyright (C) 2009-2010 The Mana Developers
+ *
+ * This file is part of The Mana 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();
+}