Evan Debenham
aed303672a
changed package and application names to differentiate from main PD release
143 lines
3.5 KiB
Java
143 lines
3.5 KiB
Java
/*
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* Pixel Dungeon
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* Copyright (C) 2012-2014 Oleg Dolya
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package com.shatteredpixel.shatteredpixeldungeon.effects;
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import javax.microedition.khronos.opengles.GL10;
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import android.opengl.GLES20;
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import com.watabou.noosa.Game;
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import com.watabou.noosa.Group;
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import com.watabou.noosa.Image;
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import com.watabou.noosa.audio.Sample;
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import com.shatteredpixel.shatteredpixeldungeon.Assets;
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import com.shatteredpixel.shatteredpixeldungeon.DungeonTilemap;
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import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
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import com.watabou.utils.Callback;
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import com.watabou.utils.Random;
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public class Lightning extends Group {
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private static final float DURATION = 0.3f;
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private float life;
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private int length;
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private float[] cx;
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private float[] cy;
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private Image[] arcsS;
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private Image[] arcsE;
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private Callback callback;
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public Lightning( int[] cells, int length, Callback callback ) {
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super();
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this.callback = callback;
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Image proto = Effects.get( Effects.Type.LIGHTNING );
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float ox = 0;
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float oy = proto.height / 2;
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this.length = length;
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cx = new float[length];
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cy = new float[length];
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for (int i=0; i < length; i++) {
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int c = cells[i];
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cx[i] = (c % Level.WIDTH + 0.5f) * DungeonTilemap.SIZE;
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cy[i] = (c / Level.WIDTH + 0.5f) * DungeonTilemap.SIZE;
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}
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arcsS = new Image[length - 1];
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arcsE = new Image[length - 1];
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for (int i=0; i < length - 1; i++) {
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Image arc = arcsS[i] = new Image( proto );
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arc.x = cx[i] - arc.origin.x;
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arc.y = cy[i] - arc.origin.y;
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arc.origin.set( ox, oy );
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add( arc );
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arc = arcsE[i] = new Image( proto );
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arc.origin.set( ox, oy );
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add( arc );
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}
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life = DURATION;
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Sample.INSTANCE.play( Assets.SND_LIGHTNING );
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}
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private static final double A = 180 / Math.PI;
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@Override
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public void update() {
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super.update();
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if ((life -= Game.elapsed) < 0) {
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killAndErase();
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if (callback != null) {
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callback.call();
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}
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} else {
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float alpha = life / DURATION;
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for (int i=0; i < length - 1; i++) {
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float sx = cx[i];
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float sy = cy[i];
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float ex = cx[i+1];
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float ey = cy[i+1];
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float x2 = (sx + ex) / 2 + Random.Float( -4, +4 );
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float y2 = (sy + ey) / 2 + Random.Float( -4, +4 );
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float dx = x2 - sx;
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float dy = y2 - sy;
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Image arc = arcsS[i];
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arc.am = alpha;
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arc.angle = (float)(Math.atan2( dy, dx ) * A);
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arc.scale.x = (float)Math.sqrt( dx * dx + dy * dy ) / arc.width;
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dx = ex - x2;
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dy = ey - y2;
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arc = arcsE[i];
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arc.am = alpha;
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arc.angle = (float)(Math.atan2( dy, dx ) * A);
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arc.scale.x = (float)Math.sqrt( dx * dx + dy * dy ) / arc.width;
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arc.x = x2 - arc.origin.x;
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arc.y = y2 - arc.origin.x;
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}
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}
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}
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@Override
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public void draw() {
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GLES20.glBlendFunc( GL10.GL_SRC_ALPHA, GL10.GL_ONE );
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super.draw();
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GLES20.glBlendFunc( GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA );
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}
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}
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