1 /*******************************************************************************
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2 * Copyright 2011 See AUTHORS file.
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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15 ******************************************************************************/
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17 package com.badlogic.gdx.graphics.g2d;
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19 import java.io.BufferedReader;
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20 import java.io.File;
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21 import java.io.FileWriter;
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22 import java.io.IOException;
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23 import java.io.InputStream;
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24 import java.io.InputStreamReader;
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25 import java.io.Writer;
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27 import com.badlogic.gdx.files.FileHandle;
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28 import com.badlogic.gdx.graphics.Texture;
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29 import com.badlogic.gdx.math.collision.BoundingBox;
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30 import com.badlogic.gdx.utils.Array;
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31 import com.badlogic.gdx.utils.Disposable;
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32 import com.badlogic.gdx.utils.GdxRuntimeException;
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33 import com.badlogic.gdx.utils.StreamUtils;
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35 /** See <a href="http://www.badlogicgames.com/wordpress/?p=1255">http://www.badlogicgames.com/wordpress/?p=1255</a>
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36 * @author mzechner */
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37 public class ParticleEffect implements Disposable {
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38 private final Array<ParticleEmitter> emitters;
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39 private BoundingBox bounds;
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41 public ParticleEffect () {
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42 emitters = new Array(8);
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45 public ParticleEffect (ParticleEffect effect) {
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46 emitters = new Array(true, effect.emitters.size);
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47 for (int i = 0, n = effect.emitters.size; i < n; i++)
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48 emitters.add(new ParticleEmitter(effect.emitters.get(i)));
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51 public void start () {
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52 for (int i = 0, n = emitters.size; i < n; i++)
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53 emitters.get(i).start();
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56 public void reset () {
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57 for (int i = 0, n = emitters.size; i < n; i++)
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58 emitters.get(i).reset();
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61 public void update (float delta) {
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62 for (int i = 0, n = emitters.size; i < n; i++)
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63 emitters.get(i).update(delta);
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66 public void draw (SpriteBatch spriteBatch) {
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67 for (int i = 0, n = emitters.size; i < n; i++)
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68 emitters.get(i).draw(spriteBatch);
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71 public void draw (SpriteBatch spriteBatch, float delta) {
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72 for (int i = 0, n = emitters.size; i < n; i++)
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73 emitters.get(i).draw(spriteBatch, delta);
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76 public void allowCompletion () {
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77 for (int i = 0, n = emitters.size; i < n; i++)
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78 emitters.get(i).allowCompletion();
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81 public boolean isComplete () {
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82 for (int i = 0, n = emitters.size; i < n; i++) {
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83 ParticleEmitter emitter = emitters.get(i);
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84 if (!emitter.isComplete()) return false;
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89 public void setDuration (int duration) {
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90 for (int i = 0, n = emitters.size; i < n; i++) {
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91 ParticleEmitter emitter = emitters.get(i);
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92 emitter.setContinuous(false);
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93 emitter.duration = duration;
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94 emitter.durationTimer = 0;
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98 public void setPosition (float x, float y) {
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99 for (int i = 0, n = emitters.size; i < n; i++)
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100 emitters.get(i).setPosition(x, y);
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103 public void setFlip (boolean flipX, boolean flipY) {
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104 for (int i = 0, n = emitters.size; i < n; i++)
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105 emitters.get(i).setFlip(flipX, flipY);
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108 public void flipY () {
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109 for (int i = 0, n = emitters.size; i < n; i++)
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110 emitters.get(i).flipY();
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113 public Array<ParticleEmitter> getEmitters () {
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117 /** Returns the emitter with the specified name, or null. */
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118 public ParticleEmitter findEmitter (String name) {
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119 for (int i = 0, n = emitters.size; i < n; i++) {
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120 ParticleEmitter emitter = emitters.get(i);
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121 if (emitter.getName().equals(name)) return emitter;
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126 public void save (File file) {
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127 Writer output = null;
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129 output = new FileWriter(file);
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131 for (int i = 0, n = emitters.size; i < n; i++) {
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132 ParticleEmitter emitter = emitters.get(i);
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133 if (index++ > 0) output.write("\n\n");
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134 emitter.save(output);
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135 output.write("- Image Path -\n");
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136 output.write(emitter.getImagePath() + "\n");
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138 } catch (IOException ex) {
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139 throw new GdxRuntimeException("Error saving effect: " + file, ex);
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141 StreamUtils.closeQuietly(output);
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145 public void load (FileHandle effectFile, FileHandle imagesDir) {
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146 loadEmitters(effectFile);
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147 loadEmitterImages(imagesDir);
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150 public void load (FileHandle effectFile, TextureAtlas atlas) {
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151 loadEmitters(effectFile);
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152 loadEmitterImages(atlas);
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155 public void loadEmitters (FileHandle effectFile) {
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156 InputStream input = effectFile.read();
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158 BufferedReader reader = null;
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160 reader = new BufferedReader(new InputStreamReader(input), 512);
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162 ParticleEmitter emitter = new ParticleEmitter(reader);
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164 emitter.setImagePath(reader.readLine());
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165 emitters.add(emitter);
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166 if (reader.readLine() == null) break;
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167 if (reader.readLine() == null) break;
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169 } catch (IOException ex) {
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170 throw new GdxRuntimeException("Error loading effect: " + effectFile, ex);
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172 StreamUtils.closeQuietly(reader);
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176 public void loadEmitterImages (TextureAtlas atlas) {
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177 for (int i = 0, n = emitters.size; i < n; i++) {
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178 ParticleEmitter emitter = emitters.get(i);
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179 String imagePath = emitter.getImagePath();
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180 if (imagePath == null) continue;
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181 String imageName = new File(imagePath.replace('\\', '/')).getName();
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182 int lastDotIndex = imageName.lastIndexOf('.');
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183 if (lastDotIndex != -1) imageName = imageName.substring(0, lastDotIndex);
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184 Sprite sprite = atlas.createSprite(imageName);
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185 if (sprite == null) throw new IllegalArgumentException("SpriteSheet missing image: " + imageName);
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186 emitter.setSprite(sprite);
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190 public void loadEmitterImages (FileHandle imagesDir) {
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191 for (int i = 0, n = emitters.size; i < n; i++) {
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192 ParticleEmitter emitter = emitters.get(i);
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193 String imagePath = emitter.getImagePath();
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194 if (imagePath == null) continue;
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195 String imageName = new File(imagePath.replace('\\', '/')).getName();
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196 emitter.setSprite(new Sprite(loadTexture(imagesDir.child(imageName))));
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200 protected Texture loadTexture (FileHandle file) {
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201 return new Texture(file, false);
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204 /** Disposes the texture for each sprite for each ParticleEmitter. */
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205 public void dispose () {
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206 for (int i = 0, n = emitters.size; i < n; i++) {
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207 ParticleEmitter emitter = emitters.get(i);
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208 emitter.getSprite().getTexture().dispose();
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212 /** Returns the bounding box for all active particles. z axis will always be zero. */
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213 public BoundingBox getBoundingBox () {
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214 if (bounds == null) bounds = new BoundingBox();
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216 BoundingBox bounds = this.bounds;
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218 for (ParticleEmitter emitter : this.emitters)
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219 bounds.ext(emitter.getBoundingBox());
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