Android Open Source - libgdx-demo-pax-britannica Explosion Particle Emitter

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License

The source code is released under:

Copyright (c) 2010 Ben Abraham, Renaud B?dard, Henk Boom, Daniel Burton, Matthew Gallant Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated ...

Java Source Code

package de.swagner.paxbritannica.particlesystem;
/*from ww w . jav a  2s.co  m*/
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;

import de.swagner.paxbritannica.GameInstance;
import de.swagner.paxbritannica.Resources;

public class ExplosionParticleEmitter extends ParticleEmitter {

  public ExplosionParticleEmitter() {
    super();

    life = 0.5f;
    damping =1f;
    delta_scale = 1.0f;

    set(Resources.getInstance().explosion);
  }

  public void addParticle(Vector2 position, float scale) {
    super.addParticle(position, new Vector2(0,0), life, scale);
  }

  public void addBigExplosion(Vector2 position) {
    delta_scale = 5;
    addParticle(position, 0.5f);
    Vector2 random = new Vector2(MathUtils.cos((float) ((MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random()))),
        (float) (MathUtils.sin(MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random())));
    for (int i = 1; i <= 20; ++i) {
      Vector2 vel = new Vector2().set(random).add(random);
      Vector2 velp = new Vector2().set(vel).scl(i / 20.f * 2.f);
      Vector2 offset = new Vector2().set(random).scl(10);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), velp);
    }
    for (int i = 1; i <= 5; ++i) {
      Vector2 vel = new Vector2(MathUtils.random() * 2 - 1, MathUtils.random() * 2 - 1).scl(4);
      Vector2 offset = new Vector2().set(random).scl(3);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), vel);
    }
    for (int i = 1; i <= 50; ++i) {
      Vector2 offset = new Vector2().set(random).scl(17);
      GameInstance.getInstance().bigBubbleParticles.addParticle(new Vector2(position.x + offset.x, position.y + offset.y));
    }
  }

  public void addMediumExplosion(Vector2 position) {
    delta_scale = 3;
    addParticle(position, 0.4f);
    Vector2 random = new Vector2(MathUtils.cos((float) ((MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random()))),
        (float) (MathUtils.sin(MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random())));
    for (int i = 1; i <= 10; ++i) {
      Vector2 vel = new Vector2().set(random).add(random);
      Vector2 velp = new Vector2().set(vel).scl(i / 20.f * 2.f);
      Vector2 offset = new Vector2().set(random).scl(10);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), velp);
    }
    for (int i = 1; i <= 3; ++i) {
      Vector2 vel = new Vector2(MathUtils.random() * 2 - 1, MathUtils.random() * 2 - 1).scl(3);
      Vector2 offset = new Vector2().set(random).scl(3);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), vel);
    }
    for (int i = 1; i <= 20; ++i) {
      Vector2 offset = new Vector2().set(random).scl(2);
      GameInstance.getInstance().bigBubbleParticles.addParticle(new Vector2(position.x + offset.x, position.y + offset.y));
    }
  }

  public void addSmallExplosion(Vector2 position) {
    delta_scale = 2;
    addParticle(position, 0.3f);
    Vector2 random = new Vector2(MathUtils.cos((float) ((MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random()))),
        (float) (MathUtils.sin(MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random())));
    for (int i = 1; i <= 2; ++i) {
      Vector2 vel = new Vector2().set(random).add(random);
      Vector2 velp = new Vector2().set(vel).scl(i / 20.f * 2.f);
      Vector2 offset = new Vector2().set(random).scl(10);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), velp);
    }
    for (int i = 1; i <= 2; ++i) {
      Vector2 vel = new Vector2(MathUtils.random() * 2 - 1, MathUtils.random() * 2 - 1).scl(2);
      Vector2 offset = new Vector2().set(random).scl(3);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), vel);
    }
    for (int i = 1; i <= 10; ++i) {
      Vector2 offset = new Vector2().set(random).scl(2);
      GameInstance.getInstance().bigBubbleParticles.addParticle(new Vector2(position.x + offset.x, position.y + offset.y));
    }
  }

  public void addTinyExplosion(Vector2 position) {
    delta_scale = 1;
    addParticle(position, 0.1f);
    Vector2 random = new Vector2(MathUtils.cos((float) ((MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random()))),
        (float) (MathUtils.sin(MathUtils.random() * MathUtils.PI * 2f) * Math.sqrt(MathUtils.random())));
    for (int i = 1; i <= 1; ++i) {
      Vector2 vel = new Vector2().set(random).add(random);
      Vector2 velp = new Vector2().set(vel).scl(i / 20.f * 2.f);
      Vector2 offset = new Vector2().set(random).scl(10);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), velp);
    }
    for (int i = 1; i <= 1; ++i) {
      Vector2 vel = new Vector2(MathUtils.random() * 2 - 1, MathUtils.random() * 2 - 1);
      Vector2 offset = new Vector2().set(random).scl(3);
      GameInstance.getInstance().sparkParticles.addLaserExplosion(new Vector2(position.x + offset.x, position.y + offset.y), vel);
    }
    for (int i = 1; i <= 5; ++i) {
      Vector2 offset = new Vector2().set(random).scl(17);
      GameInstance.getInstance().bigBubbleParticles.addParticle(new Vector2(position.x + offset.x, position.y + offset.y));
    }
  }
}

Java Source Code List

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