Particles.java

package org.jbox2d.testbed.tests;

import org.jbox2d.collision.shapes.CircleShape;
import org.jbox2d.collision.shapes.PolygonShape;
import org.jbox2d.common.Vec2;
import org.jbox2d.dynamics.Body;
import org.jbox2d.dynamics.BodyDef;
import org.jbox2d.dynamics.BodyType;
import org.jbox2d.particle.ParticleGroupDef;
import org.jbox2d.particle.ParticleType;
import org.jbox2d.testbed.framework.TestbedTest;

public class Particles extends TestbedTest {
  @Override
  public String getTestName() {
    return "Particles";
  }

  @Override
  public void initTest(boolean deserialized) {
    {
      {
        PolygonShape shape = new PolygonShape();
        Vec2[] vertices =
            new Vec2[] {new Vec2(-40, -10), new Vec2(40, -10), new Vec2(40, 0), new Vec2(-40, 0)};
        shape.set(vertices, 4);
        getGroundBody().createFixture(shape, 0.0f);
      }

      {
        PolygonShape shape = new PolygonShape();
        Vec2[] vertices =
            {new Vec2(-40, -1), new Vec2(-20, -1), new Vec2(-20, 20), new Vec2(-40, 30)};
        shape.set(vertices, 4);
        getGroundBody().createFixture(shape, 0.0f);
      }

      {
        PolygonShape shape = new PolygonShape();
        Vec2[] vertices = {new Vec2(20, -1), new Vec2(40, -1), new Vec2(40, 30), new Vec2(20, 20)};
        shape.set(vertices, 4);
        getGroundBody().createFixture(shape, 0.0f);
      }
    }

    m_world.setParticleRadius(0.35f);
    m_world.setParticleDamping(0.2f);

    {
      CircleShape shape = new CircleShape();
      shape.m_p.set(0, 30);
      shape.m_radius = 20;
      ParticleGroupDef pd = new ParticleGroupDef();
      pd.flags = ParticleType.b2_waterParticle;
      pd.shape = shape;
      m_world.createParticleGroup(pd);
    }

    {
      BodyDef bd = new BodyDef();
      bd.type = BodyType.DYNAMIC;
      Body body = m_world.createBody(bd);
      CircleShape shape = new CircleShape();
      shape.m_p.set(0, 80);
      shape.m_radius = 5;
      body.createFixture(shape, 0.5f);
    }

  }
}