DominoTest.java

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 * Copyright (c) 2013, Daniel Murphy
 * All rights reserved.
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 * are permitted provided that the following conditions are met:
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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package org.jbox2d.testbed.tests;

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.dynamics.FixtureDef;
import org.jbox2d.testbed.framework.TestbedTest;

public class DominoTest extends TestbedTest {

  @Override
  public boolean isSaveLoadEnabled() {
    return true;
  }

  public void initTest(boolean argDeserialized) {
    if(argDeserialized){
      return;
    }
    
    { // Floor
      FixtureDef fd = new FixtureDef();
      PolygonShape sd = new PolygonShape();
      sd.setAsBox(50.0f, 10.0f);
      fd.shape = sd;

      BodyDef bd = new BodyDef();
      bd.position = new Vec2(0.0f, -10.0f);
      getWorld().createBody(bd).createFixture(fd);

    }

    { // Platforms
      for (int i = 0; i < 4; i++) {
        FixtureDef fd = new FixtureDef();
        PolygonShape sd = new PolygonShape();
        sd.setAsBox(15.0f, 0.125f);
        fd.shape = sd;

        BodyDef bd = new BodyDef();
        bd.position = new Vec2(0.0f, 5f + 5f * i);
        getWorld().createBody(bd).createFixture(fd);
      }
    }

    {
      FixtureDef fd = new FixtureDef();
      PolygonShape sd = new PolygonShape();
      sd.setAsBox(0.125f, 2f);
      fd.shape = sd;
      fd.density = 25.0f;

      BodyDef bd = new BodyDef();
      bd.type = BodyType.DYNAMIC;
      float friction = .5f;
      int numPerRow = 25;

      for (int i = 0; i < 4; ++i) {
        for (int j = 0; j < numPerRow; j++) {
          fd.friction = friction;
          bd.position = new Vec2(-14.75f + j * (29.5f / (numPerRow - 1)), 7.3f + 5f * i);
          if (i == 2 && j == 0) {
            bd.angle = -0.1f;
            bd.position.x += .1f;
          } else if (i == 3 && j == numPerRow - 1) {
            bd.angle = .1f;
            bd.position.x -= .1f;
          } else
            bd.angle = 0f;
          Body myBody = getWorld().createBody(bd);
          myBody.createFixture(fd);
        }
      }
    }
  }

  @Override
  public String getTestName() {
    return "Dominos";
  }
}