Examples of BodyDef

com.badlogic.gdx.physics.box2d.BodyDef
org.jbox2d.dynamics.BodyDef
A body definition holds all the data needed to construct a rigid body. You can safely re-use body definitions. Shapes are added to a body after construction. @author daniel

Examples of org.jbox2d.dynamics.BodyDef

    if (m_bodies[m_bodyIndex] != null) {
      getWorld().destroyBody(m_bodies[m_bodyIndex]);
      m_bodies[m_bodyIndex] = null;
    }


    BodyDef bd = new BodyDef();


    float x = (float) Math.random() * 20 - 10;
    float y = (float) Math.random() * 20;
    bd.position.set(x, y);
    bd.angle = (float) Math.random() * MathUtils.TWOPI - MathUtils.PI;

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Examples of org.jbox2d.dynamics.BodyDef

    Body ground = null;
    {
      PolygonShape sd = new PolygonShape();
      sd.setAsBox(50.0f, 0.4f);


      BodyDef bd = new BodyDef();
      bd.position.set(0.0f, 0.0f);
      ground = getWorld().createBody(bd);
      ground.createFixture(sd, 0f);


      sd.setAsBox(0.4f, 50.0f, new Vec2(-10.0f, 0.0f), 0.0f);
      ground.createFixture(sd, 0f);
      sd.setAsBox(0.4f, 50.0f, new Vec2(10.0f, 0.0f), 0.0f);
      ground.createFixture(sd, 0f);
    }


    ConstantVolumeJointDef cvjd = new ConstantVolumeJointDef();


    float cx = 0.0f;
    float cy = 10.0f;
    float rx = 5.0f;
    float ry = 5.0f;
    int nBodies = 20;
    float bodyRadius = 0.5f;
    for (int i = 0; i < nBodies; ++i) {
      float angle = MathUtils.map(i, 0, nBodies, 0, 2 * 3.1415f);
      BodyDef bd = new BodyDef();
      // bd.isBullet = true;
      bd.fixedRotation = true;


      float x = cx + rx * (float) Math.sin(angle);
      float y = cy + ry * (float) Math.cos(angle);
      bd.position.set(new Vec2(x, y));
      bd.type = BodyType.DYNAMIC;
      Body body = getWorld().createBody(bd);


      FixtureDef fd = new FixtureDef();
      CircleShape cd = new CircleShape();
      cd.m_radius = bodyRadius;
      fd.shape = cd;
      fd.density = 1.0f;
      body.createFixture(fd);
      cvjd.addBody(body);
    }


    cvjd.frequencyHz = 10.0f;
    cvjd.dampingRatio = 1.0f;
    cvjd.collideConnected = false;
    getWorld().createJoint(cvjd);


    BodyDef bd2 = new BodyDef();
    bd2.type = BodyType.DYNAMIC;
    PolygonShape psd = new PolygonShape();
    psd.setAsBox(3.0f, 1.5f, new Vec2(cx, cy + 15.0f), 0.0f);
    bd2.position = new Vec2(cx, cy + 15.0f);
    Body fallingBox = getWorld().createBody(bd2);

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Examples of org.jbox2d.dynamics.BodyDef

    Vec2 gravity = new Vec2(0, -10f);
    m_world = model.getWorldCreator().createWorld(gravity);
    bomb = null;
    mouseJoint = null;


    BodyDef bodyDef = new BodyDef();
    groundBody = m_world.createBody(bodyDef);


    init(m_world, false);
  }

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Examples of org.jbox2d.dynamics.BodyDef

    if (bomb != null) {
      m_world.destroyBody(bomb);
      bomb = null;
    }
    // todo optimize this
    BodyDef bd = new BodyDef();
    bd.type = BodyType.DYNAMIC;
    bd.position.set(position);
    bd.bullet = true;
    bomb = m_world.createBody(bd);
    bomb.setLinearVelocity(velocity);

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Examples of org.jbox2d.dynamics.BodyDef

  public void initTest(boolean argDeserialized) {


    Body ground = null;
    {


      BodyDef bd = new BodyDef();
      bd.position.set(0.0f, 0.0f);
      ground = getWorld().createBody(bd);
      PolygonShape shape = new PolygonShape();
      shape.setAsBox(5.0f, 0.5f);
      ground.createFixture(shape, 0);


      shape.setAsBox(1.0f, 0.2f, new Vec2(0.0f, 4.0f), -0.2f);
      ground.createFixture(shape, 0);
      shape.setAsBox(1.5f, 0.2f, new Vec2(-1.2f, 5.2f), -1.5f);
      ground.createFixture(shape, 0);
      shape.setAsBox(0.5f, 50.0f, new Vec2(5.0f, 0.0f), 0.0f);
      ground.createFixture(shape, 0);






      shape.setAsBox(0.5f, 3.0f, new Vec2(-8.0f, 0.0f), 0.0f);
      ground.createFixture(shape, 0);


      shape.setAsBox(2.0f, 0.1f, new Vec2(-6.0f, -2.8f), 0.1f);
      ground.createFixture(shape, 0);


      CircleShape cd = new CircleShape();
      cd.m_radius = 0.5f;
      cd.m_p.set(-0.5f, -4.0f);
      ground.createFixture(cd, 0);


    }


    liquid = new Body[nParticles];
    float massPerParticle = totalMass / nParticles;
    // PointDef pd = new PointDef();
    // pd.mass = massPerParticle;
    // pd.restitution = 0.0f;
    // pd.filter.groupIndex = -10;
    CircleShape pd = new CircleShape();
    FixtureDef fd = new FixtureDef();
    fd.shape = pd;
    fd.density = 1f;
    fd.filter.groupIndex = -10;
    pd.m_radius = .05f;
    fd.restitution = 0.4f;
    fd.friction = 0.0f;
    float cx = 0.0f;
    float cy = 25.0f;
    for (int i = 0; i < nParticles; ++i) {
      BodyDef bd = new BodyDef();
      bd.position =
          new Vec2(MathUtils.randomFloat(cx - boxWidth * .5f, cx + boxWidth * .5f),
              MathUtils.randomFloat(cy - boxHeight * .5f, cy + boxHeight * .5f));
      bd.fixedRotation = true;
      bd.type = BodyType.DYNAMIC;
      Body b = getWorld().createBody(bd);


      b.createFixture(fd).setUserData(LIQUID_INT);


      MassData md = new MassData();
      md.mass = massPerParticle;
      md.I = 1.0f;
      b.setMassData(md);
      b.setSleepingAllowed(false);
      liquid[i] = b;
    }


    PolygonShape polyDef = new PolygonShape();
    polyDef.setAsBox(MathUtils.randomFloat(0.3f, 0.7f), MathUtils.randomFloat(0.3f, 0.7f));
    BodyDef bodyDef = new BodyDef();
    bodyDef.position = new Vec2(0.0f, 25.0f);
    bodyDef.type = BodyType.DYNAMIC;
    bod = getWorld().createBody(bodyDef);
    bod.createFixture(polyDef, 1f);
  }

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Examples of org.jbox2d.dynamics.BodyDef

        pd.m_radius = .05f;
        fd.restitution = 0.4f;
        fd.friction = 0.0f;
        float cx = 0.0f + MathUtils.randomFloat(-0.6f, 0.6f);
        float cy = 15.0f + MathUtils.randomFloat(-2.3f, 2.0f);
        BodyDef bd = new BodyDef();
        bd.position = new Vec2(cx, cy);
        bd.fixedRotation = true;
        bd.type = BodyType.DYNAMIC;
        Body b = getWorld().createBody(bd);
        b.createFixture(fd).setUserData(LIQUID_INT);
        MassData md = new MassData();
        md.mass = massPerParticle;
        md.I = 1.0f;
        b.setMassData(md);
        b.setSleepingAllowed(false);
        liquid[i] = b;
      }
    }


    if (bod.getWorldCenter().y < -15.0f) {
      getWorld().destroyBody(bod);
      PolygonShape polyDef = new PolygonShape();
      polyDef.setAsBox(MathUtils.randomFloat(0.3f, 0.7f), MathUtils.randomFloat(0.3f, 0.7f));
      BodyDef bodyDef = new BodyDef();
      bodyDef.position = new Vec2(0.0f, 25.0f);
      bodyDef.type = BodyType.DYNAMIC;
      bod = getWorld().createBody(bodyDef);
      bod.createFixture(polyDef, 1f);
    }

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Examples of org.jbox2d.dynamics.BodyDef


    final float k_restitution = 0.4f;


    Body ground;
    {
      BodyDef bd = new BodyDef();
      bd.position.set(0.0f, 20.0f);
      ground = getWorld().createBody(bd);


      EdgeShape shape = new EdgeShape();


      FixtureDef sd = new FixtureDef();
      sd.shape = shape;
      sd.density = 0.0f;
      sd.restitution = k_restitution;


      // Left vertical
      shape.set(new Vec2(-20.0f, -20.0f), new Vec2(-20.0f, 20.0f));
      ground.createFixture(sd);


      // Right vertical
      shape.set(new Vec2(20.0f, -20.0f), new Vec2(20.0f, 20.0f));
      ground.createFixture(sd);


      // Top horizontal
      shape.set(new Vec2(-20.0f, 20.0f), new Vec2(20.0f, 20.0f));
      ground.createFixture(sd);


      // Bottom horizontal
      shape.set(new Vec2(-20.0f, -20.0f), new Vec2(20.0f, -20.0f));
      ground.createFixture(sd);
    }


    {
      Transform xf1 = new Transform();
      xf1.q.set(0.3524f * MathUtils.PI);
      Rot.mulToOutUnsafe(xf1.q, new Vec2(1.0f, 0.0f), xf1.p);


      Vec2 vertices[] = new Vec2[3];
      vertices[0] = Transform.mul(xf1, new Vec2(-1.0f, 0.0f));
      vertices[1] = Transform.mul(xf1, new Vec2(1.0f, 0.0f));
      vertices[2] = Transform.mul(xf1, new Vec2(0.0f, 0.5f));


      PolygonShape poly1 = new PolygonShape();
      poly1.set(vertices, 3);


      FixtureDef sd1 = new FixtureDef();
      sd1.shape = poly1;
      sd1.density = 4.0f;


      Transform xf2 = new Transform();
      xf2.q.set(-0.3524f * MathUtils.PI);
      Rot.mulToOut(xf2.q, new Vec2(-1.0f, 0.0f), xf2.p);


      vertices[0] = Transform.mul(xf2, new Vec2(-1.0f, 0.0f));
      vertices[1] = Transform.mul(xf2, new Vec2(1.0f, 0.0f));
      vertices[2] = Transform.mul(xf2, new Vec2(0.0f, 0.5f));


      PolygonShape poly2 = new PolygonShape();
      poly2.set(vertices, 3);


      FixtureDef sd2 = new FixtureDef();
      sd2.shape = poly2;
      sd2.density = 2.0f;


      BodyDef bd = new BodyDef();
      bd.type = BodyType.DYNAMIC;
      bd.angularDamping = 5.0f;
      bd.linearDamping = 0.1f;


      bd.position.set(0.0f, 2.0f);
      bd.angle = MathUtils.PI;
      bd.allowSleep = false;
      m_body = getWorld().createBody(bd);
      m_body.createFixture(sd1);
      m_body.createFixture(sd2);
    }


    {
      PolygonShape shape = new PolygonShape();
      shape.setAsBox(0.5f, 0.5f);


      FixtureDef fd = new FixtureDef();
      fd.shape = shape;
      fd.density = 1.0f;
      fd.friction = 0.3f;


      for (int i = 0; i < 10; ++i) {
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DYNAMIC;


        bd.position.set(0.0f, 5.0f + 1.54f * i);
        Body body = getWorld().createBody(bd);

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Examples of org.jbox2d.dynamics.BodyDef

    BroadPhaseStrategy strategy = new DynamicTree();


    world = new World(new Vec2(0.0f, -10.0f), new DefaultWorldPool(100, 10), strategy);
    Body ground = null;
    {
      BodyDef bd = new BodyDef();
      ground = world.createBody(bd);


      PolygonShape shape = new PolygonShape();
      shape.setAsBox(5.0f, 100.0f);
      bd = new BodyDef();
      bd.type = BodyType.STATIC;
      FixtureDef sides = new FixtureDef();
      sides.shape = shape;
      sides.density = 0;
      sides.friction = 0;
      sides.restitution = .8f;
      sides.filter.categoryBits = 4;
      sides.filter.maskBits = 2;


      bd.position.set(-10.01f, 50.0f);
      Body bod = world.createBody(bd);
      bod.createFixture(sides);
      bd.position.set(10.01f, 50.0f);
      bod = world.createBody(bd);
      bod.createFixture(sides);
    }


    // turney
    {
      CircleShape cd;
      FixtureDef fd = new FixtureDef();
      BodyDef bd = new BodyDef();
      bd.type = BodyType.DYNAMIC;
      int numPieces = 5;
      float radius = 4f;
      bd.position = new Vec2(0.0f, 25.0f);
      Body body = world.createBody(bd);
      for (int i = 0; i < numPieces; i++) {
        cd = new CircleShape();
        cd.m_radius = .5f;
        fd.shape = cd;
        fd.density = 25;
        fd.friction = .1f;
        fd.restitution = .9f;
        float xPos = radius * (float) Math.cos(2f * Math.PI * (i / (float) (numPieces)));
        float yPos = radius * (float) Math.sin(2f * Math.PI * (i / (float) (numPieces)));
        cd.m_p.set(xPos, yPos);


        body.createFixture(fd);
      }


      RevoluteJointDef rjd = new RevoluteJointDef();
      rjd.initialize(body, ground, body.getPosition());
      rjd.motorSpeed = MathUtils.PI;
      rjd.maxMotorTorque = 1000000.0f;
      rjd.enableMotor = true;
      world.createJoint(rjd);
    }


    {
      Body prevBody = ground;


      // Define crank.
      {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 2.0f);


        BodyDef bd = new BodyDef();
        bd.type = BodyType.DYNAMIC;
        bd.position.set(0.0f, 7.0f);
        Body body = world.createBody(bd);
        body.createFixture(shape, 2.0f);


        RevoluteJointDef rjd = new RevoluteJointDef();
        rjd.initialize(prevBody, body, new Vec2(0.0f, 5.0f));
        rjd.motorSpeed = 1.0f * MathUtils.PI;
        rjd.maxMotorTorque = 20000;
        rjd.enableMotor = true;
        m_joint1 = (RevoluteJoint) world.createJoint(rjd);


        prevBody = body;
      }


      // Define follower.
      {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(0.5f, 4.0f);


        BodyDef bd = new BodyDef();
        bd.type = BodyType.DYNAMIC;
        bd.position.set(0.0f, 13.0f);
        Body body = world.createBody(bd);
        body.createFixture(shape, 2.0f);


        RevoluteJointDef rjd = new RevoluteJointDef();
        rjd.initialize(prevBody, body, new Vec2(0.0f, 9.0f));
        rjd.enableMotor = false;
        world.createJoint(rjd);


        prevBody = body;
      }


      // Define piston
      {
        PolygonShape shape = new PolygonShape();
        shape.setAsBox(7f, 2f);


        BodyDef bd = new BodyDef();
        bd.type = BodyType.DYNAMIC;
        bd.position.set(0.0f, 17.0f);
        Body body = world.createBody(bd);
        FixtureDef piston = new FixtureDef();
        piston.shape = shape;
        piston.density = 2;
        piston.filter.categoryBits = 1;
        piston.filter.maskBits = 2;
        body.createFixture(piston);


        RevoluteJointDef rjd = new RevoluteJointDef();
        rjd.initialize(prevBody, body, new Vec2(0.0f, 17.0f));
        world.createJoint(rjd);


        PrismaticJointDef pjd = new PrismaticJointDef();
        pjd.initialize(ground, body, new Vec2(0.0f, 17.0f), new Vec2(0.0f, 1.0f));


        pjd.maxMotorForce = 1000.0f;
        pjd.enableMotor = true;


        m_joint2 = (PrismaticJoint) world.createJoint(pjd);
      }


      // Create a payload
      {
        PolygonShape sd = new PolygonShape();
        BodyDef bd = new BodyDef();
        bd.type = BodyType.DYNAMIC;
        FixtureDef fixture = new FixtureDef();
        Body body;
        for (int i = 0; i < 100; ++i) {
          sd.setAsBox(0.4f, 0.3f);

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Examples of org.jbox2d.dynamics.BodyDef

  public void createWorld(Vec2 gravity, boolean warmStarting, boolean continous) {
    world = new World(gravity);
    setWarmStarting(warmStarting);
    setContinuousPhysics(continous);
    
      BodyDef bodyDef = new BodyDef();
      groundBody = world.createBody(bodyDef);
  }

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Examples of org.jbox2d.dynamics.BodyDef

    FixtureDef wallFixture = new FixtureDef();
    wallFixture.shape = wallShape;
    wallFixture.density = 1;
    wallFixture.restitution = 0;
    
    BodyDef wallBodyDef = new BodyDef();
    wallBodyDef.type = BodyType.STATIC;
    wallBodyDef.position = position;
    
    World.WORLD.createBody(wallBodyDef).createFixture(wallFixture);
  }

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