Examples of org.jbox2d.dynamics.joints.PrismaticJointDef

org.jbox2d.dynamics.joints.PrismaticJointDef
Prismatic joint definition. This requires defining a line of motion using an axis and an anchor point. The definition uses local anchor points and a local axis so that the initial configuration can violate the constraint slightly. The joint translation is zero when the local anchor points coincide in world space. Using local anchors and a local axis helps when saving and loading a game. @warning at least one body should by dynamic with a non-fixed rotation. @author Daniel


        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);

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        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);

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      bd.angle = 0.5f * MathUtils.PI;
      bd.allowSleep = false;
      Body body = getWorld().createBody(bd);
      body.createFixture(shape, 5.0f);


      PrismaticJointDef pjd = new PrismaticJointDef();


      // Bouncy limit
      Vec2 axis = new Vec2(2.0f, 1.0f);
      axis.normalize();
      pjd.initialize(ground, body, new Vec2(0.0f, 0.0f), axis);


      // Non-bouncy limit
      // pjd.Initialize(ground, body, Vec2(-10.0f, 10.0f), Vec2(1.0f, 0.0f));


      pjd.motorSpeed = 10.0f;

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      PolygonShape p = new PolygonShape();
      p.setAsBox(0.5f, 1.0f);
      body.createFixture(p, 1.0f);


      PrismaticJointDef jd = new PrismaticJointDef();
      jd.bodyA = body2;
      jd.bodyB = body;
      jd.enableLimit = true;
      jd.localAnchorA.set(0.0f, 4.0f);
      jd.localAnchorB.setZero();

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


        m_joint2 = (PrismaticJoint) getWorld().createJoint(pjd);

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      Map<Integer, Joint> jointMap) {
    JointDef jd = null;


    switch (joint.getType()) {
      case PRISMATIC: {
        PrismaticJointDef def = new PrismaticJointDef();
        jd = def;
        def.enableLimit = joint.getEnableLimit();
        def.enableMotor = joint.getEnableMotor();
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.localAxisA.set(pbToVec(joint.getLocalAxisA()));
        def.lowerTranslation = joint.getLowerLimit();
        def.maxMotorForce = joint.getMaxMotorForce();
        def.motorSpeed = joint.getMotorSpeed();
        def.referenceAngle = joint.getRefAngle();
        def.upperTranslation = joint.getUpperLimit();
        break;
      }
      case REVOLUTE: {
        RevoluteJointDef def = new RevoluteJointDef();
        jd = def;
        def.enableLimit = joint.getEnableLimit();
        def.enableMotor = joint.getEnableMotor();
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.lowerAngle = joint.getLowerLimit();
        def.maxMotorTorque = joint.getMaxMotorTorque();
        def.motorSpeed = joint.getMotorSpeed();
        def.referenceAngle = joint.getRefAngle();
        def.upperAngle = joint.getUpperLimit();
        break;
      }
      case DISTANCE: {
        DistanceJointDef def = new DistanceJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.dampingRatio = joint.getDampingRatio();
        def.frequencyHz = joint.getFrequency();
        def.length = joint.getLength();
        break;
      }
      case PULLEY: {
        PulleyJointDef def = new PulleyJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.groundAnchorA.set(pbToVec(joint.getGroundAnchorA()));
        def.groundAnchorB.set(pbToVec(joint.getGroundAnchorB()));
        def.lengthA = joint.getLengthA();
        def.lengthB = joint.getLengthB();
        def.ratio = joint.getRatio();
        break;
      }
      case MOUSE: {
        MouseJointDef def = new MouseJointDef();
        jd = def;
        def.dampingRatio = joint.getDampingRatio();
        def.frequencyHz = joint.getFrequency();
        def.maxForce = joint.getMaxForce();
        def.target.set(pbToVec(joint.getTarget()));
        break;
      }
      case GEAR: {
        GearJointDef def = new GearJointDef();
        jd = def;
        if (!jointMap.containsKey(joint.getJoint1())) {
          throw new IllegalArgumentException("Index " + joint.getJoint1()
              + " is not present in the joint map.");
        }
        def.joint1 = jointMap.get(joint.getJoint1());
        if (!jointMap.containsKey(joint.getJoint2())) {
          throw new IllegalArgumentException("Index " + joint.getJoint2()
              + " is not present in the joint map.");
        }
        def.joint2 = jointMap.get(joint.getJoint2());
        def.ratio = joint.getRatio();
        break;
      }
      case WHEEL: {
        WheelJointDef def = new WheelJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.localAxisA.set(pbToVec(joint.getLocalAxisA()));
        def.enableMotor = joint.getEnableMotor();
        def.maxMotorTorque = joint.getMaxMotorTorque();
        def.motorSpeed = joint.getMotorSpeed();
        def.frequencyHz = joint.getFrequency();
        def.dampingRatio = joint.getDampingRatio();
        break;
      }
      case WELD: {
        WeldJointDef def = new WeldJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.referenceAngle = joint.getRefAngle();
        def.frequencyHz = joint.getFrequency();
        def.dampingRatio = joint.getDampingRatio();
        break;
      }
      case FRICTION: {
        FrictionJointDef def = new FrictionJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.maxForce = joint.getMaxForce();
        def.maxTorque = joint.getMaxTorque();
        break;
      }
      case ROPE: {
        RopeJointDef def = new RopeJointDef();
        jd = def;
        def.localAnchorA.set(pbToVec(joint.getLocalAnchorA()));
        def.localAnchorB.set(pbToVec(joint.getLocalAnchorB()));
        def.maxLength = joint.getMaxLength();
        return null;
      }
      case CONSTANT_VOLUME: {
        ConstantVolumeJointDef def = new ConstantVolumeJointDef();
        jd = def;
        def.dampingRatio = joint.getDampingRatio();
        def.frequencyHz = joint.getFrequency();
        if (joint.getBodiesCount() != joint.getJointsCount()) {
          throw new IllegalArgumentException(
              "Constant volume joint must have bodies and joints defined");
        }
        for (int i = 0; i < joint.getBodiesCount(); i++) {
          int body = joint.getBodies(i);
          if (!argBodyMap.containsKey(body)) {
            throw new IllegalArgumentException("Index " + body + " is not present in the body map");
          }
          int jointIndex = joint.getJoints(i);
          if (!jointMap.containsKey(jointIndex)) {
            throw new IllegalArgumentException("Index " + jointIndex
                + " is not present in the joint map");
          }
          Joint djoint = jointMap.get(jointIndex);
          if (!(djoint instanceof DistanceJoint)) {
            throw new IllegalArgumentException(
                "Joints for constant volume joint must be distance joints");
          }
          def.addBodyAndJoint(argBodyMap.get(body), (DistanceJoint) djoint);
        }
        break;
      }
      case LINE: {
        UnsupportedObjectException e =

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      rjd.initialize(m_attachment, m_platform, new Vec2(0.0f, 5.0f));
      rjd.maxMotorTorque = 50.0f;
      rjd.enableMotor = true;
      getWorld().createJoint(rjd);


      PrismaticJointDef pjd = new PrismaticJointDef();
      pjd.initialize(ground, m_platform, new Vec2(0.0f, 5.0f), new Vec2(1.0f, 0.0f));


      pjd.maxMotorForce = 1000.0f;
      pjd.enableMotor = true;
      pjd.lowerTranslation = -10.0f;
      pjd.upperTranslation = 10.0f;

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


        getWorld().createJoint(pjd);

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      bd3.type = BodyType.DYNAMIC;
      bd3.position.set(2.5f, 12.0f);
      Body body3 = m_world.createBody(bd3);
      body3.createFixture(box, 5.0f);


      PrismaticJointDef jd3 = new PrismaticJointDef();
      jd3.initialize(ground, body3, bd3.position, new Vec2(0.0f, 1.0f));
      jd3.lowerTranslation = -5.0f;
      jd3.upperTranslation = 5.0f;
      jd3.enableLimit = true;


      m_joint3 = (PrismaticJoint) m_world.createJoint(jd3);

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Related Classes of org.jbox2d.dynamics.joints.PrismaticJointDef

org.jbox2d.common.Vec2

org.jbox2d.profile.PistonBenchmark

org.jbox2d.profile.worlds.PistonWorld

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org.jbox2d.testbed.tests.BodyTypes

org.jbox2d.testbed.tests.CollisionFiltering

org.jbox2d.testbed.tests.Gears

org.jbox2d.testbed.tests.PistonTest

org.jbox2d.testbed.tests.PrismaticTest

org.jbox2d.testbed.tests.SliderCrankTest

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