Examples of org.jbox2d.collision.shapes.Shape

org.jbox2d.collision.shapes.Shape
A shape is used for collision detection. You can create a shape however you like. Shapes used for simulation in World are created automatically when a Fixture is created. Shapes may encapsulate a one or more child shapes.

            Vec2 center = body.getPosition();
            context.save();
            context.translate(center.x, center.y);
            context.rotate(body.getAngle());
            for (Fixture fixture = body.getFixtureList(); fixture != null; fixture = fixture.getNext()) {
                Shape shape = fixture.getShape();
                if (shape.getType() == ShapeType.CIRCLE) {
                    CircleShape circle = (CircleShape)shape;
                    context.beginPath();
                    context.arc(circle.m_p.x, circle.m_p.y, circle.getRadius(), 0, Math.PI * 2, true);
                    context.closePath();
                    context.stroke();
                } else if (shape.getType() == ShapeType.POLYGON) {
                    PolygonShape poly = (PolygonShape)shape;
                    Vec2[] vertices = poly.getVertices();
                    context.beginPath();
                    context.moveTo(vertices[0].x, vertices[0].y);
                    for (int i = 1; i < poly.getVertexCount(); ++i) {

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    if (groupDef.shape != null) {
      final ParticleDef particleDef = tempParticleDef;
      particleDef.flags = groupDef.flags;
      particleDef.color = groupDef.color;
      particleDef.userData = groupDef.userData;
      Shape shape = groupDef.shape;
      transform.set(groupDef.position, groupDef.angle);
      AABB aabb = temp;
      int childCount = shape.getChildCount();
      for (int childIndex = 0; childIndex < childCount; childIndex++) {
        if (childIndex == 0) {
          shape.computeAABB(aabb, identity, childIndex);
        } else {
          AABB childAABB = temp2;
          shape.computeAABB(childAABB, identity, childIndex);
          aabb.combine(childAABB);
        }
      }
      final float upperBoundY = aabb.upperBound.y;
      final float upperBoundX = aabb.upperBound.x;
      for (float y = MathUtils.floor(aabb.lowerBound.y / stride) * stride; y < upperBoundY; y +=
          stride) {
        for (float x = MathUtils.floor(aabb.lowerBound.x / stride) * stride; x < upperBoundX; x +=
            stride) {
          Vec2 p = tempVec;
          p.x = x;
          p.y = y;
          if (shape.testPoint(identity, p)) {
            Transform.mulToOut(transform, p, p);
            particleDef.position.x = p.x;
            particleDef.position.y = p.y;
            p.subLocal(groupDef.position);
            Vec2.crossToOutUnsafe(groupDef.angularVelocity, p, particleDef.velocity);

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    @Override
    public boolean reportFixture(Fixture fixture) {
      if (fixture.isSensor()) {
        return true;
      }
      final Shape shape = fixture.getShape();
      Body b = fixture.getBody();
      Vec2 bp = b.getWorldCenter();
      float bm = b.getMass();
      float bI = b.getInertia() - bm * b.getLocalCenter().lengthSquared();
      float invBm = bm > 0 ? 1 / bm : 0;
      float invBI = bI > 0 ? 1 / bI : 0;
      int childCount = shape.getChildCount();
      for (int childIndex = 0; childIndex < childCount; childIndex++) {
        AABB aabb = fixture.getAABB(childIndex);
        final float aabblowerBoundx = aabb.lowerBound.x - system.m_particleDiameter;
        final float aabblowerBoundy = aabb.lowerBound.y - system.m_particleDiameter;
        final float aabbupperBoundx = aabb.upperBound.x + system.m_particleDiameter;

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    @Override
    public boolean reportFixture(Fixture fixture) {
      if (fixture.isSensor()) {
        return true;
      }
      final Shape shape = fixture.getShape();
      Body body = fixture.getBody();
      int childCount = shape.getChildCount();
      for (int childIndex = 0; childIndex < childCount; childIndex++) {
        AABB aabb = fixture.getAABB(childIndex);
        final float aabblowerBoundx = aabb.lowerBound.x - system.m_particleDiameter;
        final float aabblowerBoundy = aabb.lowerBound.y - system.m_particleDiameter;
        final float aabbupperBoundx = aabb.upperBound.x + system.m_particleDiameter;

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   * Get the world manifold.
   */
  public void getWorldManifold(WorldManifold worldManifold) {
    final Body bodyA = m_fixtureA.getBody();
    final Body bodyB = m_fixtureB.getBody();
    final Shape shapeA = m_fixtureA.getShape();
    final Shape shapeB = m_fixtureB.getShape();


    worldManifold.initialize(m_manifold, bodyA.getTransform(),
        shapeA.m_radius, bodyB.getTransform(), shapeB.m_radius);
  }

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    Transform xfB = bodyB.getTransform();
    //log.debug("TransformA: "+xfA);
    //log.debug("TransformB: "+xfB);
    
    if (sensor) {
      Shape shapeA = m_fixtureA.getShape();
      Shape shapeB = m_fixtureB.getShape();
      touching = pool.getCollision().testOverlap(shapeA, shapeB,
          xfA, xfB);


      // Sensors don't generate manifolds.
      m_manifold.pointCount = 0;

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    for (int i = 0; i < m_constraintCount; ++i){
      final Contact contact = contacts[i];


      final Fixture fixtureA = contact.m_fixtureA;
      final Fixture fixtureB = contact.m_fixtureB;
      final Shape shapeA = fixtureA.getShape();
      final Shape shapeB = fixtureB.getShape();
      final float radiusA = shapeA.m_radius;
      final float radiusB = shapeB.m_radius;
      final Body bodyA = fixtureA.getBody();
      final Body bodyB = fixtureB.getBody();
      final Manifold manifold = contact.getManifold();

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    for(int i=0; i<m_count; i++){
      Contact contact = contacts[i];
      
      Fixture fixtureA = contact.getFixtureA();
      Fixture fixtureB = contact.getFixtureB();
      Shape shapeA = fixtureA.getShape();
      Shape shapeB = fixtureB.getShape();
      float radiusA = shapeA.m_radius;
      float radiusB = shapeB.m_radius;
      Body bodyA = fixtureA.getBody();
      Body bodyB = fixtureB.getBody();
      Manifold manifold = contact.getManifold();

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      // System.out.println("contacts: " + m_count);
      final Contact contact = m_contacts[i];


      final Fixture fixtureA = contact.m_fixtureA;
      final Fixture fixtureB = contact.m_fixtureB;
      final Shape shapeA = fixtureA.getShape();
      final Shape shapeB = fixtureB.getShape();
      final float radiusA = shapeA.m_radius;
      final float radiusB = shapeB.m_radius;
      final Body bodyA = fixtureA.getBody();
      final Body bodyB = fixtureB.getBody();
      final Manifold manifold = contact.getManifold();

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  /** Get the world manifold. */
  public void getWorldManifold (WorldManifold worldManifold) {
    final Body bodyA = m_fixtureA.getBody();
    final Body bodyB = m_fixtureB.getBody();
    final Shape shapeA = m_fixtureA.getShape();
    final Shape shapeB = m_fixtureB.getShape();


    worldManifold.initialize(m_manifold, bodyA.getTransform(), shapeA.m_radius, bodyB.getTransform(), shapeB.m_radius);
  }

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Related Classes of org.jbox2d.collision.shapes.Shape

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advanced.physics.util.PhysicsHelper

org.jbox2d.dynamics.contacts.Contact

org.jbox2d.dynamics.contacts.ContactSolver

org.jbox2d.dynamics.contacts.TOISolver

org.jbox2d.particle.ParticleSystem

org.jbox2d.particle.ParticleSystem$SolveCollisionCallback

org.jbox2d.particle.ParticleSystem$UpdateBodyContactsCallback

org.jbox2d.serialization.pb.PbDeserializer

org.jbox2d.testbed.tests.FixedPendulumTest

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