How to use

ContactID

in

org.jbox2d.collision

/**
 * Creates a manifold point as a copy of the given point
 * @param cp point to copy from
 */
public ManifoldPoint(final ManifoldPoint cp) {
  localPoint = cp.localPoint.clone();
  normalImpulse = cp.normalImpulse;
  tangentImpulse = cp.tangentImpulse;
  id = new ContactID(cp.id);
}

 @Override
 public int compareTo(ContactID o) {
  return getKey() - o.getKey();
 }
}

if (manifold2.points[j].id.isEqual(id)) {
 state1[i] = PointState.PERSIST_STATE;
 break;
if (manifold1.points[j].id.isEqual(id)) {
 state2[i] = PointState.PERSIST_STATE;
 break;

public ContactID(final ContactID c) {
 set(c);
}

out.x = (xf2.q.c * px + xf2.q.s * py);
out.y = (-xf2.q.s * px + xf2.q.c * py);
cp.id.set(clipPoints2[i].id);
if (flip) {
 cp.id.flip();

manifold.points[0].id.zero();

  /**
   * Sets this manifold point form the given one
   * @param cp the point to copy from
   */
  public void set(final ManifoldPoint cp){
    localPoint.set(cp.localPoint);
    normalImpulse = cp.normalImpulse;
    tangentImpulse = cp.tangentImpulse;
    id.set(cp.id);
  }
}

out.x = (xf2.q.c * px + xf2.q.s * py);
out.y = (-xf2.q.s * px + xf2.q.c * py);
cp.id.set(clipPoints2[i].id);
if (flip) {
 cp.id.flip();

 mpoint.localPoint.x = circlep.x;
 mpoint.localPoint.y = circlep.y;
 mpoint.id.zero();
 manifold.localPoint.set(v1);
 manifold.points[0].localPoint.set(circlep);
 manifold.points[0].id.zero();
} else if (u2 <= 0.0f) {
 manifold.localPoint.set(v2);
 manifold.points[0].localPoint.set(circlep);
 manifold.points[0].id.zero();
} else {
 manifold.points[0].id.zero();

public ContactID(final ContactID c) {
 set(c);
}

out.x = (xf2.q.c * px + xf2.q.s * py);
out.y = (-xf2.q.s * px + xf2.q.c * py);
cp.id.set(clipPoints2[i].id);
if (flip) {
 cp.id.flip();

/**
 * Blank manifold point with everything zeroed out.
 */
public ManifoldPoint() {
  localPoint = new Vec2();
  normalImpulse = tangentImpulse = 0f;
  id = new ContactID();
}

public boolean isEqual(final ContactID cid) {
 return getKey() == cid.getKey();
}

if (manifold2.points[j].id.isEqual(id)) {
 state1[i] = PointState.PERSIST_STATE;
 break;
if (manifold1.points[j].id.isEqual(id)) {
 state2[i] = PointState.PERSIST_STATE;
 break;

manifold.points[0].id.zero();

  /**
   * Sets this manifold point form the given one
   * @param cp the point to copy from
   */
  public void set(final ManifoldPoint cp){
    localPoint.set(cp.localPoint);
    normalImpulse = cp.normalImpulse;
    tangentImpulse = cp.tangentImpulse;
    id.set(cp.id);
  }
}

out.x = (xf2.q.c * px + xf2.q.s * py);
out.y = (-xf2.q.s * px + xf2.q.c * py);
cp.id.set(clipPoints2[i].id);
if (flip) {
 cp.id.flip();

public ClipVertex() {
 v = new Vec2();
 id = new ContactID();
}

public ManifoldPoint[] getPoints () {
  for (int i = 0; i < manifold.points.length; i++) {
    points[i].contactID = manifold.points[i].id.getKey();
    points[i].localPoint.set(manifold.points[i].localPoint.x, manifold.points[i].localPoint.y);
    points[i].normalImpulse = manifold.points[i].normalImpulse;
    points[i].tangentImpulse = manifold.points[i].tangentImpulse;
  }
  return points;
}

ManifoldPoint mp1 = oldManifold.points[j];
if (mp1.id.isEqual(id2)) {
 mp2.normalImpulse = mp1.normalImpulse;
 mp2.tangentImpulse = mp1.tangentImpulse;