@Override
public void computeAABB(AABB aabb, Transform xf, int childIndex) {
final Vec2 lowerBound = aabb.lowerBound;
final Vec2 upperBound = aabb.upperBound;
final Rot xfq = xf.q;
final float v1x = (xfq.c * m_vertex1.x - xfq.s * m_vertex1.y) + xf.p.x;
final float v1y = (xfq.s * m_vertex1.x + xfq.c * m_vertex1.y) + xf.p.y;
final float v2x = (xfq.c * m_vertex2.x - xfq.s * m_vertex2.y) + xf.p.x;
final float v2y = (xfq.s * m_vertex2.x + xfq.c * m_vertex2.y) + xf.p.y;