/*
  * (non-Javadoc)
  *
  * @see java.lang.Object#hashCode()
  */
 @Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + getOuterType().hashCode();
   result = prime * result + ((mDistance == null) ? 0 : mDistance.hashCode());
   result = prime * result + ((mHitRay == null) ? 0 : mHitRay.hashCode());
   result = prime * result + ((mIntersection == null) ? 0 : mIntersection.hashCode());
   return result;
 }