code: public boolean isEquivalent(CrystalTransform other) {
  		Matrix4d mul = new Matrix4d();
  		mul.mul(this.matTransform,other.matTransform);
  
  		if (mul.epsilonEquals(IDENTITY, 0.0001)) {
  			return true;
  		}
  		return false;
  	}
docs: Returns true if the given CrystalTransform is equivalent to this one.
  Two crystal transforms are equivalent if one is the inverse of the other, i.e.
  their transformation matrices multiplication is equal to the identity.
  @param other
  @return