isClose is used as an optimization pass. This method is used to check whether or not
it's even necessary to perform more mathematically intense checks like
#checkIfInside(double,double,double,Point3D,Vector3D)or
us.ihmc.jMonkeyEngineToolkit.HeightMapWithNormals#heightAt(double,double,double).
As such, isClose should always be a very fast check, and when complexity of implementation is under
consideration one can always deem it acceptable to do a very efficient implementation that returns
a false positive instead of a slower implementation that is more precise.