title: Using dot product to determine if point lies on a plane
body: <p>Given A: a point, B: A point known to exist on a plane P, C: the normal of plane P. Can I determine if A lies on P by the result of a dot product between (A - B) and C being zero? (or within a certain level of precision, I'll probably use 0.0001f)</p>
  
  <p>I might just be missing some obvious mathematical flaw but this seems to be much simpler and faster than transforming the point to a triangle's coordinate space a.la the answer to <a href="https://stackoverflow.com/questions/9638064/check-if-a-point-is-inside-a-plane-segment/9638906#9638906">Check if a point is inside a plane segment</a></p>
  
  <p>So secondly I guess; if this is a valid check, would it be computationally faster than using matrix transformations if all I want is to see if the point is on the plane? (and not whether it lies within a polygon on said plane, I'll probably keep using matrix transforms for that)</p>