# File utilities/Geometry.rb, line 20
def LineSideTest(p0,p1,p2)
  #perhaps make safe later
  #plug in to robust 2d predicates
  return (((p1[0]-p0[0])*(p2[1]-p0[1])) - ((p2[0]-p0[0])*(p1[1]-p0[1])))
end