I have two points $(0,0)$ and $(93,3)$
I'm trying to work out whether a point is on or below the line segment defined by those two point.
Currently I'm using $Ax+By+C=0$ to see if a point is on or below this line segment and this works correctly except for when the point is of the form $(0,y)$ or $(x,0)$
What am I doing wrong? Do I need to use a different form of the linear equation?