Determines whether two points are either side of this moving entity. If they are then they cannot 'see' each other. @param x0 x position of first point of interest @param y0 y position of first point of interest @param x1 x position of second point of interest @param y1 y position of second point o
(double x0, double y0, double x1, double y1)
source not stored for this graph (policy: none)