question: public static int numPixelsBetween ( int x1 , int y1 , int x2 , int y2 ) { return ( int ) Math . sqrt ( Math . pow ( ( double ) ( x1 - x2 ) , 2.0 ) + Math . pow ( ( double ) ( y1 - y2 ) , 2.0 ) ) ; }
target:  Little math utility that both tools use, that just implements the pythagorean theorem to do the number of pixels between two screen points.