From Game Editor
double distance(double x1, double y1, double x2, double y2);
distance returns the distance between point (x1,y1) and (x2,y2).
Example:
Shoot bullets if the player comes in range.
turret -> Draw Actor -> Script Editor
if(distance(x, y, player.x, player.y)<200) { timer++; if(timer>=30) { CreateActor("bullet", "bullet", "(none)", "(none)", 0, 0, false); timer=0; } }