/** Returns the distance from this vector to (px,py) */
public float dist(float px, float py) {
float dx = x - px;
float dy = y - py;
return (float) Math.sqrt(dx * dx + dy * dy);
}
/** Returns the distance from this vector to b */
public float dist(Vec2 b) {
float dx = x - b.x;
float dy = y - b.y;
return (float) Math.sqrt(dx * dx + dy * dy);
}