private float distanceFromALine(float pX, float pY, float lX0, float lY0, float lX1, float lY1) { Vector2 n = Vector2.Normalize(new Vector2(lX0 - lX1, lY0 - lY1)); Vector2 v = new Vector2(pX - lX0, pY - lY0); return Math.Abs(Vector2.Dot(new Vector2(-n.Y, n.X), v)); }