public static Vector2 GetDirectionalVector(Vector2 v)
{
if (v.X == 0)
{
if (v.Y > 0)
return new Vector2(0, 1);
else if (v.Y < 0)
return new Vector2(0, -1);
}
else if (v.X > 0)
{
if (v.Y == 0)
return new Vector2(1, 0);
else if (v.Y == v.X)
return new Vector2(1, 1);
}
else
{
if (v.Y == 0)
return new Vector2(-1, 0);
else if (v.Y == v.X)
return new Vector2(-1, -1);
}
return new Vector2(0, 0);
}
public Point2 Add(Vector2 dv)
{
return new Point2(X + dv.X, Y + dv.Y);
}
public Point2 Rotate90(Vector2 pivot)
{
return Add(-pivot)
.Rotate90()
.Add(pivot);
}