private Vector2 GetArrowScreenBorderPosition(GraphicsContext graphicsContext, Vector2 entityPosition)
{
Vector2 direction = entityPosition - CCamera2D.Active.Position;
Ray2D ray = new Ray2D(graphicsContext.ScreenSize / 2f, Vector2.Normalize(direction)); // ray from screen center to the direction of the drop
if (!Check.IsValid(ray))
{
return -Vector2.One * 10000; // invalid number
}
RectangleF screenArea = new RectangleF(graphicsContext.ScreenArea).Inflate(-16);
Vector2 hitPosition;
if (ray.Intersects(screenArea.GetSideSegment(Direction2D.Left), out hitPosition) || ray.Intersects(screenArea.GetSideSegment(Direction2D.Right), out hitPosition) ||
ray.Intersects(screenArea.GetSideSegment(Direction2D.Up), out hitPosition) || ray.Intersects(screenArea.GetSideSegment(Direction2D.Down), out hitPosition))
{
return hitPosition;
}
throw new InvalidOperationException("");
}