public static void DrawArrowPointingAt(Rect rect)
{
Vector2 v = new Vector2(UI.screenWidth, UI.screenHeight) / 2f;
float angle = Mathf.Atan2(rect.center.x - v.x, v.y - rect.center.y) * 57.29578f;
Vector2 vector = new Bounds(rect.center, rect.size).ClosestPoint(v);
Rect position = new Rect(vector + Vector2.left * ArrowTex.width * 0.5f, new Vector2(ArrowTex.width, ArrowTex.height));
Matrix4x4 matrix = GUI.matrix;
GUI.matrix = Matrix4x4.identity;
Vector2 center = GUIUtility.GUIToScreenPoint(vector);
GUI.matrix = matrix;
UI.RotateAroundPivot(angle, center);
GUI.DrawTexture(position, ArrowTex);
GUI.matrix = matrix;
}
