Mention shape casting

leitfaden.typ

@@ -111,6 +111,7 @@ However, it is much more efficient to use one or multiple simple shapes (spheres
 
 Even games that have no physics interaction can need colliders, f.e. to determine which object is selected on a mouse click.
 The task of determining what colliders a ray (a line going from a point in one direction) will intersect is called _Ray Casting_.
+When trying this for a collider, it is called _Shape Casting_.
 
 *Game engine*#h(1em)
 The game engine loads required assets on startup and then enters the main loop.