Click me if you can
Now you know how to trigger simple game actions such as rotating a cube. Since the cube is the only object in the scene, the user does not have any choice which spatial to interact with. But as soon as you have several objects in a scene, you need to find out what the user was looking at when he or she pressed an action key.
There are several possible targets of game actions: the target of navigational actions is typically the player character or vehicle—no explicit target selection is necessary. The target of a take action is, in contrast, one of many items lying around. The target of an attack can be a subset of enemy characters, while the target of a magic spell can be pretty much anything, depending on the spell: the player, ...
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