Enemies are computationally expensive to have spawned throughout the entire game project. A little trick that we use as game developers is spawning enemies right before a player enters an area; this way, they don't need to be created until they're ready to be seen! We can to this through the use of a property called a trigger.
Let's first open the level that we created in Chapter 3, Prototyping Levels with Prototype that we used earlier in this chapter. We will need to add in navigation data to make things easier to work with. Create an empty game object by navigating to GameObject | Create Empty and set Position as
0,0,0. Then, call the gameEnvironment.Once we have the object created, drag and drop all our cubes and rooms into it as children. After this, click on the Static button to ensure that the objects don't move by selecting Yes, change children. This is an optional step as RAIN can still make a NavMesh without this, but it's a way for...