Summary

In this chapter, we have explored two key methods for detecting interactions between objects in 3D games. Both ray casting and collision detection have many individual uses, and they are key skills that you should expect to reuse in your future use of Unity.

In the next chapter, we'll look into another method of collision detection while using colliders of objects set to trigger mode. This mode allows collision detection but removes the physical presence of an object, allowing — for example — the collection of objects without the player bumping into them. Try to think of triggers as collisions with no impact. While we could have taken this approach with the outpost door, it is important to learn the core concept of collision detection first, which is why we are learning in this particular order.

We will create a collection game in which the player must find four batteries in order to recharge the lock on the outpost door, and not allow entry to the outpost unless these batteries have...