Using triggers for doors

Earlier, you learned how to use triggers to do something simple, such as spawning enemies to be attacked. In this section, you're going to learn how to use the same principles for doors.

1. Since we're using the first doorway we created to spawn enemies, let's create our new door in the second one. To do this, open up Prototype and select Create to add a new Cube into the world, placing it in such a way that it fits the front of the doorway we created earlier.

   Tip

   For a refresher on how Prototype works, refer to Chapter 3, Prototyping Levels with Prototype.

   

2. Now, switch to the Object mode and press the M key to specify this object as a Mover. To make it easier to tell the difference between the normal stuff and it, select the Vertex Colors option and make the object green.

   

3. Next, duplicate the object, click on the Set Trigger button, and drag it out toward both the sides of the door.

   

4. To make it easier to look at, rename the trigger to DoorTrigger and the door to Door. Then...