Game Engine Events

Introductions

Introduce yourselves!

Icebreaker: What's your favorite Mobile game?

Groupwork

Games are inherently event-driven

An event is anything that happens that a game object may need to take note of.

1. What are some examples of game engine events?

Generally, a game engine must:

A. Notify interested game objects B. Arrange for those game objects to respond

This is called event handling.

2. Consider handling "explosion" events in the below code.

    void Explosion::Update()
     ...
      if (explosion_went_off) then

        // Get list of all objects in range.
        std::vector<Object *> list = getObjectsInRange(radius)

        // Have them each react to explosion.
        std::vector<Object *>::iterator it;
        for (it = list.begin(); it != list.end(); it++)
          
          li.currentObject() -> onExplosion()

        end for
        ...

      end if

• What type of binding is the call to onExplosion() known as?
• What are it's properties?

3. What’s the problem with using the binding in #2 for a general purpose game engine?

Hand-in

Submit your answers:

http://wpi.qualtrics.com/jfe/form/SV_2gH6nVmq8F85jH7

Make sure to include the names of all group members.

Happy event-ing!

-- Mark