About customEventExample

Learning Objectives

This example demonstrates a simple game. A GameEvent class is used to store the bullet and bug that just collided.

After studying this example, you'll understand how to create an object to generate custom events using a class based on ofEventArgs

In the code, pay attention to:

• OF classes and functions to create custom events:
• ofEventArgs, base class for events that don't send any arguments like draw or update
• ofAddListener to add a listener method to GameEvent
• ofNotifyEvent() to notify the GameEvent

Expected Behavior

When launching this app, you should see a screen with

• nine small randomly positioned black circles. Bugs crawl out of the circles and move around the stage.
• a canon pointing upwards at the bottom center of the window rotating on it's bottom vertical axis, its angle mapped to the horizontal mouse position.
• when pressing on the spacebar, the canon shoots a pink bullet. If a bullet hits a bug, the bug disappears.
• a text overlay at the top left corner displays the number of bullets shot and bugs killed.
• A message in the console: "Game Event: BUG HIT" when bullet and bug collide.

Instructions for use:

• Move the mouse on it's horizontal axis to aim canon. Press spacebar to shoot bullets at bugs.

Other classes used in this file

• GameEvent
• Bullet
• Bug