Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Creating the three game states

From: Building Flash Games with Starling

Video: Creating the three game states

So now that we have our IState interface created, we can go ahead and create those three Game states: the Menu state, the Play state and the Game Over state. So I'm going to right-click on our source folder and choose New > ActionScript Class, and for a Package we are going to store these state classes in a package called states. And the first one I'm going to create is the Menu state. Now for a superclass this is going to subclass starling.display.Sprite, because it's going to contain the actual visual representation for the state.

Creating the three game states

So now that we have our IState interface created, we can go ahead and create those three Game states: the Menu state, the Play state and the Game Over state. So I'm going to right-click on our source folder and choose New > ActionScript Class, and for a Package we are going to store these state classes in a package called states. And the first one I'm going to create is the Menu state. Now for a superclass this is going to subclass starling.display.Sprite, because it's going to contain the actual visual representation for the state.

And for interfaces we are going to Add that IState interface, so if we actually just search for it here we can see the IState interface, click OK, and now we can click Finish. And you could see automatically by implementing that interface it's now created the update and destroy methods for us. So we are going to make a couple of changes to this. The first thing we are going to do is when we create one of these states from our Game class, we are actually going to send in a reference to our main Game class so that we can communicate back to it.

So in the constructor here, I'm going to put an argument called game, and this is going to be of type Game. And now inside of our constructor we are going to create an instance property called game, so I'm going to say this.game = game; and now I can hit Command+1 or Ctrl+1 to get a quick fix to create that as an instance variable at the top. So now anywhere inside of this state I can actually call back to our main Game class. Now the next thing I'm going to do is to add an event listener for the added to stage event, again because we don't want to do anything here until we know it's been added to the stage.

So I'm going say addEventListener and again be sure when you are importing event that you are importing starling.events.Event. We are going to listen for ADDED_TO_ STAGE and we are going to have it call a function called init. And let's go ahead and define that function now. So private function init, we are going to have our event object be of type starling.events.Event. I'm not going to return anything and now we have that set up. So this is going to be main template that each of our states is going to implement.

So what I'm going to do is copy this entire class to the clipboard, and now I'm going to right-click in the states package and we are going to create the other two states. So New > ActionScript Class, and this one is going to be called Play, and again, the Superclass is going to be starling.display.Sprite. For interfaces we are going to implement that IState interface and click Finish. Now I'm just simply going to select all of text in here and paste in that Menu state, because now all we need to do is to simply change Menu to Play here and there, and now we have our Play state created.

So now we are going to do the same thing for the Game Over state. So New > ActionScript Class, this one is called GameOver, Superclass is going to be Sprite. We are going to implement the IState interface, click Finish, and again, replace the text with the text that's on the clipboard, change this to GameOver and GameOver like that. So now you can see we have our states package and we have our three states created.

So now in the next movie we are going to look at implementing a state machine which is going to control the switching of the various states of our game.

Show transcript

This video is part of

Image for Building Flash Games with Starling
Building Flash Games with Starling

46 video lessons · 9419 viewers

Lee Brimelow
Author

 
Expand all | Collapse all
  1. 2m 9s
    1. Welcome
      45s
    2. Using the exercise files
      36s
    3. What you should know
      48s
  2. 10m 21s
    1. Checking out the finished product
      1m 10s
    2. Downloading the Starling framework
      4m 13s
    3. Installing Flash Builder
      1m 44s
    4. Installing additional tools
      1m 30s
    5. Overview of the Starling framework
      1m 44s
  3. 13m 0s
    1. Creating the Flash Builder project
      2m 40s
    2. Setting up your Starling scene
      6m 7s
    3. Creating the main game class
      4m 13s
  4. 13m 52s
    1. Creating the IState interface
      2m 14s
    2. Creating the three game states
      3m 50s
    3. Building the state machine
      7m 48s
  5. 22m 14s
    1. Creating a static assets class
      2m 3s
    2. Adding images and creating textures
      3m 24s
    3. Creating sprite sheets with TexturePacker
      6m 26s
    4. Creating the main texture atlas
      3m 29s
    5. Creating and importing bitmap fonts
      6m 52s
  6. 14m 16s
    1. Creating the Background class
      5m 55s
    2. Adding the logo
      2m 58s
    3. Adding the play button
      3m 4s
    4. Implementing the destroy method
      2m 19s
  7. 56m 47s
    1. Adding the background
      1m 3s
    2. Creating the Hero class
      6m 14s
    3. Creating the Bullet class
      1m 44s
    4. Creating the BulletManager class
      4m 23s
    5. Using the StarlingPool class
      9m 24s
    6. Firing bullets with the mouse
      7m 24s
    7. Creating the Alien movie clip
      1m 58s
    8. Creating the AlienManager class
      8m 12s
    9. Overview of collision-detection options
      3m 10s
    10. Creating the CollisionManager class
      10m 51s
    11. Implementing the destroy method
      2m 24s
  8. 7m 59s
    1. Adding the background
      1m 10s
    2. Creating the "Game Over" text
      2m 43s
    3. Adding the Try Again button
      4m 6s
  9. 20m 5s
    1. Exploring particle-creation tools
      4m 52s
    2. Adding the smoke texture
      5m 3s
    3. Creating the Explosion class
      2m 6s
    4. Creating the ExplosionManager class
      8m 4s
  10. 11m 5s
    1. Creating sound effects with cfxr
      3m 5s
    2. Adding the sound effects
      3m 42s
    3. Creating the Score class
      4m 18s
  11. 6m 1s
    1. Starling optimization tips
      4m 8s
    2. Helpful Starling resources
      1m 53s

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Building Flash Games with Starling.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.