logo
g Text Version
Beauty & Self
Books & Music
Career
Computers
Education
Family
Food & Wine
Health & Fitness
Hobbies & Crafts
Home & Garden
Money
News & Politics
Relationships
Religion & Spirituality
Sports
Travel & Culture
TV & Movies

dailyclick
Bored? Games!
Nutrition
Postcards
Take a Quiz
Rate My Photo

new
Painting
Heart Disease
Horror Literature
Dating
Hiking & Backpacking
SF/Fantasy Books
Healthy Foods


dailyclick
All times in EST

Clairvoyance: 08:00 PM

Full Schedule
g
g Flash and Animation Site

BellaOnline's Flash and Animation Editor

g

ActionScript For Loop Code and Multiple Instances of Movie Clips


In our first FlashR particle system snow scene tutorial, we learned how to use a modular function and function call written in ActionScript to animate more than one instance of the same movie clip. This was a very simple way to perform this common task in Flash. In this second tutorial, we will take a look at more programming terminology. We will discuss code loops and how they can be used to perform a task as many times as you wish.

At this point, we have our SnowScene1.fla file that contains three layers in the Timeline. The Background layer contains the background image. The next layer, called Snowflakes, contains three instances of the mcSnowflake movie clip from the Library. The top layer is the Actions layer where we have our ActionScript.

But, three snowflakes aren't enough for our snow scene. We will need many more instances of the mcSnowflake movie clip to create the appearance that it is snowing in our scene. We could continue to drag instances from the Library and manually give each a unique Instance Name in the Properties Inspector. However, there is a better and more efficient way to do this with ActionScript.

When you want your code to repeat the same task many times, you can write a code loop in ActionScript. Basically, this will be a block of code that uses an incremental counter to count the number of instances that are added to the stage. We will then tell Flash to repeat or loop this task until a certain number is reached.

First, we need to make some changes to our SnowScene1.fla Flash movie. Open the file into Flash.

  1. The first change that we need to make is to remove the three snowflakes from above the stage. Because they are on the Snowflakes layer, we can simply delete this layer. Click on the Snowflakes layer in the Timeline and then click on the Delete Layer icon.

  2. The second change will be to remove the old ActionScript from the Actions layer and Actions Panel. Click on Frame 1 in the Actions layer and then open the Actions Panel. Highlight and delete all of the code in the Actions Panel.

Now we are ready to build our new version of the snow scene. Because we removed the three snowflakes from above the stage, we no longer have any instances of our mcSnowflake movie clip on the stage. Therefore, we need to find a new way to set up the movie clip to be controlled by ActionScript. We will use Linkage to specify that the mcSnowflake symbol be exported for ActionScript at runtime. This is just a fancy way to tell Flash that this movie clip which is stored in the Library needs to be used in our movie.

  1. Go to the Library Panel and right-click on the mcSnowflake movie clip. Choose Linkage from the pop-up menu. In the Linkage Properties dialog box, click on the checkbox next to Export for ActionScript. You will see that mcSnowflake is already entered as the name for our new class. Keep the default settings and click OK. Flash will ask if you wish to create a definition for our new class. Click OK.

  2. Now we are ready to add our new ActionScript. Type the following into the Actions Panel.

    var _Snowflake:mcSnowflake;

    for (var i:Number = 0; i < 10; i++)
    {
    _Snowflake = new mcSnowflake();
    addChild(_Snowflake);
    _Snowflake.x = i * 50;
    }


Let's take a look at each line of code.

Next →




Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Twitter Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Facebook Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to MySpace Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Del.icio.us Digg ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Yahoo My Web Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Google Bookmarks Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Stumbleupon Add ActionScript+For+Loop+Code+and+Multiple+Instances+of+Movie+Clips to Reddit



 



RSS | Related Articles | Editor's Picks Articles | Top Ten Articles | Previous Features | Site Map


For FREE email updates, subscribe to the Flash and Animation Newsletter


Past Issues


print
Printer Friendly
bookmark
Bookmark
tell friend
Tell a Friend
forum
Forum
email
Email Editor


Content copyright © 2013 by Diane Cipollo. All rights reserved.
This content was written by Diane Cipollo. If you wish to use this content in any manner, you need written permission. Contact Diane Cipollo for details.

g


g features
Duplicate Background Layers in Motion 5

Ken Burns Effect In Motion - Record Keyframes

Ken Burns Effect In Motion 5 - Set Up

Archives | Site Map

forum
Forum
email
Contact

Past Issues
memberscenter


vote
Poetry
Daily
Weekly
Monthly
Less than Monthly



BellaOnline on Facebook
g


| About BellaOnline | Privacy Policy | Advertising | Become an Editor |
Website copyright © 2013 Minerva WebWorks LLC. All rights reserved.


BellaOnline Editor