A Flash Developer Resource Site














Internet Commerce

Partners & Affiliates














Developer Channel

internet.com


Featured Flash FLA
Gallery Downloads 11337 Flash Movies | 1 New Flash Movies Added
What's New | Top 100

Featured FLA

» Author: Bugra Ozden
» Title: Skatalog v9 - product catalog
» Description: Create your product catalog easly and publish on your website or Create your image gallery, documents list, portfolio. Fully XML Driven
» More by Bugra Ozden


Random FLAs | Add Flash Movie
Featured Flash Site
Gallery Downloads 5828 Flash Sites | 0 New Flash Links
What's New | Top 100 Flash Site

Featured Site

» Posted in the Flash Kit Links section
» Title: Creative DW Image Show PRO
» Description: Creative DW Image Show PRO is a Dreamweaver extension which enables the user to create multimedia presentations. It combines the features of the popular Creative DW Image Show with the ability to add professional text effects to slides (similar to After Effects). The product is very customizable: the user can choose the duration of the transition effects, the slide motion start and end position, zoom and panning type for both images and texts.


Random Links | Add your own Flash Related Links
Flash Tutorials 1280 Tutorials 7 New Tutorials Added!
What's New | Top100

» Make a Flash Slide Show Screen Saver
» Simple flash making tutorial for thanksgiving
» Create flash banner for website
» Create xml slideshow with free template
» How to Insert a Multilingual Subtitle Into Your Flash Video Studio
» How to Create Cool Halloween Slideshow
» Debugging flash using the Firebug console
» Create Flash Slideshow on Blogger
» FLASH TRICKS IN WEB ADVERTISING: FLASH BANNERS
» Unknown Tag: Title10
Random Tutorial | Add Site

Trading Customer Accounting (IL)
Next Step Systems
US-IL-Chicago

Justtechjobs.com Post A Job | Post A Resume


Tutorials Home What's New Top Rated Submit myTutes Random!

Search Tutorials


Tutorials Tutorials » Games

Categories Programming Starfields for Realistic 3D Space Flight
Author: Ian Rose

 
Page 3
«prev 1 2 3 4 5 6 next»

The Coding

There are a few important pieces of ActionScript that help in making this a fairly realistic space flight simulation. For the sake of not getting confused, we'll deal with each object to be scripted seperately. There are four objects which need ActionScript added to them. These are "player1", "planet1", "starfield1", and "bigstars1". First, let's deal with player1, the target that will sit in the center of the viewscreen. To center the target, enter the following code in the player1 instance's Action box:
 onClipEvent(load)
 {
 this._x = 250;
 this._y = 200;
 planetSpeed=(.02 * _root.planet1._width);
 starSpeed=(.001 * _root.planet1._width);
 bigstarSpeed=(.003 * _root.planet1._width);
 }
 onClipEvent (enterFrame)
 {
 if (Key.isDown(Key.RIGHT))
 {
 _root.planet1._x -= planetSpeed;
 _root.starfield1._x -= starSpeed;
 _root.bigstars1._x -= bigstarSpeed;
 }
 else if (Key.isDown(Key.LEFT))
 {
 _root.planet1._x += planetSpeed;
 _root.starfield1._x += starSpeed;
 _root.bigstars1._x += bigstarSpeed;
 }
 if (Key.isDown(Key.DOWN))
 {
 _root.planet1._y -= planetSpeed;
 _root.starfield1._y -= starSpeed;
 _root.bigstars1._y -= bigstarSpeed;
 }
 else if (Key.isDown(Key.UP))
 {
 _root.planet1._y += planetSpeed;
 _root.starfield1._y += starSpeed;
 _root.bigstars1._y += bigstarSpeed;
 }
}
Most of this code is pretty straight-forward, but it's worth going over. First, in the (load) section at the top of the script, we center the object at the coordinates 250,200 and introduce our three speed variables: planetSpeed is the rate at which the planet object seems to move relative to the player. starSpeed sets how quickly the smaller stars appear to move, and bigstarSpeed sets that speed for the big stars. As you can see, all three of these variables depend ultimately on the _width property of the planet1 object. In other words, as the planet object grows (or seems to get closer), the other objects' movements are affected, just as if they were actually getting closer to the player in a space environment. After the (load) section is (enterFrame), which updates every time the object takes any action. This section consists of four keystroke handlers, one for each of the arrow keys. When each arrow key is pushed, all three objects will react according to the variables set earlier.

«prev 1 2 3 4 5 6 next»

» Level Intermediate

Added: : 2001-06-26
Rating: 6.89 Votes: 93
Hits: 8191
» Author
No details available.
» Download
Download the files used in this tutorial.
Download (9 kb)
Get conversion and unzipping tools for PC and Mac here!

» Forums
More help? Search our boards for quick answers!

Please rate this tutorial, 10 is the top rating, you can also click the comments link to read/write a review.
10 9 8 7 6 5 4 3 2 1
Read or Post Comments
 
   
 

internet.commediabistro.comJusttechjobs.comGraphics.com

Search:

WebMediaBrands Corporate Info

Legal Notices, Licensing, Permissions, Privacy Policy.
Advertise | Newsletters | Shopping | E-mail Offers | Freelance Jobs