Flash Tutorials - Herong's Tutorial Examples - v3.03, by Dr. Herong Yang
More Action Instructions and Less SWF Tags
This section provides a tutorial example that uses action instructions to do almost everything without using SWF definition tags and display list control tags.
If love script programing, we can use more action instructions and less SWF tags. Here is another SWFTools script example, ping_pong_enhanced.sc:
#- ping_pong_enhanced.sc
#- Copyright (c) 2014 by Dr. Herong Yang, herongyang.com
#
.flash bbox=300x100 background=gray fps=6
.frame 1
.action:
this.n = 0;
createTextField("caption", 0, 10, 75, 100, 20);
createEmptyMovieClip("ball", 1);
ball.beginFill(0xFFFF00);
ball.moveTo(0, 0);
ball.lineTo(10, 0);
ball.lineTo(10, 10);
ball.lineTo(0, 10);
ball.lineTo(0, 0);
ball.endFill();
.end
.frame 2
.action:
_root.n = this.n + 1; // _root = this
caption.text = "Loop: "+this.n;
ball._x=10;
ball._y=45;
.end
.frame 3
.action:
ball._x=145;
ball._y=20;
.end
.frame 4
.action:
ball._x=280;
ball._y=45;
.end
.frame 5
.action:
gotoFrame(1); // index 1 = #2
play();
.end
.end
If we compile the code and dump the SWF file, we will see:
C:\herong>\local\SWFTools\swfc -o ping_pong_enhanced.swf
ping_pong_enhanced.sc
C:\herong>\local\SWFTools\swfdump --full ping_pong_enhanced.swf
[HEADER] File version: 6
[HEADER] File is zlib compressed. Ratio: 51%
[HEADER] File size: 653
[HEADER] Frame rate: 6.000000
[HEADER] Frame count: 5
[HEADER] Movie width: 300.00
[HEADER] Movie height: 100.00
[009] 3 SETBACKGROUNDCOLOR (be/be/be)
[00c]351 DOACTION
(91 bytes) action: Constantpool(10 entries) String:"this"
String:"n" String:"caption" String:"createTextField"
String:"ball" String:"createEmptyMovieClip"
String:"beginFill" String:"moveTo" String:"lineTo"
String:"endFill"
( 2 bytes) action: Push Lookup:0 ("this")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:1 ("n") int:0
( 0 bytes) action: SetMember
(34 bytes) action: Push int:20 int:100 int:75 int:10
int:0 Lookup:2 ("caption") int:6 Lookup:3 ("createTextField")
( 0 bytes) action: CallFunction
( 0 bytes) action: Pop
(14 bytes) action: Push int:1 Lookup:4 ("ball") int:2
Lookup:5 ("createEmptyMovieClip")
( 0 bytes) action: CallFunction
( 0 bytes) action: Pop
(12 bytes) action: Push int:16776960 int:1 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:6 ("beginFill")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
(17 bytes) action: Push int:0 int:0 int:2 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:7 ("moveTo")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
(17 bytes) action: Push int:0 int:10 int:2 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:8 ("lineTo")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
(17 bytes) action: Push int:10 int:10 int:2 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:8 ("lineTo")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
(17 bytes) action: Push int:10 int:0 int:2 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:8 ("lineTo")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
(17 bytes) action: Push int:0 int:0 int:2 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:8 ("lineTo")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
( 7 bytes) action: Push int:0 Lookup:4 ("ball")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:9 ("endFill")
( 0 bytes) action: CallMethod
( 0 bytes) action: Pop
( 0 bytes) action: End
[001] 0 SHOWFRAME 1 (00:00:00,000)
[00c]138 DOACTION
(46 bytes) action: Constantpool(9 entries) String:"_root"
String:"n" String:"this" String:"caption" String:"text"
String:"Loop: " String:"ball" String:"_x" String:"_y"
( 2 bytes) action: Push Lookup:0 ("_root")
( 0 bytes) action: GetVariable
( 4 bytes) action: Push Lookup:1 ("n") Lookup:2 ("this")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:1 ("n")
( 0 bytes) action: GetMember
( 5 bytes) action: Push int:1
( 0 bytes) action: Add2
( 0 bytes) action: SetMember
( 2 bytes) action: Push Lookup:3 ("caption")
( 0 bytes) action: GetVariable
( 6 bytes) action: Push Lookup:4 ("text")
Lookup:5 ("Loop: ") Lookup:2 ("this")
( 0 bytes) action: GetVariable
( 2 bytes) action: Push Lookup:1 ("n")
( 0 bytes) action: GetMember
( 0 bytes) action: Add2
( 0 bytes) action: SetMember
( 2 bytes) action: Push Lookup:6 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:7 ("_x") int:10
( 0 bytes) action: SetMember
( 2 bytes) action: Push Lookup:6 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:8 ("_y") int:45
( 0 bytes) action: SetMember
( 0 bytes) action: End
[001] 0 SHOWFRAME 2 (00:00:00,167)
[00c] 51 DOACTION
(13 bytes) action: Constantpool(3 entries) String:"ball"
String:"_x" String:"_y"
( 2 bytes) action: Push Lookup:0 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:1 ("_x") int:145
( 0 bytes) action: SetMember
( 2 bytes) action: Push Lookup:0 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:2 ("_y") int:20
( 0 bytes) action: SetMember
( 0 bytes) action: End
[001] 0 SHOWFRAME 3 (00:00:00,333)
[00c] 51 DOACTION
(13 bytes) action: Constantpool(3 entries) String:"ball"
String:"_x" String:"_y"
( 2 bytes) action: Push Lookup:0 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:1 ("_x") int:280
( 0 bytes) action: SetMember
( 2 bytes) action: Push Lookup:0 ("ball")
( 0 bytes) action: GetVariable
( 7 bytes) action: Push Lookup:2 ("_y") int:45
( 0 bytes) action: SetMember
( 0 bytes) action: End
[001] 0 SHOWFRAME 4 (00:00:00,500)
[00c] 7 DOACTION
( 2 bytes) action: GotoFrame 1
( 0 bytes) action: Play
( 0 bytes) action: End
[001] 0 SHOWFRAME 5 (00:00:00,667)
[000] 0 END
As you can see the entire SWF application is done by action instructions. There is no definition tags, display list contract tags and other control tags. See the following high level dump:
C:\herong>\local\SWFTools\swfdump ping_pong_enhanced.swf [HEADER] File version: 6 [HEADER] File is zlib compressed. Ratio: 51% [HEADER] File size: 653 [HEADER] Frame rate: 6.000000 [HEADER] Frame count: 5 [HEADER] Movie width: 300.00 [HEADER] Movie height: 100.00 [009] 3 SETBACKGROUNDCOLOR (be/be/be) [00c] 351 DOACTION [001] 0 SHOWFRAME 1 (00:00:00,000) [00c] 138 DOACTION [001] 0 SHOWFRAME 2 (00:00:00,167) [00c] 51 DOACTION [001] 0 SHOWFRAME 3 (00:00:00,333) [00c] 51 DOACTION [001] 0 SHOWFRAME 4 (00:00:00,500) [00c] 7 DOACTION [001] 0 SHOWFRAME 5 (00:00:00,667) [000] 0 END
Play ping_pong_enhanced.swf. It works nicely:
C:\herong>\local\bin\flashplayer_13_sa ping_pong_enhanced.swf
Table of Contents
Adobe Flash Player Plugin for Firefox
Adobe Flash Player Plugin for Chrome
Adobe Flash Player Plugin for Safari
Adobe Flash Player ActiveX for IE
Using "object" Elements for Flash Files
Using "embed" Elements for Flash Files
"mp3player" - MP3 Music Player
SWFObject - Hidding "object" behind JavaScript
SWFTools - SWF File Manipulation Tools
SWFC Script to Generate Flash SWF Files
ActionScript Embedded in SWFC Script
AS3Compile - ActionScript 3 Compiler
Flash Player Lifecycle - Timeline and Frame Rate
SWF Tag Process Flow - SHOWFRAME Synchronization
Showing SWF Tag Details - "swfdump --full"
Flash Player Supports Dynamic Actions
Action Instruction Example - "GotoFrame"
Creating Display Objects with Action Instructions
►More Action Instructions and Less SWF Tags