*drawlogic » elastic http://drawlogic.com interactive and game development technologies for the web - flash, flex, unity3d, silverlight, javascript Thu, 17 May 2012 13:12:20 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 AS3SWF Tool and Flash Shapes Under the Hood http://drawlogic.com/2009/09/09/as3swf-tool-and-flash-shapes-under-the-hood/ http://drawlogic.com/2009/09/09/as3swf-tool-and-flash-shapes-under-the-hood/#comments Wed, 09 Sep 2009 17:19:15 +0000 drawk http://drawlogic.com/?p=638 Claus Wahlers has a great post on some lower level Flash handling for shapes.  He posts about a tool called as3swf which helps to look into the raw shapes and vector drawing calls in the flash engine.

The output of this tool gives the raw machine code/assembly like procedural output that is very similar to other rendering engines. It actually makes me think of OpenGL a bit in the output switch based, procedural flow except this if for vector drawing rather than raster.

Sample output

[83:DefineShape4] ID: 1
  FillStyles:
    [1] [SWFFillStyle] Type: 0 (solid), Color: 666666
  LineStyles:
    [1] [SWFLineStyle2] Width: 200, Color: ff0000
  ShapeRecords:
    [SWFShapeRecordStyleChange] MoveTo: 400,400, FillStyle1: 1, LineStyle: 1
    [SWFShapeRecordStraightEdge] Horizontal: 2000
    [SWFShapeRecordStraightEdge] Vertical: 2000
    [SWFShapeRecordStraightEdge] Horizontal: -2000
    [SWFShapeRecordStraightEdge] Vertical: -2000
    [SWFShapeRecordEnd]

It is always good to know what is going on in lower levels to better code for projects that perform well.  Another great post on this is the Elastic Racetrack of the AS3 and AVM2 virtual machine which describes how the AVM2 handles drawing those low level shape calls in addition to handling script.

]]> http://drawlogic.com/2009/09/09/as3swf-tool-and-flash-shapes-under-the-hood/feed/ 2 A Peek into the AS3 and AVM2 Virtual Machine and ‘Elastic Racetrack’ http://drawlogic.com/2008/04/22/a-peek-into-the-as3-and-avm2-virtual-machine-and-elastic-racetrack/ http://drawlogic.com/2008/04/22/a-peek-into-the-as3-and-avm2-virtual-machine-and-elastic-racetrack/#comments Wed, 23 Apr 2008 01:23:34 +0000 drawk http://drawk.wordpress.com/?p=198 Sean Christmann has a nice post on the AS3 AVM 2 ‘Elastic Racetrack’ cycles or virtual machine tick that runs an ES4 based javascript version of actionscript which we all know and love. The post has some info on how the AVM2 cycles run and can provide benefits to understanding frame rates and how execution is divided between script and render as well as player code from user code.

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