Silverlight 萤火虫 效果

概述  Procedural Animation written by Rick Barraza, revised by Adam Kinney Most designers have their wake up moment with programming Flash when they finally understand the power of onEnterFrame() to be in

 

Procedural Animation written by Rick Barraza,revised by Adam Kinney

Most designers have their wake up moment with programming Flash when they finally understand the power of onEnterFrame() to be interactive in a way that is impossible with timeline based tweens. The Flash Metaphor is one of a movIE,with a master timeline that always run and every indivIDual MovIEClip being capable of having its own internal timeline running in parallel as well. In fact,you really can't get around it. A timeline is tightly coupled to every MovIEClip,even if that timeline is only one frame long. But harnessing the constant and repetitive power of code attached to this onEnterFrame event gives you unprecedented and dynamic control that leaves sequential animations in the dust.

When using onEnterFrame() to control multiple animations on stage,you will usually first decIDe if you want one onEnterFrame() on the primary KeyFrame controlling all the "dumb" MovIEClips,or if you want each MovIEClip to be "smart" and calculate its own motion. Often,either solution would work so it may come down to developer preference. So let's look at both techniques and see how to duplicate them in Silverlight.

Duplicating a Single onEnterFrame() Manager

Here is a sample Flash movIE that controls its particles with a single onEnterFrame() on the first KeyFrame.

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原文地址和下载:

http://channel9.msdn.com/continuum/tutorials/ProceduralAnimation/

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