How to add more properties to a 2D particle?

[carlos.lunetta]

Hello all

I'm wondering what's the best way to add more properties to a 2D
particle; I need to add custom properties for animating it in a
specific way, but I'm not sure the best way to do it; Particle2D is
never directly instantiated... any hints?

[Allen Chou]

The Particle.dictionary property is exactly for this purpose.

You can create a custom initializer and assign a custom property to a particle. Say you want to create a bubble motion, and you need an extra "phase" property. Your initializer's initialize() method may look like this.

override initialize(particle:Particle):void {

//creates a "phase" property with a random value of 0 to 2pi
particle.dictionary["phase"] = 2 * Math.PI * Math.random();

}

In you custom action, the property can be accessed by providing the key string "phase".

override update(particle:Particle, emitter:Emitter, time:Number):void {

var p2D:Particle2D = Particle2D(particle);
p2D.x = 100 * p2D.dictionary["phase"];

}

[carlos.lunetta]

That's what I need!
Thanks a lot!


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