JSDoc: Class: Particle

Creates a new Particle object.

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<static> draw()

Updates the corresponding DOM element's style property.

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<static> getCSSText(props) → {string}

Concatenates a new cssText string.

Name	Type	Description
`props`	Object	A map of object properties.

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A string representing cssText.

afterStep()

Applies additional forces.

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init(world, opt_options=)

Initializes Particle.

Name	Type	Argument	Default	Description
`world`	Object			An instance of World.
`opt_options=`	Object	<optional>		A map of initial properties.
`opt_options.width`	number	<optional>	20	Width
`opt_options.height`	number	<optional>	20	Height
`[opt_options.color`	Array			= [200, 200, 200]] Color.
`opt_options.borderWidth`	number	<optional>	this.width / 4	Border width.
`opt_options.borderRadius`	number	<optional>	100	The particle's border radius.
`opt_options.boxShadowSpread`	number	<optional>	this.width / 4	Box-shadow spread.
`opt_options.lifespan`	number	<optional>	50	The max life of the object. Set to -1 for infinite life.
`opt_options.life`	number	<optional>	0	The current life value. If greater than this.lifespan, object is destroyed.
`{opt_options.fade`	boolean			= true} If true, opacity decreases proportionally with life.
`{opt_options.shrink`	boolean			= true} If true, width and height decrease proportionally with life.
`opt_options.checkWorldEdges`	boolean	<optional>	false	Set to true to check the object's location against the world's bounds.
`opt_options.maxSpeed`	number	<optional>	4	Maximum speed.
`opt_options.zIndex`	number	<optional>	1	The object's zIndex.

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