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Easeljs - Mask & Subtract Front Shape


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I have not yet worked with the alpha filters but for a normal mask I don't think there is an easy way of doing it. I would probably have made the inverted mask in Flash IDE and then exported it with Toolkit For CreateJS. That is, the exported mask would be a big rectangle with a cut out circle in the middle. A 100x100 rect with a 33 diameter circle in the middle produces the following code:

 

	this.shape = new cjs.Shape();
	this.shape.graphics.beginFill("rgba(255,255,255,0.761)").beginStroke().moveTo(-50,50).lineTo(-50,-50).lineTo(50,-50).lineTo(50,50).closePath()
	.moveTo(-12.2,-12.1).curveTo(-17,-7.3,-17,-0.5).curveTo(-17,6.4,-12.2,11.1).curveTo(-7.3,16,-0.5,16).curveTo(6.4,16,11.1,11.1).curveTo(16,6.4,16,-0.5).curveTo(16,-7.3,11.1,-12.1).curveTo(6.4,-17,-0.5,-17).curveTo(-7.3,-17,-12.2,-12.1).closePath();
	

    

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