Differences between version EMPTY and #6774

0a1,26
> <code haxe>
> public static function lEquation (T:Dynamic, x1:Float, x2:Float, y0:Float, y1:Float, y2:Float) :Dynamic {
> 		
> 		var x0 = (x2 - x1) * (y0 - y1) / (y2 - y1) + x1;
> 		
> 		return switch (T) {
> 			case Int: Math.round ( x0 );
> 			default : x0;
> 		}
> 	}
> </code>
> What is this equation useful? For a lot of things, here's an example how to move a progress bar when you know the percent loaded:
> <code haxe>progressBar.width = lEquation (Int, 0, 530, percent, 0, 100);</code>
> T is the type you want to return, Int or Float
> 0 - 530 means that the width of the progressBar will change from 0 to 530 when the percent will take values from 0 to 100
> 
> The math:
> <code haxe>
> 	 ( x0 - x1 )   ( y0 - y1 )
> 	 ----------- = -----------
> 	 ( x2 - x1 )   ( y2 - y1 )
> 
> 	       (x2-x1)*(y0-y1)
> 	 x0 = ----------------- +x1
> 	           (y2-y1)
> </code>
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