var Vector2 = require('./Vector2'); 
var TransformXY = function (x, y, positionX, positionY, rotation, scaleX, scaleY, output){ 
if (output === undefined) { 
output = new Vector2(); 
} 
var sr = Math.sin(- rotation); 
var cr = Math.cos(- rotation); 
var a = cr * scaleX; 
var b = - sr * scaleX; 
var c = sr * scaleY; 
var d = cr * scaleY; 
var n = a * d - b * c; 
var m0 = d / n; 
var m1 = - b / n; 
var m2 = - c / n; 
var m3 = a / n; 
var m4 = (c * positionY - d * positionX) / n; 
var m5 = - (a * positionY - b * positionX) / n; 
output.x = x * m0 + y * m2 + m4; 
output.y = x * m1 + y * m3 + m5; 
return output; 
} 
; 
module.exports = TransformXY;