flast.js
// transform the point from page space to canvas space
transform the point from page space to canvas space
transform the point from page space to canvas space
_transformedPoint(x, y) {
    let pt = this._svg.createSVGPoint()
    pt.x = x * this._pixelRatio()
    pt.y = y * this._pixelRatio()
    return pt.matrixTransform(this._transform.inverse())
  }
_transformedPoint ( x , y ) { let pt = this . _svg . createSVGPoint ( ) pt . x = x * this . _pixelRatio ( ) pt . y = y * this . _pixelRatio ( ) return pt . matrixTransform ( this . _transform . inverse ( ) ) }
transform the point from page space to canvas space
transform the point from page space to canvas space