code: function multiplyVectorInverse(v) {
           var a = this.val,
               x = v.x,
               y = v.y;
           var invD = 1 / (a[0] * a[4] + a[3] * -a[1]);
           v.x = a[4] * invD * x + -a[3] * invD * y + (a[7] * a[3] - a[6] * a[4]) * invD;
           v.y = a[0] * invD * y + -a[1] * invD * x + (-a[7] * a[0] + a[6] * a[1]) * invD;
           return v;
         }
docs: Transforms the given vector using the inverted current matrix.
  @name multiplyVector
  @memberOf me.Matrix2d
  @function
  @param {me.Vector2d} vector the vector object to be transformed
  @return {me.Vector2d} result vector object. Useful for chaining method calls.