lerp method

@override Rect lerp(double t)

Returns the value this variable has at the given animation clock value.

Implementation

@override
Rect lerp(double t) {
  final centerLoc = centerTween.transform(t);

  return Rect.fromCenter(
      center: centerLoc,
      width: widthTween.lerp(t),
      height: heightTween.lerp(t));
}