lerp method

  1. @override
Offset lerp (double t)
override

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

The default implementation of this method uses the +, -, and * operators on T. The begin and end properties must therefore be non-null by the time this method is called.

Implementation 

@override
Offset lerp(double t) {
  if (_dirty)
    _initialize();
  if (t == 0.0)
    return begin;
  if (t == 1.0)
    return end;
  if (_beginAngle == null || _endAngle == null)
    return Offset.lerp(begin, end, t);
  final double angle = lerpDouble(_beginAngle, _endAngle, t);
  final double x = math.cos(angle) * _radius;
  final double y = math.sin(angle) * _radius;
  return _center + Offset(x, y);
}