transform method

@override Offset transform(double t)

Returns the value of the object at point t.

The value of t is nominally a fraction in the range 0.0 to 1.0, though in practice it may extend outside this range.

See also:

• evaluate, which is a shorthand for applying transform to the value of an Animation.
• Curve.transform, a similar method for easing curves.

Implementation

@override
Offset transform(double t) {
  final direction = t * pi * 2;
  return Offset.fromDirection(direction, distance) + center;
}