update method

@override void update(double t)

Sets the motion to a specific point in time. The t value that is passed in is a normalized value 0.0 to 1.0 of the duration of the motion. Every motion will always recieve a callback with the end time point (1.0), unless it is cancelled.

Implementation

@override
void update(double t) {
  if (t < _split) {
    // Play first motion
    double ta;
    if (_split > 0.0) {
      ta = (t / _split).clamp(0.0, 1.0);
    } else {
      ta = 1.0;
    }
    _updateWithCurve(_a, ta);
  } else if (t >= 1.0) {
    // Make sure everything is finished
    if (!_a._finished) _finish(_a);
    if (!_b._finished) _finish(_b);
  } else {
    // Play second motion, but first make sure the first has finished
    if (!_a._finished) _finish(_a);
    double tb;
    if (_split < 1.0) {
      tb = (1.0 - (1.0 - t) / (1.0 - _split)).clamp(0.0, 1.0);
    } else {
      tb = 1.0;
    }
    _updateWithCurve(_b, tb);
  }
}