target property

double get target

Implementation

double get target => _target;

set target (double target)

Set a new target. The spring picks up from its current value and velocity. If the direction flips, velocity is negated (preserving momentum).

Implementation

set target(double target) {
  if (_target != target) {
    final wasGoingPositively = _target > _startValue;
    final willBeGoingPositively = target > value;
    if (wasGoingPositively != willBeGoingPositively) {
      _velocity = -_velocity;
    }
    _startValue = value;
    _target = target;
    _delta = _target - _startValue;
    if (_startValue != _target) {
      _curT = 0.0;
      _isDone = false;
      _accelerationMultiplier = 0.0;
    }
  }
}