update method

void update(
  1. double deltaTime
)

Implementation

void update(double deltaTime) {
  switch (_state) {
    case TweenState.forwarding:
      t += deltaTime * _speed;
      if (t > 1) stop();
      break;
    case TweenState.backwarding:
      t -= deltaTime * _speed;
      if (t < 0) stop();
      break;
    default:
  }
}