#ifndef INTERPOLATION_H_861230A8
#define INTERPOLATION_H_861230A8

class Interpolation {
public:

  void start(int length) {
    length_ = length;
    thus_ = 0;
  }

  void tick(double dt) {
    if (thus_ < length_) {
      thus_ += dt;
      if (thus_ >= length_) {
        thus_ = length_;
      }
    }
  }

  // Info

  double getProgress(double from, double to) const {
    return (to - from) / length_ * thus_ + from;
  }

  bool isComplete() const { return thus_ == length_; }

private:

  double progress_ = 0.0;
  double dest_ = 0.0;
  double start_ = 0.0;
  double length_ = 0.0;
  double thus_ = 0.0;
};

#endif /* end of include guard: INTERPOLATION_H_861230A8 */