// simulation.h      for traffic simulation

#ifndef SIMULATION_H_
#define SIMULATION_H_

#include <cmath>
#include "delay.h"
#include "x_plot_d.h"  // or some other plot package

//float fabs(float a)
//{
//  return a>=0.0?a:(-a);
//}

// 
  extern int CLK_PER_SEC; // speed control, set in main()
  extern float my_scale; // user must scale simulation to screen/window

  enum direction { north, east, south, west, reset };
  enum signal_state { green, yellow, red , none, stop };
  void initialize(void);
  int unique_id(void);
  void get_offsets(direction moving,
		   float &x_offset,
		   float &y_offset);
// end simulation.h

#endif  // SIMULATION_H_