/* killer.r started life as counter.r
/* modified by Richard Werbin 8/1/86 to change a mild mannered robot
/* into one that shoots & pursues anything in sight    */
/* scan in a counter-clockwise direction (increasing degrees) */
/* remove redundant runs */
/* change res to 5, improve aim to angle + res/2 */
/* keep approaching at 100% while range >250*/
/* shoot first , approach */
main()
{
  int angle,ang, range;
  int res,back;
  register int d;
  long i;
  back = 15;
  res = 5;
  d = damage();
  angle = rand(360);
  while(1) {
    while ((range = scan(angle,res)) > 0) {
      cannon(angle,range);
      if (range > 700) { /* out of range, head toward it */
        drive(angle,50);
        i = 1;
        while (i++ < 50) /* use a counter to limit move time */
          ;
        drive (angle,0);
        angle -= back;
        ang=angle;
      } else
        if (range > 400) { /* in range, shoot & head toward it */
 /*         angle += res/2;*/ /* adjust for res error */
          drive(angle+res,100);
          cannon(angle,range);  /* adjust for movement */
          i = 1;
          while (i++ < 50) /* use a counter to limit move time */
            ;
          drive (angle-res,0);
          angle -= back;
        } else {
/*        angle += res/2;*/ /* adjust for res error */
        cannon(angle,range);
        while (cannon(angle,range) == 0)
          ;
        angle -=back*2;
        ang = angle;
      }
    }
    if (d != damage()) {
      d = damage();
      run();
    }

    angle += res;
    if ( ang=angle)  /* test for "frozen" scan */
      angle +=res;
    angle %= 360;
    ang = angle;
  }
}


int last_dir;

/* run moves around the center of the field */

run()
{
  int x, y;
  int i;

  x = loc_x();
  y = loc_y();

  if (last_dir == 0) {
    if (y > 512) {
      last_dir = 1;
      drive(270,100);
      while (y -100 < loc_y() && i++ < 100)
        ;
      drive(270,0);
    } else {
      last_dir = 1;
      drive(90,100);
      while (y +100 > loc_y() && i++ < 100)
        ;
      drive(90,0);
    }
  } else {
    if (x > 512) {
      last_dir = 0;
      drive(180,100);
      while (x -100 < loc_x() && i++ < 100)
        ;
      drive(180,0);
    } else {
      last_dir = 0;
      drive(0,100);
      while (x +100 > loc_x() && i++ < 100)
        ;
      drive(0,0);[
    }
  }
}

/* end of counter.r */
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