Example #1
0
void reset(void) {
    int i;
    char text[4];
    text[1]='s';
    text[3]='\0';
    emitter = wb_robot_get_device("emitter");
    rec = wb_robot_get_device("receiver");
}
static void reset(void) {
  wb_robot_init();                // Initialization 
  char s[4]="ps0";
  int i;
  for(i=0; i<NB_SENSORS;i++) {
    ps[i]=wb_robot_get_device(s);      // the device name is specified in the world file
    s[2]++;                         // increases the device number
  }
  gps=wb_robot_get_device("gps");
}
Example #3
0
int main() {
  wb_robot_init();
  
  printf("hello from NAO\n");
  
  time_step = wb_robot_get_basic_time_step();
  

  receiver = wb_robot_get_device("receiver");
  wb_receiver_enable(receiver, time_step);
  
  emitter = wb_robot_get_device("emitter2");
  wb_receiver_enable(emitter, time_step);
  
  
  find_and_enable_devices();
  
  wb_motor_set_position (RShoulderPitch, 1.57079633);
  wb_motor_set_position (LShoulderPitch, 1.57079633);
  wb_motor_set_position (HeadYaw, 0.0);
  //wb_motor_set_position (HeadPitch, 0.1); //10 degrees




  // run until simulation is restarted
  while (wb_robot_step(time_step) != -1) {
  

      //check_for_new_genes();
      //sense_compute_and_actuate();
      //int samples = wb_camera_get_width(LaserHead);
      //double field_of_view = wb_camera_get_fov(LaserHead);
      //const float *values = wb_camera_get_range_image(LaserHead);
      
      report_step_state_to_supervisor();
      
      //printf("%f\n", field_of_view);
      //printf("size: %d\n", sizeof(values));
      //int i;
      //for(i=0; i<samples;i++){
      //  printf("value %d is %f\n",i, values[i]);
      //}
      
      if(wb_robot_step(time_step) == 0){
          //report_step_state_to_supervisor();
      }
  }

  wb_robot_cleanup();

  return 0;
}
Example #4
0
int main() {

  double w_left, w_right;

  wb_robot_init();
  
  WbDeviceTag human02_wheel;
  human02_wheel = wb_robot_get_device("human02_plate");

  int time_step = wb_robot_get_basic_time_step();

  wb_differential_wheels_enable_encoders(time_step);
  
  for (;;)
  {
    w_left = 10.;
    w_right = 10.;
    wb_differential_wheels_set_speed(w_left, w_right);
    
    //printf("  left_encoder=%7.5f\n",wb_differential_wheels_get_left_encoder());
  
    wb_robot_step(32);
  }
  return 0;
}
Example #5
0
static void reset(void)
{ 
  int i;
  char text[5]="led0";
  for(i=0;i<NB_LEDS;i++) {
    led[i]=wb_robot_get_device(text);
    text[3]++;
    wb_led_set(led[i],0); 
  }

  // enable the camera
  cam = wb_robot_get_device("camera");
  wb_camera_enable(cam,TIME_STEP_CAM);
  width = wb_camera_get_width(cam);
  height = wb_camera_get_height(cam);
}
int main(int argc, char *argv[]) {
  /* define variables */
  WbDeviceTag turret_sensor;
  double perf_data[3];
  double clock = 0;

  /* initialize Webots */
  wb_robot_init();
  
  // read robot id from the robot's name
  char* robot_name;
  robot_name=(char*) wb_robot_get_name(); 
  sscanf(robot_name,"e-puck%d",&robot_id);
  
  emitter = wb_robot_get_device("emitter");
  wb_emitter_set_range(emitter,COM_RANGE);
  receiver = wb_robot_get_device("receiver");
  wb_receiver_set_channel(receiver,0);
  wb_receiver_enable(receiver,TIME_STEP);

  wb_robot_step(TIME_STEP);
  
  turret_sensor = wb_robot_get_device("ts");
  wb_light_sensor_enable(turret_sensor,TIME_STEP);    

  /* main loop */
  while (wb_robot_step(TIME_STEP) != -1) {
    clock += (double)TIME_STEP/1000;
    /* get light sensor value */
    sensor_value = wb_light_sensor_get_value(turret_sensor);

    if(wb_receiver_get_queue_length(receiver) > 0) {
      wb_emitter_set_channel(emitter,3);
      perf_data[0] = (double)robot_id;
      perf_data[1] = (double)(pkt_count-1);
      perf_data[2] = 0;
      wb_emitter_send(emitter,perf_data,3*sizeof(double));
      break; // stop node
    }
    else {
      send_data(clock); // send measurement data
    }
  }
  wb_robot_cleanup();

  return 0;
}
/*
 * Reset the robot's devices and get its ID
 */
static void reset() 
{
   int i;
   wb_robot_init();
   char s[4]="ps0";
   for(i=0; i<NB_SENSORS;i++) {
      ds[i]=wb_robot_get_device(s); // the device name is specified in the world file
      s[2]++;           // increases the device number
   }
   
   for(i=0; i<FLOCK_SIZE; i++) {
      timestamp[i] = 0;
      relative_pos[i][0] = 0;
      relative_pos[i][1] = 0;
      relative_pos[i][2] = 0;
   }
   maxTimestamp = 1;
   
   robot_name=(char*) wb_robot_get_name();
   
   for(i=0;i<NB_SENSORS;i++)
      wb_distance_sensor_enable(ds[i],64);

   my_position[0] = 0;
   my_position[1] = 0;
   my_position[2] = 0;
   //printf("reset: my pos: %f, %f\n", my_position[0], my_position[1]);
 
   wb_differential_wheels_enable_encoders(64);
   //Reading the robot's name. Pay attention to name specification when adding robots to the simulation!
   sscanf(robot_name,"epuck%d",&robot_id_u); // read robot id from the robot's name
   robot_id = robot_id_u%FLOCK_SIZE;     // normalize between 0 and FLOCK_SIZE-1
   sprintf(robot_number, "%d", robot_id_u);
   
   receiver = wb_robot_get_device("receiver");
   receiver0 = wb_robot_get_device("receiver0");
   emitter = wb_robot_get_device("emitter");
   emitter0 = wb_robot_get_device("emitter0");

   wb_receiver_enable(receiver,32);
   wb_receiver_enable(receiver0,32);
   
   for(i=0; i<FLOCK_SIZE; i++) {
      initialized[i] = 0;       // Set initialization to 0 (= not yet initialized)
   }
}
Example #8
0
void reset()
{
  int i;
  robotName = wb_robot_get_name();
  currentState = FORWARD;

  // Make sure to initialize the RNG with different values for each thread
  srand(time(NULL) + (int)&robotName);

  char e_puck_name[] = "ps0";
  char sensorsName[5];

  // Emitter and receiver device tags
  emitterTag = wb_robot_get_device("emitter");
  receiverTag = wb_robot_get_device("receiver");

  // Configure communication devices
  wb_receiver_enable(receiverTag, TIME_STEP);
  wb_emitter_set_range(emitterTag, COMM_RADIUS);
  wb_emitter_set_channel(emitterTag, COMMUNICATION_CHANNEL);
  wb_receiver_set_channel(receiverTag, COMMUNICATION_CHANNEL);

  sprintf(sensorsName, "%s", e_puck_name);
  for (i = 0; i < NB_SENSORS; i++) {
    sensors[i] = wb_robot_get_device(sensorsName);
    wb_distance_sensor_enable(sensors[i], TIME_STEP);

    if ((i + 1) >= 10) {
      sensorsName[2] = '1';
      sensorsName[3]++;

      if ((i + 1) == 10) {
        sensorsName[3] = '0';
        sensorsName[4] = (char) '\0';
        }
    } else {
        sensorsName[2]++;
    }
  }

  wb_differential_wheels_enable_encoders(TIME_STEP);

  printf("Robot %s is reset\n", robotName);
  return;
}
// controller initialization
static void reset(void) {
  fitness_reset();
  int i;
  char name[] = "ps0";
  for(i = 0; i < NB_SENSORS; i++) {
    ps[i]=wb_robot_get_device(name); // get sensor handle
    // perform distance measurements every TIME_STEP millisecond
    wb_distance_sensor_enable(ps[i], TIME_STEP);
    name[2]++; // increase the device name to "ps1", "ps2", etc.
  }
}
Example #10
0
int main() {
  const char *SERVO_NAMES[NUM_SERVOS] = {
        "servo_r0",
        "servo_r1",
        "servo_r2",
        "servo_l0",
        "servo_l1",
        "servo_l2"};
  WbDeviceTag servos[NUM_SERVOS];
  int elapsed = 0;
  int state, i;
  long double pos = 0,lastPos = 0; // int 害死了  0-6.28
  int flag = 0;
  const int dir[] = {1,1,1,1,1,1};//{1,1,1,-1,-1,-1}
  // 增加在地面上的时间,就会更加稳定
  const double rate = 1.0/6;// 1/4
  
  wb_robot_init();

  for (i = 0; i < NUM_SERVOS; i++) {
    servos[i] = wb_robot_get_device(SERVO_NAMES[i]);
    if (!servos[i]) {
      printf("could not find servo: %s\n",SERVO_NAMES[i]);
    }
  }
  
  pos = M_PI * rate ;
  flag = 0;

  while(wb_robot_step(TIME_STEP)!=-1) {
    elapsed++;
    state = (elapsed / 25 + 1) % NUM_STATES;
	
    lastPos = pos;
    
    
    
    
    if(flag) pos += 2*M_PI * rate;
    else pos += 2*M_PI * (1-rate);
    flag = !flag;
	
    for (i = 0; i < 6; i+=2 ){
      wb_servo_set_position(servos[i], dir[i]*pos);
    }
    for (i = 1; i < 6; i+=2 ) {
      wb_servo_set_position(servos[i], dir[i]*lastPos); 
    }
  }
  
  wb_robot_cleanup();

  return 0;
}
Example #11
0
int main(int argc, char **argv)
{
  wb_robot_init();
  int time_step = wb_robot_get_basic_time_step();

  WbDeviceTag gps = wb_robot_get_device("GPS");
  wb_gps_enable(gps, time_step);
  WbDeviceTag emitter = wb_robot_get_device("emitter");
  wb_emitter_set_channel(emitter,13);

  double* gps_value;
  char message[32];

  while (wb_robot_step(time_step) != -1){
   gps_value = wb_gps_get_values(gps);
   //Something's wrong with deserialization 
   //So we make a fixed width string here
   sprintf(message,"{%0.3f,%0.3f}",gps_value[0]/2+5.0,-gps_value[2]/2+5.0);
   wb_emitter_send(emitter,message,strlen(message)+1);
//   printf("%s\n",message);
  }
  wb_robot_cleanup();
  return 0;
}
/*
 * Initialize flock position and devices
 */
void reset(void) {
	wb_robot_init();

	emitter = wb_robot_get_device("emitter");
	if (emitter==0) printf("missing emitter\n");
	
	char rob[7] = "epuck0";
	int i;
	for (i=0;i<FLOCK_SIZE;i++) {
		sprintf(rob,"epuck%d",i+offset);
		robs[i] = wb_supervisor_node_get_from_def(rob);
		robs_trans[i] = wb_supervisor_node_get_field(robs[i],"translation");
		robs_rotation[i] = wb_supervisor_node_get_field(robs[i],"rotation");
	}
}
Example #13
0
int main(int argc, char **argv)
{
  wb_robot_init();
  
  int i;
  WbDeviceTag servos[NSERVOS];
  WbDeviceTag head_led;
  
  for (i=0; i<NSERVOS; i++)
    servos[i] = wb_robot_get_device(servo_names[i]);
  head_led = wb_robot_get_device("HeadLed");
  wb_led_set(head_led, 0x40C040);
  
  do {
    double t = wb_robot_get_time();
    for (i=0; i<6; i++)
      wb_servo_set_position(servos[i], amplitudes[i]*sin(frequency*t) + offsets[i]);
    
  } while (wb_robot_step(TIME_STEP) != -1);
  
  wb_robot_cleanup();
  
  return 0;
}
/*
 * Reset the robot's devices and get its ID
 */
static void reset() 
{
	wb_robot_init();

	receiver = wb_robot_get_device("receiver");
	emitter  = wb_robot_get_device("emitter");
	compass2  = wb_robot_get_device("compass2");
	receiver0 = wb_robot_get_device("receiver0");
   	emitter0 = wb_robot_get_device("emitter0");

	int i;
	char s[4]="ps0";
	for(i=0; i<NB_SENSORS;i++) {
		ds[i]=wb_robot_get_device(s);  // the device name is specified in the world file
		s[2]++;				           // increases the device number
	}
	robot_name=(char*) wb_robot_get_name(); 

   	for(i=0; i<FLOCK_SIZE; i++) {
    	relative_pos[i][0] = my_position[0] = 0;
    	relative_pos[i][1] = my_position[1] = 0;
    	relative_pos[i][2] = my_position[2] = 0;
	}

	for(i=0;i<NB_SENSORS;i++)
    	wb_distance_sensor_enable(ds[i],64);

	wb_receiver_enable(receiver,64);
	wb_receiver_enable(receiver0,64);
	wb_compass_enable(compass2, 64);
	
	//Reading the robot's name. Pay attention to name specification when adding robots to the simulation!
	sscanf(robot_name,"epuck%d",&robot_id_u); // read robot id from the robot's name
	robot_id = robot_id_u%FLOCK_SIZE;	  // normalize between 0 and FLOCK_SIZE-1
  
	for(i=0; i<FLOCK_SIZE; i++) {
		initialized[i] = 0;		  // Set initialization to 0 (= not yet initialized)
	}
}
Example #15
0
static void initialize()
{
     wb_robot_init();
     
     currentBehavior = RANDOM_MOVER;
     
     ps0 = wb_robot_get_device("ps0");
     ps1 = wb_robot_get_device("ps1");
     ps2 = wb_robot_get_device("ps2");
     ps3 = wb_robot_get_device("ps3");
     ps4 = wb_robot_get_device("ps4");
     ps5 = wb_robot_get_device("ps5");
     ps6 = wb_robot_get_device("ps6");
     ps7 = wb_robot_get_device("ps7");
     
     ls0 = wb_robot_get_device("ls0");
     ls1 = wb_robot_get_device("ls1");
     ls2 = wb_robot_get_device("ls2");
     ls3 = wb_robot_get_device("ls3");
     ls4 = wb_robot_get_device("ls4");
     ls5 = wb_robot_get_device("ls5");
     ls6 = wb_robot_get_device("ls6");
     ls7 = wb_robot_get_device("ls7");
     
     led4 = wb_robot_get_device("led4");
     
     int sensorTimeout = 100;
      
     wb_distance_sensor_enable(ps0, sensorTimeout);
     wb_distance_sensor_enable(ps1, sensorTimeout);
     wb_distance_sensor_enable(ps2, sensorTimeout);
     wb_distance_sensor_enable(ps3, sensorTimeout);
     wb_distance_sensor_enable(ps4, sensorTimeout);
     wb_distance_sensor_enable(ps5, sensorTimeout);
     wb_distance_sensor_enable(ps6, sensorTimeout);
     wb_distance_sensor_enable(ps7, sensorTimeout);
    
     wb_light_sensor_enable(ls0, sensorTimeout);
     wb_light_sensor_enable(ls1, sensorTimeout);
     wb_light_sensor_enable(ls2, sensorTimeout);
     wb_light_sensor_enable(ls3, sensorTimeout);
     wb_light_sensor_enable(ls4, sensorTimeout);
     wb_light_sensor_enable(ls5, sensorTimeout);
     wb_light_sensor_enable(ls6, sensorTimeout);
     wb_light_sensor_enable(ls7, sensorTimeout);

     wb_led_set(led4, 1); 
}
Example #16
0
////////////////////////////////////////////
// Main
int main()
{
  int i, speed[2], ps_offset[NB_DIST_SENS]={0,0,0,0,0,0,0,0}, Mode=1;

  /* intialize Webots */
  wb_robot_init();

  /* initialization */
  char name[20];
  for (i = 0; i < NB_LEDS; i++) {
    sprintf(name, "led%d", i);
    led[i] = wb_robot_get_device(name); /* get a handler to the sensor */
  }
  for (i = 0; i < NB_DIST_SENS; i++) {
    sprintf(name, "ps%d", i);
    ps[i] = wb_robot_get_device(name); /* proximity sensors */
    wb_distance_sensor_enable(ps[i],TIME_STEP);
  }
  for (i = 0; i < NB_GROUND_SENS; i++) {
    sprintf(name, "gs%d", i);
    gs[i] = wb_robot_get_device(name); /* ground sensors */
    wb_distance_sensor_enable(gs[i],TIME_STEP);
  }

  for(;;)   // Main loop
  {
    // Run one simulation step
    wb_robot_step(TIME_STEP);
  
    // Reset all BB variables when switching from simulation to real robot and back
    if (Mode!=wb_robot_get_mode())
    {
      oam_reset = TRUE;
      llm_active = FALSE;
      llm_past_side = NO_SIDE;
      ofm_active = FALSE;
      lem_active = FALSE;
      lem_state = LEM_STATE_STANDBY;
      Mode = wb_robot_get_mode();
      if (Mode == SIMULATION) {
        for(i=0;i<NB_DIST_SENS;i++) ps_offset[i]=PS_OFFSET_SIMULATION[i];
        wb_differential_wheels_set_speed(0,0); wb_robot_step(TIME_STEP); // Just run one step to make sure we get correct sensor values
        printf("\n\n\nSwitching to SIMULATION and reseting all BB variables.\n\n");
      } else if (Mode == REALITY) {
        for(i=0;i<NB_DIST_SENS;i++) ps_offset[i]=PS_OFFSET_REALITY[i];
        wb_differential_wheels_set_speed(0,0); wb_robot_step(TIME_STEP); // Just run one step to make sure we get correct sensor values
        printf("\n\n\nSwitching to REALITY and reseting all BB variables.\n\n");
      }
    }
    
    // read sensors value
    for(i=0;i<NB_DIST_SENS;i++) ps_value[i] = (((int)wb_distance_sensor_get_value(ps[i])-ps_offset[i])<0)?0:((int)wb_distance_sensor_get_value(ps[i])-ps_offset[i]);
    for(i=0;i<NB_GROUND_SENS;i++) gs_value[i] = wb_distance_sensor_get_value(gs[i]);

    // Reset all BB variables when switching from simulation to real robot and back
    if (Mode!=wb_robot_get_mode())
    {
      oam_reset = TRUE;
      llm_active = FALSE;
      llm_past_side = NO_SIDE;
      ofm_active = FALSE;
      lem_active = FALSE;
      lem_state = LEM_STATE_STANDBY;
      Mode = wb_robot_get_mode();
      if (Mode == SIMULATION) printf("\nSwitching to SIMULATION and reseting all BB variables.\n\n");
      else if (Mode == REALITY) printf("\nSwitching to REALITY and reseting all BB variables.\n\n");
    }

    // Speed initialization
    speed[LEFT] = 0;
    speed[RIGHT] = 0;

// *** START OF SUBSUMPTION ARCHITECTURE ***

    // LFM - Line Following Module
    LineFollowingModule();

    // Speed computation
    speed[LEFT]  = lfm_speed[LEFT];
    speed[RIGHT] = lfm_speed[RIGHT];
 

// *** END OF SUBSUMPTION ARCHITECTURE ***

    // Debug display
    printf("OAM %d side %d   \n", oam_active, oam_side);

    // Set wheel speeds
    wb_differential_wheels_set_speed(speed[LEFT],speed[RIGHT]);
  }
  return 0;
}
Example #17
0
int main(int argc, char **argv)
{
  printf("Comenzo todo\n");
  wb_robot_init();
  printf("Iniciando el sistema\n");  
  ros::init(argc, argv, "NEURONAL");  
  ros::NodeHandle n,nh,nh2;  
  ros::Subscriber chatter_sub = n.subscribe("/auto_controller/command", 100, chatterCallback);
  
  
  // find front wheels
  left_front_wheel = wb_robot_get_device("left_front_wheel");
  right_front_wheel = wb_robot_get_device("right_front_wheel");
  wb_servo_set_position(left_front_wheel, INFINITY);
  wb_servo_set_position(right_front_wheel, INFINITY);
  
  // get steering motors
  left_steer = wb_robot_get_device("left_steer");
  right_steer = wb_robot_get_device("right_steer");

  // camera device
  camera = wb_robot_get_device("camera");
  wb_camera_enable(camera, TIME_STEP);
  camera_width = wb_camera_get_width(camera);
  camera_height = wb_camera_get_height(camera);
  camera_fov = wb_camera_get_fov(camera);

  
  // initialize gps
  gps = wb_robot_get_device("gps");
  wb_gps_enable(gps, TIME_STEP);
  
 
  
  // initialize display (speedometer)
  display = wb_robot_get_device("display");
  speedometer_image = wb_display_image_load(display, "/root/research/PROYECTOTP/controllers/destiny_controller/speedometer.png");
  wb_display_set_color(display, 0xffffff);
  
    // SICK sensor
  sick = wb_robot_get_device("lms291");
  wb_camera_enable(sick, TIME_STEP);
  sick_width = wb_camera_get_width(sick);
  sick_range = wb_camera_get_max_range(sick);
  sick_fov = wb_camera_get_fov(sick);
  
  // start engine
  speed=64.0; // km/h
  // main loop
  printf("Iniciando el ciclo de peticiones\n");
  
 // set_autodrive(false);z
  while (1) {
    
    const unsigned char *camera_image = wb_camera_get_image(camera);
    
    compute_gps_speed();
    update_display();        
    ros::spinOnce();

     wb_robot_step(TIME_STEP);
  }

  wb_robot_cleanup();

  return 0;  // ignored

}
Example #18
0
// entry point of the controller
int main(int argc, char **argv)
{
  // initialize the Webots API
  wb_robot_init();
  // internal variables
  int i;
  WbDeviceTag ps[8];
  char ps_names[8][4] = {
    "ps0", "ps1", "ps2", "ps3",
    "ps4", "ps5", "ps6", "ps7"
  };
  
  // initialize devices
  for (i=0; i<8 ; i++) {
    ps[i] = wb_robot_get_device(ps_names[i]);
    wb_distance_sensor_enable(ps[i], TIME_STEP);
  }
  
  WbDeviceTag ls[8];
  char ls_names[8][4] = {
    "ls0", "ls1", "ls2", "ls3",
    "ls4", "ls5", "ls6", "ls7"
  };
  
  // initialize devices
  for (i=0; i<8 ; i++) {
    ls[i] = wb_robot_get_device(ls_names[i]);
    wb_light_sensor_enable(ls[i], TIME_STEP);
  }
  
  WbDeviceTag led[8];
  char led_names[8][5] = {
    "led0", "led1", "led2", "led3",
    "led4", "led5", "led6", "led7"
  };
  
  // initialize devices
  for (i=0; i<8 ; i++) {
    led[i] = wb_robot_get_device(led_names[i]);
  }
  
  // feedback loop
  while (1) { 
    // step simulation
    int delay = wb_robot_step(TIME_STEP);
    if (delay == -1) // exit event from webots
      break;
 
    // read sensors outputs
    double ps_values[8];
    for (i=0; i<8 ; i++)
      ps_values[i] = wb_distance_sensor_get_value(ps[i]);
    
    update_search_speed(ps_values, 250);
    
    // set speeds
    double left_speed  = get_search_left_wheel_speed();
    double right_speed = get_search_right_wheel_speed();
    
    
    // read IR sensors outputs
    double ls_values[8];
    for (i=0; i<8 ; i++){
        ls_values[i] = wb_light_sensor_get_value(ls[i]);
      }
    
    int active_ir = FALSE;
    for(i=0; i<8; i++){
      if(ls_values[i] < 2275){
        active_ir = TRUE;
      }
    }
    
    if(active_ir == TRUE){
      swarm_retrieval(ls_values, ps_values, 2275);
      left_speed = get_retrieval_left_wheel_speed();
      right_speed = get_retrieval_right_wheel_speed();
    }
    
    if(is_pushing() == TRUE || stagnation == TRUE){
    // check for stagnation
	stagnation_counter = stagnation_counter + 1;
	if(stagnation_counter == min((50 + positive_feedback * 50), 300) && stagnation == FALSE){
		stagnation_counter = 0; // reset counter
		stagnation_check = TRUE;
		for(i=0; i<8; i++)
                      prev_dist_values[i] = ps_values[i];
	}
	
	if(stagnation_check == TRUE){
            left_speed = 0;
            right_speed = 0;	
	}

	if(stagnation_check == TRUE && stagnation_counter == 5){
		stagnation_counter = 0; // reset counter
		reset_stagnation();
		valuate_pushing(ps_values, prev_dist_values);
		stagnation = get_stagnation_state();
		stagnation_check = FALSE;
		if(stagnation == TRUE)
                      positive_feedback = 0;
                   else
                      positive_feedback = positive_feedback + 1;
	}

	if(stagnation == TRUE){
		stagnation_recovery(ps_values, 300);
		left_speed = get_stagnation_left_wheel_speed();
		right_speed = get_stagnation_right_wheel_speed();
		if(get_stagnation_state() == FALSE){
			reset_stagnation();
			stagnation = FALSE;
			stagnation_counter = 0;
		}
	}
    }

    // write actuators inputs
    wb_differential_wheels_set_speed(left_speed, right_speed);
    
    for(i=0; i<8; i++){
      wb_led_set(led[i], get_LED_state(i));
    }
    
  }
  
  // cleanup the Webots API
  wb_robot_cleanup();
  return 0; //EXIT_SUCCESS
}
Example #19
0
//
// Reset the robot controller and initiate the sensors and emitter/receiver
//
static int reset()
{  
  int i;
  mode =1;
  emitter = wb_robot_get_device("emitter");
  //buffer = (double *) emitter_get_buffer(emitter);
 
  receiver = wb_robot_get_device("receiver");
  
  wb_receiver_enable(receiver, TIME_STEP);
  
  char text[5]="led0";
  for(i=0;i<NB_LEDS;i++) {
    led[i]=wb_robot_get_device(text); // get a handler to the sensor 
    text[3]++; // increase the device name to "ps1", "ps2", etc. 
  }
  
  text[0]='p';
  text[1]='s';
  text[3]='\0';
  
  text[2]='0';
  ps[0] = wb_robot_get_device(text); // proximity sensors
  text[2]='7';
  ps[1] = wb_robot_get_device(text); // proximity sensors
  text[2]='1';
  ps[2] = wb_robot_get_device(text); // proximity sensors
  text[2]='6';
  ps[3] = wb_robot_get_device(text); // proximity sensors
  text[2]='2';
  ps[4] = wb_robot_get_device(text); // proximity sensors
  text[2]='5';
  ps[5] = wb_robot_get_device(text); // proximity sensors
  text[2]='3';
  ps[6] = wb_robot_get_device(text); // proximity sensors
  text[2]='4';
  ps[7] = wb_robot_get_device(text); // proximity sensors

  // Enable proximity and floor sensors
  for(i=0;i<NB_DIST_SENS;i++) {
    wb_distance_sensor_enable(ps[i],TIME_STEP);
    printf("ps[%d] is active\n",i);
  }
  
  // Enable GPS sensor to determine position
  gps=wb_robot_get_device("gps");
  wb_gps_enable(gps, TIME_STEP);
  printf("gps is active\n");
  
  return 1;
}
int main(int argc, char **argv)
{
  printf("Comenzo todo\n");
  wb_robot_init();
  printf("Iniciando el sistema\n");
  // Ros initialization
  ros::init(argc, argv, "Simulador");
  ros::init(argc, argv, "Imagenes_de_Simulador");
  ros::NodeHandle n,nh,nh2;
  
 // ros::Subscriber chatter_sub = n.subscribe("/auto_controller/command", 100, chatterCallback);
  
  ros::Subscriber chatter_sub = n.subscribe("/auto_controller/command", 100, chatterCallback);
  image_transport::ImageTransport it(nh);
	
	//OpenCV HighGUI call to destroy a display window on shut-down.
  
  image_transport::ImageTransport it2(nh2);
  image_transport::Publisher pub2 = it.advertise("/webot/camera", 1);
  
  //ros::spin();
  // find front wheels
  left_front_wheel = wb_robot_get_device("left_front_wheel");
  right_front_wheel = wb_robot_get_device("right_front_wheel");
  wb_servo_set_position(left_front_wheel, INFINITY);
  wb_servo_set_position(right_front_wheel, INFINITY);
  
  // get steering motors
  left_steer = wb_robot_get_device("left_steer");
  right_steer = wb_robot_get_device("right_steer");

  // camera device
  camera = wb_robot_get_device("camera");
  wb_camera_enable(camera, TIME_STEP);
  camera_width = wb_camera_get_width(camera);
  camera_height = wb_camera_get_height(camera);
  camera_fov = wb_camera_get_fov(camera);

  
  // initialize gps
  gps = wb_robot_get_device("gps");
  wb_gps_enable(gps, TIME_STEP);
  
 
  
  // initialize display (speedometer)
  display = wb_robot_get_device("display");
  speedometer_image = wb_display_image_load(display, "/root/research/PROYECTOTP/controllers/destiny_controller/speedometer.png");
  wb_display_set_color(display, 0xffffff);
  
  // start engine
  speed=64.0; // km/h

  //print_help();
  
  // allow to switch to manual control
  //wb_robot_keyboard_enable(TIME_STEP);

  // main loop
  printf("Iniciando el ciclo de peticiones\n");
  
 // set_autodrive(false);z
  while (1) {
    
    const unsigned char *camera_image = wb_camera_get_image(camera);
    
    compute_gps_speed();
    update_display();    
    //wb_camera_save_image (camera, "/tmp/imagen.png", 100);
    //cv::WImageBuffer3_b image(cvLoadImage("/tmp/imagen.png", CV_LOAD_IMAGE_COLOR));
    IplImage* imagen=save_camera_image(camera_image);
    sensor_msgs::ImagePtr msg = sensor_msgs::CvBridge::cvToImgMsg(imagen, "bgr8");
    pub2.publish(msg);
    cvReleaseImage(&imagen );
     ros::spinOnce();

    // wb_servo_set_position(left_steer, 0);
    // wb_servo_set_position(right_steer, 0);
     wb_robot_step(TIME_STEP);
  }

  wb_robot_cleanup();

  return 0;  // ignored

}
Example #21
0
int main() {
  printf("hello from supervisor\n");
  
  const char *robot_name[ROBOTS] = {"NAO"};
  WbNodeRef node;
  WbFieldRef robot_translation_field[ROBOTS],robot_rotation_field[ROBOTS],ball_translation_field;
  //WbDeviceTag emitter, receiver;
  int i,j;
  int score[2] = { 0, 0 };
  double time = 10 * 60;    /* a match lasts for 10 minutes */
  double ball_reset_timer = 0;
  double ball_initial_translation[3] = { -2.5, 0.0324568, 0 };
  double robot_initial_translation[ROBOTS][3] = {
      {-4.49515, 0.234045, -0.0112415},
      {0.000574037, 0.332859, -0.00000133636}};
  double robot_initial_rotation[ROBOTS][4] = {
      {0.0604202, 0.996035, -0.0652942, 1.55047},
      {0.000568956, 0.70711, 0.707104, 3.14045}};
  double packet[ROBOTS * 3 + 2];
  char time_string[64];
  const double *robot_translation[ROBOTS], *robot_rotation[ROBOTS], *ball_translation;

  wb_robot_init();
  
  time_step = wb_robot_get_basic_time_step();
  
  emitter = wb_robot_get_device("emitter");
  wb_receiver_enable(emitter, time_step);
  receiver = wb_robot_get_device("receiver");
  wb_receiver_enable(receiver, time_step);


  for (i = 0; i < ROBOTS; i++) {
    node = wb_supervisor_node_get_from_def(robot_name[i]);
    robot_translation_field[i] = wb_supervisor_node_get_field(node,"translation");
    robot_translation[i] = wb_supervisor_field_get_sf_vec3f(robot_translation_field[i]);
    for(j=0;j<3;j++) robot_initial_translation[i][j]=robot_translation[i][j];
    robot_rotation_field[i] = wb_supervisor_node_get_field(node,"rotation");
    robot_rotation[i] = wb_supervisor_field_get_sf_rotation(robot_rotation_field[i]);
    for(j=0;j<4;j++) robot_initial_rotation[i][j]=robot_rotation[i][j];
  }

  node = wb_supervisor_node_get_from_def("BALL");
  ball_translation_field = wb_supervisor_node_get_field(node,"translation");
  ball_translation = wb_supervisor_field_get_sf_vec3f(ball_translation_field);
  for(j=0;j<3;j++) ball_initial_translation[j]=ball_translation[j];
  /* printf("ball initial translation = %g %g %g\n",ball_translation[0],ball_translation[1],ball_translation[2]); */
  set_scores(0, 0);

  while(wb_robot_step(TIME_STEP)!=-1) {
    //printf("supervisor commands START!\n");
    check_for_slaves_data();
    
    ball_translation = wb_supervisor_field_get_sf_vec3f(ball_translation_field);
    for (i = 0; i < ROBOTS; i++) {
      robot_translation[i]=wb_supervisor_field_get_sf_vec3f(robot_translation_field[i]);
      /* printf("coords for robot %d: %g %g %g\n",i,robot_translation[i][0],robot_translation[i][1],robot_translation[i][2]); */
      packet[3 * i]     = robot_translation[i][0];  /* robot i: X */
      packet[3 * i + 1] = robot_translation[i][2];  /* robot i: Z */

      if (robot_rotation[i][1] > 0) {               /* robot i: rotation Ry axis */
        packet[3 * i + 2] = robot_rotation[i][3];   /* robot i: alpha */
      } else { /* Ry axis was inverted */
        packet[3 * i + 2] = -robot_rotation[i][3];   
      }
    }
    packet[3 * ROBOTS]     = ball_translation[0];  /* ball X */
    packet[3 * ROBOTS + 1] = ball_translation[2];  /* ball Z */
    wb_emitter_send(emitter, packet, sizeof(packet));

    /* Adds TIME_STEP ms to the time */
    time -= (double) TIME_STEP / 1000;
    if (time < 0) {
      time = 10 * 60; /* restart */
    }
    sprintf(time_string, "%02d:%02d", (int) (time / 60), (int) time % 60);
    wb_supervisor_set_label(2, time_string, 0.45, 0.01, 0.1, 0x000000, 0.0);   /* black */

    if (ball_reset_timer == 0) {
      if (ball_translation[0] > GOAL_X_LIMIT) {  /* ball in the blue goal */
        set_scores(++score[0], score[1]);
        ball_reset_timer = 3;   /* wait for 3 seconds before reseting the ball */
      } else if (ball_translation[0] < -GOAL_X_LIMIT) {  /* ball in the yellow goal */
        set_scores(score[0], ++score[1]);
        ball_reset_timer = 3;   /* wait for 3 seconds before reseting the ball */
      }
    } else {
      ball_reset_timer -= (double) TIME_STEP / 1000.0;
      if (ball_reset_timer <= 0) {
        ball_reset_timer = 0;
        wb_supervisor_field_set_sf_vec3f(ball_translation_field, ball_initial_translation);
        for (i = 0; i < ROBOTS; i++) {
          wb_supervisor_field_set_sf_vec3f(robot_translation_field[i], robot_initial_translation[i]);
          wb_supervisor_field_set_sf_rotation(robot_rotation_field[i], robot_initial_rotation[i]);
        }
      }
    }
  }
  
  wb_robot_cleanup();

  return 0;
}
Example #22
0
static void find_and_enable_devices() {

  // camera
  CameraTop = wb_robot_get_device("CameraTop");
  CameraBottom = wb_robot_get_device("CameraBottom");
  wb_camera_enable(CameraTop, 4 * time_step);
  wb_camera_enable(CameraBottom, 4 * time_step);

  // accelerometer
  accelerometer = wb_robot_get_device("accelerometer");
  wb_accelerometer_enable(accelerometer, time_step);

  // gyro
  gyro = wb_robot_get_device("gyro");
  wb_gyro_enable(gyro, time_step);
  
  // inertial unit
  inertial_unit = wb_robot_get_device("inertial unit");
  wb_inertial_unit_enable(inertial_unit, time_step);

  // ultrasound sensors
  us[0] = wb_robot_get_device("USSensor1");
  us[1] = wb_robot_get_device("USSensor2");
  us[2] = wb_robot_get_device("USSensor3");
  us[3] = wb_robot_get_device("USSensor4");
  int i;
  for (i = 0; i < 4; i++)
    wb_distance_sensor_enable(us[i], time_step);

  // foot sensors
  fsr3d[0] = wb_robot_get_device("LFsr");
  wb_touch_sensor_enable(fsr3d[0], time_step);
  fsr3d[1] = wb_robot_get_device("RFsr");
  wb_touch_sensor_enable(fsr3d[1], time_step);

  // foot bumpers
  lfoot_lbumper = wb_robot_get_device("BumperLFootLeft");
  lfoot_rbumper = wb_robot_get_device("BumperLFootRight");
  rfoot_lbumper = wb_robot_get_device("BumperRFootLeft");
  rfoot_rbumper = wb_robot_get_device("BumperRFootRight");
  wb_touch_sensor_enable(lfoot_lbumper, time_step);
  wb_touch_sensor_enable(lfoot_rbumper, time_step);
  wb_touch_sensor_enable(rfoot_lbumper, time_step);
  wb_touch_sensor_enable(rfoot_rbumper, time_step);

  // There are 7 controlable LED groups in Webots
  leds[0] = wb_robot_get_device("ChestBoard/Led");
  leds[1] = wb_robot_get_device("RFoot/Led");
  leds[2] = wb_robot_get_device("LFoot/Led");
  leds[3] = wb_robot_get_device("Face/Led/Right");
  leds[4] = wb_robot_get_device("Face/Led/Left");
  leds[5] = wb_robot_get_device("Ears/Led/Right");
  leds[6] = wb_robot_get_device("Ears/Led/Left");
  
  // get phalanx motor tags
  // the real Nao has only 2 motors for RHand/LHand
  // but in Webots we must implement RHand/LHand with 2x8 motors
  for (i = 0; i < PHALANX_MAX; i++) {
    char name[32];
    sprintf(name, "LPhalanx%d", i + 1);
    lphalanx[i] = wb_robot_get_device(name);
    sprintf(name, "RPhalanx%d", i + 1);
    rphalanx[i] = wb_robot_get_device(name);
  }
  
  // shoulder pitch motors
  RShoulderPitch = wb_robot_get_device("RShoulderPitch");
  LShoulderPitch = wb_robot_get_device("LShoulderPitch");
  
  // shoulder pitch motors
  HeadYaw = wb_robot_get_device("HeadYaw");
  HeadPitch = wb_robot_get_device("HeadPitch");
  
  //LaserHead = wb_robot_get_device("URG-04LX-UG01");
  //wb_camera_enable(LaserHead, 4 * time_step);

  // keyboard
  //wb_robot_keyboard_enable(10 * time_step); 
}
Example #23
0
File: sup2.c Project: daydin/maze
/*
 * The call to wb_robot_step is mandatory for the function
 * supervisor_node_was_found to be able to work correctly.
 */
static void reset(void)
{
	int i;
	for(i=0; i<POP_SIZE; i++) fitness[i]=-1;
	srand(time(0));
	pF1= fopen("initPop.txt","w+");
	//pF2= fopen("real2IntGenome.txt","w+");
	//pF3= fopen("encodedPop.txt","w+");
	// Initiate the emitter used to send genomes to the experiment
	emitter = wb_robot_get_device("emittersupervisor");

	// Initiate the receiver used to receive fitness
	receiver = wb_robot_get_device("receiversupervisor");
	wb_receiver_enable(receiver, TIME_STEP);

	// Create a supervised node for the robot
	robot = wb_supervisor_node_get_from_def("EPUCK");
	assert(robot!=NULL);
	pattern=wb_supervisor_node_get_from_def("FLOOR");
	pattern_rotation = wb_supervisor_node_get_field(pattern,"rotation");
	assert(pattern!=NULL);
	assert(pattern_rotation!=NULL);


	trans_field = wb_supervisor_node_get_field(robot,"translation");
	rot_field = wb_supervisor_node_get_field(robot,"rotation");
	ctrl_field= wb_supervisor_node_get_field(robot,"controller");

	wb_robot_step(0);
	wb_robot_step(0); //this is magic

	// set the robot controller to nn
	const char *controller_name = "drive2";
	wb_supervisor_field_set_sf_string(ctrl_field,controller_name);

	//check whether robot was found
	if (wb_supervisor_node_get_type(robot) == WB_NODE_NO_NODE)
		puts("Error: node EPUCK not found!!!");

	if(EVOLVING) {
		//Open log files
		f1= fopen ("../../data/fitness.txt", "wt");
		f2= fopen ("../../data/genomes.txt", "wt");
		//pR= fopen("savePop.txt","w+");

		//initial weights randomly
		initializePopulation();
		//rtoi(); //real to int conversion before encoding
		popEncoder();


		//puts("NEW EVOLUTION");
		//puts("GENERATION 0");

		// send genomes to experiment
		resetRobotPosition();
		wb_emitter_send(emitter, (void *)pop_bin[evaluated_inds], GENOME_LENGTH*sizeof(_Bool));
		//instead save binary genomes to a file
		//puts("Genes sent.");
	}
	else {
		// testing best individual
		// Read best genome from bestgenome.txt and initialize weights.
		f3= fopen ("../../data/bestgenome.txt", "rt");
		fscanf(f3,"%d %d", &generation, &evaluated_inds);

		//TODO either read binary genome or make sure it is decoded prior to storage
		for(i=0;i<GENOME_LENGTH;i++) fscanf(f3,"%d ",&pop_bin[0][i]);

		//printf("TESTING INDIVIDUAL %d, GENERATION %d\n", evaluated_inds, generation);

		// send genomes to experiment
		resetRobotPosition();
		// wb_emitter_send(emitter, (void *)pop[0], NB_GENES*sizeof(double));
	}
	return;
}
Example #24
0
int main(int argc, const char *argv[]) {

  WbDeviceTag speaker, microphone;
  WbDeviceTag sensors[NUM_SENSORS];
  int role = UNKNOWN;
  int prev_audible = -1;
  int i, j; // for loops

  // initialize webots
  wb_robot_init();

  // determine role
  if (argc >= 2) {
    if (! strcmp(argv[1], "speaker"))
      role = SPEAKER;
    else if (! strcmp(argv[1], "microphone"))
      role = MICROPHONE;
  }

  // use speaker or microphone according to specified role
  if (role == SPEAKER)
    speaker = wb_robot_get_device("speaker");
  else if (role == MICROPHONE) {
    // we only use "mic0" in this demo
    microphone = wb_robot_get_device("mic0");
    wb_microphone_enable(microphone, TIME_STEP / 2);
  }

  // find distance sensors
  for (i = 0; i < NUM_SENSORS; i++) {
    char sensor_name[64];
    sprintf(sensor_name, "ps%d", i);
    sensors[i] = wb_robot_get_device(sensor_name);
    wb_distance_sensor_enable(sensors[i], TIME_STEP);
  }

  // main loop
  for (;;) {
    if (role == SPEAKER) {
       wb_speaker_emit_sample(speaker, SAMPLE, sizeof(SAMPLE));
    }
    else if (role == MICROPHONE) {
      const short *rec_buffer = (const short *)wb_microphone_get_sample_data(microphone);
      int numSamples =  wb_microphone_get_sample_size(microphone) / sizeof(SAMPLE[0]);
      if (rec_buffer) {
        int audible = 0;
        for (i = 0; i < numSamples; i++) {
          // warning this demo assumes no noise and therefore depends on the sound plugin configuration !
          if (rec_buffer[i] != 0)
            audible = 1;
        }

        if (audible != prev_audible) {
          printf(audible ? "I hear you now !\n" : "I can't hear you !\n");
          prev_audible = audible;
        }
      }
      else
        printf("received: nothing this time ...\n");
    }

    // read distance sensor values
    double sensor_values[NUM_SENSORS];
    for (i = 0; i < NUM_SENSORS; i++)
      sensor_values[i] = wb_distance_sensor_get_value(sensors[i]);

    // compute braitenberg collision avoidance
    double speed[2];
    for (i = 0; i < 2; i++) {
      speed[i] = 0.0;
      for (j = 0; j < NUM_SENSORS; j++)
        speed[i] += EPUCK_MATRIX[j][i] * (1 - (sensor_values[j] / RANGE));
    }

    // set the motors speed
    wb_differential_wheels_set_speed(speed[0], speed[1]);

    // simulation step
    wb_robot_step(TIME_STEP);
  }

  return 0;
}
Example #25
0
File: drive2.c Project: daydin/maze
//
// Reset the robot controller and initiate the sensors and emitter/receiver
//
static int reset()
{
	int i;
	mode =1;
	emitter = wb_robot_get_device("emitter");
	//no emitter_enable here on purpose!

	receiver = wb_robot_get_device("receiver");
	wb_receiver_enable(receiver, TIME_STEP);



	char text[5]="led0";
	for(i=0;i<NB_LEDS;i++) {
		led[i]=wb_robot_get_device(text); // get a handler to the sensor
		text[3]++; // increase the device name to "ps1", "ps2", etc.
	}

	text[0]='p';
	text[1]='s';
	text[3]='\0';

	text[2]='0';
	ps[0] = wb_robot_get_device(text); // proximity sensors
	text[2]='7';
	ps[1] = wb_robot_get_device(text); // proximity sensors
	text[2]='6';
	ps[2] = wb_robot_get_device(text); // proximity sensors
	text[2]='5';
	ps[3] = wb_robot_get_device(text);
	text[2]='4';
	ps[4] = wb_robot_get_device(text);
	text[2]='3';
	ps[5] = wb_robot_get_device(text);
	text[2]='2';
	ps[6] = wb_robot_get_device(text);
	text[2]='1';
	ps[7] = wb_robot_get_device(text);

	// Enable proximity and floor sensors
	for(i=0;i<NB_DIST_SENS;i++) {
		wb_distance_sensor_enable(ps[i],TIME_STEP);
		//printf("ps[%d] is active\n",i);
	}

	//get handles for all the floor sensors
	text[0]='f';
	text[2]='1';



	fs[0]=wb_robot_get_device(text); //note that fs[0] is a 1x1 array that holds the center floor sensor DeviceTag


	//enable the center fs just to try

	wb_distance_sensor_enable(fs[0],TIME_STEP); //enable center floor sensor
	//printf("fs[%d] is active\n",1);
	//if this sensor is active increase the fitness

	// open files for writing
	//pF1=fopen("act_in.txt","w+");
	pF2=fopen("decoded_pop.txt","w+");
//	pF3=fopen("nn_values.txt","w+");

	return 1;
}
Example #26
0
// Main function
int main(int argc, char **argv)
{
  // Initialize webots
  wb_robot_init();
  
  // GPS tick data
  int red_line_tick = 0;
  int green_circle_tick = 0;
  
  // Get robot devices
  WbDeviceTag left_wheel  = wb_robot_get_device("left_wheel");
  WbDeviceTag right_wheel = wb_robot_get_device("right_wheel");
  
  // Get robot sensors
  WbDeviceTag forward_left_sensor = wb_robot_get_device("so3");
  wb_distance_sensor_enable(forward_left_sensor, TIME_STEP);
  WbDeviceTag forward_right_sensor = wb_robot_get_device("so4");
  wb_distance_sensor_enable(forward_right_sensor, TIME_STEP);
  WbDeviceTag left_sensor = wb_robot_get_device("so1");
  wb_distance_sensor_enable(left_sensor, TIME_STEP);
  
  // Get the compass
  WbDeviceTag compass = wb_robot_get_device("compass");
  wb_compass_enable(compass, TIME_STEP);
  
  // Get the GPS data
  WbDeviceTag gps = wb_robot_get_device("gps");
  wb_gps_enable(gps, TIME_STEP);
  
  // Prepare robot for velocity commands
  wb_motor_set_position(left_wheel, INFINITY);
  wb_motor_set_position(right_wheel, INFINITY);
  wb_motor_set_velocity(left_wheel, 0.0);
  wb_motor_set_velocity(right_wheel, 0.0);
  
  
  // Begin in mode 0, moving forward
  int mode  = 0;
  
  // Main loop
  while (wb_robot_step(TIME_STEP) != -1) {
  
    // Get the sensor data
    double forward_left_value = wb_distance_sensor_get_value(forward_left_sensor);
    double forward_right_value = wb_distance_sensor_get_value(forward_right_sensor);
    double left_value = wb_distance_sensor_get_value(left_sensor);
      
    // Read compass and convert to angle
    const double *compass_val = wb_compass_get_values(compass);
    double compass_angle = convert_bearing_to_degrees(compass_val);
    
    // Read in the GPS data
    const double *gps_val = wb_gps_get_values(gps);
    
    // Debug
    printf("Sensor input values:\n");
    printf("- Forward left: %.2f.\n",forward_left_value);
    printf("- Forward right: %.2f.\n",forward_right_value);
    printf("- Right: %.2f.\n",left_value);
    printf("- Compass angle (degrees): %.2f.\n", compass_angle);
    printf("- GPS values (x,z): %.2f, %.2f.\n", gps_val[0], gps_val[2]);
    
    // Send acuator commands
    double left_speed, right_speed;
    left_speed = 0;
    right_speed = 0;
    
    // List the current modes
    printf("Mode: %d.\n", mode);
    printf("Action: ");
    
    /*
     * There are four modes for this controller.
     * They are listed as below:
     * 0: Finding initial correct angle
     * 1: Moving forward
     * 2: Wall following
     * 3: Rotating after correct point
     * 4: Finding green circle + moving on
     */
     
    // If it reaches GPS coords past the red line
    if (gps_val[2] > 8.0) {
      
      // Up the GPS tick
      red_line_tick = red_line_tick + 1;
      
    }
    
    // If the red line tick tolerance reaches
    // more than 10 per cycle, begin mode 3
    if (red_line_tick > 10) {
      mode = 3;
    }
    
    if (mode == 0) { // Mode 0: Find correct angle
    
      printf("Finding correct angle\n");
      
      if (compass_angle < (DESIRED_ANGLE - 1.0)) {
      
        // Turn right
        left_speed = MAX_SPEED;
        right_speed = 0;
      
      } else if (compass_angle > (DESIRED_ANGLE + 1.0)) {
        
        // Turn left
        left_speed = 0;
        right_speed = MAX_SPEED;
      
      } else {
      
        // Reached the desired angle, move in a straight line
        mode = 1;
      
      }
    
    } else if(mode == 1) { // Mode 1: Move forward
    
      printf("Moving forward.\n");
    
      left_speed = MAX_SPEED;
      right_speed = MAX_SPEED;
            
      // When sufficiently close to a wall in front of robot, switch mode to wall following
      if ((forward_right_value > 500) || (forward_left_value > 500)) {
        mode = 2;
      }
      
    } 
    else if (mode == 2) { // Mode 2: Wall following
        
      if ((forward_right_value > 200) || (forward_left_value > 200)) {
        printf("Backing up and turning right.\n"); 
        
        left_speed = MAX_SPEED / 4.0;
        right_speed = - MAX_SPEED / 2.0;
      }
      else {
      
        if (left_value > 300) {
          printf("Turning right away from wall.\n"); 
          
          left_speed = MAX_SPEED;
          right_speed = MAX_SPEED / 1.75;
        } 
        else {
        
          if (left_value < 200) {
            printf("Turning left towards wall.\n");
              
            left_speed = MAX_SPEED / 1.75;
            right_speed = MAX_SPEED;
          } 
          else {
            printf("Moving forward along wall.\n");
            
            left_speed = MAX_SPEED;
            right_speed = MAX_SPEED;
          } 
          
        }
        
      }
      
    } else if (mode == 3) {
    
      // Once arrived, turn to the right
      printf("Finding correct angle (again)\n");
      
      if (compass_angle < (90 - 1.0)) {
      
        // Turn right
        left_speed = MAX_SPEED;
        right_speed = MAX_SPEED / 1.75;
      
      } else if (compass_angle > (90 + 1.0)) {
        
        // Turn left
        left_speed = MAX_SPEED / 1.75;
        right_speed = MAX_SPEED;
      
      } else {
      
        // Reached the desired angle, move in a straight line
        if (green_circle_tick > 10) {
          left_speed = 0;
          right_speed = 0;
          
          
        } else {
          left_speed = MAX_SPEED;
          right_speed = MAX_SPEED;
        }
        
        if (gps_val[0] < -3.2) {
          green_circle_tick = green_circle_tick + 1;
        }
      
      }
      
    }
     
    // Set the motor speeds.
    wb_motor_set_velocity(left_wheel, left_speed);
    wb_motor_set_velocity(right_wheel, right_speed);
    
  // Perform simple simulation step
  } while (wb_robot_step(TIME_STEP) != -1);

  
  // Clean up webots
  wb_robot_cleanup();
  
  return 0;
}