package Steerings;
   
   import SteeringStuff.SteeringManager;
   import SteeringStuff.SteeringTools;
   import SteeringStuff.RefBoolean;
   import SteeringProperties.SteeringProperties;
   import SteeringProperties.WallFollowingProperties;
   import SteeringStuff.IRaysFlagChanged;
   import cz.cuni.amis.pogamut.base3d.worldview.object.Location;
  import javax.vecmath.Vector3d;
  import cz.cuni.amis.pogamut.ut2004.bot.impl.UT2004Bot;
  import cz.cuni.amis.pogamut.ut2004.communication.messages.gbinfomessages.AutoTraceRay;
  import SteeringStuff.ISteering;
  import SteeringStuff.RaycastingManager;
  import SteeringStuff.SteeringRay;
  import SteeringStuff.SteeringType;
  import cz.cuni.amis.pogamut.ut2004.utils.UnrealUtils;
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.Random;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.Future;
  import java.util.logging.Level;
  import java.util.logging.Logger;
  import javax.vecmath.Tuple3d;
  
  
  /**
   * A class for providing wall following steering to bots via raycasting.
   *
   * @author Marki
   */
  public class WallFollowingSteer implements ISteering, IRaysFlagChanged {
      /** This steering needs botself, raycasting manager. */
      private UT2004Bot botself;
      private RaycastingManager rayManager;
  
      private int wallForce;
      /** Řád síly - 1-10. */
      private int orderOfTheForce;
      /**Steering properties: */
      private double attractiveForceWeight;
      /**Steering properties: */
      private double repulsiveForceWeight;
      /**Steering properties: */
      private double convexEdgesForceWeight;
      /**Steering properties: */
      private double concaveEdgesForceWeight;
      /**Steering properties: */
      private boolean justMySide;
      /**Steering properties: */
      private boolean specialDetection;
      /**Steering properties: */
      private boolean frontCollisions;
      
  
      /** ISteering properties:  distance from the wall - how far from the wall should the bot go.*/
      int DISTANCE_FROM_THE_WALL = 166;
      //How big is the value of the bot's counter when leaving a wall. (For so many ticks he is turning.)
      private static final int DEFAULTCOUNTER = 10;
      //Tento parametr je asi na pytel, páč to s ním stejně moc dobře nefunguje. Takže je jako konstanta a asi ho smažu.
      private boolean goFast = false;
  
      //Possible states of the bot - whether he's following nothing, the left hand, or the right hand.
      enum State { NOTHING, LEFT, RIGHT };
      
      
      //The bot's state.
      State state;
  
      //Counter of bot's memory, when leaving a wall (90° turns etc.).
      int counter;
  
      //Help variable to remember, when we were turning beacause of the convex edge --> we will diminish the force concave edges.
      boolean convexTurning;
      
      private boolean raysReady;
      private HashMap<String, Future<AutoTraceRay>> myFutureRays;
  
      // Constants for rays' ids
      protected static final String NLEFTFRONT = "wleftfront";
      protected static final String NLEFT = "wleft";
      protected static final String NRIGHTFRONT = "wrightfront";
      protected static final String NRIGHT = "wright";
      protected static final String NFRONT = "wfront";
  
      Random random = new Random();
      
      /**
       * Bot's rays.
       */
      AutoTraceRay nleft, nright, nleftfront, nrightfront, nfront;
  
      /**
       * Lengths of bot's rays. Short rays are supposed for side rays, long rays for nfront rays.
       */
      int shortSideRayLength;
      int shortSideFrontRayLength;
      int longSideRayLength;
     int longSideFrontRayLength;
     int shortFrontRayLength;
     int longFrontRayLength;
 
 
     /**
      *
      * @param bot Instance of the steered bot.
      * @param rayManager Raycasting manager of the steered bot.
      * @param newProperties Sets the steering properties.
      */
     public WallFollowingSteer(UT2004Bot bot, RaycastingManager rayManager, SteeringProperties newProperties) {
         botself = bot;
         this.rayManager = rayManager;
         setProperties(newProperties);   //This is not necessary.
         state = State.NOTHING;
         counter = 0;
         convexTurning = false;
         prepareRays();
     }
 
     /**
      *
      * @param bot Instance of the steered bot.
      * @param rayManager Raycasting manager of the steered bot.
      */
     public WallFollowingSteer(UT2004Bot bot, RaycastingManager rayManager) {
         botself = bot;
         this.rayManager = rayManager;
         setProperties(new WallFollowingProperties());   //This is not necessary.
         state = State.NOTHING;
         counter = 0;
         convexTurning = false;
         prepareRays();
     }
 
     //<editor-fold defaultstate="collapsed" desc="Rays">
 
     //Prepares rays for the bot, removes any old rays and sets new ones.
     private void prepareRays() {
 
         /*Délky postranních paprsků jsou 8 a 12. Délky šikmých se vynásobí 2 a předního se vynásobí odmocninou(3).*/
         int shortLength = 8;
         int longLength = 12;
 
         shortSideRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * shortLength * DISTANCE_FROM_THE_WALL / 166f);        //8
         longSideRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * longLength * DISTANCE_FROM_THE_WALL / 166f);        //12
         shortSideFrontRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * shortLength * 2 * DISTANCE_FROM_THE_WALL / 166f);  //20
         longSideFrontRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * longLength * 2 * DISTANCE_FROM_THE_WALL / 166f);   //30
         shortFrontRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * shortLength * Math.sqrt(3) * DISTANCE_FROM_THE_WALL / 166f);      //18
         longFrontRayLength = (int) (UnrealUtils.CHARACTER_COLLISION_RADIUS * longLength * Math.sqrt(3) * DISTANCE_FROM_THE_WALL / 166f);       //27
         
         //Five rays are created.
         LinkedList<SteeringRay> rayList = new LinkedList<SteeringRay>();
         rayList.add(new SteeringRay(NLEFT, new Vector3d(0, -1, 0), longSideRayLength));
         rayList.add(new SteeringRay(NLEFTFRONT, new Vector3d(Math.sqrt(3), -1, 0), longSideFrontRayLength));
         rayList.add(new SteeringRay(NRIGHTFRONT, new Vector3d(Math.sqrt(3), 1, 0), longSideFrontRayLength));
         rayList.add(new SteeringRay(NRIGHT, new Vector3d(0, 1, 0), longSideRayLength));
         rayList.add(new SteeringRay(NFRONT, new Vector3d(1, 0, 0), longFrontRayLength));
         rayManager.addRays(SteeringType.WALL_FOLLOWING, rayList, this);
         raysReady = false;
         //System.out.println("Rays wall preparation end.");
     }
 
 
     public void flagRaysChanged() {
         myFutureRays = rayManager.getMyFutureRays(SteeringType.WALL_FOLLOWING);
         raysReady = false;
         listenToRays();
     }
 
     private void listenToRays() {
         for(String rayId : myFutureRays.keySet()) {
             Future<AutoTraceRay> fr = myFutureRays.get(rayId);
             if (fr.isDone()) {
                 //System.out.println("Ray done."+rayId);
                 try {
                     if (rayId.equals(NLEFTFRONT)) {
                         nleftfront = fr.get();
                     } else if (rayId.equals(NRIGHTFRONT)) {
                         nrightfront = fr.get();
                     } else if (rayId.equals(NLEFT)) {
                         nleft = fr.get();
                     } else if (rayId.equals(NRIGHT)) {
                         nright = fr.get();
                     } else if (rayId.equals(NFRONT)) {
                         nfront = fr.get();
                     }
                     raysReady = true;
                 } catch (InterruptedException ex) {
                     Logger.getLogger(ObstacleAvoidanceSteer.class.getName()).log(Level.SEVERE, null, ex);
                 } catch (ExecutionException ex) {
                     Logger.getLogger(ObstacleAvoidanceSteer.class.getName()).log(Level.SEVERE, null, ex);
                 }
             } else {
                 //System.out.println("Ray isn't done."+rayId);
             }
         }
     }
     //</editor-fold>
     
     /**
      * When called, the bot starts steering, when possible, he walks straight, he steers away from obstacles though, when necessary.
      * If the isn't a wall, he goes straight forward.
      */
     public Vector3d run(Vector3d scaledActualVelocity, RefBoolean wantsToGoFaster, RefBoolean wantsToStop, Location focus) {
 
         //<editor-fold defaultstate="collapsed" desc="Set and init variables">
 
         wantsToGoFaster.setValue(false);
         //Supposed velocity in the next tick of logic, after applying various steering forces to the bot. If no sensor is active, it will stay as the current velocity.
         Vector3d nextVelocity = new Vector3d(0,0,0);
 
         if (!raysReady) {
             listenToRays();
             return nextVelocity;
         }
         
         //A vector from the point where one of bot's rays crosses the wall to the bot.
         Vector3d botToHitLocation;
 
         //Normal to the point, where bot's ray intersect with wall.
         Vector3d normal;
         
         //Normal vector is multiplied by this when applied to the bot.
         double multiplier;
 
         //The bot's velocity is received.
         Vector3d actualVelocity = botself.getVelocity().getVector3d();
 
         //Whether any of the former short rays is triggered - i.e. whether the bot is close to any wall. If not, he may walk at normal speed.
         boolean shortrays = false;
 
         //Whether sensors signalize the collision. (Computed in the run())
         boolean sensornLeft = false;
         boolean sensornRight = false;
         boolean sensornLeftFront = false;
         boolean sensornRightFront = false;
         boolean sensornFront = false;
         
         //The bot checks his sensors
         if (nleftfront != null)
             sensornLeftFront = nleftfront.isResult();
         if (nrightfront != null)
             sensornRightFront = nrightfront.isResult();
         if (nleft != null)
             sensornLeft = nleft.isResult();
         if (nright != null)
             sensornRight = nright.isResult();
         if (nfront != null)
             sensornFront = nfront.isResult();
 
         //</editor-fold>
 
         //<editor-fold defaultstate="collapsed" desc="Set state">
 
         //The bot may change his state.
         if (state == State.NOTHING) {
             //If the bot is in NOTHING state and he touches the wall with both of his negative side rays
             //(pleft and pleftront or pright and prightfront), he switches to the appropriate state.
             if (sensornLeft && sensornLeftFront) {
                 state = State.LEFT;
                 counter = DEFAULTCOUNTER;
             } else if (sensornRight && sensornRightFront) {
                 state = State.RIGHT;
                 counter = DEFAULTCOUNTER;
             } else if (sensornFront) {
                 if (frontCollisions) {
                     botToHitLocation = new Vector3d(nfront.getHitLocation().x - botself.getLocation().x, nfront.getHitLocation().y - botself.getLocation().y, 0);
                     normal = nfront.getHitNormal();
                     if (Math.PI - normal.angle(actualVelocity) < Math.PI/5) {   //Nějak téměř kolmo na zeď.
                         boolean turnLeft;
                         if (normal.angle(actualVelocity) == 180) {
                             turnLeft = random.nextBoolean();
                             if (SteeringManager.DEBUG) {
                                 System.out.println("Wall exactly front collision.");
                             }
                         } else {
                             turnLeft = SteeringTools.pointIsLeftFromTheVector(actualVelocity, normal);
                             if (SteeringManager.DEBUG) {
                                 System.out.println("Wall nearly front collision.");
                             }
                         }
                         if (SteeringManager.DEBUG) {
                             System.out.println("We turn left " + turnLeft);
                         }
                         Vector3d turn = SteeringTools.getTurningVector(actualVelocity, turnLeft);
                         turn.normalize();
                         turn.scale(0.5);
                         normal.add(turn);
                         normal.normalize();
                         multiplier = Math.pow(((longFrontRayLength - botToHitLocation.length()) * 2f / longFrontRayLength), orderOfTheForce);
                         normal.scale(multiplier * wallForce);
                         nextVelocity.add((Tuple3d) normal);
                         return nextVelocity;
                     }
                 }
             }
         } else if (state == State.LEFT) {
             if (sensornLeft && sensornLeftFront) {//The bot walks alongside the wall, he replenishes his counter.
                 counter = DEFAULTCOUNTER;
             }
         } else if (state == State.RIGHT) {
             if (sensornRight && sensornRightFront) {//The bot walks alongside the wall, he replenishes his counter.
                 counter = DEFAULTCOUNTER;
             }
         }
         //</editor-fold>
 
         //<editor-fold defaultstate="collapsed" desc="Just my side parameter">
 
         if (justMySide) {
             if (state.equals(State.LEFT)) {
                 sensornRight = false;
                 sensornRightFront = false;
             } else if (state.equals(State.RIGHT)) {
                 sensornLeft = false;
                 sensornLeftFront = false;
             }
         }
         //</editor-fold>
 
         //<editor-fold defaultstate="collapsed" desc="Setting the wantsToGoFaster value.">
 
         if (goFast) {
             if (sensornFront) { //If wall is in front of the bot, he shouldn't go faster.
                 wantsToGoFaster.setValue(false);
             } else {
                 wantsToGoFaster.setValue(true);
             }
         } else {
             if (!shortrays) {   //If nothing is signalling repulsively, the bot can return to its normal speed.
                 wantsToGoFaster.setValue(true);
             } else {
                 wantsToGoFaster.setValue(false);
             }
         }
         //</editor-fold>
 
         //<editor-fold defaultstate="collapsed" desc="Main ray forces of the wall">
 
         /*
          *All sensors are checked respectively. When any of them signalizes a hit, a vector is added to nextvelocity.
          *The vector added is derived from normal vector of the wall, such that when the ray is half in the wall (see multiplier),
          *the steering power is as powerful as walking power at maximal velocity.
          */
         if (sensornLeft) {
             //The force, which hauls the bot towards to the wall.
             botToHitLocation = new Vector3d(nleft.getHitLocation().x - botself.getLocation().x, nleft.getHitLocation().y - botself.getLocation().y, 0);
             normal = nleft.getHitNormal();
             multiplier = Math.pow(1 - (longSideRayLength - botToHitLocation.length()) / longSideRayLength, orderOfTheForce);
             normal.scale(attractiveForceWeight * multiplier * wallForce);
             nextVelocity.sub((Tuple3d) normal);
             //if (SteeringManager.DEBUG) System.out.println("left to "+normal.length());
 
             //When closer, the bot is pushed away from the wall by another force.
             if (botToHitLocation.length() < shortSideRayLength) {
                 shortrays = true;
                 multiplier = Math.pow(((shortSideRayLength - botToHitLocation.length()) * 2f / shortSideRayLength), orderOfTheForce);
                 normal.normalize();
                 normal.scale(repulsiveForceWeight * multiplier * wallForce);
                 nextVelocity.add((Tuple3d) normal);
                 //if (SteeringManager.DEBUG) System.out.println("left from "+normal.length());
             }
         }
 
         if (sensornRight) {
             //The force, which hauls the bot towards to the wall.
             botToHitLocation = new Vector3d(nright.getHitLocation().x - botself.getLocation().x, nright.getHitLocation().y - botself.getLocation().y, 0);
             normal = nright.getHitNormal();
             multiplier = Math.pow(1 - (longSideRayLength - botToHitLocation.length()) / longSideRayLength, orderOfTheForce);
             normal.scale(attractiveForceWeight * multiplier * wallForce);
             nextVelocity.sub((Tuple3d) normal);
             //if (SteeringManager.DEBUG) System.out.println("right to "+normal.length());
 
             //When closer, the bot is pushed away from the wall by another force.
             if (botToHitLocation.length() < shortSideRayLength) {
                 shortrays = true;
                 multiplier = Math.pow(((shortSideRayLength - botToHitLocation.length()) * 2f / shortSideRayLength), orderOfTheForce);
                 normal.normalize();
                 normal.scale(repulsiveForceWeight * multiplier * wallForce);
                 nextVelocity.add((Tuple3d) normal);
                 //if (SteeringManager.DEBUG) System.out.println("right from "+normal.length());
             }
         }
         if (sensornLeftFront) {
             //The force, which hauls the bot towards to the wall.
             botToHitLocation = new Vector3d(nleftfront.getHitLocation().x - botself.getLocation().x, nleftfront.getHitLocation().y - botself.getLocation().y, 0);
             normal = nleftfront.getHitNormal();
             multiplier = Math.pow(1 - (longSideFrontRayLength - botToHitLocation.length()) / longSideFrontRayLength, orderOfTheForce);
             normal.scale(attractiveForceWeight * multiplier * wallForce);
             nextVelocity.sub((Tuple3d) normal);
             //if (SteeringManager.DEBUG) System.out.println("left-front to "+normal.length());
 
             //When closer, the bot is pushed away from the wall by another force.
             if (botToHitLocation.length() < shortSideFrontRayLength) {
                 shortrays = true;
                 multiplier = Math.pow(((shortSideFrontRayLength - botToHitLocation.length()) * 2f / shortSideFrontRayLength), orderOfTheForce);
                 normal.normalize();
                 normal.scale(repulsiveForceWeight * multiplier * wallForce);
                 nextVelocity.add((Tuple3d) normal);
                 //if (SteeringManager.DEBUG) System.out.println("left-front from "+normal.length());
             }
 
         }
         if (sensornRightFront) {
             //The force, which hauls the bot towards to the wall.
             botToHitLocation = new Vector3d(nrightfront.getHitLocation().x - botself.getLocation().x, nrightfront.getHitLocation().y - botself.getLocation().y, 0);
             normal = nrightfront.getHitNormal();
             multiplier = Math.pow(1 - (longSideFrontRayLength - botToHitLocation.length()) / longSideFrontRayLength, orderOfTheForce);
             normal.scale(attractiveForceWeight * multiplier * wallForce);
             nextVelocity.sub((Tuple3d) normal);
             //if (SteeringManager.DEBUG) System.out.println("right-front to "+normal.length());
 
             //When closer, the bot is pushed away from the wall by another force.
             if (botToHitLocation.length() < shortSideFrontRayLength) {
                 shortrays = true;
                 multiplier = Math.pow(((shortSideFrontRayLength - botToHitLocation.length()) * 2f / shortSideFrontRayLength), orderOfTheForce);
                 normal.normalize();
                 normal.scale(repulsiveForceWeight * multiplier * wallForce);
                 nextVelocity.add((Tuple3d) normal);
                 //if (SteeringManager.DEBUG) System.out.println("right-front from "+normal.length());
             }
         }
         if (sensornFront) {
             //No attractive force in this case.
             botToHitLocation = new Vector3d(nfront.getHitLocation().x - botself.getLocation().x, nfront.getHitLocation().y - botself.getLocation().y, 0);
             normal = nfront.getHitNormal();
             //multiplier = Math.pow(1 - (longSideFrontRayLength - botToHitLocation.length()) / longSideFrontRayLength, orderOfTheForce);
             //normal.scale(multiplier * MAGNITUDE_OF_THE_FORCE);
             //nextVelocity.sub((Tuple3d) normal);
 
             //When closer, the bot is pushed away from the wall by another force.
             if (botToHitLocation.length() < shortFrontRayLength) {
                 shortrays = true;
                 multiplier = Math.pow(((shortFrontRayLength - botToHitLocation.length()) * 2f / shortFrontRayLength), orderOfTheForce);
                 normal.normalize();
                 normal.scale(repulsiveForceWeight * 3 * multiplier * wallForce);    //3 krát, aby to mělo větší vliv.
                 //if (SteeringManager.DEBUG) System.out.println("Hey front "+normal.length());
                 nextVelocity.add((Tuple3d) normal);
             }
         }
         //</editor-fold>
         
         boolean nextTurning = false;
         
         //<editor-fold defaultstate="collapsed" desc="Convex edges">
         //System.out.println("Convex turning. "+convexTurning);
         if (specialDetection) {
             if (state.equals(State.LEFT)) {
                 if ( (sensornFront && (convexTurning || (Math.abs(nfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/4)) ) ||
                    ( (sensornLeftFront && (Math.abs(nleftfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/2) && convexTurning) ||  //Pokud jsme se začali točit, tak se točíme tak dlouho, až jdeme rovnoběžně se zdí.
                      (sensornLeftFront && (Math.abs(nleftfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/4)) || //Může se stát, že přední paprsek ten roh mine, ale přesto jdeme kolmo na zeď.
                      (sensornLeft      && (Math.abs(nleft.getHitNormal().angle(actualVelocity)      - Math.PI) < Math.PI/2) && convexTurning) ) ) {
                     if (SteeringManager.DEBUG) System.out.println("Left convex edge. " + SteeringTools.radiansToDegrees(nleftfront.getHitNormal().angle(actualVelocity)));
                     if (SteeringManager.DEBUG) {
                         if (sensornFront) System.out.println("Left convex edge front collision. " + SteeringTools.radiansToDegrees(nfront.getHitNormal().angle(actualVelocity)));
                         else if (sensornLeftFront) System.out.println("Left convex edge side front. " + SteeringTools.radiansToDegrees(nleftfront.getHitNormal().angle(actualVelocity)));
                         else System.out.println("Left convex edge side. " + SteeringTools.radiansToDegrees(nleft.getHitNormal().angle(actualVelocity)));
                     }
                     //Kdykoliv když naráží přední paprsek - či pokud jsme se začali točit a zeď levého paprsku je na nás buď kolmá, či její normála svírá s naší velocity 135° - 225°.
                     nextTurning = true;
                     double k = 1;
                     if (sensornFront) {
                         k = nfront.getHitNormal().angle(actualVelocity) / Math.PI; //Jestliže jsou vektory přímo opačné, bude úhel PI a k=1. Čím je úhel menší, tím bude k menší.
                     }
                     else if (sensornLeftFront) {
                         k = 0.6*nleftfront.getHitNormal().angle(actualVelocity) / Math.PI;
                     }
                     else {
                         k = 0.3*nleft.getHitNormal().angle(actualVelocity) / Math.PI;
                     }
                     if (SteeringManager.DEBUG) {
                         System.out.println("Turning vector. " + k*SteeringTools.getTurningVector2(actualVelocity, false).length());
                     }
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, false);
                     turningVector.scale(k*convexEdgesForceWeight);
                     //nextVelocity.add(turningVector);
                     //nextVelocity = turningVector;
                     counter = DEFAULTCOUNTER;
                     convexTurning = nextTurning;
                     return turningVector;
                     //return nextVelocity;
                 }
             } else if (state.equals(State.RIGHT)) {
                 if ( (sensornFront && (convexTurning || (Math.abs(nfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/4)) ) ||
                    ( (sensornRightFront && (Math.abs(nrightfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/2) && convexTurning) ||
                      (sensornRightFront && (Math.abs(nrightfront.getHitNormal().angle(actualVelocity) - Math.PI) < Math.PI/4)) || //Může se stát, že přední paprsek ten roh mine, ale přesto jdeme kolmo na zeď.
                      (sensornRight      && (Math.abs(nright.getHitNormal().angle(actualVelocity)      - Math.PI) < Math.PI/2) && convexTurning) ) ) {
                     if (SteeringManager.DEBUG) {
                         if (sensornFront) System.out.println("Right convex edge front collision. " + SteeringTools.radiansToDegrees(nfront.getHitNormal().angle(actualVelocity)));
                         else if (sensornRightFront) System.out.println("Right convex edge side front. " + SteeringTools.radiansToDegrees(nrightfront.getHitNormal().angle(actualVelocity)));
                         else System.out.println("Right convex edge side. " + SteeringTools.radiansToDegrees(nright.getHitNormal().angle(actualVelocity)));
                     }
                     nextTurning = true;
                     double k = 1;
                     if (sensornFront) {
                         k = nfront.getHitNormal().angle(actualVelocity) / Math.PI; //Jestliže jsou vektory přímo opačné, bude úhel PI a k=1. Čím je úhel menší, tím bude k menší.
                     }
                     else if (sensornRightFront) {
                         k = 0.6*nrightfront.getHitNormal().angle(actualVelocity) / Math.PI;
                     }
                     else {
                         k = 0.3*nright.getHitNormal().angle(actualVelocity) / Math.PI;
                     }
                     if (SteeringManager.DEBUG) {
                         System.out.println("Turning vector. " + k*SteeringTools.getTurningVector2(actualVelocity, true).length());
                     }
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, true);
                     turningVector.scale(k*convexEdgesForceWeight);
                     //nextVelocity.add(turningVector);
                     //nextVelocity = turningVector;
                     counter = DEFAULTCOUNTER;
                     convexTurning = nextTurning;
                     return turningVector;
                     //return nextVelocity;
                 }
             }
         } else {    //Basic solution of the convex edges. Convex edge <==> the front and sideFront ray hits.
                     //If the convex edge is detected, the exactly turning vector is returned.
             if (state == State.LEFT) {
                 if (sensornLeftFront && sensornFront) {    //This means the concave edge. We must turn right.
                     //if (counter > 0) {
                     //counter--;
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, false);
                     turningVector.scale(convexEdgesForceWeight*0.8);
                     return turningVector;
                     /*} else {
                         state = State.NOTHING;
                     }*/
                 }
             } else if (state == State.RIGHT) {
                 if (sensornRightFront && sensornFront) {    //This means the concave edge. We must turn left.
                     //if (counter > 0) {
                     //counter--;
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, true);
                     turningVector.scale(convexEdgesForceWeight*0.8);
                     return turningVector;
                     /*} else {
                         state = State.NOTHING;
                     }*/
                 } 
             }
         }
        
 
         //</editor-fold>
 
         //<editor-fold defaultstate="collapsed" desc="Concave edges">
 
         //If the concave edge is detected, the exactly turning vector is returned.
 
         if (state == State.LEFT) {
             if (!sensornLeft && !sensornLeftFront) {//He left the wall completely, no sensor on the left side works. That is for turning around >=90°(& <=270° :-)) angles when he needs to "remember" that he should turn.
                 if (SteeringManager.DEBUG) System.out.println("counter "+counter);
                 if (counter > 0) {
                     counter--;
                     if (SteeringManager.DEBUG) System.out.println("Left concave edge. ");
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, true);
                     if (convexTurning) turningVector.scale(0.5);
                     turningVector.scale(concaveEdgesForceWeight*0.8);
                     return turningVector;
                 } else {
                     state = State.NOTHING;
                 }
             }
         } else if (state == State.RIGHT) {
             if (!sensornRight && !sensornRightFront) {//He left the wall completely, no sensor on the left side works. That is for turning around >=90°(& <=270° :-)) angles when he needs to "remember" that he should turn.            {
                 if (SteeringManager.DEBUG) System.out.println("counter "+counter);
                 if (counter > 0) {
                     counter--;
                     if (SteeringManager.DEBUG) System.out.println("Right concave edge. ");
                     Vector3d turningVector = SteeringTools.getTurningVector2(actualVelocity, false);
                     if (convexTurning) turningVector.scale(0.5);
                     turningVector.scale(concaveEdgesForceWeight*0.8);
                     return turningVector;
                     //nextVelocity.add(SteeringTools.getTurningVector(actualVelocity, false));
                     //nextVelocity = SteeringTools.getTurningVector(actualVelocity, false);
                 } else {
                     state = State.NOTHING;
                 }
             }
         }
         //</editor-fold>
 
         convexTurning = nextTurning;
         return nextVelocity;
     }
 
     @Override
     public void setProperties(SteeringProperties newProperties) {
         this.wallForce = ((WallFollowingProperties)newProperties).getWallForce();
         this.orderOfTheForce = ((WallFollowingProperties)newProperties).getOrderOfTheForce();
         this.attractiveForceWeight = ((WallFollowingProperties)newProperties).getAttractiveForceWeight();
         this.repulsiveForceWeight = ((WallFollowingProperties)newProperties).getRepulsiveForceWeight();
         this.concaveEdgesForceWeight = ((WallFollowingProperties)newProperties).getConcaveEdgesForceWeight();
         this.convexEdgesForceWeight = ((WallFollowingProperties)newProperties).getConvexEdgesForceWeight();
         this.justMySide = ((WallFollowingProperties)newProperties).isJustMySide();
         this.specialDetection = ((WallFollowingProperties)newProperties).isSpecialDetection();
         this.frontCollisions = ((WallFollowingProperties)newProperties).isFrontCollisions();
     }
 
     public WallFollowingProperties getProperties() {
         WallFollowingProperties properties = new WallFollowingProperties();
         properties.setWallForce(wallForce);
         properties.setOrderOfTheForce(orderOfTheForce);
         properties.setAttractiveForceWeight(attractiveForceWeight);
         properties.setRepulsiveForceWeight(repulsiveForceWeight);
         properties.setConcaveEdgesForceWeight(concaveEdgesForceWeight);
         properties.setConvexEdgesForceWeight(convexEdgesForceWeight);
         properties.setJustMySide(justMySide);
         properties.setSpecialDetection(specialDetection);
         properties.setFrontCollisions(frontCollisions);
         return properties;
     }
 }