implement average method

remove time step
rename vtrList

app/src/main/java/de/hems/trafficsim/MainActivity.java

@@ -21,7 +21,7 @@ public class MainActivity extends AppCompatActivity implements Observer {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-        this.track = new Track(25, 100);
+        this.track = new Track(20, 100);
         this.trackView = new TrackView(this, this.track);
         this.track.addObserver(this);
         ConstraintLayout layout = (ConstraintLayout) findViewById(R.id.constr_layout);
@@ -43,6 +43,7 @@ public class MainActivity extends AppCompatActivity implements Observer {
                             + "\n";
                     ;
                 }
+                s += "Average: " + trackRef.getLastAvg();
                 TextView view = (TextView) findViewById(R.id.debugTextView);
                 view.setText(s);
                 view.invalidate();
@@ -54,7 +55,7 @@ public class MainActivity extends AppCompatActivity implements Observer {
 
     public void onStepButtonClick(View view) {
         //for (int j = 0; j < 3000; j++) {
-            this.track.timeElapse(50);
+            this.track.timeElapse();
         //}
     }
 

app/src/main/java/de/hems/trafficsim/Track.java

@@ -7,8 +7,15 @@ import java.util.Observable;
 
 public class Track extends Observable {
     protected List<Vehicle> vehicles;
-    protected List<List<VehicleTimeRecord>> vtr_list;
+    protected List<List<VehicleTimeRecord>> vtrList;
     protected float trackLength;
+    protected float sumAvgMemory;
+
+    public float getLastAvg() {
+        return lastAvg;
+    }
+
+    protected float lastAvg;
 
     public List<Vehicle> getVehicles() {
         return vehicles;
@@ -21,7 +28,9 @@ public class Track extends Observable {
     public Track(int numberVehicles, float trackLength) {
         this.trackLength = trackLength;
         this.vehicles = createVehiclesList(numberVehicles);
-        this.vtr_list = new LinkedList<>();
+        this.vtrList = new LinkedList<>();
+        this.sumAvgMemory = 0;
+        this.lastAvg = 0;
     }
 
     protected List<Vehicle> createVehiclesList(int numberVehicles){
@@ -34,7 +43,7 @@ public class Track extends Observable {
         return result;
     }
 
-    public void timeElapse(float timeStep) {
+    public void timeElapse() {
         for(int i=0; i<vehicles.size();i++) {
             Vehicle v = vehicles.get(i);
             int forerunnerIndex = i + 1;
@@ -49,15 +58,37 @@ public class Track extends Observable {
             v.updateVelocity(distanceForerunner);
         }
         List <VehicleTimeRecord> records = new ArrayList<>(vehicles.size());
-        this.vtr_list.add(records);
+        this.vtrList.add(records);
         for(Vehicle v: vehicles){
-            v.timeElapse(50);
-            VehicleTimeRecord vtr = new VehicleTimeRecord(v.id, v.position, v.curVelocity, timeStep);
+            v.timeElapse();
+            VehicleTimeRecord vtr = new VehicleTimeRecord(v.id, v.position, v.curVelocity);
             records.add(vtr);
         }
-
+        update_avg();
         this.setChanged();
         this.notifyObservers(this);
         this.clearChanged();
     }
+
+    public float avg_step(int step){
+        float sum_step = 0;
+        for (VehicleTimeRecord r : vtrList.get(step)) {
+            sum_step +=  r.velocity;
+        }
+        return sum_step / vehicles.size();
+    }
+
+    protected void update_avg(){
+        sumAvgMemory += avg_step(vtrList.size()-1);
+        lastAvg = sumAvgMemory / vtrList.size();
+    }
+
+    public float avg_span(int start, int end){
+        float sum_span = 0;
+        for (int i=start; i <end;i++){
+            sum_span += avg_step(i);
+        }
+        return sum_span / (end-start+1);
+    }
+
 }

app/src/main/java/de/hems/trafficsim/Vehicle.java

@@ -50,7 +50,7 @@ public class Vehicle {
 
     }
 
-    public void timeElapse(float timeStep) {
+    public void timeElapse() {
         position = (position + curVelocity) % this.trackLength;
     }
 

app/src/main/java/de/hems/trafficsim/VehicleTimeRecord.java

@@ -9,19 +9,13 @@ public class VehicleTimeRecord {
         return velocity;
     }
 
-    public float getTimestep() {
-        return timestep;
-    }
-
     protected int id;
     protected float position;
     protected float velocity;
-    protected float timestep;
 
-    public VehicleTimeRecord(int id, float position, float velocity, float timestep) {
+    public VehicleTimeRecord(int id, float position, float velocity) {
         this.id = id;
         this.position = position;   //needed???
         this.velocity = velocity;
-        this.timestep = timestep;
     }
 }

app/src/main/java/de/hems/trafficsim/Worker.java

@@ -16,7 +16,7 @@ public class Worker extends Thread {
     @Override
     public void run() {
         while (!stop) {
-            this.track.timeElapse(50);
+            this.track.timeElapse();
         }
     }
 }