chris/TrafficSim
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Add history length constant

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Optimize view update
Add semaphore to TimeRecordList
Add waiting timer to model update
This commit is contained in:
Loch Christian (uib05376) 2020-11-12 21:18:29 +01:00
parent 457c9662c3
commit 05fe67bc12
4 changed files with 55 additions and 16 deletions
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22
app/src/main/java/de/hems/trafficsim/MainActivity.java
View File

@ -18,6 +18,7 @@ public class MainActivity extends AppCompatActivity implements Observer, SeekBar
public static final float defaultBrakeProb = 0.3f;
public static final float defaultMaxVelocity = 5.0f;
public static final int defaultDelay = 0;
public static final int defaultHistoryLength = 50;
protected Track track;
protected TimeRecordView trackView;
protected Worker worker;
@ -28,9 +29,11 @@ public class MainActivity extends AppCompatActivity implements Observer, SeekBar
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.track = new Track(defaultNoOfVehicles, defaultTrackLength, defaultBrakeProb,
defaultMaxVelocity, defaultDelay);
defaultMaxVelocity, defaultDelay, defaultHistoryLength);
this.track.addObserver(this);
this.viewStack = (LinearLayout) findViewById(R.id.trackViewStack);
this.trackView = new TimeRecordView(this, track, defaultHistoryLength);
viewStack.addView(this.trackView);
SeekBar trackLengthSeekBar = (SeekBar) findViewById(R.id.trackLengthSeekBar);
trackLengthSeekBar.setOnSeekBarChangeListener(this);
@ -73,18 +76,22 @@ public class MainActivity extends AppCompatActivity implements Observer, SeekBar
final TextView overallAvgView = (TextView) findViewById(R.id.avgVeloOverallView);
final TextView delayedAvgView = (TextView) findViewById(R.id.delayedAvgTextView);
final TextView stepsView = (TextView) findViewById(R.id.stepsTextView);
final TimeRecordView view = this.trackView;
runOnUiThread(new Runnable() {
@Override
public void run() {
TimeRecordView newTrView = new TimeRecordView(mainActivity, trackRef);
if (viewStackRef.getChildCount() > 0)
viewStackRef.removeViewAt(0);
viewStackRef.addView(newTrView);
//TimeRecordView newTrView = new TimeRecordView(mainActivity, trackRef);
trackView.invalidate();
//if (viewStackRef.getChildCount() > 0)
// viewStackRef.removeViewAt(0);
//viewStackRef.addView(newTrView);
lastAvgView.setText(String.valueOf(round(trackRef.getLastAvg(), 2)));
overallAvgView.setText(String.valueOf(round(trackRef.getOverallAvg(), 2)));
stepsView.setText(String.valueOf(trackRef.getVtrList().size()));
stepsView.setText(String.valueOf(trackRef.getSteps()));
delayedAvgView.setText(String.valueOf(round(trackRef.getDelayedAvg(), 2)));
}
});
}
@ -172,7 +179,8 @@ public class MainActivity extends AppCompatActivity implements Observer, SeekBar
int newDelay = ((SeekBar)(findViewById(R.id.simDelaySeekBar))).getProgress();
this.track = new Track(newNoOfVehicles, newTrackLength, newBrakeProb, newMaxVelocity, newDelay);
this.track = new Track(newNoOfVehicles, newTrackLength, newBrakeProb, newMaxVelocity, newDelay, defaultHistoryLength);
this.trackView.setTrack(this.track);
this.track.addObserver(this);
if (this.worker != null) { // There was a simulation running already
this.stopWorker();

19
app/src/main/java/de/hems/trafficsim/TimeRecordView.java
View File

@ -14,11 +14,13 @@ public class TimeRecordView extends View {
protected Track track;
protected int pixelPerVehicle;
protected float tooShortPerTrackLength;
protected int historyLength;
public TimeRecordView(Context context, Track track) {
public TimeRecordView(Context context, Track track, int historyLength) {
super(context);
this.track = track;
this.paint = new Paint();
this.historyLength = historyLength;
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
this.setBackgroundColor(Color.BLACK);
@ -26,6 +28,10 @@ public class TimeRecordView extends View {
this.tooShortPerTrackLength = (this.getWidth() - this.pixelPerVehicle*this.track.getTrackLength())/this.track.getTrackLength();
}
public void setTrack(Track track) {
this.track = track;
}
protected int getColor(float curVelocity, float maxVelocity) {
float perc = curVelocity / maxVelocity;
perc = 1 - perc;
@ -60,18 +66,25 @@ public class TimeRecordView extends View {
protected void onDraw(Canvas canvas) {
int y = 0;
List<List<VehicleTimeRecord>> stepList = this.track.getVtrList();
for (int curStepIdx = stepList.size()-1; curStepIdx >= stepList.size()-1-50 && curStepIdx >= 0; curStepIdx--) {
for (int curStepIdx = this.historyLength-1;
curStepIdx >= 0 && stepList.size() >= curStepIdx;
curStepIdx--) {
try {
try {
track.getListSemaphore().acquire();
} catch (InterruptedException ex) { return; }
List<VehicleTimeRecord> step = stepList.get(curStepIdx);
int i = 0;
for (VehicleTimeRecord r : step) {
int left = (int) (this.pixelPerVehicle * r.getPosition());
int compensate = Math.round(r.getPosition()*this.tooShortPerTrackLength);
this.paint.setColor(getColor(r.getVelocity(), r.getMaxVelocity()));
canvas.drawRect(left+compensate, y, left + this.pixelPerVehicle - 1+compensate,
canvas.drawRect(left+compensate, y,
left + this.pixelPerVehicle - 1+compensate,
y + 10, this.paint);
i++;
}
track.getListSemaphore().release();
y += 10;
} catch (ConcurrentModificationException ex) {
System.out.println("Concurrent Exception occured, skipping record");

29
app/src/main/java/de/hems/trafficsim/Track.java
View File

@ -4,6 +4,8 @@ import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Observable;
import java.util.concurrent.Semaphore;
import java.util.concurrent.locks.LockSupport;
public class Track extends Observable {
protected List<Vehicle> vehicles;
@ -18,6 +20,8 @@ public class Track extends Observable {
protected int waitTime;
protected float maxVelocity;
protected float brakeProb;
protected long steps;
protected Semaphore listSemaphore;
public List<List<VehicleTimeRecord>> getVtrList() { return vtrList; }
public float getOverallAvg() {
@ -33,8 +37,10 @@ public class Track extends Observable {
public float getTrackLength() {
return trackLength;
}
public long getSteps() { return steps; }
public Semaphore getListSemaphore() { return listSemaphore; }
public Track(int numberVehicles, float trackLength, float brakeProb, float maxVelocity, int waitTime) {
public Track(int numberVehicles, float trackLength, float brakeProb, float maxVelocity, int waitTime, int historyLength) {
this.trackLength = trackLength;
this.brakeProb = brakeProb;
this.maxVelocity = maxVelocity;
@ -45,8 +51,10 @@ public class Track extends Observable {
this.overallAvg = 0;
this.delayedAvg = 0;
this.lastAvg = 0;
this.historyLength = 25;
this.historyLength = historyLength;
this.waitTime = waitTime;
this.steps = 0;
this.listSemaphore = new Semaphore(1);
}
@ -90,17 +98,28 @@ public class Track extends Observable {
}
v.updateVelocity(distanceForerunner);
}
try {
this.listSemaphore.acquire();
} catch (InterruptedException ex) {return;}
List <VehicleTimeRecord> records = new ArrayList<>(vehicles.size());
this.vtrList.add(records);
if (this.vtrList.size() > this.historyLength) {
this.vtrList.remove(0);
}
for(Vehicle v: vehicles){
v.timeElapse();
VehicleTimeRecord vtr = new VehicleTimeRecord(v.id, v.position, v.curVelocity, v.maxVelocity);
records.add(vtr);
}
steps++;
this.listSemaphore.release();
update_avg();
this.setChanged();
this.notifyObservers();
this.clearChanged();
LockSupport.parkNanos(1);
try {
Thread.sleep(waitTime);
} catch (InterruptedException ex) { }
@ -116,12 +135,12 @@ public class Track extends Observable {
protected void update_avg(){
lastAvg = avg_step(vtrList.size()-1);
if (this.vtrList.size() > 10) {
if (this.steps > 10) {
sumDelAvgMemory += lastAvg;
delayedAvg = sumDelAvgMemory / (vtrList.size() - 10);
delayedAvg = sumDelAvgMemory / (this.steps - 10);
}
sumAvgMemory += lastAvg;
overallAvg = sumAvgMemory / vtrList.size();
overallAvg = sumAvgMemory / this.steps;
}

1
app/src/main/java/de/hems/trafficsim/Vehicle.java
View File

@ -46,7 +46,6 @@ public class Vehicle {
curVelocity = curVelocity + 1;
}
if (r < brakeProb && curVelocity > 0) {
System.out.println("vehicle: "+brakeProb);
curVelocity = curVelocity - 1;
}
if (curVelocity > distanceForerunner) {