Add rounding compensation while rendering track

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

@@ -5,7 +5,6 @@ import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.view.View;
-import android.view.ViewGroup;
 
 import java.util.ConcurrentModificationException;
 import java.util.List;
@@ -14,6 +13,7 @@ public class TimeRecordView extends View {
     protected Paint paint;
     protected Track track;
     protected int pixelPerVehicle;
+    protected float tooShortPerTrackLength;
 
     public TimeRecordView(Context context, Track track) {
         super(context);
@@ -23,6 +23,7 @@ public class TimeRecordView extends View {
         paint.setStyle(Paint.Style.FILL_AND_STROKE);
         this.setBackgroundColor(Color.BLACK);
         this.pixelPerVehicle = (int) (this.getWidth() / this.track.getTrackLength());
+        this.tooShortPerTrackLength = (this.getWidth() - this.pixelPerVehicle*this.track.getTrackLength())/this.track.getTrackLength();
     }
 
     protected int getColor(float curVelocity, float maxVelocity) {
@@ -52,6 +53,7 @@ public class TimeRecordView extends View {
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
         this.pixelPerVehicle = (int) (this.getWidth() / this.track.getTrackLength());
+        this.tooShortPerTrackLength = (this.getWidth() - this.pixelPerVehicle*this.track.getTrackLength())/this.track.getTrackLength();
     }
 
     @Override
@@ -64,8 +66,9 @@ public class TimeRecordView extends View {
                 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, y, left + this.pixelPerVehicle - 1,
+                    canvas.drawRect(left+compensate, y, left + this.pixelPerVehicle - 1+compensate,
                             y + 10, this.paint);
                     i++;
                 }