you can see the length of the wall you're drawing

core/src/com/trs/game/Controller.java

@@ -138,6 +138,14 @@ public class Controller extends ApplicationAdapter implements InputProcessor {
 				polygonSpriteBatch.begin();
 				poly2.draw(polygonSpriteBatch);
 				polygonSpriteBatch.end();
+
+				renderer.end();
+				batch.begin();
+				font.setColor(Color.BLACK);
+				if(model.getCurrentLength()!=0)font.draw(batch, ""+model.getCurrentLength(), Gdx.input.getX()+10, GAME_WORLD_HEIGHT - Gdx.input.getY()+10);
+				batch.end();
+
+				renderer.begin(ShapeRenderer.ShapeType.Filled);
 			}
 			//
 			renderer.end();

core/src/com/trs/game/model/Model.java

@@ -14,6 +14,7 @@ public class Model {
     private Polygon tempPolygon;
     private Vector2 tempStart;
     private boolean drawing = false;
+    private int currentLength;
 
     private int leftWallLength = 2500;
 
@@ -45,6 +46,7 @@ public class Model {
         if(drawing){
             double angle = StaticMath.calculateAngle(x,y,(int)tempStart.x,(int)tempStart.y);
             tempPolygon = StaticMath.createPolygon((int)tempStart.x, (int)tempStart.y, angle-Math.PI,10,Vector2.dst(tempStart.x,tempStart.y,x,y));
+            currentLength = (int)Vector2.dst(tempStart.x,tempStart.y,x,y);
         }
     }
     public void finishWall(int x, int y){
@@ -77,6 +79,7 @@ public class Model {
         tempPolygon = null;
         tempStart = null;
         drawing = false;
+        currentLength = 0;
     }
 
 
@@ -99,4 +102,8 @@ public class Model {
     public int getLeftWallLength() {
         return leftWallLength;
     }
+
+    public int getCurrentLength() {
+        return currentLength;
+    }
 }