make damage label stationary and not move with game camera

core/src/main/java/io/github/com/quillraven/ui/model/GameViewModel.java

@@ -15,16 +15,16 @@ public class GameViewModel extends ViewModel {
     private final AudioService audioService;
     private int lifePoints;
     private int maxLife;
-    private final Vector2 tmpVec2;
     private Map.Entry<Vector2, Integer> playerDamage;
+    private final Vector2 tmpVec2;
 
     public GameViewModel(GdxGame game) {
         super(game);
         this.audioService = game.getAudioService();
         this.lifePoints = 0;
         this.maxLife = 0;
-        this.tmpVec2 = new Vector2();
         this.playerDamage = null;
+        this.tmpVec2 = new Vector2();
     }
 
     public void setMaxLife(int maxLife) {
@@ -58,10 +58,15 @@ public class GameViewModel extends ViewModel {
     }
 
     public void playerDamage(int amount, float x, float y) {
-        tmpVec2.set(x, y);
+        Vector2 position = new Vector2(x, y);
-        game.getViewport().project(tmpVec2);
+        this.playerDamage = Map.entry(position, amount);
-
-        this.playerDamage = Map.entry(tmpVec2, amount);
         this.propertyChangeSupport.firePropertyChange(PLAYER_DAMAGE, null, this.playerDamage);
     }
+
+    public Vector2 toScreenCoords(Vector2 position) {
+        tmpVec2.set(position);
+        game.getViewport().project(tmpVec2);
+        return tmpVec2;
+
+    }
 }

core/src/main/java/io/github/com/quillraven/ui/view/GameView.java

@@ -60,18 +60,31 @@ public class GameView extends View<GameViewModel> {
         }
     }
 
+    private Vector2 toStageCoords(Vector2 gamePosition) {
+        Vector2 resultPosition = viewModel.toScreenCoords(gamePosition);
+        stage.getViewport().unproject(resultPosition);
+        resultPosition.y = stage.getViewport().getWorldHeight() - resultPosition.y;
+        return resultPosition;
+    }
+
     /**
      * Shows animated damage text at the specified position.
      */
     private void showDamage(Map.Entry<Vector2, Integer> damAndPos) {
-        Vector2 position = damAndPos.getKey();
+        final Vector2 position = damAndPos.getKey();
         int damage = damAndPos.getValue();
-        stage.getViewport().unproject(position);
-        position.y = stage.getViewport().getWorldHeight() - position.y;
 
         TextraLabel textraLabel = new TypingLabel("[%75]{JUMP=2.0;0.5;0.9}{RAINBOW}" + damage, skin, "small");
-        textraLabel.setPosition(position.x, position.y);
         stage.addActor(textraLabel);
-        textraLabel.addAction(Actions.sequence(Actions.delay(1.25f), Actions.removeActor()));
+
+        textraLabel.addAction(
+            Actions.parallel(
+                Actions.sequence(Actions.delay(1.25f), Actions.removeActor()),
+                Actions.forever(Actions.run(() -> {
+                    Vector2 stageCoords = toStageCoords(position);
+                    textraLabel.setPosition(stageCoords.x, stageCoords.y);
+                }))
+            )
+        );
     }
 }