Added Sprite Swap and Horizontal flipping to character controller

scripts/CSharp/Common/Player3D.cs

@@ -6,23 +6,76 @@ public partial class Player3D : CharacterBody3D
 {
     [Export] private float _speed = 1.0f;
     [Export] private Camera3D _camera;
+    [Export] private Sprite3D _frontSprite;
+    [Export] private Sprite3D _sideSprite;
+    
+    private bool _sideFlipped;
 
     public override void _PhysicsProcess(double delta)
     {
 	    if (!IsOnFloor()) Velocity += Vector3.Down * (float) delta;
-
+	    
 	    var inputDir = Input.GetVector("move_left", "move_right", "move_up", "move_down");
+	    if (inputDir == Vector2.Zero)
+		    return; 
+		
+	    MoveOnInput(inputDir, delta);
+	    SwitchSprites(inputDir);
+    }
+
+    private void MoveOnInput(Vector2 inputDir, double delta)
+    {
 	    inputDir = inputDir.Rotated(-_camera.GlobalRotation.Y);
 	    var direction = (Transform.Basis * new Vector3(inputDir.X, 0, inputDir.Y)).Normalized();
 	    if (direction != Vector3.Zero)
-	    {
-		    Velocity = new Vector3(direction.X * _speed, Velocity.Y, direction.Z * _speed * (float) delta * Scale.X);
-	    }
+		    Velocity = new Vector3(direction.X * _speed * (float) delta * Scale.X, Velocity.Y, direction.Z * _speed * (float) delta * Scale.Z);
 	    else
-	    {
 		    Velocity = Velocity.MoveToward(new Vector3(0, 0, 0),  _speed);
-	    }
 
 	    MoveAndSlide();
     }
+
+    private void SwitchSprites(Vector2 inputDir)
+    {
+	    float X = inputDir.X;
+	    float Y = inputDir.Y;
+	    
+	    if (X == 0.0 && Y == 0.0)
+	    {
+		    ActivateFrontSprite(true);
+		    return;
+	    }
+
+	    if (X != 0)
+	    {
+		    ActivateFrontSprite(false);
+		    
+		    if (X > 0.0f)
+		    {
+			    _sideFlipped = false;
+			    _sideSprite.FlipH = _sideFlipped;
+		    }
+
+		    if (X < 0.0f)
+		    {
+			    _sideFlipped = true;
+			    _sideSprite.FlipH = _sideFlipped;
+		    }
+		    return;
+	    }
+
+	    if (Y != 0)
+	    {
+		    ActivateFrontSprite(true);
+	    }
+
+    }
+
+    private void ActivateFrontSprite(bool activate)
+    {
+	    _frontSprite.Visible = activate;
+	    _sideSprite.Visible = !activate;
+    }
+    
+    
 }