Adding robots to the game and the ability to click on them

Scripts/Camera3d.cs

@@ -36,4 +36,42 @@ public partial class Camera3d : Camera3D
 			Position = new Vector3(Position.X, 10 - visibleLayer * 4, Position.Z);
 		}
 	}
+
+	public override void _Input(InputEvent @event)
+	{
+		if (@event is InputEventMouseButton mouse &&
+			mouse.ButtonIndex == MouseButton.Left &&
+			mouse.Pressed)
+		{
+			var camera = GetViewport().GetCamera3D();
+
+			Vector2 mousePos = mouse.Position;
+
+			Vector3 from = camera.ProjectRayOrigin(mousePos);
+			Vector3 to = from + camera.ProjectRayNormal(mousePos) * 1000f;
+
+			var spaceState = GetWorld3D().DirectSpaceState;
+
+			var query = PhysicsRayQueryParameters3D.Create(from, to);
+
+			query.CollisionMask = 1 << 1;
+
+			var result = spaceState.IntersectRay(query);
+
+			if (result.Count > 0)
+			{
+				Variant colliderVariant = result["collider"];
+
+				Node hit = colliderVariant.As<Node>();
+
+				GD.Print($"Clicked robot: {hit.Name}");
+
+				// Optional: call method on robot
+				if (hit is Node robot)
+				{
+					robot.Call("OnClicked");
+				}
+			}
+		}
+	}
 }