Made bounding volume handing part of SceneNodes

Former-commit-id: d09d06ac4515ce09aa16fd92dd045c2a06730a99

examples/FirstScene/main.cpp

@@ -225,6 +225,11 @@ int main()
 	bool smoothMovement = true;
 	NzVector3f targetPos = camera.GetPosition();
 
+	NzTextSprite text;
+	text.SetParent(scene);
+	text.Update(NzSimpleTextDrawer::Draw("Hello world !", 72));
+	text.Scale(0.1f);
+
 	// Début de la boucle de rendu du programme
 	while (window.IsOpen())
 	{