Method materialID

tutorials/common/tutorial/scene.cpp:32–39

  }

  unsigned TutorialScene::materialID(Ref<SceneGraph::MaterialNode> material) 
  {
    if (material->id == -1) {
      materials.push_back(material);
      material->id = unsigned(materials.size()-1);
    }
    return material->id;
  }
  
  void TutorialScene::print_camera_names ()
  {