private void loop(){
		try{
			// `惋[v
			while (!window.isCloseRequested()){
				// ^Cg̍XV
				String title =  "fps:";
				double fps = window.getFPS();
				title += String.format("%.3f",fps);
				title += "  ver:"+glGetString(GL_VERSION);
				window.setTitle(title);

				// 
				pollEvent();
				// 
				model.step();
				// `
				window.draw(model.getDrawables());
				
				// fpsێ
				window.sync(60);
			}
		} catch(Exception e) {
			e.printStackTrace();
		} finally {
			window.destroy();
		}
	}