此示例说明了如何使用vrGeometry的。它定义类MyApp，这是从vrApp派生，并覆盖vrApp:: onKeyInput（）方法，以便下面描述的键盘输入。该示例显示了如何使用生成四边形和tristrips两个简单的纹理箱的几何形状。-This example shows how to use vrGeometry s. It defines the class MyApp, which is derived from vrApp and cover vrApp :: onKeyInput () method, as described below in order to keyboard input. This example shows how to use the generated quadrilateral and tristrips two simple textures tank geometry.