创建一个简单的3D机房视图。该程序只显示了一个3D视图，并显示了一个3D立方体物体。3D视图可以通过鼠标的滚轮、拖拽等方式进行缩放、平移等操作。-Create a simple 3D room view. The program only shows a 3D view, and displays a 3D cube objects. 3D view by mouse wheel, drag, etc. zoom, pan, and other operations.

实现鼠标拖拽 模型放大缩小旋转功能 同时还有缓动功能-Drag the mouse model to achieve zoom function as well as easing the rotation function