演示如何使用一个点光源与D3DX对象。你可以轨道现场使用向左箭头和向右箭头键。此外你可以提高相机的上箭头$r键和$l下箭头$r键。-Demonstrates how to use a point light with D3DX object. You can track the site using the left and right arrow keys. In addition, you can improve the camera UP and DOWN arrow keys.