角色动画在d3d的顶点向量的实现方法，下面的英文描述是文章内的，就不做中文描述了。-With the introduction of vertex shaders to modern graphics hardware, we are able to move a large portion of the character animation processing from the CPU to the graphics hardware. Two common character animation techniques are tweening (also known as morphing) and skinning (also called skeletal animation). This chapter describes how both of these techniques and some related variations can be performed using vertex shaders. We will also talk about how to combine animation with the per-pixel lighting techniques described in the introductory chapter [Engel]. We will conclude with a discussion of some geometry decompression techniques, which allow an application to minimize memory usage and memory bandwidth.