The only requirement is that vertex buffers used for software vertex processing must be allocated in system memory.
唯一的要求是用于软件顶点处理的顶点缓存必须在系统内存中分配。
One thing to remember: locks are very costly, always look to things like matrices before locking your vertex buffers.
记得一点：锁定是非常昂贵的，在你锁定你的顶点缓冲之前，总是先看看象矩阵这样的东西。
One thing to remember: locks are very costly, always look to things like matrices before locking your vertex buffers.
记得一点：锁定是非常昂贵的，在你锁定你的顶点缓冲之前，总是先看看象矩阵这样的东西。
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