时间控制是指：生成了n张图片帧用了多少时间m。帧率等于n/m。对应于头文件，m等于scale, n等于rate.为了精确，采用微秒计时。
I am us开发者_如何学编程ing C# 4.0, how can I avoid the problem of writing lots of similiar methods because they are each parameter-unique (how can the new parameter features avoid overload hell?).
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