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                ![](http://www.rhinostudio.cn/files/course/2019/01-04/17451284031b462813.jpg) ## **Domian2二維區間** 想象一下,一根直線,起點是0終點是1,在0 to 1的范圍內有無數個點,所以這個直線上的點我們可以通過一維區間來表示,那,一個面呢?那就需要二維了,所以這里的區間有兩個,你可以參照xy坐標來理解,而且uv是nurbs理論的基礎,所有的nurbs曲面都是一個空間二維坐標系,用uv表示兩個軸。對這個不了解的,可以先看一下鹿神的PPT: [大鹿】nurbs基礎-配合alias官方文檔學習](http://www.rhinostudio.cn/course/1341) 當然,這里的話你就知道它是個二維區間就ok。
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