Aiming at the lack of traditional ploting method in the areas of three dimension graphics , the b - spline surface is adopted . in order to more easily build the b - spline surface the control points are replaced with one center point during the storage , and make it clear to simulate the curve of branches 在三維圖形的繪制方面,針對(duì)傳統(tǒng)繪制方法的不足,采用b樣條曲面來(lái)構(gòu)造三維幾何模型,在曲面的生成及存儲(chǔ)過(guò)程中用一個(gè)中心點(diǎn)代替多個(gè)控制頂點(diǎn),將對(duì)曲面的控制轉(zhuǎn)為對(duì)曲線的控制,使得對(duì)枝條形狀的模擬更加方便直觀,并且減少了存儲(chǔ)空間。