计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (34): 26-28.
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展俊德,李锡文,史铁林
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ZHAN Junde,LI Xiwen,SHI Tielin
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摘要: 提出了一种利用控制顶点投影法计算点到平面NURBS曲线最小距离的算法。将控制顶点投影到平面NURBS曲线上,投影点将平面NURBS曲线分割成若干曲线段;计算点到各曲线段的最小距离,通过比较这些最小距离值,找出点到平面NURBS曲线的最小距离。该算法实现简单,计算精度较高,具有重要的实用价值。
关键词: 平面NURBS曲线, 最小距离, 控制顶点投影法
Abstract: The projection method of control points for calculating the minimum distance between a point and a planar NURBS curve is proposed.The control points are projected onto NURBS curve,and the projection points subdivide NURBS curve into a set of curve segments.By calculating and comparing the minimum distances between a point and these curve segments,the minimum distance between a point and NURBS curve can be found.The algorithm has the property of simple realization,high calculation precision,so it has important practical value.
Key words: planar NURBS curve, minimum distance, projection method of control points
展俊德,李锡文,史铁林. 计算点到平面NURBS曲线的最小距离 [J]. 计算机工程与应用, 2011, 47(34): 26-28.
ZHAN Junde,LI Xiwen,SHI Tielin. Calculating minimum distance between point and planar NURBS curve[J]. Computer Engineering and Applications, 2011, 47(34): 26-28.
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http://cea.ceaj.org/CN/Y2011/V47/I34/26