nurbs
代码说明：
强大的nurbs的工具箱 nurbs曲线，曲面，造型(Toolbox nurbs powerful nurbs curve, surface, shape)
文件列表：
nurbs
.....\basisfun.m
.....\bspdegelev.m
.....\bspderiv.m
.....\bspeval.m
.....\bspkntins.m
.....\Contents.m
.....\deg2rad.m
.....\demo4surf.m
.....\democirc.m
.....\democoons.m
.....\democurve.m
.....\democylind.m
.....\demodegelev.m
.....\demodercrv.m
.....\demodersrf.m
.....\demoellip.m
.....\demoextrude.m
.....\demogeom.m
.....\demohelix.m
.....\demokntins.m
.....\demoline.m
.....\demorect.m
.....\demorevolve.m
.....\demoruled.m
.....\demos.m
.....\demosurf.m
.....\demotorus.m
.....\findspan.m
.....\nrb4surf.m
.....\nrbcirc.m
.....\nrbcoons.m
.....\nrbcylind.m
.....\nrbdegelev.m
.....\nrbderiv.m
.....\nrbdeval.m
.....\nrbeval.m
.....\nrbextrude.m
.....\nrbkntins.m
.....\nrbline.m
.....\nrbmak.m
.....\nrbplot.m
.....\nrbrect.m
.....\nrbreverse.m
.....\nrbrevolve.m
.....\nrbruled.m
.....\nrbtestcrv.m
.....\nrbtestsrf.m
.....\nrbtform.m
.....\nrbtransp.m
.....\rad2deg.m
.....\vecangle.m
.....\veccross.m
.....\vecdot.m
.....\vecmag.m
.....\vecmag2.m
.....\vecnorm.m
.....\vecrotx.m
.....\vecroty.m
.....\vecrotz.m
.....\vecscale.m
.....\vectrans.m
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