| RESEARCH AND REALIZATION OF MUTUAL TRIMMING OF NURBS |
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| 作者姓名： | Shen Qingyun Zhou Laishui Zhou Rurong |
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| 作者单位： | Research Center of CAD/CAM Engineering，Nanjing University ofAeronautics and Astronautics，Nanjing，210016，China |
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| 摘 要： | Sincetheearly199Os,someCAD/CAMsystems,suchasUG1,SuperMan,havebeenbasedontrimmedsurfacesinsurfacemedelling.Fortheflexibilityandconvenienceofsurfacemodelling,mutualtrimmingbetweentwosurfacesisoftendesired,soitisnecessarytostudythetechniqueofmutualtrimmingofsurfaces.Duringrecentyears,therehadbeensomepapersontrimmedsurfacel~4JamongwhichRef.2jpresentedacomparativelycomprehensiveandsystematicintroductiontotrimmingofNURBSsurface.Nevertheless,accordingtoRef.L2],retrimmingofatrimmedsurfaceisn…
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RESEARCH AND REALIZATION OF MUTUAL TRIMMING OF NURBS |
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| Shen Qingyun, Zhou Laishui, Zhou Rurong.RESEARCH AND REALIZATION OF MUTUAL TRIMMING OF NURBS[J].Chinese Journal of Aeronautics,1997(2). |
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| Authors: | Shen Qingyun Zhou Laishui Zhou Rurong |
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| Abstract: | Since regular surface is defined by a mapping from 2-D parameter plane to 3-D space, trimming of NURBS surface is equivalent to changing a valid parameter region ofthe surface with the same mapping. In this paper, by presenting a rigid and comprehensi-ble definition of union, difference and intersection of two intersecting loops in the parame-ter region of NURBS surface, and by working out the corresponding algorithm, a rebui1d-ing algorithm of the valid parameter region of NURBS surface is obtained. |
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| Keywords: | contours surfaces computer aided design parametric surface nonuniform rational B-spline |
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