曲面快速重建.ppt

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1、曲面快速重建QuickSurfaceReconstructionCATIA逆向工程（2）1江达公司用户界面2江达公司数字模型创建FreeFormsurfaces拉伸曲面修剪一般过程倒角3江达公司数字模型Identifymechanicalfeatures一般过程（另1）4江达公司CreateScansCreateCurvesProcesscurves一般过程(另2)Createsurfaces5江达公司创建Scans－使用曲率分析DefinethecurvatureorradiusvalueorselectapointofthepolygonDefinetheanalysi

2、stypeIso-curvaturedisplayReal-timedisplayofcurvaturevalueatcursorpositionThisfunctioncreatesscanscomposedofthepointswherethecurvatureorcurvatureradiusofthepolygonhasagivenvalue6江达公司创建Scans－使用曲率分析(2/3)DefineafilteringvalueFilteringvaluesetto500Filteringvaluesetto07江达公司创建Scans－使用曲率分析(3/3)Spl

3、itofthepolygonebytheisocurvaturescansCreationofisocurvaturescans8江达公司Usingisoslopecomputation(1/2)DefinetheanglevalueDefinethecompassorientationThisfunctioncreatesscanscomposedofthepointswherenormaltothepolygonhasagivenanglewiththecompassdirection.9江达公司Usingisoslopecomputation(2/2)Creation

4、oftheisoslopescanSplitofthepolygonbytheisoslopescan10江达公司创建曲线修整scans创建3D曲线修剪不相交曲线清理轮廓11江达公司修整scans(1/2)定义精度DefinemanuallysplittingpointsonthescanDefinetheorderofeachcurve’sspan通过修整scan创建曲线DefinethemaximumnumberofspansforeachcurveDefineasmoothingfactorifnecessaryDefineananglevalueforautomat

5、icsplitting12江达公司修整scansscans(2/2)DefinethecontinuitylevelbetweentwoconsecutivecurvesRemoveasplittingpoint13江达公司Creatinga3Dcurve(1/3)Definecreationoption:SelectpointsonthecloudConstraintpointtosnapitonthedigitAddapointRemoveapoint14江达公司Creatinga3Dcurve(2/3)Movethemanipulatortodefinetheconn

6、ectionpointifthecurve’spointisonanothercurve.Activatethetangencydefinitionatapoint15江达公司Creatinga3Dcurve(3/3)DefinethetangencydirectionatapointusingthegreencirclesMakethecurvetangenttotheneighbourcurve16江达公司TrimmingnonintersectingcurvesSelectthecurvestoprocess(Curvesmustnotneedextrapolatio

7、ntofindanintersection)DefinethemaximumdistancebetweentwocurvestoconsideranintersectionDefinethemaximumlengthofthecreatedcurves(optional)17江达公司CleaningcontourSelectthecurvestoprocessImposethefunctiontocreateaclosedcontourifnecessaryActivatethetangencycontinuity