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Quick Surface ReconstructionVersion 5 Release 16Quick Surface ReconstructionUser's GuideVersion 5 Release 16Page 1

Version 5 Release 16Quick Surface ReconstructionPage 2Special NoticesCATIA is a registered trademark of Dassault Systèmes.Protected by one or more U.S. Patents number 5,615,321; 5,774,111; 5,821,941; 5,844,566; 6,233,351;6,292,190; 6,360,357; 6,396,522; 6,459,441; 6,499,040; 6,545,680; 6,573,896; 6,597,382; 6,654,011;6,654,027; 6,717,597; 6,745,100; 6,762,778; 6,828,974 other patents pending.DELMIA is a registered trademark of Dassault Systèmes.ENOVIA is a registered trademark of Dassault Systèmes.SMARTEAM is a registered trademark of SmarTeam Corporation Ltd.Any of the following terms may be used in this publication. These terms are trademarks of:JavaSun Microsystems Computer CompanyOLE, VBScript for Windows, Visual BasicMicrosoft CorporationIMSpostIntelligent Manufacturing Software, Inc.All other company names and product names mentioned are the property of their respective owners.Certain portions of this product contain elements subject to copyright owned by the following entities:Copyright Dassault SystemesCopyright Dassault Systemes of AmericaCopyright D-Cubed Ltd., 1997-2000Copyright ITI 1997-2000Copyright Cenit 1997-2000Copyright Mental Images Gmbh & Co KG, Berlin/Germany 1986-2000Copyright Distrim2 Lda, 2000Copyright Institut National de Recherche en Informatique et en Automatique (INRIACopyright Compaq Computer CorporationCopyright Boeing CompanyCopyright IONA Technologies PLCCopyright Intelligent Manufacturing Software, Inc., 2000Copyright SmarTeam Corporation LtdCopyright Xerox Engineering SystemsCopyright Bitstream Inc.Copyright IBM Corp.Copyright Silicon Graphics Inc.Copyright Installshield Software Corp., 1990-2000Copyright Microsoft CorporationCopyright Spatial Corp.Copyright LightWork Design Limited 1995-2000Copyright Mainsoft Corp.Copyright NCCS 1997-2000Copyright Weber-Moewius, D-SiegenCopyright Geometric Software Solutions Company Limited, 2001Copyright Cogito Inc.Copyright Tech Soft AmericaCopyright LMS International 2000, 2001

Quick Surface ReconstructionVersion 5 Release 16Page 3Raster Imaging Technology copyrighted by Snowbound Software Corporation 1993-2001CAM-POST Version 2001/14.0 ICAM Technologies Corporation 1984-2001. All rights reservedThe 2D/2.5D Display analysis function, the MSC.Nastran interface and the ANSYS interface are based on LMSInternational technologies and have been developed by LMS InternationalImpactXoft, IX Functional Modeling, IX Development, IX, IX Design, IXSPeeD, IX Speed Connector, IX AdvancedRendering, IX Interoperability Package, ImpactXoft Solver are trademarks of ImpactXoft. Copyright 20012002 ImpactXoft. All rights reserved.This software contains portions of Lattice Technology, Inc. software. Copyright 1997-2004 LatticeTechnology, Inc. All Rights Reserved.Copyright 2005, Dassault Systèmes. All rights reserved.

Quick Surface ReconstructionVersion 5 Release 16Quick Surface ReconstructionOverviewWhat's New?Getting StartedStarting the Quick Surface Reconstruction WorkbenchPreparing the PartReconstruction of SurfacesUser TasksUsing the KeyboardCloud EditionActivating a Portion of a CloudScan and Curve CreationProjecting CurvesCutting by Planar SectionsFree EdgesCreating Associative 3D CurvesCreating Associative 3D Curves on a ScanCurves from ScansSketch from ScanCreating IntersectionsCreating ProjectionsSelecting Using Multi-OutputClean Contour CreationClean ContourCurves NetworkSurface CreationBasic Surface RecognitionPowerFitCreating Multi-sections SurfacesSurfaces NetworkAutomatic SurfaceOperationsJoining Surfaces or CurvesSplitting GeometryTrimming GeometryExtrapolating SurfacesCurves SliceAdjust NodesCleanContour SplitEdge FilletTransformationsPage 4

Quick Surface ReconstructionVersion 5 Release 16Performing a Symmetry on GeometryTranslating GeometryRotating GeometryTransforming Geometry by ScalingTransforming Geometry by AffinityTransforming Elements From an Axis to AnotherSegmentationCurvature SegmentationSlope SegmentationAnalysisInformationAnalyzing Distances Between Two Sets of ElementsPerforming a Curvature AnalysisChecking Connections Between SurfacesWireFrameCreating PointsCreating LinesCreating PlanesCreating CirclesInteroperabilityPoints in Generative Shape DesignUpdating PartsUsing the Historical GraphCreating DatumsDisplay OptionsManaging Geometrical SetsWorkbench DescriptionMenu BarCreation ToolbarsGeometrical SetsCloud EditionScan CreationCurve CreationDomain CreationSurface sisWireFrameAnalysis ToolbarsSpecification TreeGlossaryIndexPage 5

Version 5 Release 16Quick Surface ReconstructionPage 6OverviewWelcome to the Quick Surface Reconstruction User's Guide!This guide is intended for users who need to become quickly familiar with the product.This overview provides the following information: Quick Surface Reconstruction in a Nutshell Before Reading this Guide Getting the Most Out of this Guide Accessing Sample Documents Conventions Used in this GuideQuick Surface Reconstruction in a NutshellQuick Surface Reconstructioneasily and quickly recovers surfaces from digitized data that has beencleaned up and tessellated using the Digitized Shape Editor product.Quick Surface Reconstruction offers several approaches to recover surfaces depending of the type of shape : Organic shapes, i.e. free form surfaces, without features such as cylinders, fillets, planes, etc. Mechanical shapes (plane, cylinder, sphere, cone).Thanks to Quick Surface Reconstruction tools that analyze curvature or iso-slope properties, users can easilycreate mesh segmentations in pertinent surfaces area. Quick Surface Reconstruction includes its own qualitychecking tools.The Quick Surface Reconstruction user's guide has been designed to show you how to reconstruct surfacesusing these powerful tools. We recommend that you go through the "Getting Started" chapters first, to learnmore about those working methods.Before Reading this GuidePrior to reading the Quick Surface Reconstruction User's Guide, you are recommended to have a look atthe Infrastructure User's Guide for information on the generic capabilities common to all products.Getting the Most Out of this GuideTo make the most out of this book, we suggest that a beginning user reads the Getting Started chapterfirst of all and the Workbench Description to find his way around the Quick Surface Reconstructionworkbench.

Quick Surface ReconstructionVersion 5 Release 16Page 7Accessing Sample DocumentsTo perform the scenarios, sample documents are provided all along this documentation. For more informationabout this, refer to Accessing Sample Documents in the Infrastructure User's Guide.

Quick Surface ReconstructionVersion 5 Release 16Page 8What's New?New FunctionalitiesSketch from ScanThis action recognizes line, circles or ellipses from planar scans and builds a sketch with those elements.Automatic SurfaceThis action creates surfaces automatically from a mesh.

Version 5 Release 16Quick Surface ReconstructionPage 9Getting StartedThe following tutorial aims at giving you a feel of what you can do with Quick Surface Reconstruction.It provides a step-by-step scenario showing you how to use key capabilities.Quick Surface Reconstruction offers several approaches: N-side domain approach with boundary constraints and deviation tolerance through inner points: reconstructs surfaces that do not require the conservation of fillets or mechanical features, is a good compromise between quality and productivity, the result can be adjusted by deformation of the domain.Untrimmed approach: reconstructs surfaces including the fillets, does not require the creation of curves, enables the recovery of virtual sharp edges, applies fillets on virtual edges (adjustable radius).Mechanical approach: reconstructs surfaces with fillets and mechanical features models virtual sharp edges, identifies mechanical features, reconstructs fillets on virtual edges enables to modify fillets and mechanical features through their parameters.Whatever the method you choose, we recommend to work with meshs rather than with clouds of points.The "Getting Started" part of this guide will illustrate the first approach, with the following tasks:Starting the Quick Surface Reconstruction WorkbenchPreparing the PartReconstruction of SurfacesNote that we have changed the color of curves to blue and eventually renamed elements in the specificationtree.

Quick Surface ReconstructionVersion 5 Release 16All together this scenario should take 15 minutes to complete.The final cloud element will look like this:Page 10

Version 5 Release 16Quick Surface ReconstructionPage 11Starting the Quick Surface ReconstructionWorkbenchThe first task will show you how to enter the Quick Surface Reconstruction workbench and open data.The only pre-requisites for this task is to have a current session running.1. Choose Quick Surface Reconstruction from the Start menu.2. The Part name dialog box may appear depending on the way you customized your session.It provides a field for entering the name you wish to assign to the part, an option that enables hybrid design and another one that inserts a geometrical set in the part to be created.For more information, refer to the Part Document chapter in Customizing section of thePart Design documentationClick OK. The Quick Surface Reconstruction workbench is displayed and ready to use.3. Click the Open iconappears:or select the File Open. command. The following dialog box

Quick Surface ReconstructionVersion 5 Release 16Page 124. In the File Selection box, select the file location.Open the GettingStarted01.CATPart from the samples directory.For more information, see Creating, Opening and Saving Documents in the Infrastructure User's Guide.If you wish to use the whole screen space for the geometry, uncheck Specification in the View menu.

Version 5 Release 16Quick Surface ReconstructionPreparing the partThis task prepares the part for the reconstruction: creation of a curve defining a symmetry plane, creation of a surface tangent to the mesh, definition of reconstruction zones.Open the GettingStarted01.CATPart from the samples directory.Create the curve defining the symmetry plane:1. Click the Planar Sections iconand the select the mesh.2. Select the xy plane, enter 1 for the number of sections.Move the plane slightly upwards until a complete scan is visible.Click Apply, the scan is computed, PlanarSections.1 is displayed in the specification tree.3. Check the curve creation option. The Curve from Scans dialog box is displayed.A curve is computed. Its segmentation is displayed, and Curve.1 is displayed in the specification tree.Page 13

Quick Surface ReconstructionVersion 5 Release 164. Set the parameters in the Curve from Scans dialog box to your needs andpick the requested points on the computed curve to split it into several smaller curves.The first segmentation proposed is erased and the splitting points are displayed.Page 14

Quick Surface ReconstructionVersion 5 Release 165. Click Apply in the Curve from Scans dialog box: the curves are computed.Their segmentation is displayed as well as the gaps between the curves and the mesh.If necessary, pick on a green square to remove this split point,and pick another point of the scan to create a new split point.Click Apply to take those modifications into account.6. If necessary, check the Curvature analysis option to check the quality of the curves created.7. Once you are satisfied, click OK to validate the curves.The Curve.1 to Curve.10 elements are created in the specification tree.8. If you wish, you can change the color of those curves using the Edit/Properties menu.Create a tangent surface around the mesh:1. Click the Join iconand select the curves on the screen.Change the merging distance to 0.01mm. Click OK.The Join.1 element is created in the specification tree.Page 15

Version 5 Release 16Quick Surface Reconstruction2. Click the Translate iconand select Join.1 Enter the z axis for Direction and -15 mm for Distance.3. Click Preview and OK. The Translate.1 element is created in the specification tree.4. Click the Multi-sections Surface icon. Select Join.1 and Translate.1. Click Preview and OK.Page 16

Quick Surface ReconstructionVersion 5 Release 16Multi-sections Surface.1 is created in the specification tree.Define reconstruction zones on the mesh:1. Use the Plane action from the WireFrame toolbar to create planes through 3 points usingsplit points of step 1 and their counterpart on Translate.1:Page 17

Version 5 Release 16Quick Surface Reconstruction2. Click the Planar Sections icon. Select the mesh.3. Click the Plane icon in the dialog box and select one of the plane you have created.Enter 1 in the Number field. Create a curve as above. Repeat this step for each plane.Curve.11 to Curve.16 are created in the specification tree.4. Click the 3D Curve iconand create curves as follows:3D Curve.16 to 3D Curve.21 are created in the specification tree.Page 18

Quick Surface ReconstructionVersion 5 Release 16Reconstruction of SurfacesThe first task will show you how to create a clean contourTo make selection easier, hide the following elements: the mesh the curves created to build the tangent surface.Create a clean contour:1. Click the Clean Contour iconand select the following curves or edges:2. You see that the clean contour action takes the existing constraints into account:the edges of the surface are fixed.Click Apply and OK. A Join.2 element is created in the specification tree.The input curves have been sent to the NoShow.Page 19

Version 5 Release 16Quick Surface ReconstructionPage 203. You see that curves have been trimmed.4. Recall the mesh from the NoShow.Reconstruct a surface:1. Click the PowerFit icon. Select the mesh. It is sent to the NoShow. Select Join.2.

Quick Surface ReconstructionVersion 5 Release 16You can see that existing constraints are again taken into account.2. In the Parameters frame, check the Radius option and enter 10 as a radius value.Page 21

Quick Surface ReconstructionVersion 5 Release 16Page 223. Click Apply and OK. A Surface.1 element is created in the specification tree.Reconstruct a second surface:1. If necessary, recall hidden curves from the NoShow and create a clean contour as above.A Join.3 element is created in the specification tree.

Quick Surface ReconstructionVersion 5 Release 162. Recall the mesh from the NoShow.3. Create a second PowerFit surface as above using the recently created clean contour.4. You can reconstruct the other surfaces the same way.Page 23

Quick Surface ReconstructionVersion 5 Release 16User TasksUsing the KeyboardCloud EditionScan and Curve CreationClean Contour CreationSurface sisWireFrameInteroperabilityDisplay OptionsManaging Geometrical SetsPage 24

Version 5 Release 16Quick Surface ReconstructionUsing the KeyboardKeyCommandActionShift ActivateDeselects selected elementsShift 3D CurveActivates/de-activates the Snap on elements optionCtrlCurve from Scans Moves the split pointsCtrl3D CurveProjects a point on its constraining elementPage 25

Quick Surface ReconstructionVersion 5 Release 16Cloud EditionThis chapter deals with the Activation of portions of clouds of points or meshs.Page 26

Quick Surface ReconstructionVersion 5 Release 16Page 27Activating a Portion of a Cloud of PointsThis task shows how to select a portion of a cloud of points or of mesh in order to create a work area,either: by picking directly elements of the cloud (points, scans, grids, cells, clouds) or by defining a portion of the cloud or mesh with a 2D or 3D trap, by moving a brush over a portion of a mesh.The free edges displayed are those of the complete mesh: if you activate only a portion of a mesh, the free edges of that portion are not displayed.Open the Cloud.CATPart model the from the samples directory.Click here for more information on the dialog box.1. Click the Activate Areas iconand the mesh. The Activate dialog box is displayed.

Quick Surface ReconstructionVersion 5 Release 162. Draw a rectangle by dragging the mouse over the portion you want to select.Page 28

Quick Surface ReconstructionVersion 5 Release 16Page 29As you release the mouse, the triangles selected are highlighted in red.When you move the mouse over one corner of the rectangle, dimensioning arrows are displayed,enabling you to resize the rectangle.3. Push the Valid Trap button that is now available and draw a second rectangle. Push Valid Trapagain.

Quick Surface ReconstructionVersion 5 Release 164. Push the Swap button. The selection is inverted.Page 30

Quick Surface ReconstructionVersion 5 Release 165. Click OK to validate and exit the action.Page 31

Quick Surface ReconstructionVersion 5 Release 16Scan and Curve CreationYou can use the following tools to create scans or curves:Projecting CurvesCutting by Planar SectionsFree EdgesCreating Associative 3D CurvesCreating Associative 3D Curves on a ScanCurves from ScansSketch from ScanCreating IntersectionsCreating ProjectionsSelecting Using Multi-OutputPage 32

Version 5 Release 16Quick Surface ReconstructionProjecting CurvesThis task shows how to project curves on clouds of points or meshes.The action proposes options to: project the curves perpendicularly onto a mesh (not available for clouds of points), modify the projection direction, smooth computed scans directly into curves.Open the CurvesOnCloud1.CATPart model the from the samples directory.You can use either the cloud or the mesh.1. Click the Project Curves icon. The curve projection dialog box is displayed.2. Select the curves to project and the target cloud or mesh.Curves can be selected: from the specification tree, with a selection trap, with the preselection navigator.3. If the target is a cloud of points, the projection is automatically computed along a direction.If the target is a mesh, you can select the Projection type from the list:Page 33

Quick Surface ReconstructionVersion 5 Release 164. If the projection is computed along a direction, the direction proposed by default is the Z axis.You can choose another direction, using the contextual menu of the Direction field: the Edit Components option let you enter the coordinates of the direction:The Compass Direction option takes the compass current orientation as the projection direction.If you want to change this direction, modify the compass orientation and re-select Compass Directionto take the new direction into account.5. If the target is a cloud of points, you may set the working distance:the input curve is discretized, and each discretization point is projected on the cloud.The working distance is the distance taken into account around each projection point to computethe output scan.Enter 10 then 3 :The working distance is 10Page 34

Quick Surface ReconstructionVersion 5 Release 16The working distance is 36. You can set a sag value:the curve to project is discretized according to this sag value, and each discretization point isprojected on the mesh.The Sag is set to 1The Sag is set to 0.01Page 35

Quick Surface ReconstructionVersion 5 Release 167. If you want to create curves, check the Curve creation option.The operating mode is the same as for the Curve from Scans action except that only the curvature comb(no curvature analysis dialog box) is displayed.Page 36

Quick Surface ReconstructionVersion 5 Release 16 If the Curve creation option is checked, curves and only curves will be created. If the Curve creation option is not checked, scans and only scans will be created. Page 37If you need a complete curvature analysis of the curves you create, you have to create the scans first,and then create the curves with the Curve from Scans action.When you modify a parameter, click Apply in the corresponding dialog box to take it into account.8. Click Apply to check or update the result. Then click OK to confirm the result and exit the action. Scans are created in the specification tree under the name Curve Projection.x. Curves are created in the specification tree under the name Curve.x.

Quick Surface ReconstructionVersion 5 Release 16Page 38Cutting a Cloud of Points or a Mesh by PlanarSectionsThis task shows how to cut a cloud of points or a mesh by planes to compute scansand to smooth those scans directly to curves.The computation of sections with limiting curves has been improved: You no longer need to check the Lock Privileged Plane Orientation Parallel to Screenoption of the compass. But be careful to choose a view parallel to the screen.This enhancement enables you to define planar sections with the compasswhile using limiting curves.For an easier selection of curves, you can use the pre-selection navigator(see the Infrastructure User Guide for more information).Although cutting a cloud of points is quicker (no need to mesh first), creating planar sections on a meshrather than on a cloud of points has some advantages: the action is dynamic on meshes: no need to apply to visualize the modifications(position of the reference plane, step, number of planes,.), In the case of a cloud of points, the intersection may be interpolated, since the plane does not necessarilyintersect points. That problem is reduced with meshes since the plane intersects facets,providing a better accuracy.if you process an hybrid CloudsUnion element made of a mesh and a cloud of points,the planar sections will be created on the mesh only.Open the Cloud.CATPart model the from the samples directory.1. Click the Planar Sections iconand the cloud of points or the mesh.The Planar Sections dialog box is displayed with its default settings (as shown below):

Version 5 Release 16Quick Surface Reconstruction Number (of sections) is 1, Step value is 1, The Scans option is set to Grouped. Fixed is set to Step. The cutting planes are parallel to either YZ, XZ or XY depending on which isperpendicular to the largest edge of the working box. The status of the Infinite, Fixed and Scans are modal, The Number and Step values are modal.2. Use the Plane Definitionicons to select the reference plane according to your need:Page 39

Version 5 Release 16Quick Surface Reconstruction push the YZ push the compass icon push the plane icon or XZor XYPage 40icon to select a predefined plane, orto orient the reference plane with the compass, orto select an existing plane orPush the section guide iconand select a curve: the sections will be perpendicular to this curve.The degree of the section guide must be greater than 2.It is not possible to input a join (in the Generative Shape Design sense) as a section guide. One manipulator is available on the reference plane.It can be used to position the reference plane either by dragging the manipulator orby using the contextual menu Edit.Another manipulator is available on the last cutting planes proposed.This manipulator is used to modify either the step between cutting planes,or the number of planes, depending on the option selected in the Fixed fieldor in the contextual menu attached to this manipulator.Check the Keep this point option on any of those manipulators to create the correspondingpoint.3. After setting the orientation of the reference plane, you can move it along its normal or

Quick Surface ReconstructionVersion 5 Release 16Page 41along the section guide by dragging the center of the green manipulator in the required direction.4. If required, you can select one or two limiting curves for any of the plane option. Pick the first limiting curve, its name is displayed in the First curve field. You can then select a second limiting curve. Its name is displayed in the Second curve field. To replace a limiting curve by another, uncheck the corresponding field: the name is erased.Check the field again and select the new curve. Its name is displayed. The limiting curves should lay on the cloud of points or the mesh. The section guide curve can be selected as second limiting curve (not as the first). When using a limiting curve, the scans may be created on the "wrong" side of the curve.In fact, this side is determined by the origin of the reference plane.So move the reference plane to create the scans on the "right" side, either with the contextualEdit menu of the plane, or using the compass.5. Cutting planes can be defined : either from the step (distance) between two consecutives planes: check Fixed, Step, then enter the value of the Step in the dialog box,and enter the Number of planes in the dialog box or drag the green arrow until you reach therequired number of planes (the dialog box is updated automatically).or from their number : check Fixed, Number, then enter the Number of planes in the dialog box,and enter the Step between two planes or drag the green arrow until you reach the required step(the dialog box is updated automatically).You can also check the Infinite option, especially when dealing with large models.In that case, the planes displayed on screen are used only to position the reference plane anddefine the step between two planes, if it is not fixed.The system computes all the cutting planes necessary to cut the whole model.

Quick Surface ReconstructionVersion 5 Release 16Page 426. The Influence Area parameter defines a computation area around the cutting planes:when the points are not dense, a cutting plane (black line) may be unable to intersect the points.The Influence area is the area shown in yellow that contains the points considered to intersectthe cutting plane. You can define its value according to your needs.

Quick Surface ReconstructionVersion 5 Release 16Page 437. Select the type of the result scans: either : Distinct: the intersections are created as as many Planar Sections elements in the specification tree.Grouped: the intersections are created as one cloud (one Planar Sections element) inthe specification tree.

Quick Surface ReconstructionVersion 5 Release 16Page 448. If you want to create curves, click Apply in the Planar Sections dialog box to display a scan in thespecification tree and check the Curve creation option.The operating mode is the same as for the Curve from Scans action except that only the curvaturecomb(no curvature analysis dialog box) is displayed. If the Curve creation option is checked, curves and only curves will be created. If the Curve creation option is not checked, scans and only scans will be created. If you need a complete curvature analysis of the curves you create, you have to create thescans first,and then create the curves with the Curve from Scans action.When you modify a parameter, click Apply in the corresponding dialog box to take it intoaccount.9. Click Apply to check or update the result. Then click OK to confirm the result and exit the action. The scans are created in the specification tree, as Planar Sections.x. The scans created are ordered. Scans can then be exported to an ASCII file.

Version 5 Release 16Quick Surface ReconstructionPage 45Creating Free EdgesThis task shows you how to create scans or curves by creating the free edges of a mesh.You can: create scans on all the existing free edges, or only selected free edges, create scans on the whole free edge or only a portion of it, and select which portion, create curves directly from these scans and check their curvature if required. This action is available for meshes only! This action is available on a complete mesh or on a portion of it . If the Curve creation option is checked, curves and only curves will be created. If the Curve creation option is not checked, scans and only scans will be created. If you need a complete curvature analysis of the curves you create, you have to create the scans first,and then create the curves with the Curve from Scans action.When you modify a parameter, click Apply in the corresponding dialog box to take it into account.Open the FreeEdges1.CATPart from the samples directory1. Click the Create Free Edges iconand select a mesh.The dialog box is displayed and scans are proposed in cyan.

Quick Surface ReconstructionVersion 5 Release 162. Select the scans to process.By default, all computed scans are proposed.Place the cursor on a label Selected and right-click to launch the contextual menu.You can: Select or deselect singles scans, Select or deselect all scans.3. If necessary, pick two points on a selected scan to define a portion of scan to create.Both extremities of the scan are displayed, together with its direction (as a red arrow).You can invert this direction by clicking on the red arrow.Proposed direction, Before ApplyAfter ApplyPage 46

Quick Surface ReconstructionVersion 5 Release 16Inverted direction, Before ApplyPage 47After Apply4. To remove one extremity point, right-click on its label to start the contextual menu:5. Click Apply to apply any change you make.6. If you want to create scans, check the required option: Distinct to create distinct scans, Grouped to create one single scan.7. If you want to create curves, check the Curve creation option.The operating mode is the same as for the Curve from Scans action except that only the curvature comb

Quick Surface ReconstructionVersion 5 Release 16(no curvature analysis dialog box) is displayed.Page 48

Version 5 Release 16Quick Surface ReconstructionPage 49Creating Associative 3D CurvesThis task explains how to create a 3D curve that is associative meaning you can add or delete points (whether control points or passingpoints) both at creation time or when editing.These curves can be created in space or lie on a geometrical element, or both. When the curve lie on a geometrical element and the later ismodified, the curve is updated

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