path: root/src/ShapeFix/ShapeFix_Wire.cdl

-- File:	ShapeFix_Wire.cdl
-- Created:	Wed Jun  3 12:33:14 1998
-- Author:	data exchange team
--		<det@nnov.matra-dtv.fr>
---Copyright:	 Matra Datavision 1998


class Wire from ShapeFix inherits Root from ShapeFix

    ---Purpose: This class provides a set of tools for repairing a wire.
    --
    --          These are methods Fix...(), organised in two levels:
    --
    -- Level 1: Advanced - each method in this level fixes one separate problem, 
    --          usually dealing with either single edge or connection of the
    --          two adjacent edges. These methods should be used carefully and
    --          called in right sequence, because some of them depend on others.
    --
    -- Level 2: Public (API) - methods which group several methods of level 1 
    --          and call them in a proper sequence in order to make some 
    --          consistent set of fixes for a whole wire. It is possible to 
    --          control calls to methods of the advanced level from methods of 
    --          the public level by use of flags Fix..Mode() (see below).
    --
    --          Fixes can be made in three ways:
    --       1. Increasing tolerance of an edge or a vertex
    --       2. Changing topology (adding/removing/replacing edge in the wire
    --          and/or replacing the vertex in the edge)
    --       3. Changing geometry (shifting vertex or adjusting ends of edge
    --          curve to vertices, or recomputing curves of the edge)
    --
    --          When fix can be made in more than one way (e.g., either
    --          by increasing tolerance or shifting a vertex), it is choosen
    --          according to the flags:
    --          ModifyTopologyMode - allows modification of the topology.
    --                               This flag can be set when fixing a wire on 
    --                               the separate (free) face, and should be
    --                               unset for face which is part of shell.
    --          ModifyGeometryMode - allows modification of the geometry.
    --
    --          The order of descriptions of Fix() methods in this CDL 
    --          approximately corresponds to the optimal order of calls.
    --
    --          NOTE: most of fixing methods expect edges in the 
    --          ShapeExtend_WireData to be ordered, so it is necessary to make
    --          call to FixReorder() before any other fixes
    --
    --          ShapeFix_Wire should be initialized prior to any fix by the 
    --          following data:
    --          a) Wire (ether TopoDS_Wire or ShapeExtend_Wire)
    --          b) Face or surface
    --          c) Precision
    --          This can be done either by calling corresponding methods
    --          (LoadWire, SetFace or SetSurface, and SetPrecision), or
    --          by loading already filled ShapeAnalisis_Wire with method Load

uses 

    Surface   from Geom,
    Face      from TopoDS,
    Vertex    from TopoDS, 
    Wire      from TopoDS, 
    Location  from TopLoc,
    WireData  from ShapeExtend, 
    Status    from ShapeExtend,
    Wire      from ShapeAnalysis,
    WireOrder from ShapeAnalysis,
    Edge      from ShapeFix

is

    Create returns Wire from ShapeFix;
    	---Purpose: Empty Constructor, creates clear object with default flags

    Create (wire: Wire from TopoDS; face: Face from TopoDS; prec: Real)
    returns Wire from ShapeFix;
    	---Purpose: Create new object with default flags and prepare it for use
        --          (Loads analyzer with all the data for the wire and face)

    --- Loading and extracting the wire and other working data:

    ClearModes (me: mutable);
    	---Purpose: Sets all modes to default

    ClearStatuses (me: mutable);
    	---Purpose: Clears all statuses
    
    Init (me: mutable; wire: Wire from TopoDS; 
    	    	      face: Face from TopoDS; prec: Real);
    	---Purpose: Load analyzer with all the data for the wire and face
	--          and drops all fixing statuses 

    Init (me: mutable; saw: Wire from ShapeAnalysis);
    	---Purpose: Load analyzer with all the data already prepared
	--          and drops all fixing statuses 
    	--          If analyzer contains face, there is no need to set it
    	--          by SetFace or SetSurface

    Load (me: mutable; wire: Wire from TopoDS);
    	---Purpose: Load data for the wire, and drops all fixing statuses
    	---Note   : It is necessary to set face or surface for the wire before fixes
    
    Load (me: mutable; sbwd: WireData from ShapeExtend);
    	---Purpose: Load data for the wire, and drops all fixing statuses
    	---Note   : It is necessary to set face or surface for the wire before fixes
    
    SetFace (me: mutable; face: Face from TopoDS);
    	---C++: inline
    	---Purpose: Set working face for the wire
    
    SetSurface (me: mutable; surf: Surface from Geom);
    	---C++: inline
    	---Purpose: Set surface for the wire
	---Remark : This function creates new face and calls SetFace
    
    SetSurface (me: mutable; surf: Surface from Geom; 
    	    	    	    loc: Location from TopLoc);
    	---C++: inline
    	---Purpose: Set surface for the wire
	---Remark : This function creates new face and calls SetFace
    
    SetPrecision (me: mutable; prec: Real) is redefined;
    	---Purpose: Set working precision (to root and to analyzer)

    IsLoaded (me) returns Boolean;
    	---C++: inline
    	---Purpose: Tells if the wire is loaded 
	---Remark:  returns myAnalyzer.IsLoadaed()

    IsReady (me) returns Boolean;
    	---C++: inline
    	---Purpose: Tells if the wire and face are loaded 
	---Remark:  returns myAnalyzer.IsReady()

    NbEdges (me) returns Integer;
        ---Purpose: returns number of edges in the working wire
	---Remark:  returns myAnalyzer.NbEdges()

    Wire (me) returns Wire from TopoDS;
    	---C++: inline
    	---Purpose: Makes the resulting Wire (by basic Brep_Builder)
	---Remark:  returns myAnalyzer.Wire()

    WireAPIMake (me) returns Wire from TopoDS;
    	---C++: inline
    	---Purpose: Makes the resulting Wire (by BRepAPI_MakeWire)
	---Remark:  returns myAnalyzer.WireAPIMake()

    Analyzer (me) returns Wire from ShapeAnalysis;
    	---Purpose: returns field Analyzer (working tool)

    WireData (me) returns WireData from ShapeExtend;
    	---C++: inline
    	---C++: return const &
    	---Purpose: returns working wire
	---Remark:  calls Analyzer.WireData()

    Face (me) returns Face from TopoDS;
    	---C++: inline
    	---C++: return const &
    	---Purpose: returns working face (Analyzer.Face())

    --- Parameters:

    ModifyTopologyMode (me: mutable) returns Boolean;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether it is 
    	--          allowed to modify topology of the wire during fixing
    	--          (adding/removing edges etc.)
    	---Use    : This flag can be set to True for wire on separate (free) face.
    	--          It should be set to False if the wire is on face which is a part
    	--          of a shell.
	---Default: False

    ModifyGeometryMode (me: mutable) returns Boolean;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether the Fix..()
    	--          methods are allowed to modify geometry of the edges and vertices
	---Default: True
	---Remark : Currently is not used

    ModifyRemoveLoopMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether the Fix..()
    	--          methods are allowed to modify RemoveLoop of the edges 
	---Default: -1
	---Remark : Currently is not used

    ClosedWireMode (me: mutable) returns Boolean;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether the wire
    	--          is to be closed (by calling methods like FixDegenerated() 
    	--          and FixConnected() for last and first edges). 
    	---Use    : This flag should be set to False if wire is not a face boundary 
    	--          but is a (not closed) curve on a face.
	---Default: True

    PreferencePCurveMode (me: mutable) returns Boolean;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether the 2d (True)
    	--          representation of the wire is preferable over 3d one (in the 
    	--          case of ambiguity in FixEdgeCurves).
	---Default: True (means that 2d representation is preferable).
	---Remark : Currently is not used

    FixGapsByRangesMode (me: mutable) returns Boolean;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag which defines whether tool
    	--          tries to fix gaps first by changing curves ranges (i.e.
    	--          using intersection, extrema, projections) or not.
	---Default: False (means that tool will only bend curves).
	---Remark : Currently is not used

    --- Flags:

    --- Level: Public (API)
    --         These flags are only used in Perform()
    FixReorderMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixSmallMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixConnectedMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixEdgeCurvesMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixDegeneratedMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixSelfIntersectionMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixLackingMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixGaps3dMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixGaps2dMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    	---Purpose: Returns (modifiable) the flag for corresponding Fix..() method
    	--          which defines whether this method will be called from the
   	--          method APIFix():
    	--       -1 default
    	--        1 method will be called
    	--        0 method will not be called

    --- Level: Advanced: 
    --         These flags are only used in FixEdgeCurves() and FixSelfIntersection()
    --         For FixEdgeCurves():
    FixReversed2dMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixRemovePCurveMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixAddPCurveMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixRemoveCurve3dMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixAddCurve3dMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixSeamMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixShiftedMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixSameParameterMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixVertexToleranceMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    --         For FixSelfIntersection():
    FixNotchedEdgesMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixSelfIntersectingEdgeMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixIntersectingEdgesMode (me: mutable) returns Integer;
    	---C++: inline
    	---C++: return &
    FixNonAdjacentIntersectingEdgesMode (me: mutable) returns Integer;
	---C++: inline
    	---C++: return &    
    	---Purpose: Returns (modifiable) the flag for corresponding Fix..() method
    	--          which defines whether this method will be called from the 
    	--          corresponding Fix..() method of the public level:
    	--       -1 default
    	--        1 method will be called
    	--        0 method will not be called

    --- Fixing methods:
    
    --- Level: Public (API)

    Perform (me: mutable) returns Boolean;
    	---Purpose: This method performs all the available fixes.
    	--          If some fix is turned on or off explicitly by the Fix..Mode() flag,
	--          this fix is either called or not depending on that flag.
	--          Else (i.e. if flag is default) fix is called depending on the 
	--          situation: some fixes are not called or are limited if order of 
        --          edges in the wire is not OK, or depending on modes
	--
    	--          The order of the fixes and default behaviour of Perform() are:
    	--          FixReorder
    	--          FixSmall (with lockvtx true if ! TopoMode or if wire is not ordered)
    	--          FixConnected (if wire is ordered)
    	--          FixEdgeCurves (without FixShifted if wire is not ordered)
    	--          FixDegenerated (if wire is ordered)
    	--          FixSelfIntersection (if wire is ordered and ClosedMode is True)
    	--          FixLacking (if wire is ordered)
	--
    	---Returns: False if nothing done, else True
    	--          Use methods Status...() to investigate the results of calls to the
        --          each fixing method. All statuses are dropped at the start of Perform().

    FixReorder (me: mutable) returns Boolean;
    	---Purpose: Performs an analysis and reorders edges in the wire using 
        --          class WireOrder 
    	---Returns: False if nothing to do, True if some edges were reordered
    	---Status : See StatusReorder() for details
	--          FAIL1 - ShapeAnalysis_WireOrder has detected several loops
	--          FAIL2 - ShapeAnalysis_WireOrder failed (result is incorrect)
	--          DONE1 - Reorder done OK
	--          DONE2 - in addition to DONE1 - some gaps remain
	--          DONE3 - in addition to DONE1 - some edges were reversed

    FixSmall (me: mutable; lockvtx: Boolean; precsmall: Real = 0.0) 
    returns Integer;
    	---Purpose: Applies FixSmall(num) to all edges in the wire
    	---Returns: True if some edges were removed, else False
    	---Status : See StatusSmall() for details
    	--          OK   : Edge is not null-length
    	--          DONE1: Edge is null-length and has the same vertices at begin 
        --                 and end; removed
    	--          DONE2: (only if lockvtx is False and ModifyTopologyMode is True)
        --                 Edge is null-length and has different vertices at begin and end; 
        --                 edge removed, and CheckConnected called for adjacent edges
    	--          FAIL1: Edge cannot be checked (no 3d curve and no pcurve)
    	--          FAIL2: Edge is null-length and has different vertices at begin 
	--                 and end, and lockvtx is True or ModifyTopologyMode is False; 
        --                 edge is not removed
    	--          FAIL3: In the case of DONE2, CheckConnected has failed

    FixConnected (me: mutable; prec: Real = -1.0) returns Boolean;
    	---Purpose: Applies FixConnected(num) to all edges in the wire
    	--          Connection between first and last edges is treated only if 
    	--          flag ClosedMode is True
	--          If <prec> is -1 then MaxTolerance() is taken.
    	---Returns: True if some vertices were replaced, False if OK or fail
    	---Status : See StatusConnected() for details
    	--          OK   : If they are already the same, nothing done
    	--          DONE1: Absolutely confused (gp::Resolution), set the same
    	--          DONE2: Confused with Analyzer.Precision(), set the same
    	--          DONE3: Confused with <prec> but not Analyzer.Precision(), set the same
    	--          FAIL1: Not confused neither with prec nor Analyzer.Precision()
    
    FixEdgeCurves (me: mutable) returns Boolean;
    	---Purpose: Groups the fixes dealing with 3d and pcurves of the edges.
    	--          The order of the fixes and the default behaviour are:
    	--          ShapeFix_Edge::FixReversed2d
    	--          ShapeFix_Edge::FixRemovePCurve (only if forced)
        --          ShapeFix_Edge::FixAddPCurve
        --          ShapeFix_Edge::FixRemoveCurve3d (only if forced)
        --          ShapeFix_Edge::FixAddCurve3d
    	--          FixSeam,
    	--          FixShifted,
    	--          ShapeFix_Edge::FixSameParameter
    	---Returns: False if nothing done, else True
    	---Status : See StatusEdgeCurves() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1, FAIL1 - FixReversed2d was fixed and/or failed
	--          DONE2, FAIL2 - FixRemovePCurve was fixed and/or failed
	--          DONE3, FAIL3 - FixAddPCurve was fixed and/or failed
	--          DONE4, FAIL4 - FixRemoveCurve3d was fixed and/or failed
	--          DONE5, FAIL5 - FixAddCurve3d was fixed and/or failed
	--          DONE6, FAIL6 - FixSeam was fixed and/or failed
	--          DONE7, FAIL7 - FixShifted was fixed and/or failed
	--          DONE8, FAIL8 - FixSameParameter or FixVertexTolerance were fixed and/or failed

    FixDegenerated (me: mutable) returns Boolean;
    	---Purpose: Applies FixDegenerated(num) to all edges in the wire
    	--          Connection between first and last edges is treated only if 
    	--          flag ClosedMode is True
    	---Returns: True if at least one degenerated edge was fixed or added
    	---Status : See StatusDegenerated() for details
    	--          OK   : Nothing done
    	--          FAIL1: Analysis has failed
    	--          DONE1: New degenerated edge was added
    	--          DONE2: Edge <num> was made degenerated
    
    FixSelfIntersection ( me: mutable ) returns Boolean;
    	---Purpose: Applies FixSelfIntersectingEdge(num) and 
    	--          FixIntersectingEdges(num) to all edges in the wire and
	--          FixIntersectingEdges(num1, num2) for all pairs num1 and num2
	--          such that num2 >= num1 + 2
    	--          and removes wrong edges if any
    	---Returns: True if something was fixed, else False
    	---Status : See StatusSelfIntersection() for details
    	--          OK   : No intersection found
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: self-intersection was found, but not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
	--          FAIL3: intercestion of non adjacent edges found, but not fixed 
        --                 because of limit of increasing tolerance (MaxTolerance) 
    	--          DONE1: tolerance of vertex was increased to fix self-intersection
    	--          DONE2: vertex was moved to fix self-intersection
    	--          DONE3: some edges were removed because of intersection
    	--          DONE4: pcurve(s) was(were) modified
	--          DONE5: non adjacent intersection fixed by increasing tolerance of
	--                 vertex(vertices)
	--          DONE6: tolerance of edge was increased to hide intersection
	--          DONE7: range of some edges was decreased to avoid intersection

    FixLacking (me: mutable; force: Boolean = Standard_False) returns Boolean;
    	---Purpose: Applies FixLacking(num) to all edges in the wire
    	--          Connection between first and last edges is treated only if 
    	--          flag ClosedMode is True
	--          If <force> is False (default), test for connectness is done with 
	--          precision of vertex between edges, else it is done with minimal
	--          value of vertex tolerance and Analyzer.Precision().
	--          Hence, <force> will lead to inserting lacking edges in replacement
	--          of vertices which have big tolerances.
    	---Returns: True if lacking edge was fixed, else False.
    	---Status : See StatusLacking() for more details
    	--          OK   : No problems detected
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: lacking edge not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
    	--          FAIL3: failed to build lacking edge (3d curve) 
    	--          DONE1: tolerance was increased to fix lacking edge
    	--          DONE2: lacking edge was inserted

    FixClosed (me: mutable; prec: Real = -1.0) returns Boolean;
    	---Purpose: Fixes a wire to be well closed
    	--          It performs FixConnected, FixDegenerated and FixLacking between
    	--          last and first edges (independingly on flag ClosedMode and modes
        --          for these fixings)
	--          If <prec> is -1 then MaxTolerance() is taken.
    	---Returns: False if nothing done, else True
    	---Status : See StatusClosed() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1, FAIL1 - FixConnected was fixed and/or failed
	--          DONE2, FAIL2 - FixDegenerated was fixed and/or failed
	--          DONE3, FAIL3 - FixLacking was fixed and/or failed

    FixGaps3d (me: mutable) returns Boolean;
    	---Purpose: Fixes gaps between ends of 3d curves on adjacent edges
	--          myPrecision is used to detect the gaps.
    	---Returns: False if nothing done, else True
    	---Status : See StatusGaps3d() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1 - Some gaps in 3d were found and fixed
	--          FAIL1 - There was no 3d curve found on some edges
	--          FAIL2 - Method failed to fix some gaps

    FixGaps2d (me: mutable) returns Boolean;
    	---Purpose: Fixes gaps between ends of pcurves on adjacent edges
	--          myPrecision is used to detect the gaps.
    	---Returns: False if nothing done, else True
    	---Status : See StatusGaps2d() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1 - Some gaps in 2d were found and fixed
	--          FAIL1 - There was no pcurve found on some edges
	--          FAIL2 - Method failed to fix some gaps

    --- Level: Advanced
    
    ---Status: For analyzing the status of the last performed method use 
    --         LastFixStatus(status)
    --
    --         All the Fix.. methods below return False if the problem was not 
    --         fixed, in this case LastFixStatus contains either FAIL or OK.
    --         If a method returns True the LastFixStatus contains DONE,
    --         this means that some fix was made
    --         For detailed meaning of Status see corresponding method.
    
    FixReorder (me: mutable; wi: in WireOrder from ShapeAnalysis) returns Boolean;
    	---Purpose: Reorder edges in the wire as determined by WireOrder
    	--          that should be filled and computed before
    	---Returns: False if nothing to do, True if some edges were reordered
    	---Status : See LastFixStatus() for details
	--          OK    - edges are ordered well
	--          FAIL1 - WireOrder has detected several loops
	--          FAIL2 - WireOrder is incorrect (wrong number of edges)
	--          FAIL3 - WireOrder is incorrect 
	--          DONE1 - reorder was performed successfully

    FixSmall (me: mutable; num: Integer; lockvtx: Boolean; precsmall: Real)
    returns Boolean;
    	---Purpose: Fixes Null Length Edge to be removed
    	--          If an Edge has Null Length (regarding preci, or <precsmall>
    	--          - what is smaller), it should be removed
    	--          It can be with no problem if its two vertices are the same
    	--          Else, if lockvtx is False, it is removed and its end vertex
    	--          is put on the preceeding edge
    	--          But if lockvtx is True, this edge must be kept ...
    	---Use    : Is to be used in the case if some edges can be too short, and 
	--          should be removed (hence, if topology of the wire can be modified). 
    	--          It is recommended to call this method before FixIntersection()
    	--
    	---Returns: True if null edge was removed, False if nothing done
    	---Status : See LastFixStatus() for details
    	--          OK   : Edge is not null-length
    	--          DONE1: Edge is null-length and has the same vertices at begin 
        --                 and end; removed
    	--          DONE2: (only if lockvtx is False and ModifyTopologyMode is True)
        --                 Edge is null-length and has different vertices at begin and end; 
        --                 edge removed, and CheckConnected called for adjacent edges
    	--          FAIL1: Edge cannot be checked (no 3d curve and no pcurve)
    	--          FAIL2: Edge is null-length and has different vertices at begin 
	--                 and end, and lockvtx is True or ModifyTopologyMode is False; 
        --                 edge is not removed
    	--          FAIL3: In the case of DONE2, CheckConnected has failed

    FixConnected (me: mutable; num: Integer; prec: Real)
    returns Boolean;
    	---Purpose: Fixes connected edges (preceeding and current)
    	--          Forces Vertices (end of preceeding-begin of current) to be
    	--          the same one
    	--          Tests with starting preci or, if given greater, <prec>
	--          If <prec> is -1 then MaxTolerance() is taken.
   	--
    	---Use    : It is to be used if two consequent edges in the wire have not
    	--          the same common vertex, e.g., if wire was constructed from 
    	--          not connected edges or some operations like adding/removing an
    	--          edge were done.
    	--          While it may change vertices, it should not be
    	--          called in cases when vertices may not be changed ...
	--
	---Remark : Replacement of vertices in the edges is made by copying these edges
   	--
    	---Returns: False if edges are already connected (vertices are the same) or if
	--          it is not possible to perform fix (edges have a gap more than <prec>); 
        --          True if disconnected situation was fixed by producing a new Vertex 
    	--          at the middle of the former ones.
    	---Status:
    	--          OK   : If they are already the same, nothing done
    	--          DONE1: Absolutely confused (gp::Resolution), set the same
    	--          DONE2: Confused with Analyzer.Precision(), set the same
    	--          DONE3: Confused with <prec> but not Analyzer.Precision(), set the same
    	--          FAIL1: Not confused neither with prec nor Analyzer.Precision()

    FixSeam (me: mutable; num: Integer) returns Boolean;
    	---Purpose: Fixes a seam edge
    	--          A Seam edge has two pcurves, one for forward. one for reversed
    	--          The forward pcurve must be set as first
    	--
    	--          NOTE that correct order of pcurves in the seam edge depends on
    	--          its orientation (i.e., on orientation of the wire, method of 
    	--          exploration of edges etc.).
    	--          Since wire represented by the ShapeExtend_WireData is always forward
    	--          (orientation is accounted by edges), it will work correct if:
    	--       1. Wire created from ShapeExtend_WireData with methods 
    	--          ShapeExtend_WireData::Wire..() is added into the FORWARD face 
    	--          (orientation can be applied later)
    	--       2. Wire is extracted from the face with orientation not composed
    	--          with orientation of the face
   	--
    	---Use    : This operation should be called after reversing the wire if it 
    	--          contains seam edges. 
    	--
    	---Returns: True if edge is a seam and its curves were fixed (reordered), else False
        ---Status : See StatusSeam() for details
	--          OK - edge is not a seam or has pcurves OK
	--          DONE1 - seam pcurves were fixed

    FixShifted (me: mutable) returns Boolean;
    	---Purpose: Fixes edges which have pcurves shifted by whole parameter 
    	--          range on the closed surface (the case may occur if pcurve 
    	--          of edge was computed by projecting 3d curve, which goes 
    	--          along the seam). 
    	--          It compares each two consequent edges and tries to connect them 
    	--          if distance between ends is near to range of the surface.
    	--          It also can detect and fix the case if all pcurves are connected,
    	--          but lie out of parametric bounds of the surface.
	--          In addition to FixShifted from ShapeFix_Wire, more
	--          sophisticated check of degenerate points is performed,
	--          and special cases like sphere given by two meridians 
	--          are treated.
    	---Use    : Is to be used if some pcurves were recomputed.
    	--          It is recommended to use it before FixDegenerated.
    	---Returns: False if nothing done, else True
    	---Status : See StatusShifted() for details
    	--          OK: If pcurves are OK
    	--          FAIL1: some pcurves are missing
    	--          DONE1: some pcurves were shifted in order to ensure connection 
        --                 between edges
	--          DONE2: all pcurves were shifted in order to be in the parametric 
	--                 range of a surface

    FixDegenerated (me: mutable; num: Integer) returns Boolean;
    	---Purpose: Fixes Degenerated Edge
	--          Checks an <num-th> edge or a point between <num>th-1 and <num>th
	--          edges for a singularity on a supporting surface.
	--          If singularity is detected, either adds new degenerated edge 
        --          (before <num>th), or makes <num>th edge to be degenerated.
    	---Use    : It is to be called for faces which lie on surfaces with 
    	--          singularities. 
    	--          It should be called after all pcurves are correctly computed.
    	---Returns: False if nothing done, else True
    	---Status : See LastFixStatus() for details
    	--          OK   : Nothing done
    	--          FAIL1: Analysis has failed
    	--          DONE1: New degenerated edge was added
    	--          DONE2: Edge <num> was made degenerated
    	--          DONE3: Edge <num> was incorrectly coded as degenerated, removed

    FixSelfIntersectingEdge ( me: mutable; num: Integer )
    returns Boolean is private;
    	---Purpose: Detect and fix self-intersecting pcurve of edge <num>.
	--          Fix is made by one of two methods:
        --          - cut out the self-intersection loop on pcurve (thus 
        --            producing C0 pcurve). This also increases tolerance of edge
	--            in order to satisfy SameParameter requirement.
        --          - increase tolerance of the vertex of edge nearest to the 
        --            self-intersection point so that it comprises that point.
        --          The first method is considered only if ModifyGeometryMode 
        --          is True. In that case, the method which requires less 
        --          increasing of tolerance is selected. 
    	---Returns: True if it was done, else False
    	---Status : See LastFixStatus() for details
    	--          OK   : Edge is not self-intersecting
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: self-intersection was found, but not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
    	--          DONE1: tolerance was increased to fix self-intersection
    	--          DONE4: pcurve was modified (self-intersection loop cutted out)

    FixIntersectingEdges ( me: mutable; num: Integer )
    returns Boolean is private;
    	---Purpose: Test if two consequent edges are intersecting and fix it
   	--          by increasing of tolerance of vertex between edges,
    	--          shifting this vertex to the point of intersection,
    	--          cutting edges to the intersection point.
    	--          It also can give signal to remove edge if it whole is cut by
    	--          intersection (if flag ModifyTopologyMode is set).
   	--
    	---Returns: False if nothing done, True if something was fixed.
    	---Status : See LastFixStatus() for details
    	--          OK   : No intersection found
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: self-intersection was found, but not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
    	--          DONE1: tolerance was increased to fix self-intersection
    	--          DONE2: vertex was moved to fix self-intersection
    	--          DONE3: previous or
    	--          DONE4: current edge should be removed because of intersection
	--          DONE6: tolerance of edge was increased to hide intersection
	--          DONE7: range of some edges was decreased to avoid intersection

    FixIntersectingEdges (me: mutable; num1  : Integer;
    	    	    	      	      num2  : Integer)
    returns Boolean is private;
    	---Purpose: Tests if two edges <num1> and <num2> are intersecting and
    	--          fix intersection by increasing of tolerance of vertex
    	--          nearest to the point of intersection.
   	--
    	---Returns: False if nothing done, True if something was fixed.
    	---Status : See LastFixStatus() for details
    	--          OK   : No intersection found
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: self-intersection was found, but not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
    	--          DONE1: tolerance was increased to fix self-intersection
    
    FixLacking ( me: mutable; num: Integer; force: Boolean = Standard_False )
    returns Boolean;
    	---Purpose: Fixes Lacking Edge 
    	--          Test if two adjucent edges are disconnected in 2d (while 
        --          connected in 3d), and in that case either increase tolerance 
        --          of the vertex or add a new edge (straight in 2d space), in 
        --          order to close wire in 2d.
	--          Returns True if edge was added or tolerance was increased.
        ---Algorithm:
        --       1. Compute the 2d gap between edges and calculate a tolerance
  	--          which should have vertex in order to comprise the gap
        --          (using GeomAdaptor_Surface); computed value is inctol
        --       2. If inctol < tol of vertex, return False (everything is OK)
        --       3. If inctol < Precision, just increase tolerance of vertex to inctol
        --       4. Else (if both edges are not degenerated) try to add new edge 
        --          with straight pcurve (in order to close the gap):
        --       a) if flag MayEdit is False
        --          1. if inctol < MaxTolerance, increase tolerance of vertex to inctol
        --          2. else try to add degenerated edge (check that middle point of 
        --             that pcurve is inside the vertex)
        --       b) if MayEdit is True
        --          1. try to replace big vertex with two new small vertices 
        --             connected by new edge. This is made if there is a 3d space
        --             between ends of adjacent edges.
        --          2. if inctol < MaxTolerance, increase tolerance of vertex to inctol
        --          3. else add either degenerated or closed edge (if middle point
        --             of a pcurve of a new edge is inside the vertex, then
        --             degenerated edge is added, else new edge is closed).
        --       5. If new edge cannot be added, but inctol < MaxTolerance,
        --          when increase tolerance of vertex to a value of inctol
   	--
    	---Use    : This method should be used after all pcurves in the wire are 
    	--          correctly computed. It is not recommended to use this method 
    	--          after FixDegenerated() and before FixSelfIntersection().
    	--
    	---Returns: False if nothing done, else True.
    	---Status : See LastFixStatus() for more details
    	--          OK   : If nothing done
    	--          FAIL1: analysis failed (edge has no pcurve, or no vertices etc.)
    	--          FAIL2: lacking edge not fixed because of 
        --                 limit of increasing tolerance (MaxTolerance)
    	--          FAIL3: failed to build lacking edge (3d curve) 
    	--          DONE1: tolerance was increased to fix lacking edge
    	--          DONE2: lacking edge was inserted
    	--          DONE3: (in addition to DONE2) inserted edge is degenerated
    	--          DONE4: (in addition to DONE2) inserted edge is closed
    	--          DONE5: pcurves of edges were bent (only if ModifyGeometry is True)
    
    FixNotchedEdges(me: mutable) returns Boolean;
    
    FixDummySeam(me: mutable; num: Integer) is private;

    FixGap3d ( me: mutable; num: Integer; convert: Boolean = Standard_False )
    returns Boolean;
    	---Purpose: Fixes gap between ends of 3d curves on num-1 and num-th edges.
	--          myPrecision is used to detect the gap.
	--          If convert is True, converts curves to bsplines to bend.
        ---Algorithm:
    	---Returns: False if nothing done, else True
    	---Status : See StatusGaps3d() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1 - A gap in 3d were found and fixed
	--          FAIL1 - There was no 3d curve found on some edge
	--          FAIL2 - Method failed to fix the gap

    FixGap2d ( me: mutable; num: Integer; convert: Boolean = Standard_False )
    returns Boolean;
    	---Purpose: Fixes gap between ends of pcurves on num-1 and num-th edges.
	--          myPrecision is used to detect the gap.
	--          If convert is True, converts pcurves to bsplines to bend.
        ---Algorithm:
    	---Returns: False if nothing done, else True
    	---Status : See StatusGaps2d() for details
	--          OK - no problem was detected, nothing fixed
	--          DONE1 - A gap in 2d were found and fixed
	--          FAIL1 - There was no pcurve found on some edge
	--          FAIL2 - Method failed to fix the gap

    --- Result of fixes: 

    StatusReorder          (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusSmall            (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusConnected        (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusEdgeCurves       (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusDegenerated      (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusSelfIntersection (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusLacking          (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusClosed           (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusGaps3d           (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusGaps2d           (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusNotches          (me; status: Status from ShapeExtend) returns Boolean;
    	---C++: inline
    StatusRemovedSegment   (me) returns Boolean;
    	---C++: inline
    	---Purpose: Querying the status of perfomed API fixing procedures
    	--          Each Status..() methods gives information about the last call to
    	--          the corresponding Fix..() method of API level:
    	--          OK  : no problems detected; nothing done
    	--          DONE: some problem(s) was(were) detected and successfully fixed
    	--          FAIL: some problem(s) cannot be fixed
    	---Level  : Public (API)
    LastFixStatus (me; status: Status from ShapeExtend) returns Boolean;		 
    	---C++: inline
    	---Purpose: Queries the status of last call to methods Fix... of 
    	--          advanced level
    	--          For details see corresponding methods; universal statuses are:
    	--          OK  : problem not detected; nothing done
    	--          DONE: problem was detected and successfully fixed
    	--          FAIL: problem cannot be fixed
    	---Level  : Advanced
	
    FixEdgeTool (me) returns Edge from ShapeFix;
    	---Purpose: Returns tool for fixing wires.
	---C++: inline

    UpdateWire (me: mutable) is protected;
    	---Purpose: Updates WireData if some replacements are made
	--          This is necessary for wires (unlike other shape types)
	--          since one edge can present in wire several times
	
fields

    myFixEdge : Edge from ShapeFix is protected;
    myAnalyzer: Wire from ShapeAnalysis is protected; -- working analyzer

    myGeomMode:        Boolean is protected; -- may change geometry
    myTopoMode:        Boolean is protected; -- may change topology
    myClosedMode:      Boolean is protected; -- should wire be closed?
    myPreference2d:    Boolean is protected; -- is 2d representation of edge preferred
    myFixGapsByRanges: Boolean is protected; -- try to fix gaps by changing curves ranges

    myFixReversed2dMode:                    Integer is protected;
    myFixRemovePCurveMode:                  Integer is protected;
    myFixAddPCurveMode:                     Integer is protected;
    myFixRemoveCurve3dMode:                 Integer is protected;
    myFixAddCurve3dMode:                    Integer is protected;
    myFixSeamMode:                          Integer is protected;
    myFixShiftedMode:                       Integer is protected;
    myFixSameParameterMode:                 Integer is protected;
    myFixVertexToleranceMode:               Integer is protected;
    myFixNotchedEdgesMode:                  Integer is protected;
    myFixSelfIntersectingEdgeMode:          Integer is protected;
    myFixIntersectingEdgesMode:             Integer is protected;
    myFixNonAdjacentIntersectingEdgesMode:  Integer is protected;

    myRemoveLoopMode:                       Integer is protected;
      -- -1 - old variant (default)
      --  0 - try remove both 2d loop and 3d loop
      --  1 - try insert new vertex

    myFixReorderMode:          Integer is protected;
    myFixSmallMode:            Integer is protected;
    myFixConnectedMode:        Integer is protected;
    myFixEdgeCurvesMode:       Integer is protected;
    myFixDegeneratedMode:      Integer is protected;
    myFixSelfIntersectionMode: Integer is protected;
    myFixLackingMode:          Integer is protected;
    myFixGaps3dMode:           Integer is protected;
    myFixGaps2dMode:           Integer is protected;
  
    myLastFixStatus:          Integer is protected; -- status of last fix of advanced level

    -- statuses corresponding to API methods, queried by Status..(status) methods
    myStatusReorder:          Integer is protected;    
    myStatusSmall:            Integer is protected;    
    myStatusConnected:        Integer is protected;    
    myStatusEdgeCurves:       Integer is protected;    
    myStatusDegenerated:      Integer is protected;    
    myStatusClosed:           Integer is protected;    
    myStatusSelfIntersection: Integer is protected; 
    myStatusLacking:          Integer is protected;
    myStatusGaps3d:           Integer is protected;
    myStatusGaps2d:           Integer is protected;
    myStatusRemovedSegment:   Boolean is protected;
    myStatusNotches:          Integer is protected;
end Wire;