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-- File: ShapeFix_Edge.cdl
-- Created: Wed Jun 17 13:31:39 1998
-- Author: data exchange team
-- <det@nnov.matra-dtv.fr>
---Copyright: Matra Datavision 1998
class Edge from ShapeFix inherits TShared from MMgt
---Purpose: Fixing invalid edge.
-- Geometrical and/or topological inconsistency:
-- - no 3d curve or pcurve,
-- - mismatching orientation of 3d curve and pcurve,
-- - incorrect SameParameter flag (curve deviation is greater than
-- edge tolerance),
-- - not adjacent curves (3d or pcurve) to the vertices.
uses
Surface from Geom,
Surface from ShapeAnalysis,
Edge from TopoDS,
Face from TopoDS,
Location from TopLoc,
Status from ShapeExtend,
ProjectCurveOnSurface from ShapeConstruct
is
Create returns Edge from ShapeFix;
---Purpose: Empty constructor
Projector (me: mutable) returns ProjectCurveOnSurface from ShapeConstruct;
---Purpose: Returns the projector used for recomputing missing pcurves
-- Can be used for adjusting parameters of projector
FixRemovePCurve (me: mutable; edge: Edge from TopoDS;
face: Face from TopoDS)
returns Boolean;
FixRemovePCurve (me: mutable; edge : Edge from TopoDS;
surface : Surface from Geom;
location: Location from TopLoc)
returns Boolean;
---Purpose: Removes the pcurve(s) of the edge if it does not match the
-- vertices
-- Check is done
-- Use : It is to be called when pcurve of an edge can be wrong
-- (e.g., after import from IGES)
-- Returns: True, if does not match, removed (status DONE)
-- False, (status OK) if matches or (status FAIL) if no pcurve,
-- nothing done
FixRemoveCurve3d (me: mutable; edge: Edge from TopoDS) returns Boolean;
---Purpose: Removes 3d curve of the edge if it does not match the vertices
-- Returns: True, if does not match, removed (status DONE)
-- False, (status OK) if matches or (status FAIL) if no 3d curve,
-- nothing done
FixAddPCurve (me: mutable; edge : Edge from TopoDS;
face : Face from TopoDS;
isSeam: Boolean;
prec : Real = 0.0)
returns Boolean;
---Purpose: See method below for information
FixAddPCurve (me: mutable; edge : Edge from TopoDS;
surface : Surface from Geom;
location: Location from TopLoc;
isSeam : Boolean;
prec : Real = 0.0)
returns Boolean;
---Purpose: See method below for information
FixAddPCurve (me: mutable; edge : Edge from TopoDS;
face : Face from TopoDS;
isSeam : Boolean;
surfana : Surface from ShapeAnalysis;
prec : Real = 0.0)
returns Boolean;
---Purpose: See method below for information
FixAddPCurve (me: mutable; edge : Edge from TopoDS;
surface : Surface from Geom;
location: Location from TopLoc;
isSeam : Boolean;
surfana : Surface from ShapeAnalysis;
prec : Real = 0.0)
returns Boolean;
---Purpose: Adds pcurve(s) of the edge if missing (by projecting 3d curve)
-- Parameter isSeam indicates if the edge is a seam.
-- The parameter <prec> defines the precision for calculations.
-- If it is 0 (default), the tolerance of the edge is taken.
-- Remark : This method is rather for internal use since it accepts parameter
-- <surfana> for optimization of computations
-- Use : It is to be called after FixRemovePCurve (if removed) or in any
-- case when edge can have no pcurve
-- Returns: True if pcurve was added, else False
-- Status :
-- OK : Pcurve exists
-- FAIL1: No 3d curve
-- FAIL2: fail during projecting
-- DONE1: Pcurve was added
-- DONE2: specific case of pcurve going through degenerated point on
-- sphere encountered during projection (see class
-- ShapeConstruct_ProjectCurveOnSurface for more info)
FixAddCurve3d (me: mutable; edge: Edge from TopoDS) returns Boolean;
---Purpose: Tries to build 3d curve of the edge if missing
-- Use : It is to be called after FixRemoveCurve3d (if removed) or in any
-- case when edge can have no 3d curve
-- Returns: True if 3d curve was added, else False
-- Status :
-- OK : 3d curve exists
-- FAIL1: BRepLib::BuildCurve3d() has failed
-- DONE1: 3d curve was added
FixVertexTolerance (me: mutable; edge: Edge from TopoDS;
face: Face from TopoDS) returns Boolean;
FixVertexTolerance (me: mutable; edge: Edge from TopoDS) returns Boolean;
---Purpose: Increases the tolerances of the edge vertices to comprise
-- the ends of 3d curve and pcurve on the given face
-- (first method) or all pcurves stored in an edge (second one)
-- Returns: True, if tolerances have been increased, otherwise False
-- Status:
-- OK : the original tolerances have not been changed
-- DONE1: the tolerance of first vertex has been increased
-- DONE2: the tolerance of last vertex has been increased
FixReversed2d (me: mutable; edge: Edge from TopoDS;
face: Face from TopoDS)
returns Boolean;
FixReversed2d (me: mutable; edge : Edge from TopoDS;
surface : Surface from Geom;
location: Location from TopLoc)
returns Boolean;
---Purpose: Fixes edge if pcurve is directed opposite to 3d curve
-- Check is done by call to the function
-- ShapeAnalysis_Edge::CheckCurve3dWithPCurve()
-- Warning: For seam edge this method will check and fix the pcurve in only
-- one direction. Hence, it should be called twice for seam edge:
-- once with edge orientation FORWARD and once with REVERSED.
-- Returns: False if nothing done, True if reversed (status DONE)
-- Status: OK - pcurve OK, nothing done
-- FAIL1 - no pcurve
-- FAIL2 - no 3d curve
-- DONE1 - pcurve was reversed
FixSameParameter (me: mutable; edge : Edge from TopoDS;
tolerance: Real = 0.0)
returns Boolean;
---Purpose: Tries to make edge SameParameter and sets corresponding
-- tolerance and SameParameter flag.
-- First, it makes edge same range if SameRange flag is not set.
--
-- If flag SameParameter is set, this method calls the
-- function ShapeAnalysis_Edge::CheckSameParameter() that
-- calculates the maximal deviation of pcurves of the edge from
-- its 3d curve. If deviation > tolerance, the tolerance of edge
-- is increased to a value of deviation. If deviation < tolerance
-- nothing happens.
--
-- If flag SameParameter is not set, this method chooses the best
-- variant (one that has minimal tolerance), either
-- a. only after computing deviation (as above) or
-- b. after calling standard procedure BRepLib::SameParameter
-- and computing deviation (as above). If <tolerance> > 0, it is
-- used as parameter for BRepLib::SameParameter, otherwise,
-- tolerance of the edge is used.
--
-- Use : Is to be called after all pcurves and 3d curve of the edge are
-- correctly computed
-- Remark : SameParameter flag is always set to True after this method
-- Returns: True, if something done, else False
-- Status : OK - edge was initially SameParameter, nothing is done
-- FAIL1 - computation of deviation of pcurves from 3d curve has failed
-- FAIL2 - BRepLib::SameParameter() has failed
-- DONE1 - tolerance of the edge was increased
-- DONE2 - flag SameParameter was set to True (only if
-- BRepLib::SameParameter() did not set it)
-- DONE3 - edge was modified by BRepLib::SameParameter() to SameParameter
-- DONE4 - not used anymore
-- DONE5 - if the edge resulting from BRepLib has been chosen, i.e. variant b. above
-- (only for edges with not set SameParameter)
Status (me; status: Status from ShapeExtend) returns Boolean;
---Purpose: Returns the status (in the form of True/False) of last Fix
fields
myStatus: Integer is protected;
myProjector: ProjectCurveOnSurface from ShapeConstruct is protected;
end Edge;
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