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-- File: BRepOffsetAPI_FindContigousEdges.cdl
-- Created: Tue May 2 11:38:44 1995
-- Author: Jing Cheng MEI
-- <mei@junon>
---Copyright: Matra Datavision 1995
class FindContigousEdges from BRepOffsetAPI
---Purpose: Provides methods to identify contigous boundaries
-- for continuity control (C0, C1, ...)
--
-- Use this function as following:
-- - create an object
-- - default tolerance 1.E-06
-- - with analysis of degenerated faces on
-- - define if necessary a new tolerance
-- - set if necessary analysis of degenerated shapes off
-- - add shapes to be controlled -> Add
-- - compute -> Perfom
-- - output couples of connected edges for control
-- - output the problems if any
uses
Edge from TopoDS,
Shape from TopoDS,
ListOfShape from TopTools,
Sewing from BRepBuilderAPI
raises
OutOfRange from Standard,
NoSuchObject from Standard
is
Create(tolerance: Real = 1.0e-06; -- tolerance of connexity
option: Boolean = Standard_True) -- option for analysis of degenerated shapes
---Purpose: Initializes an algorithm for identifying contiguous edges
-- on shapes with tolerance as the tolerance of contiguity
-- (defaulted to 1.0e-6). This tolerance value is used to
-- determine whether two edges or sections of edges are coincident.
-- Use the function Add to define the shapes to be checked.
-- Set option to false. This argument (defaulted to true) will
-- serve in subsequent software releases for performing an
-- analysis of degenerated shapes.
returns FindContigousEdges from BRepOffsetAPI;
Init(me: in out; tolerance: Real; option: Boolean);
---Purpose: Initializes this algorithm for identifying contiguous edges
-- on shapes using the tolerance of contiguity tolerance.
-- This tolerance value is used to determine whether two
-- edges or sections of edges are coincident.
-- Use the function Add to define the shapes to be checked.
-- Sets <option> to false.
Add(me: in out; shape: Shape from TopoDS);
---Purpose: Adds the shape shape to the list of shapes to be
-- checked by this algorithm.
-- Once all the shapes to be checked have been added,
-- use the function Perform to find the contiguous edges
-- and the function ContigousEdge to return these edges.
Perform(me: in out);
---Purpose: Finds coincident parts of edges of two or more shapes
-- added to this algorithm and breaks down these edges
-- into contiguous and non-contiguous sections on copies
-- of the initial shapes.
-- The function ContigousEdge returns contiguous
-- edges. The function Modified can be used to return
-- modified copies of the initial shapes where one or more
-- edges were broken down into contiguous and non-contiguous sections.
-- Warning
-- This function must be used once all the shapes to be
-- checked have been added. It is not possible to add
-- further shapes subsequently and then to repeat the call to Perform.
NbEdges(me) returns Integer;
---Purpose: Gives the number of edges (free edges + contigous
-- edges + multiple edge)
NbContigousEdges(me) returns Integer;
---Purpose: Returns the number of contiguous edges found by the
-- function Perform on the shapes added to this algorithm.
ContigousEdge(me; index: Integer) returns Edge from TopoDS
---Purpose: Returns the contiguous edge of index index found by
-- the function Perform on the shapes added to this algorithm.
-- Exceptions
-- Standard_OutOfRange if:
-- - index is less than 1, or
-- - index is greater than the number of contiguous
-- edges found by the function Perform on the shapes added to this algorithm.
---C++: return const &
raises
OutOfRange from Standard;
ContigousEdgeCouple(me; index: Integer) returns ListOfShape from TopTools
---Purpose: Returns a list of edges coincident with the contiguous
-- edge of index index found by the function Perform.
-- There are as many edges in the list as there are faces
-- adjacent to this contiguous edge.
-- Exceptions
-- Standard_OutOfRange if:
-- - index is less than 1, or
-- - index is greater than the number of contiguous edges
-- found by the function Perform on the shapes added to this algorithm.
---C++: return const &
raises
OutOfRange from Standard;
SectionToBoundary(me; section: Edge from TopoDS) returns Edge from TopoDS
---Purpose: Returns the edge on the initial shape, of which the
-- modified copy contains the edge section.
-- section is coincident with a contiguous edge found by
-- the function Perform. Use the function
-- ContigousEdgeCouple to obtain a valid section.
-- This information is useful for verification purposes, since
-- it provides a means of determining the surface to which
-- the contiguous edge belongs.
-- Exceptions
-- Standard_NoSuchObject if section is not coincident
-- with a contiguous edge. Use the function
-- ContigousEdgeCouple to obtain a valid section.
---C++: return const &
raises
NoSuchObject from Standard;
NbDegeneratedShapes(me) returns Integer;
---Purpose: Gives the number of degenerated shapes
DegeneratedShape(me; index: Integer) returns Shape from TopoDS
---Purpose: Gives a degenerated shape
---C++: return const &
raises
OutOfRange from Standard;
-- raised if index < 1 or > NbDegeneratedShapes
IsDegenerated(me; shape: Shape from TopoDS) returns Boolean;
---Purpose: Indicates if a input shape is degenerated
IsModified(me; shape: Shape from TopoDS) returns Boolean;
---Purpose: Returns true if the copy of the initial shape shape was
-- modified by the function Perform (i.e. if one or more of
-- its edges was broken down into contiguous and non-contiguous sections).
-- Warning
-- Returns false if shape is not one of the initial shapes
-- added to this algorithm.
Modified(me; shape: Shape from TopoDS) returns Shape from TopoDS
---Purpose: Gives a modifieded shape
-- Raises NoSuchObject if shape has not been modified
---C++: return const &
raises
NoSuchObject from Standard;
Dump(me);
---Purpose: Dump properties of resulting shape.
fields
mySewing : Sewing from BRepBuilderAPI;
end FindContigousEdges;
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