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-- File: ShapeAnalysis_Shell.cdl
-- Created: Wed Jun 3 12:06:44 1998
-- Author: data exchange team
-- <det@nnov.matra-dtv.fr>
---Copyright: Matra Datavision 1998
class Shell from ShapeAnalysis
---Purpose: This class provides operators to analyze edges orientation
-- in the shell.
uses
Shape from TopoDS,
Compound from TopoDS,
IndexedMapOfShape from TopTools
is
Clear (me : in out);
---Purpose: Clears data about loaded shells and performed checks
LoadShells (me : in out; shape : Shape from TopoDS);
---Purpose: Adds shells contained in the <shape> to the list of loaded shells
CheckOrientedShells (me : in out; shape : Shape from TopoDS;
alsofree: Boolean = Standard_False;
checkinternaledges: Boolean = Standard_False)
returns Boolean;
---Purpose: Checks if shells fulfill orientation condition, i.e. if each
-- edge is, either present once (free edge) or twice (connected
-- edge) but with different orientations (FORWARD/REVERSED)
-- Edges which do not fulfill these conditions are bad
--
-- If <alsofree> is True free edges are considered.
-- Free edges can be queried but are not bad
IsLoaded (me; shape : Shape from TopoDS) returns Boolean;
---Purpose: Tells if a shape is loaded (only shells are checked)
NbLoaded (me) returns Integer;
---Purpose: Returns the actual number of loaded shapes (i.e. shells)
Loaded (me; num : Integer) returns Shape from TopoDS;
---Purpose: Returns a loaded shape specified by its rank number.
-- Returns null shape if <num> is out of range
HasBadEdges (me) returns Boolean;
---Purpose: Tells if at least one edge is recorded as bad
BadEdges (me) returns Compound from TopoDS;
---Purpose: Returns the list of bad edges as a Compound
-- It is empty (not null) if no edge are recorded as bad
HasFreeEdges (me) returns Boolean;
---Purpose: Tells if at least one edge is recorded as free (not connected)
FreeEdges (me) returns Compound from TopoDS;
---Purpose: Returns the list of free (not connected) edges as a Compound
-- It is empty (not null) if no edge are recorded as free
HasConnectedEdges (me) returns Boolean;
---Purpose: Tells if at least one edge is connected (shared twice or more)
fields
myShells: IndexedMapOfShape from TopTools;
myBad : IndexedMapOfShape from TopTools;
myFree : IndexedMapOfShape from TopTools;
myConex : Boolean; -- are there or not
end Shell;
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