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-- File: BRepOffsetAPI_MakeThickSolid.cdl
-- Created: Tue Feb 13 11:00:32 1996
-- Author: Yves FRICAUD
-- <yfr@stylox>
---Copyright: Matra Datavision 1996
class MakeThickSolid from BRepOffsetAPI inherits MakeOffsetShape from BRepOffsetAPI
---Purpose: Describes functions to build hollowed solids.
-- A hollowed solid is built from an initial solid and a set of
-- faces on this solid, which are to be removed. The
-- remaining faces of the solid become the walls of the
-- hollowed solid, their thickness defined at the time of construction.
-- the solid is built from an initial
-- solid <S> and a set of faces {Fi} from <S>,
-- builds a solid composed by two shells closed by
-- the {Fi}. First shell <SS> is composed by all
-- the faces of <S> expected {Fi}. Second shell is
-- the offset shell of <SS>.
-- A MakeThickSolid object provides a framework for:
-- - defining the cross-section of a hollowed solid,
-- - implementing the construction algorithm, and
-- - consulting the result.
uses
MakeOffset from BRepOffset,
Mode from BRepOffset,
Shape from TopoDS,
Face from TopoDS,
ListOfShape from TopTools,
JoinType from GeomAbs
is
Create returns MakeThickSolid from BRepOffsetAPI;
Create ( S : Shape from TopoDS;
ClosingFaces : ListOfShape from TopTools;
Offset : Real from Standard;
Tol : Real from Standard ;
Mode : Mode from BRepOffset = BRepOffset_Skin;
Intersection : Boolean from Standard = Standard_False;
SelfInter : Boolean from Standard = Standard_False;
Join : JoinType from GeomAbs = GeomAbs_Arc)
---Purpose: Constructs a hollowed solid from
-- the solid S by removing the set of faces ClosingFaces from S, where:
-- Offset defines the thickness of the walls. Its sign indicates
-- which side of the surface of the solid the hollowed shape is built on;
-- - Tol defines the tolerance criterion for coincidence in generated shapes;
-- - Mode defines the construction type of parallels applied to free
-- edges of shape S. Currently, only one construction type is
-- implemented, namely the one where the free edges do not generate
-- parallels; this corresponds to the default value BRepOffset_Skin;
-- Intersection specifies how the algorithm must work in order to
-- limit the parallels to two adjacent shapes:
-- - if Intersection is false (default value), the intersection
-- is calculated with the parallels to the two adjacent shapes,
-- - if Intersection is true, the intersection is calculated by
-- taking account of all parallels generated; this computation
-- method is more general as it avoids self-intersections
-- generated in the offset shape from features of small dimensions
-- on shape S, however this method has not been completely
-- implemented and therefore is not recommended for use;
-- - SelfInter tells the algorithm whether a computation to
-- eliminate self-intersections needs to be applied to the
-- resulting shape. However, as this functionality is not yet
-- implemented, you should use the default value (false);
-- - Join defines how to fill the holes that may appear between
-- parallels to the two adjacent faces. It may take values
-- GeomAbs_Arc or GeomAbs_Intersection:
-- - if Join is equal to GeomAbs_Arc, then pipes are generated
-- between two free edges of two adjacent parallels,
-- and spheres are generated on "images" of vertices;
-- it is the default value,
-- - if Join is equal to GeomAbs_Intersection,
-- then the parallels to the two adjacent faces are
-- enlarged and intersected, so that there are no free
-- edges on parallels to faces.
-- Warnings
-- Since the algorithm of MakeThickSolid is based on
-- MakeOffsetShape algorithm, the warnings are the same as for
-- MakeOffsetShape.
returns MakeThickSolid from BRepOffsetAPI;
Build (me : in out)
is redefined;
---Purpose: Builds the resulting shape (redefined from MakeOffsetShape).
---Level: Public
Modified (me: in out; S : Shape from TopoDS)
---Purpose: Returns the list of shapes modified from the shape
-- <S>.
---C++: return const &
---Level: Public
returns ListOfShape from TopTools
is redefined virtual;
end MakeThickSolid;
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