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--
-- File : Shell.cdl
-- Created : Sat 9 Jan 1993
-- Author : CKY / Contract Toubro-Larsen ( SIVA )
--
---Copyright : MATRA-DATAVISION 1993
--
class Shell from IGESSolid inherits IGESEntity
---Purpose: defines Shell, Type <514> Form Number <1>
-- in package IGESSolid
-- Shell entity is a connected entity of dimensionality 2
-- which divides R3 into two arcwise connected open subsets,
-- one of which is finite. Inside of the shell is defined to
-- be the finite region.
-- From IGES-5.3, Form can be <1> for Closed or <2> for Open
uses
Face from IGESSolid,
HArray1OfFace from IGESSolid,
HArray1OfInteger from TColStd
raises DimensionMismatch, OutOfRange
is
Create returns mutable Shell;
-- Specific Methods pertaining to the class
Init (me : mutable;
allFaces : HArray1OfFace;
allOrient : HArray1OfInteger)
raises DimensionMismatch;
---Purpose : This method is used to set the fields of the class Shell
-- - allFaces : the faces comprising the shell
-- - allOrient : the orientation flags of the shell
-- raises exception if length of allFaces & allOrient do not match
IsClosed (me) returns Boolean;
---Purpose : Tells if a Shell is Closed, i.e. if its FormNumber is 1
-- (this is the default)
SetClosed (me : mutable; closed : Boolean);
---Purpose : Sets or Unsets the Closed status (FormNumber = 1 else 2)
NbFaces (me) returns Integer;
---Purpose : returns the number of the face entities in the shell
Face (me; Index : Integer) returns Face
raises OutOfRange;
---Purpose : returns the Index'th face entity of the shell
-- raises exception if Index <= 0 or Index > NbFaces()
Orientation (me; Index : Integer) returns Boolean
raises OutOfRange;
---Purpose : returns the orientation of Index'th face w.r.t the direction of
-- the underlying surface
-- raises exception if Index <= 0 or Index > NbFaces()
fields
--
-- Class : IGESSolid_Shell
--
-- Purpose : Declaration of variables specific to the definition
-- of the Class Shell.
--
-- Reminder : A Shell instance is defined by :
-- a number of face entities defined with their orientation
-- with respect to the direction of the underlying surface
theFaces : HArray1OfFace;
-- the faces comprising the shell
theOrientation : HArray1OfInteger;
-- the orientation of the corresponding face
end Shell;
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