-- File:	TopOpeBRepBuild_Loop.cdl
-- Created:	Tue Dec 19 19:44:23 1995
-- Author:	Jean Yves LEBEY
--		<jyl@meteox>
---Copyright:	 Matra Datavision 1995

class Loop from TopOpeBRepBuild inherits TShared from MMgt

---Purpose: 
-- a Loop is an existing shape (Shell,Wire) or a set
-- of shapes (Faces,Edges) which are connex.
-- a set of connex shape is represented by a BlockIterator

uses

    Shape from TopoDS,
    BlockIterator from TopOpeBRepBuild,
    ShapeEnum from TopAbs

is

    Create(S : Shape from TopoDS) returns mutable Loop;
    Create(BI : BlockIterator) returns mutable Loop;
	
    IsShape(me) returns Boolean from Standard is virtual;

    Shape(me) returns Shape from TopoDS is virtual;
    ---C++: return const &
    -- only when IsShape() is true
    
    BlockIterator(me) returns BlockIterator is static;
    ---C++: return const &
    -- only when IsShape() is false

    Dump(me) is virtual;	

fields

    myIsShape       : Boolean from Standard is protected;
    myShape         : Shape from TopoDS     is protected;
    myBlockIterator : BlockIterator         is protected;

end Loop from TopOpeBRepBuild;