-- File:	TopOpeBRepBuild_CompositeClassifier.cdl
-- Created:	Fri Jan  5 15:16:22 1996
-- Author:	Jean Yves LEBEY
--		<jyl@meteox>
---Copyright:	 Matra Datavision 1996

deferred class CompositeClassifier from TopOpeBRepBuild
    inherits LoopClassifier from TopOpeBRepBuild

---Purpose: 
-- classify composite Loops, i.e, loops that can be either a Shape, or
-- a block of Elements.

uses
    
    ShapeEnum from TopAbs,
    Shape from TopoDS,
    State from TopAbs,
    Loop from TopOpeBRepBuild,
    BlockBuilder from TopOpeBRepBuild
    
is

    Initialize(BB : BlockBuilder);

    Compare(me : in out; L1,L2 : Loop) returns State from TopAbs
    is redefined;

    CompareShapes(me : in out; B1,B2 : Shape from TopoDS)
    ---Purpose: classify shape <B1> with shape <B2>
    returns State from TopAbs is deferred;
    
    CompareElementToShape(me : in out; E,B : Shape from TopoDS)
    ---Purpose: classify element <E> with shape <B>
    returns State from TopAbs is deferred;
    
    ResetShape(me : in out; B : Shape from TopoDS) is deferred;
    ---Purpose: prepare classification involving shape <B>
    -- calls ResetElement on first element of <B>
    
    ResetElement(me : in out; E : Shape from TopoDS) is deferred;
    ---Purpose: prepare classification involving element <E>.
    
    CompareElement(me : in out; E : Shape from TopoDS) is deferred;
    ---Purpose: Add element <E> in the set of elements used in classification.
    
    State(me : in out) returns State from TopAbs is deferred;
    ---Purpose: Returns state of classification of 2D point, defined by 
    -- ResetElement, with the current set of elements, defined by Compare.

fields

    myBlockBuilder : Address is protected; -- (TopOpeBRepBuild_BlockBuilder*)

end CompositeClassifier from TopOpeBRepBuild;