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

deferred class CompositeClassifier from BOP inherits LoopClassifier from BOP

    ---Purpose:  
    --  The Root class for algorithms  
    --  to   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 BOP,
    BlockBuilder from BOP
    
is

    Initialize(BB : BlockBuilder from BOP);
    	---Purpose:  
    	--- Initializing the object with BlockBuilder;   
    	---
    Compare(me :out;  
    	L1 : Loop from BOP;  
    	L2 : Loop from BOP)  
    	returns State from TopAbs
    	is redefined;
    	---Purpose:  
    	--- Classify loop <L1> with  <L2>  
    	---
    CompareShapes(me :out;  
    	B1 : Shape from TopoDS;
    	B2 : Shape from TopoDS)
    	---Purpose:  
    	--- Classify shape <B1> with shape <B2>
    	---
	returns State from TopAbs  
    	is deferred;
    
    CompareElementToShape(me :out;  
    	E : Shape from TopoDS;
    	B : Shape from TopoDS) 
    	returns State from TopAbs  
    	is deferred;
    	---Purpose:  
    	--- Classify element <E> with shape <B>
    	---
    ResetShape(me :out;  
    	B : Shape from TopoDS)  
    	is deferred;
    	---Purpose:  
    	--- Prepare classification involving shape <B>
    	--- Calls ResetElement on first element of <B>
	---
    
    ResetElement(me :out;  
    	E : Shape from TopoDS)  
    	is deferred;
    	---Purpose:  
    	--- Prepare classification involving element <E>.
    	---
    CompareElement(me :out;  
    	E : Shape from TopoDS)  
    	is deferred;
    	---Purpose:  
    	--- Add element <E> in the set of elements used in classification.
    	---
    State(me :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; 

end CompositeClassifier;