-- File:	BRepAlgo_Image.cdl
-- Created:	Thu Oct 26 14:31:50 1995
-- Author:	Yves FRICAUD
--		<yfr@stylox>
---Copyright:	 Matra Datavision 1995


class Image from BRepAlgo

	---Purpose: Stores link between a shape <S> and a shape <NewS>
 	--          obtained from <S>. <NewS> is an image of <S>.

uses
    Shape                     from TopoDS,
    ShapeEnum                 from TopAbs,	
    ListOfShape               from TopTools,
    DataMapOfShapeListOfShape from TopTools,
    DataMapOfShapeShape       from TopTools

raises
    ConstructionError from Standard
    
is
    Create;
    
    SetRoot (me : in out; S : Shape from TopoDS)
    is static;
    
    
    Bind (me : in out; OldS : Shape from TopoDS;
	               NewS : Shape from TopoDS)				         
    	---Purpose: Links <NewS> as image of <OldS>.
    raises 
	ConstructionError -- if Olds has image.    
    is static;
    

    Bind (me : in out; OldS : Shape       from TopoDS;
	               NewS : ListOfShape from TopTools)
    	---Purpose: Links <NewS> as image of <OldS>.
    raises 
	ConstructionError -- if Olds has image.    
    is static;
    

    Add (me : in out;  OldS : Shape from TopoDS;
	               NewS : Shape from TopoDS)
    	---Purpose: Add <NewS> to the image of <OldS>.		       
    raises 
	ConstructionError -- if Olds has not image.    
    is static;
    
    
    Add (me : in out; OldS : Shape       from TopoDS;
	              NewS : ListOfShape from TopTools)
    	---Purpose: Add <NewS> to the image of <OldS>.		       
    raises 
	ConstructionError -- if Olds has not image.    
    is static;
    
    Clear(me : in out)
    is static;
    
    Remove(me : in out;  S : Shape from TopoDS)
        ---Purpose: Remove <S> to set of images.
    raises 
	ConstructionError -- if S is not an image.    
    is static;

    Roots (me)
    	---C++: return const &
    returns ListOfShape from TopTools
    is static;
    
    IsImage (me; S : Shape from TopoDS) 
    returns Boolean from Standard
    is static;
    
    ImageFrom (me; S : Shape from TopoDS) 
    	---Purpose: Returns the generator of <S>
        ---C++: return const &
    returns Shape from TopoDS  
    is static;
    
    Root (me; S : Shape from TopoDS) 
    	---Purpose: Returns the upper generator of <S>
        ---C++: return const &
    returns Shape from TopoDS  
    is static;
    
    HasImage (me; S : Shape from TopoDS) 
    returns Boolean from Standard
    is static;
    
    Image (me; S : Shape from TopoDS) 
    	---Purpose: Returns the Image of <S>.
    	--          Returns <S> in the list if HasImage(S) is false.
        ---C++: return const &      
    returns ListOfShape from TopTools
    is static;
   
    LastImage (me; S :        Shape from TopoDS;
                   L : in out ListOfShape from TopTools) 
    	---Purpose: Stores in <L> the images of images of...images of <S>.
    	--          <L> contains only <S> if  HasImage(S) is false.
    is static;
    
    Compact (me : in out)
    	---Purpose:  Keeps only the link between roots and lastimage.
    is static;

    Filter (me        : in out; 
    	    S         : Shape     from TopoDS;
    	    ShapeType : ShapeEnum from TopAbs);
	---Purpose: Deletes in the images the shape of type <ShapeType>
	--          which are not in <S>.
	--  Warning:  Compact() must be call before.
	        	        
fields

    roots : ListOfShape               from TopTools;
    up    : DataMapOfShapeShape       from TopTools;
    down  : DataMapOfShapeListOfShape from TopTools;
    
end Image;