-- File:	BRepFeat_SplitShape.cdl
-- Created:	Mon Sep  4 09:48:52 1995
-- Author:	Jacques GOUSSARD
--		<jag@bravox>
---Copyright:	 Matra Datavision 1995


class SplitShape from BRepFeat inherits MakeShape from BRepBuilderAPI

	---Purpose: One of the most significant aspects of BRepFeat functionality is the use of local
    	-- operations as opposed to global ones. In a global operation, you would first construct a
    	-- form of the type you wanted in your final feature, and then remove matter so that it could
    	-- fit into your initial basis object. In a local operation, however, you specify the domain of
    	-- the feature construction with aspects of the shape on which the feature is being created.
    	-- These semantics are expressed in terms of a member shape of the basis shape from which -
    	-- or up to which - matter will be added or removed. As a result, local operations make
    	-- calculations simpler and faster than global operations.
    	-- In BRepFeat, the semantics of local operations define features constructed from a contour or a
    	-- part of the basis shape referred to as the tool. In a SplitShape object, wires or edges of a
    	-- face in the basis shape to be used as a part of the feature are cut out and projected to a plane
    	-- outside or inside the basis shape. By rebuilding the initial shape incorporating the edges and
    	-- the faces of the tool, protrusion or depression features can be constructed.


uses Spliter           from LocOpe,
     WiresOnShape      from LocOpe,
     Shape             from TopoDS,
     Face              from TopoDS,
     Wire              from TopoDS,
     Edge              from TopoDS,
     Vertex            from TopoDS,
     ListOfShape       from TopTools,
     ShapeModification from BRepBuilderAPI

raises NotDone           from StdFail,
       ConstructionError from Standard,
       NoSuchObject      from Standard

is


    Create
    	---Purpose: Empty constructor
    	returns SplitShape from BRepFeat;
	---C++: inline      


    Create(S: Shape from TopoDS)
	---Purpose: Creates the process  with the shape <S>.
    	returns SplitShape from BRepFeat;
	---C++: inline      


    Init(me: in out; S: Shape from TopoDS)
	---Purpose: Initializes the process on the shape <S>.
	---C++: inline      
    	is static;


    Add(me: in out; W: Wire from TopoDS;
    	            F: Face from TopoDS)
	---Purpose: Adds the wire <W> on the face <F>.
    	-- Raises NoSuchObject  if <F> does not belong to the original shape.
    	---C++: inline
    	raises NoSuchObject from Standard,
	       ConstructionError from Standard

	is static;
    


    Add(me: in out; E: Edge from TopoDS;
    	            F: Face from TopoDS)
	---Purpose: Adds the edge <E> on the face <F>.
	---C++: inline      
    	raises NoSuchObject from Standard,
	       -- if <F> does not belong to the original shape.
	       ConstructionError from Standard

	is static;
    


    Add(me: in out; E  : Edge from TopoDS;
    	            EOn: Edge from TopoDS)
	---Purpose: Adds the edge <E> on the existing edge <EOn>.
	---C++: inline      
    	raises NoSuchObject from Standard,
	       -- if <EOn> does not belong to the original shape.
	       ConstructionError from Standard

	is static;
	
	
    DirectLeft(me)
	---Purpose: Returns  the faces   which  are the  left of   the
	--          projected wires.
    	returns ListOfShape from TopTools
	---C++: return const&
	raises NotDone from StdFail
	--- The exception is raised when IsDone returns <Standard_False>.
	is static;


    Left(me)
	---Purpose: Returns the faces of the "left" part on the shape.
	--          (It  is build   from  DirectLeft,  with  the faces
	--          connected to this set, and so on...).
    	-- Raises NotDone if IsDone returns <Standard_False>.
    	---C++: return const&
    	returns ListOfShape from TopTools
	raises NotDone from StdFail
	is static;


--- Methods inherited from MakeShape, that must be redefined.


    Build(me: in out)
    
    	is redefined static;
    	--- Purpose: Builds the cut and the resulting faces and edges as well. 
    IsDeleted (me: in out; S : Shape from TopoDS)
    returns Boolean
    is redefined;
    	---Purpose: Returns true if the shape has been deleted.
    
    Modified(me: in out; F: Shape from TopoDS)
    	---Purpose: Returns the list of generated Faces.
 	---C++:     return const &
    returns ListOfShape from TopTools
    is redefined static;
    
fields

    mySShape   : Spliter      from LocOpe;
    myWOnShape : WiresOnShape from LocOpe;

end SplitShape;