-- File:	BRepAlgo_BooleanOperations.cdl
-- Created:	Thu Oct 14 18:14:43 1993
-- Author:	Prestataire Mary FABIEN
--		<fbi@langdox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1993

class BooleanOperations from BRepAlgo

uses

    State from TopAbs,
    Shape from TopoDS,
    Face from TopoDS,
    Edge from TopoDS,
    MapOfShape from TopTools,
    ListOfShape from TopTools,
    HBuilder from TopOpeBRepBuild,
    HDataStructure from TopOpeBRepDS,
    DSAccess from BRepAlgo
    
is

    Create returns BooleanOperations from BRepAlgo;
    
    Shapes2d(me : in out; S1,S2 : Shape from TopoDS);
    ---Purpose: S1 is a Shell with ALL faces supported by the SAME S2 is 
    --          an Edge INCLUDED in that surface with pcurve.
    --          this avoids a time-consuming 3D operation, compared to Shapes.

    Shapes(me : in out; S1,S2 : Shape from TopoDS);
    ---Purpose: Defines the arguments.

    SetApproxParameters(me : in out; NbPntMax : Integer from Standard;
                                     Tol3D, Tol2D : Real from Standard;
                                     RelativeTol : Boolean from Standard);
    ---Purpose: Sets different parameters for the curve approximations :
    --          NbPntMax : Maximum number of points to be approximated at
    --                     the same time in one curve.
    --          Tol3D, Tol2D : Tolerances to be reached by the approximation.
    --          RelativeTol : The given tolerances are relative.

    Perform(me : in out)
    ---Purpose: Performs the global boolean operation.
    is private ;

    Perform(me : in out; State1, State2 : State from TopAbs)
    ---Purpose: Performs the global boolean operation and build the
    --          result in regards of the given states.
    is private ;

    Define(me : in out; S1,S2 : Shape from TopoDS;
    	    	    	HDS : in out HDataStructure from TopOpeBRepDS);
    ---Purpose: 
    
    Common(me : in out)
    ---Purpose: returns the common part of the shapes.
    ---C++: return const &
    returns Shape from TopoDS;
    
    Fus(me : in out)
    ---Purpose: returns the fuse part of the shapes.
    ---C++: return const &
    returns Shape from TopoDS;
    
    Cut(me : in out)
    ---Purpose: returns the cut part of the shapes.
    ---C++: return const &
    returns Shape from TopoDS;
    
    Section(me : in out)
    ---Purpose: returns the intersection of the shapes.
    ---C++: return const &
    returns Shape from TopoDS;
    
    Shape(me : in out)
    ---Purpose: returns the result of the boolean operation.
    ---C++: return const &
    returns Shape from TopoDS;

    ShapeFrom(me : in out; S : Shape from TopoDS)
    ---Purpose: Returns the shape(s) resulting of the boolean operation
    --          issued from the shape <S>.
    ---C++: return const &
    returns Shape from TopoDS ;

    Modified (me: in out; S : Shape from TopoDS)
    ---Purpose: Returns the list of the descendant shapes of the shape <S>.
    ---C++: return const & 
    returns ListOfShape from TopTools ;

    IsDeleted (me: in out; S : Shape from TopoDS)
    ---Purpose: Returns the fact that the shape <S> has been deleted or not
    --          by the boolean operation.
    returns Boolean;

    DataStructure(me) returns HDataStructure from TopOpeBRepDS;
    ---C++: return const &

    ChangeDataStructure(me : in out) returns HDataStructure from TopOpeBRepDS;
    ---C++: return &

    Builder(me) returns HBuilder from TopOpeBRepBuild;
    ---C++: return const &

    ChangeBuilder(me : in out) returns HBuilder from TopOpeBRepBuild;
    ---C++: return &
    --      
    DataStructureAccess(me : in out) returns DSAccess from BRepAlgo;
    ---Purpose: returns the member myDSA. It is useful to then access
    --          the method GetSectionEdgeSet (wich is a member of DSAccess)
    ---C++: return &


fields

    myDSA : DSAccess from BRepAlgo;
    myS1 : Shape from TopoDS;
    myS2 : Shape from TopoDS;
    myShape : Shape from TopoDS;
    myMapShape : MapOfShape from TopTools;
--    myModified : ListOfShape from TopTools;
    myResult : Shape from TopoDS;
    myApproxNbPntMax : Integer from Standard;
    myApproxTol3D : Real from Standard;
    myApproxTol2D : Real from Standard;
    myApproxRelativeTol : Boolean from Standard;

end BooleanOperations from BRepAlgo;