-- File:	HLRBRep_AreaLimit.cdl
-- Created:	Thu Apr 17 20:21:04 1997
-- Author:	Christophe MARION
--		<cma@partox.paris1.matra-dtv.fr>
---Copyright:	 Matra Datavision 1997

class AreaLimit from HLRBRep inherits TShared from MMgt 

    ---Purpose: The  private  nested class AreaLimit represents   a --
    --          vertex on  the Edge with the  state on the left and --
    --          the right.
	
uses
    Orientation  from TopAbs,
    State        from TopAbs,
    Intersection from HLRAlgo

is

Create(V            : Intersection from HLRAlgo;
       Boundary     : Boolean      from Standard;
       Interference : Boolean      from Standard;
       StateBefore  : State        from TopAbs;
       StateAfter   : State        from TopAbs;
       EdgeBefore   : State        from TopAbs;
       EdgeAfter    : State        from TopAbs)
returns mutable AreaLimit from HLRBRep;
    ---Purpose: The previous and next field are set to NULL.
    
StateBefore(me : mutable; St : State from TopAbs)
is static;

StateAfter(me : mutable; St : State from TopAbs)
is static;

EdgeBefore(me : mutable; St : State from TopAbs)
is static;

EdgeAfter(me : mutable; St : State from TopAbs)
is static;
	
Previous(me : mutable; P : AreaLimit from HLRBRep)
is static;

Next(me : mutable; N : AreaLimit from HLRBRep)
is static;

Vertex(me) returns Intersection from HLRAlgo
    ---C++: return const &
is static;
	    
IsBoundary(me) returns Boolean from Standard
is static;
	
IsInterference(me) returns Boolean from Standard
is static;
	
StateBefore(me) returns State from TopAbs
is static;

StateAfter(me) returns State from TopAbs
is static;
	
EdgeBefore(me) returns State from TopAbs
is static;

EdgeAfter(me) returns State from TopAbs
is static;

Previous(me) returns mutable AreaLimit from HLRBRep
is static;

Next(me) returns mutable AreaLimit from HLRBRep
is static;
	
Clear(me : mutable)
is static;

fields
    myVertex       : Intersection from HLRAlgo;
    myBoundary     : Boolean      from Standard;
    myInterference : Boolean      from Standard;
    myStateBefore  : State        from TopAbs;
    myStateAfter   : State        from TopAbs;
    myEdgeBefore   : State        from TopAbs;
    myEdgeAfter    : State        from TopAbs;
    myPrevious     : AreaLimit    from HLRBRep;
    myNext         : AreaLimit    from HLRBRep;
	
end AreaLimit;