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-- File:	Interval.cdl
-- Created:	Fri Dec 13 14:22:13 1991
-- Author:	Christophe MARION
--		<cma@sdsun1>
---Copyright:	 Matra Datavision 1991

class Interval from Intrv
    	---Purpose:
    	--               **-----------****             Other
    	--   ***---*                                   IsBefore
    	--   ***----------*                            IsJustBefore
    	--   ***---------------*                       IsOverlappingAtStart
    	--   ***------------------------*              IsJustEnclosingAtEnd
    	--   ***-----------------------------------*   IsEnclosing
    	--              ***----*                       IsJustOverlappingAtStart
    	--              ***-------------*              IsSimilar
    	--              ***------------------------*   IsJustEnclosingAtStart
    	--                     ***-*                   IsInside
    	--                     ***------*              IsJustOverlappingAtEnd
    	--                     ***-----------------*   IsOverlappingAtEnd
    	--                              ***--------*   IsJustAfter
    	--                                   ***---*   IsAfter


uses
    Real      from Standard,
    ShortReal from Standard,
    Integer   from Standard,
    Position  from Intrv

is
    Create returns Interval from Intrv;

    Create(Start, End : Real from Standard) returns Interval from Intrv;

    Create(Start    : Real      from Standard;
           TolStart : ShortReal from Standard;
           End      : Real      from Standard;
           TolEnd   : ShortReal from Standard) 
    returns Interval from Intrv;
   
    Start(me) returns Real from Standard
    	---C++: inline
    is static;
    
    End(me) returns Real from Standard
    	---C++: inline
    is static;   
    
    TolStart(me) returns ShortReal from Standard
    	---C++: inline
    is static;
    
    TolEnd(me) returns ShortReal from Standard
    	---C++: inline
    is static;   
    
    Bounds(me; Start    : out Real      from Standard;
               TolStart : out ShortReal from Standard;
               End      : out Real      from Standard;
               TolEnd   : out ShortReal from Standard)
    	---C++: inline
    is static;
   
    SetStart(me : in out; Start    : Real      from Standard;
                          TolStart : ShortReal from Standard)
    	---C++: inline
    is static;
    
    FuseAtStart(me : in out; Start    : Real      from Standard;
                             TolStart : ShortReal from Standard)
    	---C++: inline
    	---Purpose:
    	--             ****+****-------------------->      Old one
    	--         ****+****------------------------>      New one to fuse
    	--         <<<     <<<
    	--         ****+****------------------------>      result      
    is static;
    
    CutAtStart(me : in out; Start    : Real      from Standard;
                            TolStart : ShortReal from Standard)
    	---C++: inline
    	---Purpose:
    	--                      ****+****----------->      Old one
    	--         <----------**+**                        Tool for cutting
    	--                    >>>     >>>
    	--                      ****+****----------->      result      
    is static;

    SetEnd(me : in out; End      : Real      from Standard;
                        TolEnd   : ShortReal from Standard)
    	---C++: inline
    is static;   

    FuseAtEnd(me : in out; End      : Real      from Standard;
                           TolEnd   : ShortReal from Standard)
    	---C++: inline
    	---Purpose:
    	--         <---------------------****+****      Old one
    	--         <-----------------**+**              New one to fuse
    	--                             >>>     >>>
    	--         <---------------------****+****      result      
    is static;   

    CutAtEnd(me : in out; End      : Real      from Standard;
                          TolEnd   : ShortReal from Standard)
    	---C++: inline
    	---Purpose:
    	--         <-----****+****                      Old one
    	--                     **+**------>             Tool for cutting
    	--               <<<     <<<
    	--         <-----****+****                      result      
    is static;   

    IsProbablyEmpty(me) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if myStart+myTolStart > myEnd-myTolEnd
    	--            or if myEnd+myTolEnd > myStart-myTolStart
    is static;

    Position(me; Other : Interval from Intrv) returns Position from Intrv
    	---Purpose: True if me is Before Other
    	--                 **-----------****             Other
    	--   ***-----*                                   Before
    	--   ***------------*                            JustBefore
    	--   ***-----------------*                       OverlappingAtStart
    	--   ***--------------------------*              JustEnclosingAtEnd
    	--   ***-------------------------------------*   Enclosing
    	--                ***----*                       JustOverlappingAtStart
    	--                ***-------------*              Similar
    	--                ***------------------------*   JustEnclosingAtStart
    	--                       ***-*                   Inside
    	--                       ***------*              JustOverlappingAtEnd
    	--                       ***-----------------*   OverlappingAtEnd
    	--                                ***--------*   JustAfter
    	--                                     ***---*   After
    is static;

    IsBefore(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is Before Other
    	--          ***----------------**                              me 
    	--                                  **-----------****          Other
    is static;

    IsAfter(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is After Other
    	--                                  **-----------****          me
    	--          ***----------------**                              Other
    is static;

    IsInside(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is Inside Other
    	--                  **-----------****                          me
    	--          ***--------------------------**                    Other 
    is static;

    IsEnclosing(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is Enclosing Other
    	--        ***----------------------------****                  me
    	--              ***------------------**                        Other 
    is static;

    IsJustEnclosingAtStart(me; Other : Interval from Intrv) 
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just Enclosing Other at start
    	--               ***---------------------------****            me
    	--              ***------------------**                        Other 
    	is static;

    IsJustEnclosingAtEnd(me; Other : Interval from Intrv)
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just Enclosing Other at End
    	--        ***----------------------------****                  me
    	--                  ***-----------------****                   Other 
    is static;

    IsJustBefore(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just before Other
    	--        ***--------****                                      me
    	--                     ***-----------**                        Other 
    is static;

    IsJustAfter(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just after Other
    	--                     ****-------****                         me
    	--        ***-----------**                                     Other 
    is static;

    IsOverlappingAtStart(me; Other : Interval from Intrv) 
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is overlapping Other at start
    	--        ***---------------***                                me
    	--                     ***-----------**                        Other 
    is static;

    IsOverlappingAtEnd(me; Other : Interval from Intrv) 
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is overlapping Other at end
    	--                     ***-----------**                        me 
    	--        ***---------------***                                Other
    is static;

    IsJustOverlappingAtStart(me; Other : Interval from Intrv) 
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just overlapping Other at start
    	--        ***-----------***                                    me
    	--        ***------------------------**                        Other 
    is static;

    IsJustOverlappingAtEnd(me; Other : Interval from Intrv) 
    returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me is just overlapping Other at end
    	--                     ***-----------*                         me 
    	--        ***------------------------**                        Other 
    is static;

    IsSimilar(me; Other : Interval from Intrv) returns Boolean from Standard
    	---C++: inline
    	---Purpose: True if me and Other have the same bounds
    	--         *----------------***                                me 
    	--        ***-----------------**                               Other
    is static;

fields
    myStart    : Real      from Standard;
    myEnd      : Real      from Standard;
    myTolStart : ShortReal from Standard;
    myTolEnd   : ShortReal from Standard;

end;