-- File:	EdgeStatus.cdl
-- Created:	Tue Feb 18 10:36:07 1992
-- Author:	Christophe MARION
--		<cma@sdsun1>
---Copyright:	 Matra Datavision 1992

class EdgeStatus from HLRAlgo

	---Purpose: This class describes the Hidden  Line status of an
	--          Edge. It contains :
	--          
	--            The Bounds of the Edge and their tolerances
	--            
	--            Two flags indicating if the edge is full visible
	--            or full hidden.
	--
	--            The Sequence  of visible Intervals  on the Edge.

uses
    Integer   from Standard,
    ShortReal from Standard,
    Real      from Standard,
    Boolean   from Standard,
    Intervals from Intrv
    
raises
    OutOfRange

is
    Create returns EdgeStatus from HLRAlgo;
    
    Create(Start    : Real      from Standard;
           TolStart : ShortReal from Standard;
           End      : Real      from Standard;
           TolEnd   : ShortReal from Standard)
    returns EdgeStatus from HLRAlgo;
	---Purpose: Creates a  new  EdgeStatus.  Default visible.  The
	--          Edge is   bounded by the  interval  <Start>, <End>
	--          with the tolerances <TolStart>, <TolEnd>.
	
    Initialize(me : in out;
               Start    : Real      from Standard;
               TolStart : ShortReal from Standard;
               End      : Real      from Standard;
               TolEnd   : ShortReal from Standard)
	---Purpose: Initialize  an  EdgeStatus.  Default visible.  The
	--          Edge is   bounded by the  interval  <Start>, <End>
	--          with the tolerances <TolStart>, <TolEnd>.
    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;
    
    NbVisiblePart(me) returns Integer from Standard
    is static;
    
    VisiblePart(me; Index    :     Integer   from Standard;
                    Start    : out Real      from Standard;
                    TolStart : out ShortReal from Standard;
                    End      : out Real      from Standard;
                    TolEnd   : out ShortReal from Standard)
    is static;
    
    Hide(me : in out; Start      : Real      from Standard;
                      TolStart   : ShortReal from Standard;
                      End        : Real      from Standard;
                      TolEnd     : ShortReal from Standard;
    	    	      OnFace     : Boolean   from Standard;
                      OnBoundary : Boolean   from Standard) 
	---Purpose: Hides  the  interval  <Start>,    <End>   with the
	--          tolerances <TolStart>,  <TolEnd>. This interval is
	--          subtracted from the visible  parts.  If the hidden
	--          part is on ( or under ) the face the flag <OnFace>
	--          is True ( or False ).  If the hidden  part is on (
	--          or  inside  ) the boundary  of  the  face the flag
	--          <OnBoundary> is True ( or False ).
    is static;
    
    HideAll(me : in out)
    	---C++: inline
	---Purpose: Hide the whole Edge.
    is static;

    ShowAll(me : in out)
    	---C++: inline
	---Purpose: Show the whole Edge.
    is static;

    AllHidden(me) returns Boolean from Standard
    	---C++: inline
    is static;

    AllHidden(me : in out; B : Boolean from Standard)
    	---C++: inline
    is static;

    AllVisible(me) returns Boolean from Standard
    	---C++: inline
    is static;

    AllVisible(me : in out; B : Boolean from Standard)
    	---C++: inline
    is static;

fields
    myStart       : Real      from Standard;
    myEnd         : Real      from Standard;
    myTolStart    : ShortReal from Standard;
    myTolEnd      : ShortReal from Standard;
    myFlags       : Boolean   from Standard;
    myVisibles    : Intervals from Intrv;

end EdgeStatus;