-- Created on: 1993-05-27
-- Created by: Yves FRICAUD
-- Copyright (c) 1993-1999 Matra Datavision
-- Copyright (c) 1999-2012 OPEN CASCADE SAS
--
-- The content of this file is subject to the Open CASCADE Technology Public
-- License Version 6.5 (the "License"). You may not use the content of this file
-- except in compliance with the License. Please obtain a copy of the License
-- at http://www.opencascade.org and read it completely before using this file.
--
-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
--
-- The Original Code and all software distributed under the License is
-- distributed on an "AS IS" basis, without warranty of any kind, and the
-- Initial Developer hereby disclaims all such warranties, including without
-- limitation, any warranties of merchantability, fitness for a particular
-- purpose or non-infringement. Please see the License for the specific terms
-- and conditions governing the rights and limitations under the License.




class Zone from MAT 

	---Purpose: 
	--          Definition of Zone of Proximity of a BasicElt :
        --          ----------------------------------------------
        --          A Zone of proximity is the set of the points which are
        --          more near from the BasicElt than any other.
        --          
    
inherits 

    TShared from MMgt

uses
    Arc            from MAT,
    Side           from MAT,
    SequenceOfArc  from MAT,
    BasicElt       from MAT,
    Node           from MAT
is

    Create returns mutable Zone from MAT;
    
    Create(aBasicElt : BasicElt from MAT)
        --- Purpose: Compute the frontier of the Zone of proximity.
    returns mutable Zone from MAT;
    	
    Perform(me : mutable ; aBasicElt : BasicElt from MAT)
        --- Purpose: Compute the frontier of the Zone of proximity.
    is static;
    
    NumberOfArcs(me) 
	--- Purpose: Return the number Of Arcs On the frontier of <me>.
    returns Integer
    is static;

    ArcOnFrontier (me ; Index : Integer)
	--- Purpose: Return the  Arc number <Index>  on the frontier.
	--  of  <me>.
    returns Arc
    is static;
    
    NoEmptyZone (me)
	--- Purpose: Return TRUE if <me> is not empty .
    returns Boolean
    is static;
    
    Limited(me)
    	--- Purpose: Return TRUE if <me> is Limited.
    returns Boolean
    is static;
    
    NodeForTurn(me ; 
                anArc     : Arc      from MAT ;
                aBasicElt : BasicElt from MAT ;
		aSide     : Side     from MAT )
    returns Node from MAT
    is static private;
    
fields
    frontier  : SequenceOfArc from MAT;
    limited   : Boolean        from Standard;
end Zone;