-- -- File:	TopLoc.cdl
-- Created:	Wed Dec 19 16:25:49 1990
-- Author:	Christophe MARION
--		<cma@topsn3>
---Copyright:	 Matra Datavision 1990


package TopLoc 

    ---Level : Public. 
    --  All methods of all  classes will be public.

    ---Purpose: The TopLoc package gives ressources to handle 3D local
    --          coordinate systems called Locations.
    --          
    --          A Location  is a composition of  elementary coordinate
    --          systems,  each one is  called a  Datum.   The Location
    --          keeps track of  this composition.
    --          
    
uses
    Standard,
    MMgt,
    TCollection,
    gp

is
    pointer TrsfPtr to Trsf from gp;
    class Datum3D;
	---Purpose: An elementary 3D coordinate system.
    
    private class ItemLocation;
	---Purpose: Used to implement  the Location. A  Datum3D with a
	--          power elevation.
	
    private class SListOfItemLocation instantiates 
    	SList from TCollection(ItemLocation from TopLoc);
	---Purpose: Used to implement the Location.
    
    class Location;
	---Purpose: A  Local Coordinate System.   A list of elementary
	--          Datums.

    class MapLocationHasher instantiates
    	  MapHasher from TCollection(Location from TopLoc); 
	  
    class MapOfLocation instantiates
    	  Map from TCollection(Location          from TopLoc,
	    	    	       MapLocationHasher from TopLoc);
    	
    class IndexedMapOfLocation instantiates
    	  IndexedMap from TCollection(Location          from TopLoc,
	    	 		      MapLocationHasher from TopLoc);
    	
end TopLoc;