-- File:	PrsMgr.cdl
-- Created:	Wed Jan 25 08:44:01 1995
-- Author:	Jean-Louis Frenkel
--		<rmi@pernox>
---Copyright:	 Matra Datavision 1995

package PrsMgr
    	---Purpose: The PrsMgr package provides low level services
    	-- and is only to be used when you do not want to use
    	-- the services provided by AIS.
    	-- PrsMgr manages display through the following services:
    	-- -   supplying a graphic structure for the object to be presented
    	-- -   recalculating presentations when required, e.g. by
    	--   moving the object or changing its color
    	-- -   defining the display mode of the object to be
    	--   presented; in the case of AIS_Shape, for example,
    	--   this determines whether the object is to be displayed in:
    	--   -   wireframe 0
    	--   -   shading 1.
    	-- Note that each new Interactive Object must have all its display modes defined.
        
uses

    MMgt,TCollection,
    Graphic2d,
    TopLoc,
    Prs3d,Graphic3d,
    Quantity,Geom,
    Viewer, 
    TColStd, 
    gp
 
is

    enumeration KindOfPrs is KOP_2D,KOP_3D
    end KindOfPrs;

    enumeration TypeOfPresentation3d is TOP_AllView, TOP_ProjectorDependant
    end TypeOfPresentation3d;
    	---Purpose: To declare the type of presentation as follows
    	-- -   AllView for display involving no recalculation for
    	--   new projectors (points of view)in hidden line removal mode
    	-- -   ProjectorDependant for display in hidden line
    	--   removal mode, where every new point of view
    	--   entails recalculation of the display.

    deferred class PresentationManager;
    deferred class Presentation;
    deferred class PresentableObject;
    
    class PresentationManager2d;
    class PresentationManager3d;
    
    class Prs;
    class Presentation2d;
    class Presentation3d;

    class ModedPresentation;
    class Presentations  instantiates Sequence from TCollection
    	(ModedPresentation from PrsMgr);
    pointer Presentation3dPointer to Presentation3d from PrsMgr;
    pointer PresentableObjectPointer to PresentableObject from PrsMgr;
end PrsMgr;