-- Created on: 1995-09-21
-- Created by: Remi LEQUETTE
-- Copyright (c) 1995-1999 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 HideData from DBRep 

	---Purpose: This  class stores all the informations concerning
	--          hidden lines on a view.
	--          
	--          * View number
	--          * Matrix of projection
	--          * Type of projection, focal
	--          * Arrays of 3d points
	--          
	--          A drawable shape contains a  list of such  objects
	--          to store  the  hidden lines  for  each view.   The
	--          IsSame method is  used  to check if   hidden lines
	--          must be recompiled.

uses

    Trsf         from gp,
    Display      from Draw,
    Color        from Draw,
    Shape        from TopoDS,
    ListOfBPoint from HLRBRep

is

    Create returns HideData from DBRep;

    Set (me     : in out;
    	 ViewId : Integer from Standard;
         TProj  : Trsf    from gp;
    	 Focal  : Real    from Standard;
         S      : Shape   from TopoDS;
         ang    : Real    from Standard);
	---Purpose: ViewId is the view number
	--          TProj the projection
	--          Focal <= 0 means parallel projection
	--          Alg : the hidden lines
    
    ViewId(me) returns Integer from Standard;
	---C++: inline
	
    Angle(me) returns Real from Standard;
	---C++: inline
	
    IsSame(me; TProj : Trsf from gp; Focla : Real) returns Boolean;
	---Purpose: Returns True if the projection is the same
	
    DrawOn(me                      :in out;
           D                       : in out Display from Draw;
    	   withRg1,withRgN,withHid :        Boolean from Standard;
    	   VisCol, HidCol          :        Color   from Draw);

    LastPick(me) returns Shape from TopoDS;
	---Purpose: Returns the subshape touched by the last pick.
	---C++: return const &

fields
    myView     : Integer      from Standard;
    myTrsf     : Trsf         from gp;
    myFocal    : Real         from Standard;
    myBiPntVis : ListOfBPoint from HLRBRep;
    myBiPntHid : ListOfBPoint from HLRBRep;
    myPickShap : Shape        from TopoDS;
    myAngle    : Real         from Standard;

end HideData;