-- File:	HLRAlgo.cdl
-- Created:	Tue Feb 18 17:18:30 1992
-- Author:	Christophe MARION
--		<cma@sdsun1>
---Copyright:	 Matra Datavision 1992

package HLRAlgo 
--- Purpose:        In order to have the precision required in
-- industrial design, drawings need to offer the
-- possibility of removing lines, which are hidden
-- in a given projection. To do this, the Hidden
-- Line Removal component provides two
 --   algorithms: HLRBRep_Algo and HLRBRep_PolyAlgo.
-- These algorithms remove or indicate lines
-- hidden by surfaces. For a given projection, they
-- calculate a set of lines characteristic of the
-- object being represented. They are also used
-- in conjunction with extraction utilities, which
-- reconstruct a new, simplified shape from a
-- selection of calculation results. This new shape
-- is made up of edges, which represent the lines
-- of the visualized shape in a plane. This plane is the projection plane.
-- HLRBRep_Algo takes into account the shape
-- itself. HLRBRep_PolyAlgo works with a
-- polyhedral simplification of the shape. When
-- you use HLRBRep_Algo, you obtain an exact
-- result, whereas, when you use
-- HLRBRep_PolyAlgo, you reduce computation
-- time but obtain polygonal segments.
uses
    Standard,
    StdFail,
    MMgt,
    TCollection,
    TColStd,
    TColgp,
    Intrv,
    gp,
    GeomAbs,
    TopAbs,
    TopBas,
    TopCnx,
    TopLoc,
    IntRes2d,
    IntCurveSurface

is
    class BiPoint;
    
    class ListOfBPoint             instantiates List         from TCollection
    	(BiPoint from HLRAlgo);

    class PolyShellData;
	---Purpose: All the PolyData of a Shell
    
    class PolyInternalData;
	---Purpose: to Update OutLines.
    
    class PolyInternalSegment;
	---Purpose: to Update OutLines.
    
    class PolyInternalNode;
	---Purpose: to Update OutLines.
    
    class PolyData;
	---Purpose: Data structure of a set of Triangles.
    
    class PolyHidingData;
	---Purpose: Data structure of a set of Hiding Triangles.
    
    class TriangleData;
	---Purpose: Data structure of a triangle.
    
    class Array1OfPHDat            instantiates Array1       from TCollection
    	(PolyHidingData from HLRAlgo);
	
    class HArray1OfPHDat           instantiates HArray1      from TCollection
    	(PolyHidingData from HLRAlgo,
         Array1OfPHDat  from HLRAlgo);
	
    class Array1OfPISeg            instantiates Array1       from TCollection
    	(PolyInternalSegment from HLRAlgo);
	
    class HArray1OfPISeg           instantiates HArray1      from TCollection
    	(PolyInternalSegment from HLRAlgo,
         Array1OfPISeg       from HLRAlgo);
	
    class Array1OfPINod            instantiates Array1       from TCollection
    	(PolyInternalNode from HLRAlgo);
	
    class HArray1OfPINod           instantiates HArray1      from TCollection
    	(PolyInternalNode from HLRAlgo,
         Array1OfPINod    from HLRAlgo);
	
    class Array1OfTData            instantiates Array1       from TCollection
    	(TriangleData from HLRAlgo);
	
    class HArray1OfTData           instantiates HArray1      from TCollection
    	(TriangleData  from HLRAlgo,
         Array1OfTData from HLRAlgo);
	
    class PolyAlgo;
	---Purpose: to remove Hidden lines on Triangulations.
    
    class EdgeStatus;
	---Purpose: This class describes the  visible-hidden Status of
	--          an Edge and its parametric bounds.
	
    class Projector;
    	---Purpose: To transform and project Points and Planes.
	
    class Intersection;
	---Purpose: Parameter and State (above, on or under the face).

    class Coincidence;
	---Purpose: A coincidence  describes the geometry  of the edge
	--          of the hiding face around the intersection.
	
    class Interference             instantiates Interference from TopBas
    	(Intersection from HLRAlgo, 
	 Coincidence  from HLRAlgo);

    class InterferenceList         instantiates List         from TCollection
    	(Interference from HLRAlgo);
	
    class EdgesBlock;
	---Purpose: A set of oriented Edges. (A wire).
    
    class WiresBlock;
	---Purpose: A set of Wires. (A face).
    
    class EdgeIterator;
	---Purpose: Iterator  on the  visible or  hidden  parts of  an
	--          EdgeStatus.
    
    UpdateMinMax (x,y,z : Real    from Standard;
                  Min   : Address from Standard;
                  Max   : Address from Standard);

    EnlargeMinMax (tol : Real    from Standard;
                   Min : Address from Standard;
                   Max : Address from Standard);

    InitMinMax (Big : Real    from Standard;
                Min : Address from Standard;
                Max : Address from Standard);

    EncodeMinMax (Min    : Address from Standard;
                  Max    : Address from Standard;
                  MinMax : Address from Standard);

    SizeBox (Min    : Address from Standard;
             Max    : Address from Standard)
    returns Real from Standard;

    DecodeMinMax (MinMax : Address from Standard;
                  Min    : Address from Standard;
                  Max    : Address from Standard);

    CopyMinMax (IMin : Address from Standard;
                IMax : Address from Standard;
                OMin : Address from Standard;
                OMax : Address from Standard);

    AddMinMax (IMin : Address from Standard;
               IMax : Address from Standard;
               OMin : Address from Standard;
               OMax : Address from Standard);

end HLRAlgo;