-- Created on: 1996-03-05
-- Created by: Joelle CHAUVET
-- Copyright (c) 1996-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and/or modify it under
-- the terms of the GNU Lesser General Public License version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.

-- Modified:	Wed Jan 15 09:45:42 1997
--    by:	Joelle CHAUVET
--		G1135 : Approximation with criterion
--                      class Criterion and enumeration CriterionType
--		G1134 : Approximation with regular cuttings
--                      enumeration CriterionRepartition



package AdvApp2Var 

     ---Purpose: This  package provides algorithms  to  approximate  a
     --          function of 2 variables that can be multidimensional;
     --          the result is a BSpline function with the required continuity
     --  Warning: only one 3D BSpline for the moment          
     --          



uses 
     gp,
     Geom,
     GeomAbs,
     TColStd, 
     TColgp,
     TColGeom,
     AdvApprox,
     Standard
 
is

    enumeration CriterionType is
	---Purpose: influency of the criterion on cutting process
       	Absolute,
	    ---Purpose: cutting when criterion is not satisfied
	    --          desactivation of the compute of the error max
    	Relative
	    ---Purpose: cutting when error max is not good or if error
	    --          max is good and criterion is not satisfied
	
    end CriterionType;
    

    enumeration CriterionRepartition is
	---Purpose: way of cutting process
       	Regular,
	    ---Purpose: all new cutting points at each step of cutting
	    --          process : (a+i(b-a)/N)i at step N,
	    --                    (a+i(b-a)/(N+1))i at step N+1,...
	    --                    where (a,b) is the global interval 
    	Incremental
	    ---Purpose: add one new cutting point at each step
	    --          of cutting process
	
    end CriterionRepartition;
    --
    --     
    --  public classes
    --  
    --  

    class ApproxAFunc2Var from AdvApp2Var ;

    imported EvaluatorFunc2Var ;

    deferred class Criterion from AdvApp2Var ;



    -- 
    -- 
    -- private classes for Data
    -- 
    -- 
    -- Basic Data

    class Context from AdvApp2Var;

    class Node from AdvApp2Var;

    class Iso from AdvApp2Var;

    class Patch from AdvApp2Var;

    imported Strip; 
    ---Purpose :
    -- set of constraints along a same type of Iso on the same level

    -- 
    --  
    --  Structured Data

    imported SequenceOfNode; 
    imported SequenceOfPatch; 
    imported SequenceOfStrip;

    --
    --
    --  Final Data

    class Network from AdvApp2Var;
    --  contains all the result patches and the associated parameters U and V
    --  

    class Framework from AdvApp2Var;
    --  contains all the constraints (Nodes and Isos)
    --  

    
end AdvApp2Var;