-- Created on: 1995-06-12
-- Created by: Joelle CHAUVET
-- 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.

-- Modified:	Tue Oct 15 10:12:02 1996
--              Add ChFi2d_TangencyError (PRO3529)
-- Modified:	Tue Oct 22 09:23:11 1996
--		Add ChFi2d_FirstEdgeDegenerated, ChFi2d_LastEdgeDegenerated,
--		ChFi2d_BothEdgesDegenerated (PRO4896)
-- Modified:	Fri Sep 25 09:38:04 1998
--              ChFi2d_NotAuthorized is used if the edges are not
--              lines or circles (BUC60288)

package ChFi2d 

	---Purpose: This package contains the algorithms used to build
	--          fillets or chamfers on planar wire.

uses
    TopoDS,
    TopTools,
    gp

is
    
    enumeration ConstructionError is
	---Purpose: error     that    can   occur       during   the
	--          fillet  construction on planar wire
	NotPlanar,
	    ---Purpose: the face is not planar
	NoFace,
	    ---Purpose: the face is null
    	InitialisationError,
	    ---Purpose: the two  faces used for the initialisation are
	    --          uncompatible.
	ParametersError,
	    ---Purpose: the  parameters  as  distances   or  angle for
	    --          chamfer are less or equal to zero.
    	Ready,
	    ---Purpose: the initialization has been succesfull.
	IsDone,
	ComputationError,
	    ---Purpose: the algorithm could not find a solution.
	ConnexionError,
	    ---Purpose: the vertex given  to locate the fillet  or the
	    --          chamfer  is not connected to 2 edges.
	TangencyError,
	    ---Purpose: the two edges connected to the vertex are tangent.

 
	FirstEdgeDegenerated,
	    ---Purpose: the first edge is degenerated.
	LastEdgeDegenerated,
	    ---Purpose: the last edge is degenerated.
	BothEdgesDegenerated,
	    ---Purpose: the two edges are degenerated.
    	NotAuthorized
	    ---Purpose: One or the two  edges connected to the  vertex
	    --          is a fillet or a chamfer
	    --          One or the two  edges connected to the  vertex
	    --          is not a line or a circle
	
    end ConstructionError;


    class Builder;


    CommonVertex( E1, E2 :     Edge   from TopoDS; 
    	    	  V      : out Vertex from TopoDS)
    returns Boolean
    is private;
    	---Warning: <V> has sense only if the value <True> is returned    


    FindConnectedEdges( F      :     Face   from TopoDS;
    	    	        V      :     Vertex from TopoDS;
    	    	        E1, E2 : out Edge   from TopoDS)
    returns ConstructionError from ChFi2d
    is private;

    	---Warning: <E1> and <E2> has sense only if the returned value
    	--          is <IsDone>


end ChFi2d;