/*******************************************************************************
QuadTriExtruded2D.h

The code in this file was written by Dr. Trevor S. Strickler.
email: <trevor.strickler@gmail.com>

This file is part of the QuadTri contribution to Gmsh. QuadTri allows the
conformal interface of quadrangle faces to triangle faces using pyramids and
other mesh elements.

See READMEQUADTRI.txt for more information. The license information is in
LICENSE.txt.

Trevor S. Strickler hereby transfers copyright of QuadTri files to Christophe
Geuzaine and J.-F. Remacle with the understanding that his contribution shall be
cited appropriately.

All reused or original Gmsh code is Copyright (C) 1997-2014 C. Geuzaine,
J.-F. Remacle Gmsh is available at: www.geuz.org/gmsh

For Gmsh license information, see the LICENSE.txt file for license
information. Please report all Gmsh bugs and problems to the public mailing list
<gmsh@onelab.info>.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License, Version 2, as published by the Free
Software Foundation, or (at your option) any later version, with or without the
exception given in the LICENSE.txt file supplied with this code and with Gmsh.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.
********************************************************************************/

#if !defined(_QTEXTR2D_H_)
#define _QTEXTR2D_H_

#include "Geo.h"
#include "GEntity.h"
#include "GFace.h"
#include "GEdge.h"
#include "GModel.h"
#include "ExtrudeParams.h"
#include "GmshDefines.h"
#include "MVertex.h"
#include "Context.h"
#include "GModel.h"
#include "meshGFace.h"
#include "MLine.h"
#include "MTriangle.h"
#include "MQuadrangle.h"
#include "Numeric.h"
#include <map>
#include <math.h>
#include "QuadTriUtils.h"

// The function that tests whether a 2D surface is a lateral of a valid
// QuadToTri region and whether there are conflicts. If surface is not part of
// valid QuadToTri region or if there are QuadToTri conflicts, return 0.  Note
// that RemoveDuplicateSurfaces() makes this DIFFICULT. Also, the tri_quad_flag
// determins whether the surface should be meshed with triangles or quadrangles:
// tri_quad_values: 0 = no override, 1 = mesh as quads, 2 = mesh as triangles.
// Added 2010-12-09.
int IsValidQuadToTriLateral(GFace *face, int *tri_quad_flag, bool *detectQuadToTriLateral);

// The function that tests whether a surface is a QuadToTri top surface and
// whether there are conflicts. If surface is not a top for a valid QuadToTri
// region or if there are QuadToTri conflicts, return 0.  Note that
// RemoveDuplicateSurfaces() makes this DIFFICULT. Also, the type of QuadToTri
// interface is placed into the pointer argument quadToTri. .  Added 2010-12-09.
int IsValidQuadToTriTop(GFace *face, int *quadToTri, bool *detectQuadToTriTop);


// This function meshes the top surface of a QuadToTri extrusion.  It returns 0
// if it is given a non-quadToTri extrusion or if it fails.  Args: 'GFace *to'
// is the top surface to mesh, 'from' is the source surface, 'pos' is a tree
// of vertex positions for the top surface.
int MeshQuadToTriTopSurface(GFace *from, GFace *to, MVertexRTree &pos);

#endif
