// Gmsh - Copyright (C) 1997-2019 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/gmsh/gmsh/issues.

#ifndef _BACKGROUND_MESH_TOOLS_H_
#define _BACKGROUND_MESH_TOOLS_H_

#include "STensor3.h"

class GFace;
class GVertex;
class GEdge;
class GEntity;

SMetric3 buildMetricTangentToCurve(SVector3 &t, double l_t, double l_n);
SMetric3 buildMetricTangentToSurface(SVector3 &t1, SVector3 &t2, double l_t1,
                                     double l_t2, double l_n);
double BGM_MeshSize(GEntity *ge, double U, double V, double X, double Y,
                    double Z);
SMetric3 BGM_MeshMetric(GEntity *ge, double U, double V, double X, double Y,
                        double Z);
bool Extend1dMeshIn2dSurfaces();
bool Extend2dMeshIn3dVolumes();
SMetric3 max_edge_curvature_metric(const GVertex *gv);
SMetric3 max_edge_curvature_metric(const GEdge *ge, double u, double &l);
SMetric3 metric_based_on_surface_curvature(const GFace *gf, double u, double v,
                                           bool surface_isotropic = false,
                                           double d_normal = 1.e12,
                                           double d_tangent_max = 1.e12);

#endif
