GFace.h

// Gmsh - Copyright (C) 1997-2015 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// bugs and problems to the public mailing list <gmsh@geuz.org>.

#ifndef _GFACE_H_
#define _GFACE_H_

#include <list>
#include <string>
#include <vector>
#include <map>
#include "GEntity.h"
#include "GPoint.h"
#include "GEdgeLoop.h"
#include "SPoint2.h"
#include "SVector3.h"
#include "Pair.h"
#include "Numeric.h"
#include "boundaryLayersData.h"

class MElement;
class MTriangle;
class MQuadrangle;
class MPolygon;
class ExtrudeParams;
class GFaceCompound;

struct surface_params
{
  double radius, radius2, height, cx, cy, cz;
};

class GRegion;

// A model face.
class GFace : public GEntity
{
 protected:
  // edge loops might replace what follows (list of all the edges of
  // the face + directions)
  std::list<GEdge *> l_edges;
  std::list<int> l_dirs;
  GRegion *r1, *r2;
  mean_plane meanPlane;
  std::list<GEdge *> embedded_edges;
  std::list<GVertex *> embedded_vertices;
  GFaceCompound *compound; // this model edge belongs to a compound

  // replace edges (for gluing) for specific modelers, we have to
  // re-create internal data
  virtual void replaceEdgesInternal(std::list<GEdge*> &){}
  BoundaryLayerColumns _columns;

 public: // this will become protected or private
  std::list<GEdgeLoop> edgeLoops;

  // periodic counterparts of edges
  std::map<int,int> edgeCounterparts;

  // encoding of an explicit affine transformation for period meshing
  std::vector<double> affineTransform;

  // an array with additional vertices that are supposed to exist in
  // the final mesh of the model face. This can be used for boundary
  // layer meshes or when using Lloyd-like smoothing algorithms those
  // vertices are classifed on this GFace, their type is MFaceVertex.
  // After mesh generation, those are moved to the mesh_vertices array
  std::vector<MVertex*> additionalVertices;