netgen/libsrc/include/nginterface_v2.hpp
2015-04-27 11:18:22 +02:00

263 lines
5.2 KiB
C++

#ifndef NGINTERFACE_V2
#define NGINTERFACE_V2
/**************************************************************************/
/* File: nginterface_v2.hpp */
/* Author: Joachim Schoeberl */
/* Date: May 09 */
/**************************************************************************/
/*
C++ interface to Netgen
*/
namespace netgen
{
struct T_EDGE2
{
int orient:1;
int nr:31; // 0-based
};
struct T_FACE2
{
int orient:3;
int nr:29; // 0-based
};
class Ng_Element
{
class Ng_Points
{
public:
int num;
const int * ptr;
int Size() const { return num; }
int operator[] (int i) const { return ptr[i]-1; }
};
class Ng_Vertices
{
public:
int num;
const int * ptr;
int Size() const { return num; }
int operator[] (int i) const { return ptr[i]-1; }
};
class Ng_Edges
{
public:
int num;
const T_EDGE2 * ptr;
int Size() const { return num; }
// int operator[] (int i) const { return abs (ptr[i])-1; }
int operator[] (int i) const { return ptr[i].nr; }
};
class Ng_Faces
{
public:
int num;
const T_FACE2 * ptr;
int Size() const { return num; }
// int operator[] (int i) const { return (ptr[i]-1) / 8; }
int operator[] (int i) const { return ptr[i].nr; }
};
public:
NG_ELEMENT_TYPE type;
int index; // material / boundary condition
NG_ELEMENT_TYPE GetType() const { return type; }
int GetIndex() const { return index-1; }
Ng_Points points; // all points
Ng_Vertices vertices;
Ng_Edges edges;
Ng_Faces faces;
bool is_curved;
};
class Ng_Point
{
double * pt;
public:
Ng_Point (double * apt) : pt(apt) { ; }
double operator[] (int i)
{ return pt[i]; }
operator const double * () { return pt; }
};
template <int DIM> class Ng_Node;
template <>
class Ng_Node<1>
{
class Ng_Vertices
{
public:
const int * ptr;
int Size() const { return 2; }
int operator[] (int i) const { return ptr[i]-1; }
};
public:
Ng_Vertices vertices;
};
template <>
class Ng_Node<2>
{
class Ng_Vertices
{
public:
int nv;
const int * ptr;
int Size() const { return nv; }
int operator[] (int i) const { return ptr[i]-1; }
};
class Ng_Edges
{
public:
int ned;
const int * ptr;
int Size() const { return ned; }
int operator[] (int i) const { return ptr[i]-1; }
};
public:
Ng_Vertices vertices;
Ng_Edges edges;
};
class Mesh;
class DLL_HEADER Ngx_Mesh
{
private:
shared_ptr<Mesh> mesh;
public:
// Ngx_Mesh () { ; }
// Ngx_Mesh(class Mesh * amesh) : mesh(amesh) { ; }
Ngx_Mesh(shared_ptr<Mesh> amesh = NULL);
void LoadMesh (const string & filename);
void LoadMesh (istream & str);
void SaveMesh (ostream & str) const;
void UpdateTopology ();
void DoArchive (ngstd::Archive & archive);
virtual ~Ngx_Mesh();
bool Valid () { return mesh != NULL; }
int GetDimension() const;
int GetNLevels() const;
int GetNElements (int dim) const;
int GetNNodes (int nt) const;
Ng_Point GetPoint (int nr) const;
template <int DIM>
Ng_Element GetElement (int nr) const;
template <int DIM>
int GetElementIndex (int nr) const;
/// Curved Elements:
/// elnr .. element nr
/// xi..... DIM_EL local coordinates
/// x ..... DIM_SPACE global coordinates
/// dxdxi...DIM_SPACE x DIM_EL Jacobian matrix (row major storage)
template <int DIM_EL, int DIM_SPACE>
void ElementTransformation (int elnr,
const double * xi,
double * x,
double * dxdxi) const;
/// Curved Elements:
/// elnr .. element nr
/// npts .. number of points
/// xi..... DIM_EL local coordinates
/// sxi ... step xi
/// x ..... DIM_SPACE global coordinates
/// dxdxi...DIM_SPACE x DIM_EL Jacobian matrix (row major storage)
template <int DIM_EL, int DIM_SPACE>
void MultiElementTransformation (int elnr, int npts,
const double * xi, size_t sxi,
double * x, size_t sx,
double * dxdxi, size_t sdxdxi) const;
template <int DIM>
Ng_Node<DIM> GetNode (int nr) const;
template <int DIM>
int GetNNodes ();
// Find element of point, returns local coordinates
template <int DIM>
int FindElementOfPoint
(double * p, double * lami,
bool build_searchtrees = false,
int * const indices = NULL, int numind = 0) const;
#ifdef PARALLEL
std::tuple<int,int*> GetDistantProcs (int nodetype, int locnum) const;
#endif
shared_ptr<Mesh> SelectMesh () const;
};
DLL_HEADER Ngx_Mesh * LoadMesh (const string & filename);
}
#ifdef HAVE_NETGEN_SOURCES
#include <meshing.hpp>
namespace netgen
{
#define NGX_INLINE inline
#include <nginterface_v2_impl.hpp>
}
#endif
#endif