mirror of
https://github.com/NGSolve/netgen.git
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348 lines
7.5 KiB
C++
348 lines
7.5 KiB
C++
#ifndef NGINTERFACE_V2
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#define NGINTERFACE_V2
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/**************************************************************************/
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/* File: nginterface_v2.hpp */
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/* Author: Joachim Schoeberl */
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/* Date: May 09 */
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/**************************************************************************/
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/*
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C++ interface to Netgen
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*/
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namespace netgen
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{
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static constexpr int POINTINDEX_BASE = 1;
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struct T_EDGE2
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{
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// int orient:1;
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// int nr:31; // 0-based
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int nr; // 0-based
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};
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struct T_FACE2
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{
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// int orient:3;
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// int nr:29; // 0-based
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int nr; // 0-based
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};
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template <typename T>
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class Ng_Buffer
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{
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size_t s;
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T * data;
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public:
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Ng_Buffer (size_t as, T * adata)
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: s(as), data(adata) { ; }
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Ng_Buffer (Ng_Buffer && buffer)
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: s(buffer.Size()), data(buffer.Release()) { ; }
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~Ng_Buffer () { delete [] data; }
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size_t Size() const { return s; }
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T * Release() { T * hd = data; data = nullptr; return hd; }
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};
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class Ng_Element
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{
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class Ng_Points
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{
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public:
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size_t num;
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const int * ptr;
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size_t Size() const { return num; }
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int operator[] (size_t i) const { return ptr[i]-POINTINDEX_BASE; }
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};
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class Ng_Vertices
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{
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public:
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size_t num;
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const int * ptr;
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size_t Size() const { return num; }
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int operator[] (size_t i) const { return ptr[i]-POINTINDEX_BASE; }
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};
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class Ng_Edges
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{
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public:
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size_t num;
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const T_EDGE2 * ptr;
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size_t Size() const { return num; }
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int operator[] (size_t i) const { return ptr[i].nr; }
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};
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class Ng_Faces
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{
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public:
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size_t num;
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const T_FACE2 * ptr;
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size_t Size() const { return num; }
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int operator[] (size_t i) const { return ptr[i].nr; }
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};
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class Ng_Facets
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{
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public:
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size_t num;
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int base;
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const int * ptr;
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size_t Size() const { return num; }
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int operator[] (size_t i) const { return ptr[i]-base; }
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};
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public:
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NG_ELEMENT_TYPE type;
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int index; // material / boundary condition
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const string * mat; // material / boundary label
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NG_ELEMENT_TYPE GetType() const { return type; }
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int GetIndex() const { return index-1; }
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Ng_Points points; // all points
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Ng_Vertices vertices;
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Ng_Edges edges;
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Ng_Faces faces;
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Ng_Facets facets;
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bool is_curved;
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};
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class Ng_Point
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{
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double * pt;
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public:
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Ng_Point (double * apt) : pt(apt) { ; }
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double operator[] (size_t i)
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{ return pt[i]; }
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operator const double * () { return pt; }
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};
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template <int DIM> class Ng_Node;
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template <>
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class Ng_Node<0>
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{
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class Ng_Elements
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{
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public:
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size_t ne;
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const int * ptr;
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size_t Size() const { return ne; }
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int operator[] (size_t i) const { return ptr[i]; }
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};
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public:
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Ng_Elements elements;
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Ng_Elements bnd_elements;
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};
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template <>
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class Ng_Node<1>
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{
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class Ng_Vertices
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{
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public:
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const int * ptr;
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size_t Size() const { return 2; }
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int operator[] (size_t i) const { return ptr[i]-POINTINDEX_BASE; }
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};
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public:
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Ng_Vertices vertices;
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};
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template <>
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class Ng_Node<2>
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{
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class Ng_Vertices
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{
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public:
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size_t nv;
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const int * ptr;
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size_t Size() const { return nv; }
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int operator[] (size_t i) const { return ptr[i]-POINTINDEX_BASE; }
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};
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class Ng_Edges
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{
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public:
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size_t ned;
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const int * ptr;
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size_t Size() const { return ned; }
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int operator[] (size_t i) const { return ptr[i]-1; }
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};
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public:
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Ng_Vertices vertices;
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Ng_Edges edges;
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int surface_el; // -1 if face not on surface
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};
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class Mesh;
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inline void DummyTaskManager2 (function<void(int,int)> func)
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{ func(0,1); }
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inline void DummyTracer2 (string, bool) { ; }
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class DLL_HEADER Ngx_Mesh
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{
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private:
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shared_ptr<Mesh> mesh;
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public:
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// Ngx_Mesh () { ; }
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// Ngx_Mesh(class Mesh * amesh) : mesh(amesh) { ; }
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Ngx_Mesh(shared_ptr<Mesh> amesh = NULL);
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void LoadMesh (const string & filename);
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void LoadMesh (istream & str);
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void SaveMesh (ostream & str) const;
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void UpdateTopology ();
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void DoArchive (ngstd::Archive & archive);
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virtual ~Ngx_Mesh();
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bool Valid () { return mesh != NULL; }
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int GetDimension() const;
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int GetNLevels() const;
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int GetNElements (int dim) const;
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int GetNNodes (int nt) const;
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Ng_Point GetPoint (int nr) const;
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template <int DIM>
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Ng_Element GetElement (size_t nr) const;
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template <int DIM>
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int GetElementIndex (size_t nr) const;
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/// material/boundary label of region, template argument is co-dimension
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template <int DIM>
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const string & GetMaterialCD (int region_nr) const;
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/// Curved Elements:
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/// elnr .. element nr
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/// xi..... DIM_EL local coordinates
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/// x ..... DIM_SPACE global coordinates
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/// dxdxi...DIM_SPACE x DIM_EL Jacobian matrix (row major storage)
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template <int DIM_EL, int DIM_SPACE>
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void ElementTransformation (int elnr,
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const double * xi,
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double * x,
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double * dxdxi) const;
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/// Curved Elements:
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/// elnr .. element nr
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/// npts .. number of points
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/// xi..... DIM_EL local coordinates
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/// sxi ... step xi
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/// x ..... DIM_SPACE global coordinates
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/// dxdxi...DIM_SPACE x DIM_EL Jacobian matrix (row major storage)
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template <int DIM_EL, int DIM_SPACE, typename T>
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void MultiElementTransformation (int elnr, int npts,
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const T * xi, size_t sxi,
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T * x, size_t sx,
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T * dxdxi, size_t sdxdxi) const;
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template <int DIM>
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const Ng_Node<DIM> GetNode (int nr) const;
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template <int DIM>
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int GetNNodes ();
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// returns domain numbers of domains next to boundary bnr -> (domin, domout)
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// 3D only
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// std::pair<int,int> GetBoundaryNeighbouringDomains (int bnr);
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void Curve (int order);
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void Refine (NG_REFINEMENT_TYPE reftype,
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void (*taskmanager)(function<void(int,int)>) = &DummyTaskManager2,
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void (*tracer)(string, bool) = &DummyTracer2);
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void GetParentNodes (int ni, int * parents) const;
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int GetParentElement (int ei) const;
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int GetParentSElement (int ei) const;
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int GetNIdentifications() const;
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int GetIdentificationType(int idnr) const;
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Ng_Buffer<int[2]> GetPeriodicVertices(int idnr) const;
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// Find element of point, returns local coordinates
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template <int DIM>
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int FindElementOfPoint
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(double * p, double * lami,
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bool build_searchtrees = false,
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int * const indices = NULL, int numind = 0) const;
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#ifdef PARALLEL
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std::tuple<int,int*> GetDistantProcs (int nodetype, int locnum) const;
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#endif
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shared_ptr<Mesh> GetMesh () const { return mesh; }
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shared_ptr<Mesh> SelectMesh () const;
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inline auto GetTimeStamp() const;
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};
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DLL_HEADER Ngx_Mesh * LoadMesh (const string & filename);
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}
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#ifdef HAVE_NETGEN_SOURCES
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#include <meshing.hpp>
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namespace netgen
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{
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#ifdef __GNUC__
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#define NGX_INLINE __attribute__ ((__always_inline__)) inline
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#else
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#define NGX_INLINE inline
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#endif
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#include <nginterface_v2_impl.hpp>
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}
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#endif
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#endif
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