C++ MeshImpl类代码示例

// 输出网格到 VTK 文件
void MeshOpt::writeToVTK(hier::Patch<NDIM>& patch,
                         const double  time,
                         const double  dt,
                         const bool    initial_time)
{
    NULL_USE(dt);
    NULL_USE(time);
    NULL_USE(initial_time);

    const tbox::Pointer< hier::BlockPatchGeometry<NDIM> > pgeom =
            patch.getPatchGeometry();

    int block_index = pgeom->getBlockNumber();

    int patch_index = patch.getPatchNumber();

    std::stringstream bi, pi, df;
    bi << block_index;
    pi << patch_index;
    df << d_flag;

    std::string file_name = df.str() + "_block_ " + bi.str()+ "_patch_" +  pi.str()  + ".vtk";


    MsqError err;
    MeshImpl * mesh = createLocalMesh(patch);
    mesh->write_vtk(file_name.c_str(), err);

    return;
}

void SlaveBoundaryVerticesTest::make_mesh( MeshImpl& mesh,
                                           DomainClassifier& domain,
                                           const int intervals )
{
  MsqPrintError err(std::cerr);
  const char input_file[] = MESH_FILES_DIR "3D/VTK/6x6x6-hex20.vtk";
  
  const Vector3D min( -3, -3, -3 );
  const Vector3D max(  3,  3,  3 );
  const Vector3D space = (max - min) * 1.0/(intervals);
  
  mesh.clear();
  mesh.read_vtk( input_file, err );
  ASSERT_NO_ERROR(err);
  
  const Vector3D corners[8] = { Vector3D(min[0],min[1],min[2]),
                                Vector3D(max[0],min[1],min[2]),
                                Vector3D(max[0],max[1],min[2]),
                                Vector3D(min[0],max[1],min[2]),
                                Vector3D(min[0],min[1],max[2]),
                                Vector3D(max[0],min[1],max[2]),
                                Vector3D(max[0],max[1],max[2]),
                                Vector3D(min[0],max[1],max[2]) };
  
  MeshDomain* subdomains[26] = { 
                    new PlanarDomain( PlanarDomain::XZ, min[1] ),
                    new PlanarDomain( PlanarDomain::YZ, max[0] ),
                    new PlanarDomain( PlanarDomain::XZ, max[1] ),
                    new PlanarDomain( PlanarDomain::YZ, min[0] ),
                    new PlanarDomain( PlanarDomain::XY, min[2] ),
                    new PlanarDomain( PlanarDomain::XY, max[2] ),
                    new LineDomain( corners[0], corners[1] - corners[0] ),
                    new LineDomain( corners[1], corners[2] - corners[1] ),
                    new LineDomain( corners[2], corners[3] - corners[2] ),
                    new LineDomain( corners[3], corners[0] - corners[3] ),
                    new LineDomain( corners[0], corners[4] - corners[0] ),
                    new LineDomain( corners[1], corners[5] - corners[1] ),
                    new LineDomain( corners[2], corners[6] - corners[0] ),
                    new LineDomain( corners[3], corners[7] - corners[1] ),
                    new LineDomain( corners[4], corners[5] - corners[4] ),
                    new LineDomain( corners[5], corners[6] - corners[5] ),
                    new LineDomain( corners[6], corners[7] - corners[6] ),
                    new LineDomain( corners[7], corners[4] - corners[7] ),
                    new PointDomain( corners[0] ),
                    new PointDomain( corners[1] ),
                    new PointDomain( corners[2] ),
                    new PointDomain( corners[3] ),
                    new PointDomain( corners[4] ),
                    new PointDomain( corners[5] ),
                    new PointDomain( corners[6] ),
                    new PointDomain( corners[7] ) };
  const int subdims[26] = { 2, 2, 2, 2, 2, 2,
                            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
                            0, 0, 0, 0, 0, 0, 0, 0 };
  DomainClassifier::classify_skin_geometrically( domain, &mesh, 1e-6,
                                                 subdomains, subdims, 26,
                                                 err );
  domain.delete_sub_domains(true);
  ASSERT_NO_ERROR(err);
}

   // Test writing VTK unstructured mesh
 void VtkTest::test_write()
 {
   MeshImpl mesh;
   MsqPrintError err(cout);
   
     // Create file containing unstructured mesh test case
   FILE* file = fopen( temp_file_name, "w+" );
   CPPUNIT_ASSERT(file);
   int rval = fputs( mixed_unstructured_data, file );
   fclose( file );
   if (rval == EOF) remove(temp_file_name);
   CPPUNIT_ASSERT(rval != EOF);
   
     // Read unstructured mesh file
   mesh.read_vtk( temp_file_name, err );
   remove(temp_file_name);
   ASSERT_NO_ERROR(err);
   
     // Write unstructured mesh file back out
   mesh.write_vtk( temp_file_name, err );
   if (err)  remove( temp_file_name );
   ASSERT_NO_ERROR(err);
   
     // Check if file contained expected mesh
   test_read_unstructured( temp_file_name );
   remove( temp_file_name );
 }

int main( int argc, char* argv[] )
{
  parse_options( argv, argc );
  
  MeshImpl mesh;
  XYRectangle domain( max_x - min_x, max_y - min_y, min_x, min_y );
  MsqError err;
  
  create_input_mesh( input_x, mesh, err );
  if (MSQ_CHKERR(err)) { std::cerr << err << std::endl; return 2; }
  
  domain.setup( &mesh, err );
  if (MSQ_CHKERR(err)) { std::cerr << err << std::endl; return 2; }
  
  QualityMetric* metric = 0;
  if (mMetric == 'c')
    metric = new ConditionNumberQualityMetric;
  else
    metric = new IdealWeightInverseMeanRatio;
  
  LPtoPTemplate function( 1, metric );
  
  VertexMover* solver = 0;
  if (mSolver == 'j')
    solver = new ConjugateGradient( &function );
  else
    solver = new FeasibleNewton( &function );
    
  if (PatchSetUser* psu = dynamic_cast<PatchSetUser*>(solver)) 
    psu->use_global_patch();
  
  TerminationCriterion inner;
  inner.add_absolute_vertex_movement( 1e-4 );
  inner.write_mesh_steps( "synchronous", TerminationCriterion::GNUPLOT );
  solver->set_inner_termination_criterion( &inner );  
  
  InstructionQueue q;
  QualityAssessor qa( metric, 10 );
  q.add_quality_assessor( &qa, err );
  q.set_master_quality_improver( solver, err );
  q.add_quality_assessor( &qa, err );
  MeshDomainAssoc mesh_and_domain = MeshDomainAssoc(&mesh, &domain);
  q.run_instructions( &mesh_and_domain, err );
  delete solver;
  delete metric;
  
  if (MSQ_CHKERR(err)) 
    { std::cerr << err << std::endl; return 3; }
    
  mesh.write_vtk( outputFile, err );
  if (MSQ_CHKERR(err)) 
    { std::cerr << err << std::endl; return 2; }
  
  return 0;
}

void get_planar_example( const char* filename,
                         DomainClassifier& geom,
                         MeshImpl& mesh,
                         MsqError& err )
{
  static PlanarDomain z(PlanarDomain::XY);
  mesh.read_vtk(filename, err); MSQ_ERRRTN(err);
  mesh.mark_skin_fixed(err); MSQ_ERRRTN(err);
  DomainClassifier::DomainSet set(&z);
  mesh.get_all_vertices( set.vertices, err ); MSQ_ERRRTN(err);
  mesh.get_all_elements( set.elements, err ); MSQ_ERRRTN(err);
  DomainClassifier::classify_by_handle( geom, &mesh, &set, 1, err ); MSQ_ERRRTN(err);
}

int run_example( const Example& e, bool write_output_file )
{
  MsqPrintError err(std::cerr);
  MeshImpl mesh;
  DomainClassifier domain;
  HexLagrangeShape hex27;
  
  std::cout << std::endl 
            << "--------------------------------------------------------------------"
            << std::endl
            << e.desc << std::endl
            << "--------------------------------------------------------------------"
            << std::endl;
   
  std::string name = e.func( domain, mesh, err );
  if (MSQ_CHKERR(err)) return 2;
  std::cout << "Loaded mesh from: " << name << std::endl;
  
  UntangleWrapper untangler;
  untangler.set_slaved_ho_node_mode( Settings::SLAVE_NONE );
  untangler.set_mapping_function( &hex27 );
  MeshDomainAssoc mesh_and_domain = MeshDomainAssoc(&mesh, &domain, false, true);
  untangler.run_instructions( &mesh_and_domain, err ); 
  if (MSQ_CHKERR(err)) return 1;
  ShapeImprover smoother;
  smoother.set_slaved_ho_node_mode( Settings::SLAVE_NONE );
  smoother.set_mapping_function( &hex27 );
  smoother.set_vertex_movement_limit_factor( 0.05 );
  smoother.run_instructions( &mesh_and_domain, err );
  if (MSQ_CHKERR(err)) return 1;
  
  if (write_output_file) {
    size_t idx = name.find( ".vtk" );
    if (idx != std::string::npos) {
      std::string newname( name.substr(0, idx) );
      newname += ".out";
      newname += name.substr(idx);
      name.swap(newname);
    }
    else {
      name += ".out";
    }
    
    mesh.write_vtk( name.c_str(), err ); MSQ_CHKERR(err);
    std::cout << "Write mesh to file: " << name << std::endl;
  }
  
  return smoother.quality_assessor().invalid_elements();
}

   // Test reading 3D Vtk rectilinear-grid mesh
 void VtkTest::test_read_rectilinear_grid()
 {
   MeshImpl mesh;
   MsqPrintError err(cout);
   
   FILE* file = fopen( temp_file_name, "w+" );
   fputs( rectilinear_grid_data, file );
   fclose( file );
   
   mesh.read_vtk( temp_file_name, err );
   remove( temp_file_name );
   ASSERT_NO_ERROR(err);
   
   check_8hex_structured( mesh );
 }

   // Test reading 2D Vtk structured-points mesh
 void VtkTest::test_read_structured_2d_points()
 {
   MeshImpl mesh;
   MsqPrintError err(cout);
  
   FILE* file = fopen( temp_file_name, "w+" );
   fputs( structured_2d_points_data, file );
   fclose( file );
   
   mesh.read_vtk( temp_file_name, err );
   remove( temp_file_name );
   ASSERT_NO_ERROR(err);
   
   check_4quad_structured( mesh );
 }

void TagVertexMeshTest::setUp()
{
  const char vtk_data[] = 
    "# vtk DataFile Version 2.0\n"
    "test mesh\n"
    "ASCII\n"
    "DATASET UNSTRUCTURED_GRID\n"
    "POINTS 3 float\n"
    "0 0 0\n"
    "1 0 0\n"
    "0 1 0\n"
    "CELLS 1 4\n"
    "3 0 1 2\n"
    "CELL_TYPES 1\n"
    "5\n";
  
  FILE* file = fopen( TEMP_FILE_NAME, "w" );
  CPPUNIT_ASSERT( !!file );
  size_t r = fwrite( vtk_data, sizeof(vtk_data)-1, 1, file );
  fclose( file );
  CPPUNIT_ASSERT( r == 1 );
  
  MsqPrintError err( std::cerr );
  realMesh = new MeshImpl;
  realMesh->read_vtk( TEMP_FILE_NAME, err );
  remove( TEMP_FILE_NAME );
  ASSERT_NO_ERROR(err);
}

    // Test reading MeshImpl boundary-vertex bit
    // from Vtk scalar attribute.
  void VtkTest::test_read_fixed_attrib()
  {
    MeshImpl mesh;
    MsqPrintError err(cout);
    
    FILE* file = fopen( temp_file_name, "w+" );
    fputs( structured_3d_points_data, file );
    fputs( fixed_vertex_attrib, file );
    fclose( file );
    
    mesh.read_vtk( temp_file_name, err );
    remove( temp_file_name );
    ASSERT_NO_ERROR(err);

    std::vector<Mesh::ElementHandle> elems;
    mesh.get_all_elements( elems, err );
    CPPUNIT_ASSERT( !err );
    CPPUNIT_ASSERT_EQUAL( elems.size(), (size_t)8 );
    
    std::vector<Mesh::VertexHandle> verts;
    std::vector<size_t> offsets;
    mesh.elements_get_attached_vertices( arrptr(elems), elems.size(), verts, offsets, err );
    ASSERT_NO_ERROR(err);
    
    // get unique list of vertices
    std::vector<Mesh::VertexHandle>::iterator new_end;
    std::sort( verts.begin(), verts.end() );
    new_end = std::unique( verts.begin(), verts.end() );
    verts.resize( new_end - verts.begin() );
    CPPUNIT_ASSERT_EQUAL( verts.size(), (size_t)27 );

    // get fixed flag
    std::vector<bool> fixed;
    mesh.vertices_get_fixed_flag( arrptr(verts), fixed, verts.size(), err );
    ASSERT_NO_ERROR(err);
    CPPUNIT_ASSERT_EQUAL( verts.size(), fixed.size() );
    
    for (int i = 0; i < 27; ++i)
    {
      bool should_be_fixed = (i != 13);
      CPPUNIT_ASSERT_EQUAL( should_be_fixed, (bool)fixed[i] );
    }
  }

std::string get_sphere_cylinder_example( DomainClassifier& geom, MeshImpl& mesh, MsqError& err )
{
  const char filename[] = SRCDIR "sphereCylinder_1194_inv.vtk";

  const Vector3D vec_k(0,0,8), vec_nk(0,0,-8);
  const Vector3D vec_c(0,0,5);

  //++ 0D domains ++

  //++ 1D domains ++

  //top circle
  static CircleDomain cr_to(vec_k,vec_k,8.0), cr_ti(vec_k,vec_k,4.0);
  //bottom circle
  static CircleDomain cr_bo(vec_nk,vec_nk,8.0);

  //++ 2D domains ++

  static PlanarDomain sf_t(vec_k,vec_k), sf_b(vec_nk,vec_nk);
  static CylinderDomain cy(8.0,vec_k,vec_k);
  static SphericalDomain sp(vec_c,5.0);

  MeshDomain* base_domains[] = {
    &cr_to, &cr_ti, &cr_bo,
    &sf_t, &sf_b, &cy, &sp
  };
  const int NDOM = sizeof(base_domains)/sizeof(base_domains[0]);

  int dim_array[NDOM] = {
    1, 1, 1, 
    2, 2, 2, 2
  };

  //++ MESH & DOMAIN ++

  mesh.read_vtk(filename, err); MSQ_ERRZERO(err);
  DomainClassifier::classify_skin_geometrically (geom, &mesh, 0.001, base_domains, dim_array, NDOM, err);
  MSQ_ERRZERO(err);
  mesh.set_skin_flags( false, false, true, err ); MSQ_ERRZERO(err);
  
  return filename;
}

void cond_write_file( MeshImpl& mesh, const char* filename ) 
{
  if (filename) {
    MsqPrintError err(std::cerr);
    mesh.write_vtk( filename, err );
    if (MSQ_CHKERR(err)) {
      std::cerr << filename << ": failed to write file" << std::endl;
      exit(1);
    }
    std::cout << "Wrote file: " << filename << std::endl;
  }
}

    // Test reading Vtk simple (one-component) scalar attribute
  void VtkTest::test_read_simple_scalar_attrib()
  {
    MeshImpl mesh;
    MsqPrintError err(cout);
   
    FILE* file = fopen( temp_file_name, "w+" );
    fputs( structured_3d_points_data, file );
    fputs( simple_scalar_attrib, file );
    fclose( file );
    
    mesh.read_vtk( temp_file_name, err );
    remove( temp_file_name );
    ASSERT_NO_ERROR(err);
    
    std::vector<Mesh::ElementHandle> elems;
    mesh.get_all_elements( elems, err );
    CPPUNIT_ASSERT( !err );
    CPPUNIT_ASSERT_EQUAL( elems.size(), (size_t)8 );
   
    void* th = mesh.tag_get( "global_id", err );
    CPPUNIT_ASSERT( !err );

    std::string name;
    Mesh::TagType type;
    unsigned tagsize;
    mesh.tag_properties( th, name, type, tagsize, err );
    CPPUNIT_ASSERT( !err && type == Mesh::INT && tagsize == 1 );
    
    int elem_data[8];
    mesh.tag_get_element_data( th, 8, arrptr(elems), elem_data, err );
    CPPUNIT_ASSERT( !err );
    
    for (int i = 0; i < 8; ++i)
      CPPUNIT_ASSERT( elem_data[i] == (1+i) );
  }

    // Test reading Vtk vector attribute
  void VtkTest::test_read_vector_attrib()
  {
    MeshImpl mesh;
    MsqPrintError err(cout);
    
    FILE* file = fopen( temp_file_name, "w+" );
    fputs( structured_3d_points_data, file );
    fputs( simple_vector_attrib, file );
    fclose( file );
    
    mesh.read_vtk( temp_file_name, err );
    remove( temp_file_name );
    ASSERT_NO_ERROR(err);
    
    std::vector<Mesh::ElementHandle> elems;
    mesh.get_all_elements( elems, err );
    CPPUNIT_ASSERT( !err );
    CPPUNIT_ASSERT_EQUAL( elems.size(), (size_t)8 );
   
    void* th = mesh.tag_get( "hexvect", err );
    CPPUNIT_ASSERT( !err );

    std::string name;
    Mesh::TagType type;
    unsigned tagsize;
    mesh.tag_properties( th, name, type, tagsize, err );
    CPPUNIT_ASSERT( !err && type == Mesh::DOUBLE && tagsize == 3 );
    
    double elem_data[24];
    mesh.tag_get_element_data( th, 8, arrptr(elems), elem_data, err );
    CPPUNIT_ASSERT( !err );
    
    for (int i = 0; i < 8; ++i)
      CPPUNIT_ASSERT( Vector3D( elem_data+3*i ) == Vector3D( i+1, i+1, i+1 ) );
  }

void TagVertexMeshTest::test_cleanup()
{
  MsqPrintError err( std::cerr );
  Vector3D new_coords(5, 5, 5);
  MsqVertex get_coords;
  
  std::vector<Mesh::VertexHandle> vertices;
  realMesh->get_all_vertices( vertices, err );
  ASSERT_NO_ERROR(err);
  Mesh::VertexHandle vertex = vertices[0];

  realMesh->vertices_get_coordinates( &vertex, &get_coords, 1, err );
  ASSERT_NO_ERROR(err);
  Vector3D orig_coords = get_coords;

    // modify a vertex in the tag interface
  {
    TagVertexMesh tag_mesh( err, realMesh, true );
    ASSERT_NO_ERROR(err);
    tag_mesh.vertex_set_coordinates( vertex, new_coords, err );
    ASSERT_NO_ERROR(err);
  }

    // check that values were cleaned up when previous instance was destroyed
  {
    TagVertexMesh tag_mesh( err, realMesh, false );
    ASSERT_NO_ERROR(err);
    tag_mesh.vertices_get_coordinates( &vertex, &get_coords, 1, err );
    ASSERT_NO_ERROR(err);
    CPPUNIT_ASSERT_VECTORS_EQUAL( orig_coords, get_coords, DBL_EPSILON );
  }
}