1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*===========================================================================
Copyright (C) 2010-2020 Roman Putanowicz.
This file is a part of GetFEM
GetFEM is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version along with the GCC Runtime Library
Exception either version 3.1 or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License and GCC Runtime Library Exception for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
===========================================================================*/
/**@file cyl_slicer.cc
@brief Demonstrate function interpolation and cylinder slicing of 2D mesh.
This program tests if slicer_cylinder class is working. In particular
it check if it is possible to slice 2D mesh with 3D cylinder.
The result of running this program are two VTK files:
feminterpolation.vtk -- contains a mesh over rectangular domain
and function f(x,y,z) = x
circleslice.vtk -- contains elliptic slice of the above mesh
*/
#include <getfem/getfem_mesh_slicers.h>
#include <getfem/getfem_mesh.h>
#include <getfem/bgeot_mesh_structure.h>
#include <getfem/getfem_export.h>
#include <getfem/getfem_regular_meshes.h>
#include <getfem/bgeot_config.h>
using std::endl; using std::cout; using std::cerr;
using std::ends; using std::cin;
bgeot::scalar_type func(const bgeot::base_node& x) {
return x[0];
}
#ifdef GMM_USES_MPI
int main(int argc, char *argv[]) {
GETFEM_MPI_INIT(argc, argv);
#else
int main(int, char **) {
#endif
try {
getfem::mesh mymesh;
std::vector<getfem::size_type> nsubdiv(2);
nsubdiv[0] = 8; // number of mesh elements in X direction
nsubdiv[1] = 4; // number of mesh elements in Y direction
// set pointer to geometric transformation
bgeot::pgeometric_trans pgt =
bgeot::geometric_trans_descriptor("GT_QK(2,1)");
getfem::regular_unit_mesh(mymesh, nsubdiv, pgt);
getfem::base_matrix M;
int dim = pgt->dim();
M.resize(dim, dim);
gmm::clear(M);
M(0,0) = 2;
M(1,1) = 1;
mymesh.transformation(M);
getfem::mesh_fem mf(mymesh, 1);
mf.set_finite_element(getfem::QK_fem(2,1));
std::vector<bgeot::scalar_type> U(mf.nb_dof());
getfem::interpolation_function(mf, U, func);
getfem::vtk_export exp("feminterpolation.vtk");
exp.exporting(mymesh);
exp.write_point_data(mf, U, "temperature");
getfem::stored_mesh_slice sl;
getfem::base_node x0(0.5, 0.5, -1.0);
getfem::base_node x1(1.5, 0.5, 1.0);
sl.build(mymesh, getfem::slicer_cylinder(x0, x1, 0.3, -1), 4);
getfem::vtk_export expsl("circleslice.vtk");
expsl.exporting(sl);
expsl.write_point_data(mf, U, "temperature");
} GMM_STANDARD_CATCH_ERROR;
GETFEM_MPI_FINALIZE;
return 0;
}
|
