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Olena  User documentation 2.1
An Image Processing Platform
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attachment.cc
1 // Copyright (C) 2011 EPITA Research and Development Laboratory (LRDE)
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24 // executable file might be covered by the GNU General Public License.
25 
28 
29 #include <mln/make/attachment.hh>
30 
31 #include "tests/core/image/complex_image.hh"
32 
33 
34 int
35 main()
36 {
37  typedef mln::bin_2complex_image2d I;
38  typedef mln_psite_(I) P;
39 
40  // Neighborhood (n-face to (n+1)-faces relationship) required by
41  // mln::is_facet.
42  mln::complex_lower_higher_neighborhood<I::dim, mln_geom_(I)> adj_nbh;
43 
44  /* A 2-d (simplicial) complex and its adjacency graph.
45 
46  c 0 1 2 3
47  r .------------------------
48  | v0 e3 v3
49  0 | o-----------o v0----e3----v3
50  | / \ ,-----. / / \ | /
51  | / . \ \ t1/ / / \ t1 /
52  1 | e0 / / \ e1\ / / e4 e0. ,e1' `e4
53  | / /t0 \ \ ' / / t0 \ /
54  | / `-----' \ / / | \ /
55  2 | o-----------o v1----e2----v2
56  | v1 e2 v2
57 
58  v = vertex
59  e = edge
60  t = triangle
61  */
62  I ima = make_test_bin_2complex_image2d();
63 
64  // A few faces.
65  P v0(ima.domain(), 0, 0);
66  P v2(ima.domain(), 0, 2);
67  P e1(ima.domain(), 1, 1);
68  P t0(ima.domain(), 2, 0);
69 
70  // The attachment of the cell corresponding to T0 from IMA yields a
71  // set containing E1, V0 and V1.
72  mln::p_set<P> attach_t0 = mln::make::attachment(ima, t0, adj_nbh);
73  mln_assertion(attach_t0.nsites() == 3);
74  mln_assertion(attach_t0.has(e1));
75  mln_assertion(attach_t0.has(v0));
76  mln_assertion(attach_t0.has(v2));
77 }