writeOBJ.C
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1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration | Website: https://openfoam.org
5  \\ / A nd | Copyright (C) 2011-2018 OpenFOAM Foundation
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
11  OpenFOAM is free software: you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation, either version 3 of the License, or
14  (at your option) any later version.
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18  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19  for more details.
20 
21  You should have received a copy of the GNU General Public License
22  along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
23 
24 Description
25  Lightwave OBJ format.
26 
27  Note: Java obj loader does not support '#' on line
28 
29 \*---------------------------------------------------------------------------*/
30 
31 #include "triSurface.H"
32 
33 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
34 
35 namespace Foam
36 {
37 
38 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
39 
40 void triSurface::writeOBJ(const bool writeSorted, Ostream& os) const
41 {
42  // Write header
43  os << "# Wavefront OBJ file" << nl
44  << "# Regions:" << nl;
45 
47 
48  surfacePatchList patches(calcPatches(faceMap));
49 
50  const pointField& ps = points();
51 
52  // Print patch names as comment
54  {
55  os << "# " << patchi << " "
56  << patches[patchi].name() << nl;
57  }
58  os << "#" << nl;
59 
60  os << "# points : " << ps.size() << nl
61  << "# triangles : " << size() << nl
62  << "#" << nl;
63 
64 
65  // Write vertex coords
66  forAll(ps, pointi)
67  {
68  os << "v "
69  << ps[pointi].x() << ' '
70  << ps[pointi].y() << ' '
71  << ps[pointi].z() << nl;
72  }
73 
74  if (writeSorted)
75  {
76  label faceIndex = 0;
77 
79  {
80  // Print all faces belonging to this patch
81 
82  os << "g " << patches[patchi].name() << nl;
83 
84  for
85  (
86  label patchFacei = 0;
87  patchFacei < patches[patchi].size();
88  patchFacei++
89  )
90  {
91  const label facei = faceMap[faceIndex++];
92 
93  os << "f "
94  << operator[](facei)[0] + 1 << ' '
95  << operator[](facei)[1] + 1 << ' '
96  << operator[](facei)[2] + 1
97  //<< " # " << operator[](facei).region()
98  << nl;
99  }
100  }
101  }
102  else
103  {
104  // Get patch (=compact region) per face
105  labelList patchIDs(size());
107  {
108  label facei = patches[patchi].start();
109 
110  forAll(patches[patchi], i)
111  {
112  patchIDs[faceMap[facei++]] = patchi;
113  }
114  }
115 
116 
117  label prevPatchi = -1;
118 
119  forAll(*this, facei)
120  {
121  if (prevPatchi != patchIDs[facei])
122  {
123  prevPatchi = patchIDs[facei];
124  os << "g " << patches[patchIDs[facei]].name() << nl;
125  }
126  os << "f "
127  << operator[](facei)[0] + 1 << ' '
128  << operator[](facei)[1] + 1 << ' '
129  << operator[](facei)[2] + 1
130  << nl;
131  }
132  }
133 }
134 
135 
136 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
137 
138 } // End namespace Foam
139 
140 // ************************************************************************* //
#define forAll(list, i)
Loop across all elements in list.
Definition: UList.H:434
label size() const
Return the number of elements in the UList.
Definition: ListI.H:171
void size(const label)
Override size to be inconsistent with allocated storage.
Definition: ListI.H:164
const Field< PointType > & points() const
Return reference to global points.
T & operator[](const label)
Return element of UList.
Definition: UListI.H:167
const geometricSurfacePatchList & patches() const
Definition: triSurface.H:322
label patchi
Namespace for OpenFOAM.
List< label > labelList
A List of labels.
Definition: labelList.H:56
intWM_LABEL_SIZE_t label
A label is an int32_t or int64_t as specified by the pre-processor macro WM_LABEL_SIZE.
Definition: label.H:59
vectorField pointField
pointField is a vectorField.
Definition: pointFieldFwd.H:42
Pair< int > faceMap(const label facePi, const face &faceP, const label faceNi, const face &faceN)
static const char nl
Definition: Ostream.H:266
List< surfacePatch > surfacePatchList