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
|
## Copyright (C) 2024 David Legland
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1 Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
## 2 Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in the
## documentation and/or other materials provided with the distribution.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
## AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
## ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
## ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
## SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
## CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##
## The views and conclusions contained in the software and documentation are
## those of the authors and should not be interpreted as representing official
## policies, either expressed or implied, of the copyright holders.
function writeMesh_off(fileName, vertices, faces)
%WRITEMESH_OFF Write a mesh into a text file in OFF format.
%
% writeMesh_off(FNAME, V, F)
%
% Example
% writeMesh_off
%
% See also
% meshes3d, writeMesh, readMesh_off, writeMesh_ply
% ------
% Author: David Legland
% E-mail: david.legland@inrae.fr
% Created: 2018-04-26, using Matlab 9.4.0.813654 (R2018a)
% Copyright 2018-2023 INRA - Cepia Software Platform
if ~ischar(fileName)
error('First argument must contain the name of the file');
end
% optionnaly parses data
if isstruct(vertices)
faces = vertices.faces;
vertices = vertices.vertices;
end
% open file for writing text
f = fopen(fileName, 'wt');
if (f == -1)
error('Couldn''t open the file %s', fileName);
end
% write the header line
fprintf(f, 'OFF\n');
% write number of vertices and of faces
nVertices = size(vertices, 1);
nFaces = size(faces, 1);
if iscell(faces)
nFaces = length(faces);
end
fprintf(f, '%d %d 0\n', nVertices, nFaces);
% Write vertex info
format = '%g %g %g\n';
for iv = 1:nVertices
fprintf(f, format, vertices(iv, :));
end
% Write face info
if isnumeric(faces)
% simply write face vertex indices
ns = size(faces, 2);
format = ['%d' repmat(' %d', 1, ns) '\n'];
for iFace = 1:nFaces
fprintf(f, format, ns, faces(iFace, :)-1);
end
else
% if faces are stored in a cell array, the number of vertices in each
% face may be different, and we need to process each face individually
for iFace = 1:nFaces
ns = length(faces{iFace});
format = ['%d' repmat(' %d', 1, ns) '\n'];
fprintf(f, format, ns, faces{iFace}-1);
end
end
% close the file
fclose(f);
|
