-
Notifications
You must be signed in to change notification settings - Fork 56
/
ply_to_tri_surface.html
336 lines (292 loc) · 9.11 KB
/
ply_to_tri_surface.html
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
<html>
<head>
<title>
PLY_TO_TRI_SURFACE - Convert data from PLY to TRI_SURFACE
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
PLY_TO_TRI_SURFACE <br> Convert data from PLY to TRI_SURFACE format
</h1>
<hr>
<p>
<b>PLY_TO_TRI_SURFACE</b>
is a MATLAB program which
reads data from a <b>PLY</b> file describing a polygonal
mesh of a 3D surface,and converts it to a pair of arrays
describing a triangular mesh or <b>TRI_SURFACE</b>.
</p>
<p>
A <b>PLY</b> file contains a sophisticated data structure describing
a polygonal surface. A triangulated mesh is a very simply case of
such a surface; a <b>PLY</b> file can also describe a mesh surface
involving higher order polygons, and it can contain auxilliary
information about normal vectors and so on.
</p>
<p>
A <b>TRI_SURFACE</b> or triangulated mesh surface, is described by a
pair of arrays:
<ul>
<li>
a <b>node coordinate</b> array containing the coordinates of nodes;
</li>
<li>
a <b>triangle node</b> array containing triples of the indices
of the nodes used to form each triangle;
</li>
</ul>
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
[ <i>node_xyz</i>, <i>triangle_node</i>] = <b>ply_to_tri_surface </b> ( <i>'ply_file_name'</i> )
</blockquote>
where
<ul>
<li>
<i>'ply_file_name'</i> is the name of the <b>PLY</b> file to be read;
</li>
<li>
<i>node_xyz</i> is the node coordinate array;
</li>
<li>
<i>triangle_node</i> is the triangle node array.
</li>
</ul>
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>PLY_TO_TRI_SURFACE</b> is available in
<a href = "../../m_src/ply_to_tri_surface/ply_to_tri_surface.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/bezier_surface_display/bezier_surface_display.html">
BEZIER_SURFACE_DISPLAY</a>,
a MATLAB program which
reads two files defining a Bezier surface and displays it.
</p>
<p>
<a href = "../../m_src/fem_basis_t3_display/fem_basis_t3_display.html">
FEM_BASIS_T3_DISPLAY</a>,
a MATLAB program which
displays a basis function associated with a linear triangle ("T3") mesh.
</p>
<p>
<a href = "../../m_src/fem_basis_t6_display/fem_basis_t6_display.html">
FEM_BASIS_T6_DISPLAY</a>,
a MATLAB program which
reads a quadratic triangle mesh and displays any associated basis function.
</p>
<p>
<a href = "../../m_src/obj_to_tri_surface/obj_to_tri_surface.html">
OBJ_TO_TRI_SURFACE</a>,
a MATLAB program which
reads an OBJ file and extracts
the surface mesh data as a TRI_SURFACE dataset.
</p>
<p>
<a href = "../../data/ply/ply.html">
PLY</a>,
a data directory which
contains a description and examples of PLY files.
</p>
<p>
<a href = "../../m_src/ply_display/ply_display.html">
PLY_DISPLAY</a>,
a MATLAB program which
displays an image of a 3D graphics file in PLY format;
</p>
<p>
<a href = "../../c_src/ply_io/ply_io.html">
PLY_IO</a>,
a C library which
reads or writes a PLY file.
</p>
<p>
<a href = "../../m_src/ply_io/ply_io.html">
PLY_IO</a>,
a MATLAB library which
reads or writes a <b>PLY</b> file.
</p>
<p>
<a href = "../../c_src/ply_to_obj/ply_to_obj.html">
PLY_TO_OBJ</a>,
a C program which
reads a PLY 3D graphics file and writes an equivalent OBJ graphics file.
</p>
<p>
<a href = "../../data/polygonal_surface/polygonal_surface.html">
POLYGONAL_SURFACE</a>,
a data directory which
contains examples of polygonal surface files.
</p>
<p>
<a href = "../../m_src/stla_display/stla_display.html">
STLA_DISPLAY</a>,
a MATLAB program which
reads an ASCII STL file and displays it.
</p>
<p>
<a href = "../../m_src/stla_to_tri_surface/stla_to_tri_surface.html">
STLA_TO_TRI_SURFACE</a>,
a MATLAB program which
reads an ASCII STL file and extracts
the surface mesh data as a TRI_SURFACE dataset.
</p>
<p>
<a href = "../../data/tri_surface/tri_surface.html">
TRI_SURFACE</a>,
a data directory which
contains examples of TRI_SURFACE files.
</p>
<p>
<a href = "../../m_src/tri_surface_display/tri_surface_display.html">
TRI_SURFACE_DISPLAY</a>,
a MATLAB program which
displays a TRI_SURFACE.
</p>
<p>
<a href = "../../m_src/tri_surface_io/tri_surface_io.html">
TRI_SURFACE_IO</a>,
a MATLAB library which
reads and writes the 3D graphics information
in a TRI_SURFACE file;
</p>
<p>
<a href = "../../m_src/tri_surface_to_ply/tri_surface_to_ply.html">
TRI_SURFACE_TO_PLY</a>,
a MATLAB program which
converts <b>TRI_SURFACE</b> data to
data suitable for storage as a PLY file.
</p>
<p>
<a href = "../../cpp_src/triangulation_display_opengl/triangulation_display_opengl.html">
TRIANGULATION_DISPLAY_OPENGL</a>,
a C++ program
which reads files defining a triangulation and displays an image
using OpenGL.
</p>
<h3 align = "center">
Author:
</h3>
<p>
The original versions of the files <b>PLY_READ.M</b> and
<b>PLY_TO_TRI_SURFACE.M</b> were created by Pascal Getreuer.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "i4mat_transpose_print_some.m">i4mat_transpose_print_some.m</a>,
prints some of the transpose of an I4MAT.
</li>
<li>
<a href = "i4mat_write0.m">i4mat_write0.m</a>,
writes an I4MAT file.
</li>
<li>
<a href = "ply_to_tri_surface.m">ply_to_tri_surface.m</a>
converts <b>PLY</b> data to <b>TRI_SURFACE</b> data.
</li>
<li>
<a href = "r8mat_transpose_print_some.m">r8mat_transpose_print_some.m</a>,
prints some of the transpose of an R8MAT.
</li>
<li>
<a href = "r8mat_write.m">r8mat_write.m</a>,
writes an R8MAT file.
</li>
<li>
<a href = "s_len_trim.m">s_len_trim.m</a>
returns the length of a string to the last nonblank.
</li>
<li>
<a href = "timestamp.m">timestamp.m</a>
prints the current YMDHMS date as a time stamp.
</li>
<li>
<a href = "tri_surface_write.m">tri_surface_write.m</a>
writes graphics information to a TRI_SURFACE file.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "ply_to_tri_surface_test.m">ply_to_tri_surface_test.m</a>
runs all the tests.
</li>
<li>
<a href = "ply_to_tri_surface_test_output.txt">ply_to_tri_surface_test_output.txt</a>
the output file.
</li>
<li>
<a href = "ply_to_tri_surface_test01.m">ply_to_tri_surface_test01.m</a>
reads <b>sphere.ply</b>, extracts the <b>TRI_SURFACE</b> version
of the data, and displays it.
</li>
<li>
<a href = "ply_to_tri_surface_test02.m">ply_to_tri_surface_test021.m</a>
reads <b>cube.ply</b>, extracts the <b>TRI_SURFACE</b> version
of the data, and writes it to a pair of TRI_SURFACE files.
</li>
<li>
<a href = "sphere.ply">sphere.ply</a>
a <b>PLY</b> file describing a sphere.
</li>
<li>
<a href = "sphere.png">sphere.png</a>
a PNG image
of MATLAB's display of the <b>TRI_SURFACE</b> data.
</li>
<li>
<a href = "cube.ply">cube.ply</a>
a <b>PLY</b> file describing a cube.
</li>
<li>
<a href = "cube_nodes.txt">cube_nodes.txt</a>
the TRI_SURFACE node file for the cube.
</li>
<li>
<a href = "cube_elements.txt">cube_elements.txt</a>
the TRI_SURFACE triangle file for the cube.
</li>
<li>
<a href = "cube.png">cube.png</a>
a PNG image
of MATLAB's display of the <b>TRI_SURFACE</b> data.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 05 December 2010.
</i>
<!-- John Burkardt -->
</body>
<!-- Initial HTML skeleton created by HTMLINDEX. -->
</html>