Mercurial > octave
annotate libinterp/dldfcn/convhulln.cc @ 21691:263d18409fdf
Eliminate unused variable warnings for conditionally compiled code.
We had more or less decided not to bother trying to eliminate all
these warnings for cases in which external dependencies are missing.
But then we get people trying to fix these in various ways, so we
might as well do it for all cases and use a consistent method.
* oct-conf-post.in.h (octave_unused_parameter): New function for C++
code and new macro for C code.
* mk-octave-config-h.sh: Emit octave_unused_parameter function and
macro for octave-config.h.
* CSparse.cc, __delaunayn__.cc, __eigs__.cc, __fltk_uigetfile__.cc,
__glpk__.cc, __magick_read__.cc, __osmesa_print__.cc, __voronoi__.cc,
amd.cc, audiodevinfo.cc, audioread.cc, ccolamd.cc, cdisplay.c,
colamd.cc, convhulln.cc, dSparse.cc, dmperm.cc, fftw.cc, gl-render.cc,
lo-error.c, load-save.cc, ls-hdf5.cc, ls-mat5.cc, oct-hdf5-types.cc,
ov-base-int.cc, ov-bool-mat.cc, ov-bool-sparse.cc, ov-bool.cc,
ov-cell.cc, ov-class.cc, ov-complex.cc, ov-cx-mat.cc, ov-cx-sparse.cc,
ov-fcn-handle.cc, ov-fcn-inline.cc, ov-float.cc, ov-flt-complex.cc,
ov-flt-cx-mat.cc, ov-flt-re-mat.cc, ov-java.cc, ov-range.cc,
ov-re-mat.cc, ov-re-sparse.cc, ov-scalar.cc, ov-str-mat.cc,
ov-struct.cc, sparse-chol.cc, sparse-dmsolve.cc, sparse-lu.cc,
sparse-qr.cc, sparse-util.cc, symbfact.cc: Use octave_unused_parameter
to eliminate warnings for conditionally compiled code.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 13 May 2016 09:36:14 -0400 |
parents | ad0599a0acc6 |
children | aba2e6293dd8 |
rev | line source |
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6823 | 1 /* |
2 | |
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3 Copyright (C) 2000-2015 Kai Habel |
6823 | 4 |
5 This file is part of Octave. | |
6 | |
7 Octave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
10 option) any later version. | |
6823 | 11 |
12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
7016 | 18 along with Octave; see the file COPYING. If not, see |
19 <http://www.gnu.org/licenses/>. | |
6823 | 20 |
21 */ | |
22 | |
23 /* | |
24 29. July 2000 - Kai Habel: first release | |
25 2002-04-22 Paul Kienzle | |
26 * Use warning(...) function rather than writing to cerr | |
27 2006-05-01 Tom Holroyd | |
28 * add support for consistent winding in all dimensions; output is | |
29 * guaranteed to be simplicial. | |
30 */ | |
31 | |
32 #ifdef HAVE_CONFIG_H | |
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33 # include "config.h" |
6823 | 34 #endif |
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35 |
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36 #include "oct-locbuf.h" |
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37 |
6823 | 38 #include "Cell.h" |
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39 #include "defun-dld.h" |
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40 #include "error.h" |
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41 #include "errwarn.h" |
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42 #include "ovl.h" |
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43 #include "parse.h" |
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44 #include "unwind-prot.h" |
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46 #if defined (HAVE_QHULL) |
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47 |
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48 # include "oct-qhull.h" |
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49 |
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50 # if defined (NEED_QHULL_VERSION) |
6823 | 51 char qh_version[] = "convhulln.oct 2007-07-24"; |
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52 # endif |
6823 | 53 |
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54 static void |
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55 close_fcn (FILE *f) |
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56 { |
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57 gnulib::fclose (f); |
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58 } |
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59 |
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60 static bool |
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61 octave_qhull_dims_ok (octave_idx_type dim, octave_idx_type n, const char *who) |
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62 { |
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63 if (sizeof (octave_idx_type) > sizeof (int)) |
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64 { |
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65 int maxval = std::numeric_limits<int>::max (); |
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66 |
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67 if (dim > maxval || n > maxval) |
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68 error ("%s: dimension too large for Qhull", who); |
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69 } |
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70 |
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71 return true; |
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72 } |
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73 |
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74 #endif |
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75 |
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76 DEFUN_DLD (convhulln, args, nargout, |
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77 "-*- texinfo -*-\n\ |
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78 @deftypefn {} {@var{h} =} convhulln (@var{pts})\n\ |
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79 @deftypefnx {} {@var{h} =} convhulln (@var{pts}, @var{options})\n\ |
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80 @deftypefnx {} {[@var{h}, @var{v}] =} convhulln (@dots{})\n\ |
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81 Compute the convex hull of the set of points @var{pts}.\n\ |
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82 \n\ |
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83 @var{pts} is a matrix of size [n, dim] containing n points in a space of\n\ |
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84 dimension dim.\n\ |
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85 \n\ |
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86 The hull @var{h} is an index vector into the set of points and specifies\n\ |
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87 which points form the enclosing hull.\n\ |
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88 \n\ |
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89 An optional second argument, which must be a string or cell array of\n\ |
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90 strings, contains options passed to the underlying qhull command. See the\n\ |
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91 documentation for the Qhull library for details\n\ |
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92 @url{http://www.qhull.org/html/qh-quick.htm#options}.\n\ |
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93 The default options depend on the dimension of the input:\n\ |
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94 \n\ |
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95 @itemize\n\ |
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96 @item 2D, 3D, 4D: @var{options} = @code{@{\"Qt\"@}}\n\ |
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97 \n\ |
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98 @item 5D and higher: @var{options} = @code{@{\"Qt\", \"Qx\"@}}\n\ |
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99 @end itemize\n\ |
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100 \n\ |
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101 If @var{options} is not present or @code{[]} then the default arguments are\n\ |
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102 used. Otherwise, @var{options} replaces the default argument list.\n\ |
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103 To append user options to the defaults it is necessary to repeat the\n\ |
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104 default arguments in @var{options}. Use a null string to pass no arguments.\n\ |
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105 \n\ |
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106 If the second output @var{v} is requested the volume of the enclosing\n\ |
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107 convex hull is calculated.\n\n\ |
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108 @seealso{convhull, delaunayn, voronoin}\n\ |
6823 | 109 @end deftypefn") |
110 { | |
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111 #if defined (HAVE_QHULL) |
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6959 | 113 int nargin = args.length (); |
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114 |
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115 if (nargin < 1 || nargin > 2) |
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116 print_usage (); |
6823 | 117 |
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118 octave_value_list retval; |
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119 |
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120 Matrix points (args(0).matrix_value ()); |
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121 const octave_idx_type dim = points.columns (); |
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122 const octave_idx_type num_points = points.rows (); |
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123 |
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124 if (! octave_qhull_dims_ok (dim, num_points, "convhulln")) |
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125 return retval; |
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126 |
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127 points = points.transpose (); |
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128 |
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129 std::string options; |
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130 |
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131 if (dim <= 4) |
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132 options = " Qt"; |
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133 else |
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134 options = " Qt Qx"; |
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135 |
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136 if (nargin == 2) |
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138 if (args(1).is_string ()) |
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139 options = " " + args(1).string_value (); |
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140 else if (args(1).is_empty ()) |
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141 ; // Use default options. |
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142 else if (args(1).is_cellstr ()) |
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143 { |
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144 options = ""; |
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145 |
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146 Array<std::string> tmp = args(1).cellstr_value (); |
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148 for (octave_idx_type i = 0; i < tmp.numel (); i++) |
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149 options += " " + tmp(i); |
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150 } |
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152 error ("convhulln: OPTIONS must be a string, cell array of strings, or empty"); |
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153 } |
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155 boolT ismalloc = false; |
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156 |
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157 unwind_protect frame; |
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158 |
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159 // Replace the outfile pointer with stdout for debugging information. |
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160 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM) |
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161 FILE *outfile = gnulib::fopen ("NUL", "w"); |
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162 #else |
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163 FILE *outfile = gnulib::fopen ("/dev/null", "w"); |
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164 #endif |
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165 FILE *errfile = stderr; |
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166 |
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167 if (! outfile) |
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168 error ("convhulln: unable to create temporary file for output"); |
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169 |
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170 frame.add_fcn (close_fcn, outfile); |
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171 |
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172 // qh_new_qhull command and points arguments are not const... |
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173 |
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174 std::string cmd = "qhull" + options; |
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175 |
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176 OCTAVE_LOCAL_BUFFER (char, cmd_str, cmd.length () + 1); |
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177 |
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178 strcpy (cmd_str, cmd.c_str ()); |
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179 |
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180 int exitcode = qh_new_qhull (dim, num_points, points.fortran_vec (), |
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181 ismalloc, cmd_str, outfile, errfile); |
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182 if (exitcode) |
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183 error ("convhulln: qhull failed"); |
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184 |
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185 bool nonsimp_seen = false; |
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186 |
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187 octave_idx_type nf = qh num_facets; |
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188 |
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189 Matrix idx (nf, dim + 1); |
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191 facetT *facet; |
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193 octave_idx_type i = 0; |
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194 |
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195 FORALLfacets |
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196 { |
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197 octave_idx_type j = 0; |
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198 |
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199 if (! (nonsimp_seen || facet->simplicial || qh hull_dim == 2)) |
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200 { |
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201 nonsimp_seen = true; |
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202 |
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203 if (cmd.find ("QJ") != std::string::npos) |
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204 // Should never happen with QJ. |
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205 error ("convhulln: qhull failed: option 'QJ' returned non-simplicial facet"); |
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206 } |
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207 |
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208 if (dim == 3) |
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209 { |
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210 setT *vertices = qh_facet3vertex (facet); |
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212 vertexT *vertex, **vertexp; |
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213 |
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214 FOREACHvertex_ (vertices) |
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215 idx(i, j++) = 1 + qh_pointid(vertex->point); |
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216 |
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217 qh_settempfree (&vertices); |
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218 } |
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219 else |
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220 { |
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221 if (facet->toporient ^ qh_ORIENTclock) |
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222 { |
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223 vertexT *vertex, **vertexp; |
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224 |
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225 FOREACHvertex_ (facet->vertices) |
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226 idx(i, j++) = 1 + qh_pointid(vertex->point); |
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227 } |
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228 else |
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229 { |
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230 vertexT *vertex, **vertexp; |
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231 |
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232 FOREACHvertexreverse12_ (facet->vertices) |
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233 idx(i, j++) = 1 + qh_pointid(vertex->point); |
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234 } |
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235 } |
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236 if (j < dim) |
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237 warning ("convhulln: facet %d only has %d vertices", i, j); |
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238 |
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239 i++; |
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240 } |
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241 |
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242 // Remove extra dimension if all facets were simplicial. |
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243 |
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244 if (! nonsimp_seen) |
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245 idx.resize (nf, dim, 0.0); |
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246 |
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247 if (nargout == 2) |
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248 { |
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249 // Calculate volume of convex hull, taken from qhull src/geom2.c. |
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250 |
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251 realT area; |
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252 realT dist; |
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253 |
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254 FORALLfacets |
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255 { |
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256 if (! facet->normal) |
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257 continue; |
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258 |
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259 if (facet->upperdelaunay && qh ATinfinity) |
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260 continue; |
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261 |
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262 facet->f.area = area = qh_facetarea (facet); |
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263 facet->isarea = True; |
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264 |
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265 if (qh DELAUNAY) |
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266 { |
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267 if (facet->upperdelaunay == qh UPPERdelaunay) |
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268 qh totarea += area; |
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269 } |
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270 else |
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271 { |
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272 qh totarea += area; |
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273 qh_distplane (qh interior_point, facet, &dist); |
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274 qh totvol += -dist * area/ qh hull_dim; |
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275 } |
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276 } |
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277 |
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278 retval(1) = octave_value (qh totvol); |
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279 } |
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280 |
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281 retval(0) = idx; |
6959 | 282 |
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283 // Free memory from Qhull |
6959 | 284 qh_freeqhull (! qh_ALL); |
285 | |
6823 | 286 int curlong, totlong; |
287 qh_memfreeshort (&curlong, &totlong); | |
288 | |
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289 if (curlong || totlong) |
6959 | 290 warning ("convhulln: did not free %d bytes of long memory (%d pieces)", |
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291 totlong, curlong); |
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292 |
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293 return retval; |
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294 |
6823 | 295 #else |
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296 |
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297 octave_unused_parameter (args); |
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298 octave_unused_parameter (nargout); |
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299 |
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300 err_disabled_feature ("convhulln", "Qhull"); |
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301 |
6823 | 302 #endif |
303 } | |
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304 |
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305 /* |
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306 %!testif HAVE_QHULL |
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307 %! cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1]; |
14310 | 308 %! [h, v] = convhulln (cube, "Qt"); |
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309 %! assert (size (h), [12 3]); |
14310 | 310 %! h = sortrows (sort (h, 2), [1:3]); |
311 %! assert (h, [1 2 4; 1 2 6; 1 4 8; 1 5 6; 1 5 8; 2 3 4; 2 3 7; 2 6 7; 3 4 7; 4 7 8; 5 6 7; 5 7 8]); | |
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312 %! assert (v, 1, 10*eps); |
14310 | 313 %! [h2, v2] = convhulln (cube); % Test defaut option = "Qt" |
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314 %! assert (size (h2), size (h)); |
14310 | 315 %! h2 = sortrows (sort (h2, 2), [1:3]); |
316 %! assert (h2, h); | |
317 %! assert (v2, v, 10*eps); | |
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318 |
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319 %!testif HAVE_QHULL |
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320 %! cube = [0 0 0;1 0 0;1 1 0;0 1 0;0 0 1;1 0 1;1 1 1;0 1 1]; |
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321 %! [h, v] = convhulln (cube, "QJ"); |
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322 %! assert (size (h), [12 3]); |
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323 %! assert (sortrows (sort (h, 2), [1:3]), [1 2 4; 1 2 5; 1 4 5; 2 3 4; 2 3 6; 2 5 6; 3 4 8; 3 6 7; 3 7 8; 4 5 8; 5 6 8; 6 7 8]); |
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324 %! assert (v, 1.0, 1e6*eps); |
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325 |
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326 %!testif HAVE_QHULL |
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327 %! tetrahedron = [1 1 1;-1 -1 1;-1 1 -1;1 -1 -1]; |
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328 %! [h, v] = convhulln (tetrahedron); |
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329 %! h = sortrows (sort (h, 2), [1 2 3]); |
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330 %! assert (h, [1 2 3;1 2 4; 1 3 4; 2 3 4]); |
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331 %! assert (v, 8/3, 10*eps); |
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332 |
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333 %!testif HAVE_QHULL |
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334 %! triangle=[0 0; 1 1; 1 0; 1 2]; |
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335 %! h = convhulln (triangle); |
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336 %! assert (size (h), [3 2]); |
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337 */ |