Mercurial > octave
annotate libinterp/dldfcn/__voronoi__.cc @ 21126:ba0a4b4f021d
include errwarn.h in files that use err_disabled_feature conditionally
* file-io.cc, __delaunayn__.cc, __fltk_uigetfile__.cc,
__init_fltk__.cc, __voronoi__.cc, convhulln.cc: Include errwarn.h.
* __voronoi__.cc: Define CALLER for __err_disabled_feature when
HAVE_QHULL is not defined.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 21 Jan 2016 11:24:36 -0500 |
parents | bd1752782e56 |
children | fcac5dbbf9ed |
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 20. Augiust 2000 - Kai Habel: first release | |
25 */ | |
26 | |
27 /* | |
28 2003-12-14 Rafael Laboissiere <rafael@laboissiere.net> | |
29 Added optional second argument to pass options to the underlying | |
30 qhull command | |
31 */ | |
32 | |
33 #ifdef HAVE_CONFIG_H | |
34 #include <config.h> | |
35 #endif | |
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36 |
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37 #include <cstdio> |
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38 |
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39 #include <list> |
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40 |
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41 #include "oct-locbuf.h" |
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42 #include "lo-ieee.h" |
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43 |
6823 | 44 #include "Cell.h" |
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45 #include "defun-dld.h" |
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46 #include "error.h" |
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47 #include "errwarn.h" |
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48 #include "ovl.h" |
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49 #include "unwind-prot.h" |
6823 | 50 |
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51 #if defined (HAVE_QHULL) |
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52 # include "oct-qhull.h" |
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53 # if defined (NEED_QHULL_VERSION) |
6823 | 54 char qh_version[] = "__voronoi__.oct 2007-07-24"; |
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55 # endif |
6823 | 56 #endif |
57 | |
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58 static void |
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59 close_fcn (FILE *f) |
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60 { |
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61 gnulib::fclose (f); |
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62 } |
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63 |
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64 static bool |
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65 octave_qhull_dims_ok (octave_idx_type dim, octave_idx_type n, const char *who) |
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66 { |
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67 if (sizeof (octave_idx_type) > sizeof (int)) |
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68 { |
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69 int maxval = std::numeric_limits<int>::max (); |
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70 |
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71 if (dim > maxval || n > maxval) |
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72 error ("%s: dimension too large for Qhull", who); |
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73 } |
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74 |
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75 return true; |
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76 } |
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77 |
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78 DEFUN_DLD (__voronoi__, args, , |
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79 "-*- texinfo -*-\n\ |
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80 @deftypefn {} {@var{C}, @var{F} =} __voronoi__ (@var{caller}, @var{pts})\n\ |
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81 @deftypefnx {} {@var{C}, @var{F} =} __voronoi__ (@var{caller}, @var{pts}, @var{options})\n\ |
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82 @deftypefnx {} {@var{C}, @var{F}, @var{Inf_Pts} =} __voronoi__ (@dots{})\n\ |
6945 | 83 Undocumented internal function.\n\ |
6823 | 84 @end deftypefn") |
85 { | |
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86 #if defined (HAVE_QHULL) |
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87 int nargin = args.length (); |
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88 |
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89 if (nargin < 2 || nargin > 3) |
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90 print_usage (); |
6945 | 91 |
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92 std::string caller = args(0).xstring_value ("__voronoi__: CALLER must be a string"); |
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93 |
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94 octave_value_list retval; |
6823 | 95 |
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96 Matrix points = args(1).matrix_value (); |
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97 const octave_idx_type dim = points.columns (); |
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98 const octave_idx_type num_points = points.rows (); |
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99 |
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100 if (! octave_qhull_dims_ok (dim, num_points, "__voronoi__")) |
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101 return ovl (0.0); |
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102 |
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103 points = points.transpose (); |
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105 std::string options; |
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106 |
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107 if (dim <= 3) |
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108 options = " Qbb"; |
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109 else |
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110 options = " Qbb Qx"; |
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111 |
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112 if (nargin == 3) |
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113 { |
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114 octave_value opt_arg = args(2); |
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115 |
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116 if (opt_arg.is_string ()) |
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117 options = " " + opt_arg.string_value (); |
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118 else if (opt_arg.is_empty ()) |
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119 ; // Use default options. |
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120 else if (opt_arg.is_cellstr ()) |
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121 { |
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122 options = ""; |
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123 |
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124 Array<std::string> tmp = opt_arg.cellstr_value (); |
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125 |
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126 for (octave_idx_type i = 0; i < tmp.numel (); i++) |
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127 options += " " + tmp(i); |
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128 } |
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129 else |
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130 error ("%s: OPTIONS must be a string, cell array of strings, or empty", |
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131 caller.c_str ()); |
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132 } |
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133 |
6823 | 134 boolT ismalloc = false; |
135 | |
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136 unwind_protect frame; |
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137 |
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138 // Replace the outfile pointer with stdout for debugging information. |
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139 #if defined (OCTAVE_HAVE_WINDOWS_FILESYSTEM) && ! defined (OCTAVE_HAVE_POSIX_FILESYSTEM) |
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140 FILE *outfile = gnulib::fopen ("NUL", "w"); |
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141 #else |
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142 FILE *outfile = gnulib::fopen ("/dev/null", "w"); |
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143 #endif |
6880 | 144 FILE *errfile = stderr; |
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145 |
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146 if (! outfile) |
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147 error ("__voronoi__: unable to create temporary file for output"); |
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149 frame.add_fcn (close_fcn, outfile); |
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150 |
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151 // qh_new_qhull command and points arguments are not const... |
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152 |
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153 std::string cmd = "qhull v" + options; |
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154 |
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155 OCTAVE_LOCAL_BUFFER (char, cmd_str, cmd.length () + 1); |
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156 |
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157 strcpy (cmd_str, cmd.c_str ()); |
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158 |
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159 int exitcode = qh_new_qhull (dim, num_points, points.fortran_vec (), |
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160 ismalloc, cmd_str, outfile, errfile); |
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161 if (exitcode) |
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162 error ("%s: qhull failed", caller.c_str ()); |
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163 |
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164 // Calling findgood_all provides the number of Voronoi vertices |
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165 // (sets qh num_good). |
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166 |
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167 qh_findgood_all (qh facet_list); |
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168 |
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169 octave_idx_type num_voronoi_regions |
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170 = qh num_vertices - qh_setsize (qh del_vertices); |
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171 |
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172 octave_idx_type num_voronoi_vertices = qh num_good; |
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173 |
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174 // Find the voronoi centers for all facets. |
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175 |
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176 qh_setvoronoi_all (); |
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177 |
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178 facetT *facet; |
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179 vertexT *vertex; |
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180 octave_idx_type k; |
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182 // Find the number of Voronoi vertices for each Voronoi cell and |
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183 // store them in NI so we can use them later to set the dimensions |
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184 // of the RowVector objects used to collect them. |
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185 |
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186 FORALLfacets |
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187 { |
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188 facet->seen = false; |
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189 } |
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191 OCTAVE_LOCAL_BUFFER (octave_idx_type, ni, num_voronoi_regions); |
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192 for (octave_idx_type i = 0; i < num_voronoi_regions; i++) |
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193 ni[i] = 0; |
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194 |
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195 k = 0; |
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196 |
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197 FORALLvertices |
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198 { |
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199 if (qh hull_dim == 3) |
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200 qh_order_vertexneighbors (vertex); |
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201 |
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202 bool infinity_seen = false; |
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204 facetT *neighbor, **neighborp; |
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205 |
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206 FOREACHneighbor_ (vertex) |
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207 { |
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208 if (neighbor->upperdelaunay) |
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209 { |
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210 if (! infinity_seen) |
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211 { |
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212 infinity_seen = true; |
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213 ni[k]++; |
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214 } |
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215 } |
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216 else |
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217 { |
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218 neighbor->seen = true; |
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219 ni[k]++; |
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220 } |
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221 } |
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223 k++; |
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224 } |
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225 |
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226 // If Qhull finds fewer regions than points, we will pad the end |
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227 // of the at_inf and C arrays so that they always contain at least |
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228 // as many elements as the given points array. |
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229 |
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230 // FIXME: is it possible (or does it make sense) for |
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231 // num_voronoi_regions to ever be larger than num_points? |
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232 |
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233 octave_idx_type nr = (num_points > num_voronoi_regions |
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234 ? num_points : num_voronoi_regions); |
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235 |
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236 boolMatrix at_inf (nr, 1, false); |
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237 |
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238 // The list of Voronoi vertices. The first element is always |
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239 // Inf. |
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240 Matrix F (num_voronoi_vertices+1, dim); |
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241 |
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242 for (octave_idx_type d = 0; d < dim; d++) |
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243 F(0,d) = octave_Inf; |
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244 |
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245 // The cell array of vectors of indices into F that represent the |
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246 // vertices of the Voronoi regions (cells). |
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247 |
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248 Cell C (nr, 1); |
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249 |
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250 // Now loop through the list of vertices again and store the |
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251 // coordinates of the Voronoi vertices and the lists of indices |
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252 // for the cells. |
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253 |
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254 FORALLfacets |
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255 { |
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256 facet->seen = false; |
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257 } |
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258 |
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259 octave_idx_type i = 0; |
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260 k = 0; |
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261 |
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262 FORALLvertices |
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263 { |
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264 if (qh hull_dim == 3) |
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265 qh_order_vertexneighbors (vertex); |
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266 |
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267 bool infinity_seen = false; |
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268 |
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269 octave_idx_type idx = qh_pointid (vertex->point); |
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270 |
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271 octave_idx_type num_vertices = ni[k++]; |
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273 // Qhull seems to sometimes produces regions with a single |
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274 // vertex. Is that a bug? How can a region have just one |
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275 // vertex? Let's skip it. |
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276 |
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277 if (num_vertices == 1) |
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278 continue; |
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279 |
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280 RowVector facet_list (num_vertices); |
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281 |
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282 octave_idx_type m = 0; |
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283 |
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284 facetT *neighbor, **neighborp; |
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285 |
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286 FOREACHneighbor_(vertex) |
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287 { |
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288 if (neighbor->upperdelaunay) |
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289 { |
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290 if (! infinity_seen) |
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291 { |
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292 infinity_seen = true; |
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293 facet_list(m++) = 1; |
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294 at_inf(idx) = true; |
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295 } |
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296 } |
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297 else |
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298 { |
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299 if (! neighbor->seen) |
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300 { |
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301 i++; |
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302 for (octave_idx_type d = 0; d < dim; d++) |
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303 F(i,d) = neighbor->center[d]; |
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304 |
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305 neighbor->seen = true; |
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306 neighbor->visitid = i; |
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307 } |
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308 |
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309 facet_list(m++) = neighbor->visitid + 1; |
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310 } |
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311 } |
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313 C(idx) = facet_list; |
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315 |
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316 retval = ovl (F, C, at_inf); |
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318 // Free memory from Qhull |
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319 qh_freeqhull (! qh_ALL); |
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320 |
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321 int curlong, totlong; |
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322 qh_memfreeshort (&curlong, &totlong); |
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323 |
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324 if (curlong || totlong) |
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325 warning ("%s: qhull did not free %d bytes of long memory (%d pieces)", |
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326 caller.c_str (), totlong, curlong); |
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327 |
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328 return retval; |
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329 |
6823 | 330 #else |
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331 std::string caller |
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332 = (args.length () > 0 |
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333 ? args(0).xstring_value ("__voronoi__: CALLER must be a string") |
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334 : std::string ("__voronoi__")); |
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335 |
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336 err_disabled_feature (caller, "Qhull"); |
6823 | 337 #endif |
338 } | |
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339 |
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340 /* |
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341 ## No test needed for internal helper function. |
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342 %!assert (1) |
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343 */ |