Mercurial > octave
annotate libinterp/corefcn/tsearch.cc @ 21966:112b20240c87
move docstrings in C++ files out of C strings and into comments
* __contourc__.cc, __dispatch__.cc, __dsearchn__.cc, __ichol__.cc,
__ilu__.cc, __lin_interpn__.cc, __luinc__.cc, __magick_read__.cc,
__pchip_deriv__.cc, __qp__.cc, balance.cc, besselj.cc, betainc.cc,
bitfcns.cc, bsxfun.cc, cellfun.cc, colloc.cc, conv2.cc, daspk.cc,
dasrt.cc, dassl.cc, data.cc, debug.cc, defaults.cc, det.cc, dirfns.cc,
dlmread.cc, dot.cc, eig.cc, ellipj.cc, error.cc, fft.cc, fft2.cc,
fftn.cc, file-io.cc, filter.cc, find.cc, gammainc.cc, gcd.cc,
getgrent.cc, getpwent.cc, getrusage.cc, givens.cc, graphics.cc,
hash.cc, help.cc, hess.cc, hex2num.cc, input.cc, inv.cc, kron.cc,
load-path.cc, load-save.cc, lookup.cc, ls-oct-text.cc, lsode.cc,
lu.cc, mappers.cc, matrix_type.cc, max.cc, mgorth.cc, nproc.cc,
oct-hist.cc, octave-link.cc, ordschur.cc, pager.cc, pinv.cc,
pr-output.cc, profiler.cc, psi.cc, pt-jit.cc, quad.cc, quadcc.cc,
qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, sighandlers.cc,
sparse.cc, spparms.cc, sqrtm.cc, str2double.cc, strfind.cc, strfns.cc,
sub2ind.cc, svd.cc, sylvester.cc, symtab.cc, syscalls.cc, sysdep.cc,
time.cc, toplev.cc, tril.cc, tsearch.cc, typecast.cc, urlwrite.cc,
utils.cc, variables.cc, __delaunayn__.cc, __eigs__.cc,
__fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc,
audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc,
convhulln.cc, dmperm.cc, fftw.cc, qr.cc, symbfact.cc, symrcm.cc,
ov-base.cc, ov-bool-mat.cc, ov-cell.cc, ov-class.cc, ov-classdef.cc,
ov-fcn-handle.cc, ov-fcn-inline.cc, ov-flt-re-mat.cc, ov-int16.cc,
ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-java.cc, ov-null-mat.cc,
ov-oncleanup.cc, ov-range.cc, ov-re-mat.cc, ov-struct.cc,
ov-typeinfo.cc, ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc,
ov-usr-fcn.cc, ov.cc, octave.cc, pt-arg-list.cc, pt-binop.cc,
pt-eval.cc, pt-mat.cc, lex.ll, oct-parse.in.yy:
Docstrings are now comments instead of C strings.
* build-aux/mk-opts.pl: Emit docstrings as comments instead of C
strings.
* DASPK-opts.in, LSODE-opts.in: Don't quote " in docstring fragments.
* builtins.h: Include builtin-defun-decls.h unconditionally.
* defun.h (DEFUN, DEFUNX, DEFCONSTFUN): Simply emit declaration.
(DEFALIAS): Always expand to nothing.
* defun-dld.h: No special macro expansions for MAKE_BUILTINS.
(DEFUN_DLD): Use FORWARD_DECLARE_FUN.
(DEFUNX_DLD): Use FORWARD_DECLARE_FUNX.
* defun-int.h: No special macro expansions for MAKE_BUILTINS.
(FORWARD_DECLARE_FUN, FORWARD_DECLARE_FUNX): New macros.
(DEFINE_FUN_INSTALLER_FUN): If compiling an Octave source file, pass
"external-doc" to DEFINE_FUNX_INSTALLER_FUN.
(DEFUN_INTERNAL, DEFCONSTFUN_INTERNAL, DEFUNX_INTERNAL,
DEFALIAS_INTERNAL): Delete.
* common.mk (move_if_change_rule): New macro.
(simple_move_if_change_rule): Define using move_if_change_rule.
* find-defun-files.sh (DEFUN_PATTERN): Update. Don't transform file
name extension to ".df".
* libinterp/mk-pkg-add, gendoc.pl: Operate directly on source files.
* mkbuiltins: New argument, SRCDIR. Operate directly on source files.
* mkdefs: Delete.
* libinterp/module.mk (BUILT_SOURCES): Update list to contain only
files included in other source files.
(GENERATED_MAKE_BUILTINS_INCS, DEF_FILES): Delete.
(LIBINTERP_BUILT_DISTFILES): Include $(OPT_HANDLERS) here.
(LIBINTERP_BUILT_NODISTFILES): Not here. Remove $(ALL_DEF_FILES from
the list.
(libinterp_EXTRA_DIST): Remove mkdefs from the list.
(FOUND_DEFUN_FILES): Rename from SRC_DEF_FILES.
(DLDFCN_DEFUN_FILES): Rename from DLDFCN_DEF_FILES.
(SRC_DEFUN_FILES): Rename from SRC_DEF_FILES.
(ALL_DEFUN_FILES): Rename from ALL_DEF_FILES.
(%.df: %.cc): Delete pattern rule.
(libinterp/build-env-features.cc, libinterp/builtins.cc,
libinterp/dldfcn/PKG_ADD): Use mv instead of move-if-change.
(libinterp/builtins.cc, libinterp/builtin-defun-decls.h):
Update mkbuiltins command.
($(srcdir)/libinterp/DOCSTRINGS): Update gendoc.pl command.
* liboctave/module.mk (BUILT_SOURCES): Don't include
liboctave-build-info.cc in the list.
author | John W. Eaton <jwe@octave.org> |
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date | Tue, 21 Jun 2016 16:07:51 -0400 |
parents | aba2e6293dd8 |
children | bac0d6f07a3e |
rev | line source |
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6823 | 1 /* |
2 | |
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3 Copyright (C) 2002-2015 Andreas Stahel |
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 | |
7016 | 23 // Author: Andreas Stahel <Andreas.Stahel@hta-bi.bfh.ch> |
24 | |
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25 #if defined (HAVE_CONFIG_H) |
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26 # include "config.h" |
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27 #endif |
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28 |
6823 | 29 #include "lo-ieee.h" |
7231 | 30 #include "lo-math.h" |
6823 | 31 |
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32 #include "defun.h" |
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33 #include "error.h" |
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34 #include "ovl.h" |
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35 |
10550 | 36 inline double max (double a, double b, double c) |
6823 | 37 { |
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38 if (a < b) |
10550 | 39 return (b < c ? c : b); |
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40 else |
10550 | 41 return (a < c ? c : a); |
6823 | 42 } |
43 | |
10550 | 44 inline double min (double a, double b, double c) |
6823 | 45 { |
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46 if (a > b) |
10550 | 47 return (b > c ? c : b); |
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48 else |
10550 | 49 return (a > c ? c : a); |
6823 | 50 } |
51 | |
52 #define REF(x,k,i) x(static_cast<octave_idx_type>(elem((k), (i))) - 1) | |
53 | |
54 // for large data set the algorithm is very slow | |
55 // one should presort (how?) either the elements of the points of evaluation | |
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56 // to cut down the time needed to decide which triangle contains the |
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57 // given point |
6823 | 58 |
59 // e.g., build up a neighbouring triangle structure and use a simplex-like | |
60 // method to traverse it | |
61 | |
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62 DEFUN (tsearch, args, , |
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63 doc: /* -*- texinfo -*- |
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64 @deftypefn {} {@var{idx} =} tsearch (@var{x}, @var{y}, @var{t}, @var{xi}, @var{yi}) |
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65 Search for the enclosing Delaunay convex hull. |
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66 |
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67 For @code{@var{t} = delaunay (@var{x}, @var{y})}, finds the index in @var{t} |
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68 containing the points @code{(@var{xi}, @var{yi})}. For points outside the |
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69 convex hull, @var{idx} is NaN. |
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70 @seealso{delaunay, delaunayn} |
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71 @end deftypefn */) |
6823 | 72 { |
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73 if (args.length () != 5) |
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74 print_usage (); |
6823 | 75 |
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76 const double eps = 1.0e-12; |
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77 |
10550 | 78 const ColumnVector x (args(0).vector_value ()); |
79 const ColumnVector y (args(1).vector_value ()); | |
80 const Matrix elem (args(2).matrix_value ()); | |
81 const ColumnVector xi (args(3).vector_value ()); | |
82 const ColumnVector yi (args(4).vector_value ()); | |
6823 | 83 |
10550 | 84 const octave_idx_type nelem = elem.rows (); |
6823 | 85 |
10550 | 86 ColumnVector minx (nelem); |
87 ColumnVector maxx (nelem); | |
88 ColumnVector miny (nelem); | |
89 ColumnVector maxy (nelem); | |
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90 for (octave_idx_type k = 0; k < nelem; k++) |
6823 | 91 { |
10550 | 92 minx(k) = min (REF (x, k, 0), REF (x, k, 1), REF (x, k, 2)) - eps; |
93 maxx(k) = max (REF (x, k, 0), REF (x, k, 1), REF (x, k, 2)) + eps; | |
94 miny(k) = min (REF (y, k, 0), REF (y, k, 1), REF (y, k, 2)) - eps; | |
95 maxy(k) = max (REF (y, k, 0), REF (y, k, 1), REF (y, k, 2)) + eps; | |
6823 | 96 } |
97 | |
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98 const octave_idx_type np = xi.numel (); |
10550 | 99 ColumnVector values (np); |
6823 | 100 |
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101 double x0, y0, a11, a12, a21, a22, det; |
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102 x0 = y0 = 0.0; |
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103 a11 = a12 = a21 = a22 = 0.0; |
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104 det = 0.0; |
6823 | 105 |
106 octave_idx_type k = nelem; // k is a counter of elements | |
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107 for (octave_idx_type kp = 0; kp < np; kp++) |
6823 | 108 { |
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109 const double xt = xi(kp); |
6823 | 110 const double yt = yi(kp); |
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111 |
6823 | 112 // check if last triangle contains the next point |
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113 if (k < nelem) |
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114 { |
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115 const double dx1 = xt - x0; |
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116 const double dx2 = yt - y0; |
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117 const double c1 = (a22 * dx1 - a21 * dx2) / det; |
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118 const double c2 = (-a12 * dx1 + a11 * dx2) / det; |
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119 if (c1 >= -eps && c2 >= -eps && (c1 + c2) <= (1 + eps)) |
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120 { |
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121 values(kp) = double(k+1); |
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122 continue; |
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123 } |
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124 } |
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125 |
6823 | 126 // it doesn't, so go through all elements |
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127 for (k = 0; k < nelem; k++) |
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128 { |
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129 OCTAVE_QUIT; |
10550 | 130 if (xt >= minx(k) && xt <= maxx(k) && yt >= miny(k) && yt <= maxy(k)) |
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131 { |
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132 // element inside the minimum rectangle: examine it closely |
10550 | 133 x0 = REF (x, k, 0); |
134 y0 = REF (y, k, 0); | |
135 a11 = REF (x, k, 1) - x0; | |
136 a12 = REF (y, k, 1) - y0; | |
137 a21 = REF (x, k, 2) - x0; | |
138 a22 = REF (y, k, 2) - y0; | |
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139 det = a11 * a22 - a21 * a12; |
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140 |
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141 // solve the system |
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142 const double dx1 = xt - x0; |
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143 const double dx2 = yt - y0; |
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144 const double c1 = (a22 * dx1 - a21 * dx2) / det; |
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145 const double c2 = (-a12 * dx1 + a11 * dx2) / det; |
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146 if ((c1 >= -eps) && (c2 >= -eps) && ((c1 + c2) <= (1 + eps))) |
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147 { |
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148 values(kp) = double(k+1); |
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149 break; |
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150 } |
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151 } //endif # examine this element closely |
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152 } //endfor # each element |
6823 | 153 |
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154 if (k == nelem) |
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155 values(kp) = lo_ieee_nan_value (); |
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156 |
6823 | 157 } //endfor # kp |
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158 |
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159 return ovl (values); |
6823 | 160 } |
161 | |
162 /* | |
163 %!shared x, y, tri | |
164 %! x = [-1;-1;1]; | |
165 %! y = [-1;1;-1]; | |
166 %! tri = [1, 2, 3]; | |
167 %!assert (tsearch (x,y,tri,-1,-1), 1) | |
168 %!assert (tsearch (x,y,tri, 1,-1), 1) | |
169 %!assert (tsearch (x,y,tri,-1, 1), 1) | |
170 %!assert (tsearch (x,y,tri,-1/3, -1/3), 1) | |
171 %!assert (tsearch (x,y,tri, 1, 1), NaN) | |
172 | |
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173 %!error tsearch () |
6823 | 174 */ |