makemesh

   1 #!/usr/bin/perl -w
   2
   3 #=======================================================================
   4 # $Id$
   5 # Create random 3D surface for use in plotting programs.
   6 #
   7 # Character set: UTF-8
   8 # ©opyleft 2007– Øyvind A. Holm <sunny@sunbase.org>
   9 # License: GNU General Public License version 2 or later, see end of
  10 # file for legal stuff.
  11 #=======================================================================
  12
  13 use strict;
  14 use Getopt::Long;
  15
  16 $| = 1;
  17
  18 our $Debug = 0;
  19
  20 our %Opt = (
  21     'debug' => 0,
  22     'help' => 0,
  23     'max' => 1000,
  24     'min' => 0,
  25     'verbose' => 0,
  26     'version' => 0,
  27 );
  28
  29 our $progname = $0;
  30 $progname =~ s#^.*/(.*?)$#$1#;
  31
  32 my $rcs_id = '$Id$';
  33 my $id_date = $rcs_id;
  34 $id_date =~ s/^.*?\d+ (\d\d\d\d-.*?\d\d:\d\d:\d\d\S+).*/$1/;
  35
  36 Getopt::Long::Configure("bundling");
  37 GetOptions(
  38     "debug" => \$Opt{'debug'},
  39     "help|h" => \$Opt{'help'},
  40     "max=f" => \$Opt{'max'},
  41     "min=f" => \$Opt{'min'},
  42     "verbose|v+" => \$Opt{'verbose'},
  43     "version" => \$Opt{'version'},
  44 ) || die("$progname: Option error. Use -h for help.\n");
  45
  46 $Opt{'debug'} && ($Debug = 1);
  47 $Opt{'help'} && usage(0);
  48 $Opt{'version'} && print_version();
  49
  50 my ($Lat, $Lon) =
  51     (  0,    0);
  52
  53 my @Ele = ();
  54
  55 my $Size = 20;
  56
  57 while (1) {
  58     D("Lon = '$Lon'");
  59     for $Lon (0..$Size) {
  60         my $Left = defined($Ele[$Lat][$Lon-1]) ? $Ele[$Lat][$Lon-1]  : rand(1);
  61         my $Right = defined($Ele[$Lat][$Lon+1]) ? $Ele[$Lat][$Lon+1] : rand(1);
  62         my $Over = defined($Ele[$Lat+1][$Lon]) ? $Ele[$Lat+1][$Lon]  : rand(1);
  63         my $Under = defined($Ele[$Lat-1][$Lon]) ? $Ele[$Lat-1][$Lon] : rand(1);
  64         my $Curr = ($Left+$Right+$Over+$Under)/4;
  65         $Curr += rand(1) >= 0.5 ? rand(1) : 0-rand(1);
  66         # until ($Curr >= $Opt{'min'}) {
  67         #     D("Curr >= Min");
  68         #     $Curr += rand(1) * 1.0;
  69         # }
  70         # until ($Curr <= $Opt{'max'}) {
  71         #     D("Curr <= Max");
  72         #     $Curr -= rand(1) * 1.0;
  73         # }
  74         if ($Lat > 0 && $Lat < $Size && $Lon > 0 && $Lon < $Size) {
  75             # print("$Lat\t$Lon\t$Curr\n");
  76             # print($Lat   . "\t" . $Lon-1 . "\t" . $Left  . "\n");
  77             print($Lat   . "\t" . $Lon   . "\t" . $Curr  . "\n");
  78             # print("\n");
  79             print($Lat+1 . "\t" . $Lon   . "\t" . $Over  . "\n");
  80             print($Lat   . "\t" . $Lon   . "\t" . $Curr  . "\n");
  81             # print("\n");
  82             # print($Lat   . "\t" . $Lon+1 . "\t" . $Right . "\n");
  83             print($Lat   . "\t" . $Lon   . "\t" . $Curr  . "\n");
  84             # print("\n");
  85             print($Lat-1 . "\t" . $Lon   . "\t" . $Under . "\n");
  86             print($Lat   . "\t" . $Lon   . "\t" . $Curr  . "\n");
  87             # print("\n");
  88         }
  89         $Ele[$Lat][$Lon] = $Curr;
  90         print("\n");
  91     }
  92     $Lat += 1;
  93     last if ($Lat > $Size);
  94 }
  95
  96 sub print_version {
  97     # Print program version {{{
  98     print("$rcs_id\n");
  99     exit(0);
 100     # }}}
 101 } # print_version()
 102
 103 sub usage {
 104     # Send the help message to stdout {{{
 105     my $Retval = shift;
 106
 107     print(<<END);
 108
 109 $rcs_id
 110
 111 Usage: $progname [options] [file [files [...]]]
 112
 113 Options:
 114
 115   -h, --help
 116     Show this help.
 117   -v, --verbose
 118     Increase level of verbosity. Can be repeated.
 119   --version
 120     Print version information.
 121   --debug
 122     Print debugging messages.
 123
 124 END
 125     exit($Retval);
 126     # }}}
 127 } # usage()
 128
 129 sub msg {
 130     # Print a status message to stderr based on verbosity level {{{
 131     my ($verbose_level, $Txt) = @_;
 132
 133     if ($Opt{'verbose'} >= $verbose_level) {
 134         print(STDERR "$progname: $Txt\n");
 135     }
 136     # }}}
 137 } # msg()
 138
 139 sub D {
 140     # Print a debugging message {{{
 141     $Debug || return;
 142     my @call_info = caller;
 143     chomp(my $Txt = shift);
 144     my $File = $call_info[1];
 145     $File =~ s#\\#/#g;
 146     $File =~ s#^.*/(.*?)$#$1#;
 147     print(STDERR "$File:$call_info[2] $$ $Txt\n");
 148     return("");
 149     # }}}
 150 } # D()
 151
 152 __END__
 153
 154 # Plain Old Documentation (POD) {{{
 155
 156 =pod
 157
 158 =head1 NAME
 159
 160
 161
 162 =head1 REVISION
 163
 164 $Id$
 165
 166 =head1 SYNOPSIS
 167
 168  [options] [file [files [...]]]
 169
 170 =head1 DESCRIPTION
 171
 172
 173
 174 =head1 OPTIONS
 175
 176 =over 4
 177
 178 =item B<-h>, B<--help>
 179
 180 Print a brief help summary.
 181
 182 =item B<-v>, B<--verbose>
 183
 184 Increase level of verbosity. Can be repeated.
 185
 186 =item B<--version>
 187
 188 Print version information.
 189
 190 =item B<--debug>
 191
 192 Print debugging messages.
 193
 194 =back
 195
 196 =head1 BUGS
 197
 198
 199
 200 =head1 AUTHOR
 201
 202 Made by Øyvind A. Holm S<E<lt>sunny@sunbase.orgE<gt>>.
 203
 204 =head1 COPYRIGHT
 205
 206 Copyleft © Øyvind A. Holm E<lt>sunny@sunbase.orgE<gt>
 207 This is free software; see the file F<COPYING> for legalese stuff.
 208
 209 =head1 LICENCE
 210
 211 This program is free software; you can redistribute it and/or modify it
 212 under the terms of the GNU General Public License as published by the
 213 Free Software Foundation; either version 2 of the License, or (at your
 214 option) any later version.
 215
 216 This program is distributed in the hope that it will be useful, but
 217 WITHOUT ANY WARRANTY; without even the implied warranty of
 218 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 219 See the GNU General Public License for more details.
 220
 221 You should have received a copy of the GNU General Public License along
 222 with this program; if not, write to the Free Software Foundation, Inc.,
 223 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 224
 225 =head1 SEE ALSO
 226
 227 =cut
 228
 229 # }}}
 230
 231 # vim: set fenc=UTF-8 ft=perl fdm=marker ts=4 sw=4 sts=4 et fo+=w :
 232 # End of file $Id$