/usr/share/doc/libplplot12/examples/perl/x02.pl is in libplplot-dev 5.10.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #! /usr/bin/env perl
#
# Demo x02 for the PLplot PDL binding
#
# Multiple window and color map 0 demo
# (inspired from t/x02.t of module Graphics::PLplot, by Tim Jenness)
#
# Copyright (C) 2004 Rafael Laboissiere
# 2008 Doug Hunt -- Added working, more PDL-ish demo2
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published
# by the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PLplot is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with PLplot; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
use PDL;
use PDL::Graphics::PLplot;
sub main {
# Parse and process command line arguments
plParseOpts (\@ARGV, PL_PARSE_SKIP | PL_PARSE_NOPROGRAM);
# Initialise plplot
plinit ();
# Run demos
demo1();
demo2();
plend();
}
#--------------------------------------------------------------------------
# demo1
#
# Demonstrates multiple windows and default color map 0 palette.
#--------------------------------------------------------------------------
sub demo1 {
plbop();
# Divide screen into 16 regions
plssub(4, 4);
draw_windows( 16, 0 );
pleop();
}
#--------------------------------------------------------------------------
# demo2
#
# Demonstrates multiple windows, user-modified color map 0 palette, and
# HLS -> RGB translation.
#--------------------------------------------------------------------------
sub demo2 {
# Set up cmap0
# Use 100 custom colors in addition to base 16
# Min & max lightness values
my $lmin = 0.15;
my $lmax = 0.85;
plbop();
# Divide screen into 100 regions
plssub(10, 10);
my $basemap = sequence(16);
my $custmap = sequence(100);
my ($r, $g, $b) = plgcol0($basemap);
my $h = (360/10) * ($custmap % 10);
my $s = ones(100);
my $l = $lmin + ($lmax - $lmin) * ($custmap / 10)->floor / 9;
my ($r1, $g1, $b1) = plhlsrgb($h, $l, $s);
$r = $r->append($r1*255.001);
$g = $g->append($g1*255.001);
$b = $b->append($b1*255.001);
#for ($i = 0; $i < 116; $i++) {
# printf("%3.0f %3.0f %3.0f %3.0f \n", $i, $r->at($i), $g->at($i), $b->at($i));
#}
# Now set cmap0 all at once (faster, since fewer driver calls)
plscmap0($r, $g, $b);
draw_windows( 100, 16 );
pleop();
}
#--------------------------------------------------------------------------
# draw_windows
#
# Draws a set of numbered boxes with colors according to cmap0 entry.
#--------------------------------------------------------------------------
sub draw_windows
{
my ($nw, $cmap_offset) = @_;
plschr(0.0, 3.5);
plfont(4);
for (my $i = 0; $i < $nw; $i++) {
plcol0($i+$cmap_offset);
my $text = $i;
pladv(0);
my $vmin = 0.1;
my $vmax = 0.9;
for (my $j = 0; $j <= 2; $j++) {
plwidth($j + 1);
plvpor($vmin, $vmax, $vmin, $vmax);
plwind(0.0, 1.0, 0.0, 1.0);
plbox(0,0,0,0,"bc","bc");
$vmin += 0.1;
$vmax -= 0.1;
}
plwidth(1);
plptex(0.5, 0.5, 1.0, 0.0, 0.5, $text);
}
}
main();
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