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#! /usr/bin/env perl
#
# Demo x18 for PLplot PDL bindings
#
# 3-d line and point plot demo.
#
# Copyright (C) 2004 Rafael Laboissiere
#
# This file is part of PLplot.
#
# PLplot is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Library 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
use PDL;
use PDL::Graphics::PLplot;
use Math::Trig qw [pi];
my @opt = (1, 0, 1, 0);
my @alt = (20.0, 35.0, 50.0, 65.0);
my @az = (30.0, 40.0, 50.0, 60.0);
sub test_poly {
my $k = shift;
my $draw = pdl ([ 1, 1, 1, 1 ],
[ 1, 0, 1, 0 ],
[ 0, 1, 0, 1 ],
[ 1, 1, 0, 0 ]);
my $two_pi = 2 * pi;
pladv (0);
plvpor (0.0, 1.0, 0.0, 0.9);
plwind (-1.0, 1.0, -0.9, 1.1);
plcol0 (1);
plw3d (1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, $alt[$k], $az[$k]);
plbox3 (0.0, 0, 0.0, 0, 0.0, 0,
"bnstu", "x axis", "bnstu", "y axis", "bcdmnstuv", "z axis");
plcol0 (2);
# x = r sin(phi) cos(theta)
# y = r sin(phi) sin(theta)
# z = r cos(phi)
# r = 1 :=)
print $draw[0];
for (my $i = 0; $i < 20; $i++ ) {
my $theta = $two_pi * ($i + pdl [0, 0, 1, 1, 0]) / 20.;
for (my $j = 0; $j < 20; $j++ ) {
my $phi = pi * ($j + pdl [0, 1, 1, 0, 0]) / 20.1;
my $x = sin ($phi) * cos ($theta);
my $y = sin ($phi) * sin ($theta);
my $z = cos ($phi);
plpoly3 ($x, $y, $z, $draw->slice(",$k")->squeeze, 1);
}
}
plcol0 (3);
plmtex (1.0, 0.5, 0.5, "t", "unit radius sphere");
}
#--------------------------------------------------------------------------
# main
# Does a series of 3-d plots for a given data set, with different
# viewing options in each plot.
#--------------------------------------------------------------------------
use constant NPTS => 1000;
# Parse and process command line arguments
plParseOpts (\@ARGV, PL_PARSE_SKIP | PL_PARSE_NOPROGRAM);
# Initialize plplot
plinit ();
for (my $k = 0; $k < 4; $k++) {
test_poly ($k);
}
# From the mind of a sick and twisted physicist...
my $i = sequence (NPTS);
my $z = -1. + 2. * $i / NPTS;
# Pick one ...
my $r = $z;
my $x = $r * cos (2 * pi * 6 * $i / NPTS);
my $y = $r * sin (2 * pi * 6 * $i / NPTS );
for ($k = 0; $k < 4; $k++) {
pladv (0);
plvpor (0.0, 1.0, 0.0, 0.9);
plwind (-1.0, 1.0, -0.9, 1.1);
plcol0 (1);
plw3d (1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, $alt[$k], $az[$k]);
plbox3 (0.0, 0, 0.0, 0, 0.0, 0,
"bnstu", "x axis", "bnstu", "y axis", "bcdmnstuv", "z axis");
plcol0 (2);
if ($opt[$k]) {
plline3 ($x, $y, $z);
} else {
plpoin3 ($x, $y, $z, 1);
}
plcol0 (3);
$title = sprintf ("#frPLplot Example 18 - Alt=%.0f, Az=%.0f",
$alt[$k], $az[$k]);
plmtex (1.0, 0.5, 0.5, "t", title);
}
plend ();
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