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# Demo x11 for the PLplot PDL binding
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# Copyright (C) 2004 Rafael Laboissiere
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# This file is part of PLplot.
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# PLplot is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Library General Public License as published
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# by the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# PLplot is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Library General Public License for more details.
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# You should have received a copy of the GNU Library General Public License
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# along with PLplot; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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use PDL::Graphics::PLplot;
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use constant XPTS => 35; # Data points in x
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use constant YPTS => 46; # Data points in y
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use constant LEVELS => 10;
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@opt = (DRAW_LINEXY, DRAW_LINEXY);
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"#frPLplot Example 11 - Alt=33, Az=24, Opt=3",
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"#frPLplot Example 11 - Alt=17, Az=115, Opt=3"
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my $i = pdl [0.0, # left boundary
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1.0]; # right boundary
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my $h = pdl [240, # blue -> green -> yellow ->
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my $l = pdl [0.6, 0.6];
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my $s = pdl [0.8, 0.8];
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plscmap1l(0, $i, $h, $l, $s, pdl ([]));
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# Does a series of mesh plots for a given data set, with different
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# viewing options in each plot.
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# Parse and process command line arguments
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plParseOpts (\@ARGV, PL_PARSE_SKIP | PL_PARSE_NOPROGRAM);
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$z = zeroes (XPTS, YPTS);
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my $x = 3 * (sequence (XPTS) - int(XPTS / 2)) / int(XPTS / 2);
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my $y = 3 * (sequence (YPTS) - int(YPTS / 2)) / int(YPTS / 2);
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# The code below may be vectorized to improve speed
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for (my $i = 0; $i < XPTS; $i++) {
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my $xx = $x->index ($i);
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for (my $j = 0; $j < YPTS; $j++) {
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my $yy = $y->index ($j);
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$z->slice ("$i,$j") .=
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3. * (1.-$xx)*(1.-$xx) * exp(-($xx*$xx) - ($yy+1.)*($yy+1.)) -
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10. * ($xx/5. - pow($xx,3.) - pow($yy,5.)) * exp(-$xx*$xx-$yy*$yy) -
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1./3. * exp(-($xx+1)*($xx+1) - ($yy*$yy));
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$step = ($zmax - $zmin) / ($nlevel + 1);
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$clevel = $zmin + $step + $step * sequence ($nlevel);
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for (my $k = 0; $k < 2; $k++) {
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for (my $i = 0; $i < 4; $i++) {
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plvpor (0.0, 1.0, 0.0, 0.9);
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plwind (-1.0, 1.0, -1.0, 1.5);
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plw3d (1.0, 1.0, 1.2, -3.0, 3.0, -3.0, 3.0, $zmin, $zmax,
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plbox3 (0.0, 0, 0.0, 0, 0.0, 4,
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"bnstu", "x axis", "bnstu", "y axis", "bcdmnstuv", "z axis");
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plmesh ($x, $y, $z, $opt[$k])
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# magnitude colored wireframe plot
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plmesh ($x, $y, $z,$opt[$k] | MAG_COLOR);
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# magnitude colored wireframe plot with sides
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plot3d ($x, $y, $z, $opt[$k] | MAG_COLOR, 1);
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# magnitude colored wireframe plot with base contour
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plmeshc ($x, $y, $z, $opt[$k] | MAG_COLOR | BASE_CONT, $clevel);
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plmtex (1.0, 0.5, 0.5, "t", $title[$k]);