/usr/share/doc/libplplot12/examples/java/x03.java is in libplplot-java 5.10.0-0ubuntu5.
This file is owned by root:root, with mode 0o644.
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// $Id: x03.java 12240 2012-10-04 22:10:12Z andrewross $
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Copyright (C) 2001 Geoffrey Furnish
// Copyright (C) 2001, 2002 Alan W. Irwin
// Copyright (C) 2004 Andrew Ross
//
// 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; version 2 of the License.
//
// 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
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Implementation of PLplot example 3 in Java.
//--------------------------------------------------------------------------
package plplot.examples;
import plplot.core.*;
import static plplot.core.plplotjavacConstants.*;
import java.lang.Math;
import java.text.*;
class x03 {
public static void main( String[] args )
{
new x03( args );
}
public x03( String[] args )
{
PLStream pls = new PLStream();
NumberFormat nf = NumberFormat.getNumberInstance();
int i;
double dtr, theta, dx, dy, r, offset;
double[] x0 = new double[361];
double[] y0 = new double[361];
double[] x = new double[361];
double[] y = new double[361];
dtr = Math.PI / 180.0;
for ( i = 0; i <= 360; i++ )
{
x0[i] = Math.cos( dtr * i );
y0[i] = Math.sin( dtr * i );
}
// Parse and process command line arguments.
pls.parseopts( args, PL_PARSE_FULL | PL_PARSE_NOPROGRAM );
// Set orientation to portrait - note not all device drivers
// support this, in particular most interactive drivers do not.
pls.sori( 1 );
// Initialize plplot.
pls.init();
// Set up viewport and window, but do not draw box.
pls.env( -1.3, 1.3, -1.3, 1.3, 1, -2 );
for ( i = 1; i <= 10; i++ )
{
pls.arc( 0.0, 0.0, 0.1 * i, 0.1 * i, 0.0, 360.0, 0.0, false );
}
pls.col0( 2 );
for ( i = 0; i <= 11; i++ )
{
theta = 30.0 * i;
dx = Math.cos( dtr * theta );
dy = Math.sin( dtr * theta );
// Draw radial spokes for polar grid.
pls.join( 0.0, 0.0, dx, dy );
String text = nf.format( theta );
// Write labels for angle.
if ( theta < 9.99 )
{
offset = 0.45;
}
else if ( theta < 99.9 )
{
offset = 0.30;
}
else
{
offset = 0.15;
}
//Slightly off zero to avoid floating point logic flips at 90 and 270 deg.
if ( dx >= -0.00001 )
pls.ptex( dx, dy, dx, dy, -offset, text );
else
pls.ptex( dx, dy, -dx, -dy, 1. + offset, text );
}
// Draw the graph.
for ( i = 0; i <= 360; i++ )
{
r = Math.sin( dtr * ( 5 * i ) );
x[i] = x0[i] * r;
y[i] = y0[i] * r;
}
pls.col0( 3 );
pls.line( x, y );
pls.col0( 4 );
pls.mtex( "t", 2.0, 0.5, 0.5, "#frPLplot Example 3 - r(#gh)=sin 5#gh" );
// Close the plot at end.
pls.end();
}
}
//--------------------------------------------------------------------------
// End of x03.java
//--------------------------------------------------------------------------
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