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//---------------------------------------------------------------------------//
// $Id: x03.cc,v 1.5 2004/03/03 17:41:16 andrewross Exp $
//---------------------------------------------------------------------------//
//
//---------------------------------------------------------------------------//
// Copyright (C) 2004 Andrew Ross <andrewr@coriolis.greenend.org.uk>
// Copyright (C) 2004 Alan W. Irwin
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//---------------------------------------------------------------------------//
//
//---------------------------------------------------------------------------//
// Implementation of PLplot example 3 in C++.
//---------------------------------------------------------------------------//
#include "plstream.h"
#include <iostream>
#include <cmath>
#ifdef USE_NAMESPACE
using namespace std;
#endif
class x03 {
public:
x03(int, char **);
private:
// Class data
plstream *pls;
};
x03::x03( int argc, char ** argv ) {
int i, j;
char text[4];
PLFLT dtr, theta, dx, dy, r;
PLFLT *x0 = new PLFLT[361];
PLFLT *y0 = new PLFLT[361];
PLFLT *x = new PLFLT[361];
PLFLT *y = new PLFLT[361];
dtr = M_PI / 180.0;
for( i = 0; i <= 360; i++ )
{
x0[i] = cos(dtr * i);
y0[i] = sin(dtr * i);
}
// plplot initialization
pls = new plstream();
// Parse and process command line arguments.
pls->ParseOpts( &argc, argv, PL_PARSE_FULL );
// 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++) {
for (j = 0; j <= 360; j++) {
x[j] = 0.1 * i * x0[j];
y[j] = 0.1 * i * y0[j];
}
// Draw circles for polar grid.
pls->line(361, x, y);
}
pls->col0(2);
for (i = 0; i <= 11; i++) {
theta = 30.0 * i;
dx = cos(dtr * theta);
dy = sin(dtr * theta);
// Draw radial spokes for polar grid.
pls->join(0.0, 0.0, dx, dy);
sprintf(text, "%d", (int)rint(theta));
// Write labels for angle.
//Slightly off zero to avoid floating point logic flips at 90 and 270 deg.
if (dx >= -0.00001)
pls->ptex(dx, dy, dx, dy, -0.15, text);
else
pls->ptex(dx, dy, -dx, -dy, 1.15, text);
}
// Draw the graph.
for (i = 0; i <= 360; i++) {
r = sin(dtr * (5 * i));
x[i] = x0[i] * r;
y[i] = y0[i] * r;
}
pls->col0(3);
pls->line(361, 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();
delete[] x;
delete[] y;
delete[] x0;
delete[] y0;
delete pls;
}
int main( int argc, char ** argv ) {
x03 *x = new x03( argc, argv );
delete x;
}
//---------------------------------------------------------------------------//
// End of x03.cc
//---------------------------------------------------------------------------//
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