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//---------------------------------------------------------------------------//
// $Id: x15.cc,v 1.6 2004/06/24 08:08:53 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 15 in C++.
//---------------------------------------------------------------------------//
#include "plstream.h"
#include <iostream>
#include <cmath>
#ifdef USE_NAMESPACE
using namespace std;
#endif
class x15 {
public:
x15(int, char **);
void plot1( PLFLT **, PLFLT, PLFLT);
void plot2( PLFLT **, PLFLT, PLFLT);
private:
// Class data
plstream *pls;
const static int XPTS;
const static int YPTS;
// calculated constants and array that depends on them
const static PLFLT XSPA;
const static PLFLT YSPA;
const static PLFLT tr[];
};
const int x15::XPTS = 35;
const int x15::YPTS = 46;
// calculated constants and array that depends on them
const PLFLT x15::XSPA = 2./(XPTS-1);
const PLFLT x15::YSPA = 2./(YPTS-1);
const PLFLT x15::tr[] = {XSPA, 0.0, -1.0, 0.0, YSPA, -1.0};
x15::x15( int argc, char ** argv ) {
int i, j;
PLFLT xx;
PLFLT yy;
PLFLT x;
PLFLT y;
PLFLT **z;
PLFLT zmin, zmax;
// plplot initialization
pls = new plstream();
// Parse and process command line arguments.
pls->ParseOpts( &argc, argv, PL_PARSE_FULL );
// Initialize PLplot.
pls->init();
// no need to fiddle with color maps since example uses default cmap0
// and the cmap1 fiddling that x15c.c does is completely irrelevant
// (although interesting).
pls->Alloc2dGrid(&z,XPTS,YPTS);
for( i = 0; i < XPTS; i++ ) {
xx = (PLFLT) (i - (XPTS/2)) / (PLFLT) (XPTS/2);
for( j = 0; j < YPTS; j++ )
{
yy = ((PLFLT) (j - (YPTS/2)) / (PLFLT) (YPTS/2)) - 1.;
z[i][j] = xx*xx - yy*yy + (xx - yy)/(xx*xx+yy*yy + 0.1);
x = tr[0] * i + tr[1] * j + tr[2];
y = tr[3] * i + tr[4] * j + tr[5];
}
}
pls->MinMax2dGrid(z,XPTS,YPTS,&zmax,&zmin);
plot1( z, zmin, zmax );
plot2( z, zmin, zmax );
//pls->end();
// Tidy up allocated grids
pls->Free2dGrid(z,XPTS,YPTS);
delete pls;
}
// Illustrates a single shaded region.
void x15::plot1( PLFLT **z, PLFLT zmin, PLFLT zmax) {
PLFLT shade_min, shade_max, sh_color;
int sh_cmap = 0, sh_width;
int min_color = 0, min_width = 0, max_color = 0, max_width = 0;
pls->adv(0);
pls->vpor(0.1, 0.9, 0.1, 0.9);
pls->wind(-1.0, 1.0, -1.0, 1.0);
/* Plot using identity transform */
shade_min = zmin + (zmax-zmin)*0.4;
shade_max = zmin + (zmax-zmin)*0.6;
sh_color = 7;
sh_width = 2;
min_color = 9;
max_color = 2;
min_width = 2;
max_width = 2;
pls->psty(8);
pls->shade( z, XPTS, YPTS, NULL, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
plstream::fill, 1, NULL, NULL );
pls->col0(1);
pls->box("bcnst", 0.0, 0, "bcnstv", 0.0, 0);
pls->col0(2);
pls->lab("distance", "altitude", "Bogon flux");
}
// Illustrates multiple adjacent shaded regions, using different fill
// patterns for each region.
void x15::plot2(PLFLT **z, PLFLT zmin, PLFLT zmax)
{
PLFLT shade_min, shade_max, sh_color;
int sh_cmap = 0, sh_width;
int min_color = 0, min_width = 0, max_color = 0, max_width = 0;
int i;
sh_width = 2;
pls->adv(0);
pls->vpor(0.1, 0.9, 0.1, 0.9);
pls->wind(-1.0, 1.0, -1.0, 1.0);
/* Plot using identity transform */
for (i = 0; i < 10; i++) {
shade_min = zmin + (zmax - zmin) * i / 10.0;
shade_max = zmin + (zmax - zmin) * (i +1) / 10.0;
sh_color = i+6;
pls->psty((i + 2) % 8 + 1);
pls->shade( z, XPTS, YPTS, NULL, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
plstream::fill, 1, NULL, NULL );
}
pls->col0(1);
pls->box("bcnst", 0.0, 0, "bcnstv", 0.0, 0);
pls->col0(2);
pls->lab("distance", "altitude", "Bogon flux");
}
int main( int argc, char ** argv ) {
x15 *x = new x15( argc, argv );
delete x;
}
//---------------------------------------------------------------------------//
// End of x15.cc
//---------------------------------------------------------------------------//
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