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// $Id: x15.java 12329 2013-05-02 22:44:50Z airwin $
//--------------------------------------------------------------------------
//--------------------------------------------------------------------------
// Copyright (C) 2001, 2002 Geoffrey Furnish
// Copyright (C) 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 15 in Java.
//--------------------------------------------------------------------------
package plplot.examples;
import plplot.core.*;
import static plplot.core.plplotjavacConstants.*;
class x15 {
static final int XPTS = 35;
static final int YPTS = 46;
// calculated constants and array that depends on them
static final double XSPA = 2. / ( XPTS - 1 );
static final double YSPA = 2. / ( YPTS - 1 );
final double tr[] = { XSPA, 0.0, -1.0, 0.0, YSPA, -1.0 };
PLStream pls = new PLStream();
double fmin, fmax;
// Compute min and max value of a 2-d array.
void f2mnmx( double[][] f, int nx, int ny )
{
fmax = f[0][0];
fmin = fmax;
for ( int i = 0; i < nx; i++ )
for ( int j = 0; j < ny; j++ )
{
if ( f[i][j] < fmin ) fmin = f[i][j];
if ( f[i][j] > fmax ) fmax = f[i][j];
}
}
// Does a variety of shade plots with discrete colours and patterns.
public static void main( String[] args )
{
new x15( args );
}
public x15( String[] args )
{
int i, j;
double xx;
double yy;
double x;
double y;
double[][] z = new double[XPTS][YPTS];
double zmin, zmax;
double[][] xg0 = new double[XPTS][YPTS];
double[][] yg0 = new double[XPTS][YPTS];
// Parse and process command line arguments.
pls.parseopts( args, PL_PARSE_FULL | PL_PARSE_NOPROGRAM );
// 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).
for ( i = 0; i < XPTS; i++ )
{
xx = (double) ( i - ( XPTS / 2 ) ) / (double) ( XPTS / 2 );
for ( j = 0; j < YPTS; j++ )
{
yy = ( (double) ( j - ( YPTS / 2 ) ) / (double) ( 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];
// Note xg0 ==> yg1 are one-dimensional because of arrangement of
//zeros in the final tr definition above. However, for now
//we are using raw interface here so must nominally treat them
//as two-dimensional.
xg0[i][j] = x;
yg0[i][j] = y;
}
}
f2mnmx( z, XPTS, YPTS );
zmin = fmin;
zmax = fmax;
plot1( xg0, yg0, z, zmin, zmax );
plot2( xg0, yg0, z, zmin, zmax );
plot3();
pls.end();
}
// Illustrates a single shaded region.
void plot1( double[][] xg0, double[][] yg0, double[][] z, double zmin, double zmax )
{
double shade_min, shade_max, sh_color;
int sh_cmap = 0;
int min_color = 0, max_color = 0;
double sh_width, min_width = 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, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
true, xg0, yg0 );
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 plot2( double[][] xg0, double[][] yg0, double[][] z, double zmin, double zmax )
{
double shade_min, shade_max, sh_color;
int sh_cmap = 0;
int min_color = 0, max_color = 0;
double sh_width, min_width = 0., max_width = 0.;
int i;
int[][] inc = { { 450 }, { -450 }, { 0 }, { 900 }, { 300 },
{450, -450 }, { 0, 900 }, { 0, 450 },
{450, -450 }, { 0, 900 } };
int[][] del = { { 2000 }, { 2000 }, { 2000 }, { 2000 }, { 2000 },
{2000, 2000 }, { 2000, 2000 }, { 2000, 2000 },
{4000, 4000 }, { 4000, 2000 } };
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.pat( inc[i], del[i] );
pls.shade( z, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
true, xg0, yg0 );
}
pls.col0( 1 );
pls.box( "bcnst", 0.0, 0, "bcnstv", 0.0, 0 );
pls.col0( 2 );
pls.lab( "distance", "altitude", "Bogon flux" );
}
// Illustrates shaded regions in 3d, using a different fill pattern for
// each region.
void plot3()
{
double[][] xx = { { -1.0, 1.0, 1.0, -1.0, -1.0 },
{ -1.0, 1.0, 1.0, -1.0, -1.0 } };
double[][] yy = { { 1.0, 1.0, 0.0, 0.0, 1.0 },
{ -1.0, -1.0, 0.0, 0.0, -1.0 } };
double[][] zz = { { 0.0, 0.0, 1.0, 1.0, 0.0 },
{ 0.0, 0.0, 1.0, 1.0, 0.0 } };
pls.adv( 0 );
pls.vpor( 0.1, 0.9, 0.1, 0.9 );
pls.wind( -1.0, 1.0, -1.0, 1.0 );
pls.w3d( 1., 1., 1., -1.0, 1.0, -1.0, 1.0, 0.0, 1.5, 30, -40 );
// Plot using identity transform
pls.col0( 1 );
pls.box3( "bntu", "X", 0.0, 0, "bntu", "Y", 0.0, 0, "bcdfntu", "Z", 0.5, 0 );
pls.col0( 2 );
pls.lab( "", "", "3-d polygon filling" );
pls.col0( 3 );
pls.psty( 1 );
pls.line3( xx[0], yy[0], zz[0] );
pls.fill3( xx[0], yy[0], zz[0] );
pls.psty( 2 );
pls.line3( xx[1], yy[1], zz[1] );
pls.fill3( xx[1], yy[1], zz[1] );
}
}
//--------------------------------------------------------------------------
// End of x15.java
//--------------------------------------------------------------------------
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