/usr/share/doc/libplplot12/examples/d/x11d.d is in libplplot-dev 5.10.0+dfsg-1.
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//
//
// Mesh plot demo.
//
// Copyright (C) 2008 Werner Smekal
// Copyright (C) 2004 Rafael Laboissiere
//
// 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; either version 2 of the License, or
// (at your option) any later version.
//
// 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 So ftware
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
import plplot;
import std.string;
import std.math;
void cmap1_init()
{
PLFLT[2] i, h, l, s;
i[] = [ 0.0, 1.0 ]; // boundaries
h[] = [ 240.0, 0.0 ]; // blue -> green -> yellow -> red
l[] = [ 0.6, 0.6 ];
s[] = [ 0.8, 0.8 ];
plscmap1n( 256 );
c_plscmap1l( 0, 2, cast(PLFLT*) i, cast(PLFLT*) h, cast(PLFLT*) l,
cast(PLFLT*) s, null );
}
//--------------------------------------------------------------------------
// main
//
// Does a series of mesh plots for a given data set, with different
// viewing options in each plot.
//--------------------------------------------------------------------------
int main( char[][] args )
{
const nlevel = 10;
const XPTS = 35; // Data points in x
const YPTS = 46; // Data points in y
int[] opt = [ DRAW_LINEXY, DRAW_LINEXY ];
PLFLT[] alt = [ 33.0, 17.0 ];
PLFLT[] az = [ 24.0, 115.0 ];
string title[] = [ "#frPLplot Example 11 - Alt=33, Az=24, Opt=3",
"#frPLplot Example 11 - Alt=17, Az=115, Opt=3" ];
PLFLT xx, yy;
// Parse and process command line arguments
plparseopts( args, PL_PARSE_FULL );
// Initialize plplot
plinit();
PLFLT[XPTS] x;
PLFLT[YPTS] y;
PLFLT[][] z = new PLFLT[][XPTS];
for ( int i = 0; i < XPTS; i++ )
z[i] = new PLFLT[YPTS];
for ( int i = 0; i < XPTS; i++ )
x[i] = 3. * cast(PLFLT) ( i - ( XPTS / 2 ) ) / cast(PLFLT) ( XPTS / 2 );
for ( int i = 0; i < YPTS; i++ )
y[i] = 3. * cast(PLFLT) ( i - ( YPTS / 2 ) ) / cast(PLFLT) ( YPTS / 2 );
for ( size_t i = 0; i < XPTS; i++ )
{
xx = x[i];
for ( size_t j = 0; j < YPTS; j++ )
{
yy = y[j];
z[i][j] = 3. * ( 1. - xx ) * ( 1. - xx ) * exp( -( xx * xx ) - ( yy + 1. ) * ( yy + 1. ) ) -
10. * ( xx / 5. - pow( xx, 3. ) - pow( yy, 5. ) ) * exp( -xx * xx - yy * yy ) -
1. / 3. * exp( -( xx + 1 ) * ( xx + 1 ) - ( yy * yy ) );
if ( 0 ) // Jungfraujoch/Interlaken
{
if ( z[i][j] < -1. )
z[i][j] = -1.;
}
}
}
PLFLT zmin, zmax;
f2mnmx( z, zmin, zmax );
PLFLT step = ( zmax - zmin ) / ( nlevel + 1 );
PLFLT[nlevel] clevel;
for ( size_t i = 0; i < nlevel; i++ )
clevel[i] = zmin + step + step * i;
cmap1_init();
for ( size_t k = 0; k < 2; k++ )
{
for ( size_t i = 0; i < 4; i++ )
{
pladv( 0 );
plcol0( 1 );
plvpor( 0.0, 1.0, 0.0, 0.9 );
plwind( -1.0, 1.0, -1.0, 1.5 );
plw3d( 1.0, 1.0, 1.2, -3.0, 3.0, -3.0, 3.0, zmin, zmax, alt[k], az[k] );
plbox3( "bnstu", "x axis", 0.0, 0,
"bnstu", "y axis", 0.0, 0,
"bcdmnstuv", "z axis", 0.0, 4 );
plcol0( 2 );
switch ( i )
{
case 0:
// wireframe plot
plmesh( x, y, z, opt[k] );
break;
case 1:
// magnitude colored wireframe plot
plmesh( x, y, z, opt[k] | MAG_COLOR );
break;
case 2:
// magnitude colored wireframe plot with sides
plot3d( x, y, z, opt[k] | MAG_COLOR, 1 );
break;
case 3:
// magnitude colored wireframe plot with base contour
plmeshc( x, y, z, opt[k] | MAG_COLOR | BASE_CONT, clevel );
break;
default:
break;
}
plcol0( 3 );
plmtex( "t", 1.0, 0.5, 0.5, title[k] );
}
}
plend();
return 0;
}
//--------------------------------------------------------------------------
// f2mnmx
//
// Returns min & max of input 2d array.
//--------------------------------------------------------------------------
void f2mnmx( PLFLT[][] f, out PLFLT fmn, out PLFLT fmx )
{
fmx = f[0][0];
fmn = fmx;
for ( int i = 0; i < f.length; i++ )
{
for ( int j = 0; j < f[i].length; j++ )
{
fmx = fmax( fmx, f[i][j] );
fmn = fmin( fmn, f[i][j] );
}
}
}
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