/usr/share/doc/libplplot12/examples/d/x15d.d is in libplplot-dev 5.10.0+dfsg2-0.1ubuntu2.
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//
// Shade plot demo.
//
// Maurice LeBrun
// IFS, University of Texas at Austin
// 31 Aug 1993
//
import std.math;
import std.stdio;
import std.string;
import plplot;
//--------------------------------------------------------------------------
// main
//
// Does a variety of shade plots.
//--------------------------------------------------------------------------
int main( char[][] args )
{
const int XPTS = 35; // Data points in x
const int YPTS = 46; // Data points in y
// Parse and process command line arguments
plparseopts( args, PL_PARSE_FULL );
// Set up color map 0
// plscmap0n(3);
// create plot object
plot myPlot = new plot;
// Set up color map 1
myPlot.cmap1_init2();
// Initialize plplot
plinit();
// Set up data array
PLFLT xx, yy;
PLFLT[][] z = new PLFLT[][XPTS];
for ( int i = 0; i < XPTS; i++ )
z[i] = new PLFLT[YPTS];
for ( int i = 0; i < XPTS; i++ )
{
xx = cast(double) ( i - ( XPTS / 2 ) ) / ( XPTS / 2 );
for ( int j = 0; j < YPTS; j++ )
{
yy = cast(double) ( j - ( YPTS / 2 ) ) / ( YPTS / 2 ) - 1.0;
z[i][j] = xx * xx - yy * yy + ( xx - yy ) / ( xx * xx + yy * yy + 0.1 );
}
}
// Plot using identity transform
myPlot.plot1( z );
myPlot.plot2( z );
myPlot.plot3();
plend();
return 0;
}
class plot {
//--------------------------------------------------------------------------
// cmap1_init1
//
// Initializes color map 1 in HLS space.
//--------------------------------------------------------------------------
public void cmap1_init1()
{
PLFLT[] i = [ 0.0, 0.45, 0.55, 1.0 ]; // left boundary, just before center,
// just after center, right boundary
PLFLT[] h = [ 260.0, 260.0, 20.0, 20.0 ]; // hue -- low: blue-violet, only change as we go over vertex
// hue -- high: red, keep fixed
PLFLT[] l = [ 0.5, 0.0, 0.0, 0.5 ]; // lightness -- low, lightness -- center
// lightness -- center, lightness -- high
PLFLT[] s = [ 1.0, 1.0, 1.0, 1.0 ]; // maximum saturation
plscmap1l( 0, i, h, l, s );
}
//--------------------------------------------------------------------------
// cmap1_init2
//
// Initializes color map 1 in HLS space.
//--------------------------------------------------------------------------
public void cmap1_init2()
{
PLFLT[] i = [ 0.0, 0.45, 0.55, 1.0 ]; // left boundary, just before center,
// just after center, right boundary
PLFLT[] h = [ 260.0, 260.0, 20.0, 20.0 ]; // hue -- low: blue-violet, only change as we go over vertex
// hue -- high: red, keep fixed
PLFLT[] l = [ 0.6, 0.0, 0.0, 0.6 ]; // lightness -- low, lightness -- center
// lightness -- center, lightness -- high
PLFLT[] s = [ 1.0, 0.5, 0.5, 1.0 ]; // saturation -- low, saturation -- center
// saturation -- center, saturation -- high
plscmap1l( 0, i, h, l, s );
}
//--------------------------------------------------------------------------
// plot1
//
// Illustrates a single shaded region.
//--------------------------------------------------------------------------
public void plot1( PLFLT[][] z )
{
pladv( 0 );
plvpor( 0.1, 0.9, 0.1, 0.9 );
plwind( -1.0, 1.0, -1.0, 1.0 );
PLFLT zmin, zmax;
f2mnmx( z, zmin, zmax );
PLFLT shade_min = zmin + ( zmax - zmin ) * 0.4;
PLFLT shade_max = zmin + ( zmax - zmin ) * 0.6;
PLFLT sh_color = 7;
PLFLT sh_width = 2.;
PLINT sh_cmap = 0;
PLINT min_color = 9;
PLINT max_color = 2;
PLFLT min_width = 2.;
PLFLT max_width = 2.;
plpsty( 8 );
plshade( z, null, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width, 1 );
plcol0( 1 );
plbox( "bcnst", 0.0, 0, "bcnstv", 0.0, 0 );
plcol0( 2 );
pllab( "distance", "altitude", "Bogon flux" );
}
//--------------------------------------------------------------------------
// plot2
//
// Illustrates multiple adjacent shaded regions, using different fill
// patterns for each region.
//--------------------------------------------------------------------------
public void plot2( PLFLT[][] z )
{
static PLINT nlin[10] = [ 1, 1, 1, 1, 1, 2, 2, 2, 2, 2 ];
static PLINT inc[10][2] = [ [450, 0], [-450, 0], [0, 0], [900, 0], [300, 0],
[450, -450], [0, 900], [0, 450], [450, -450], [0, 900] ];
static PLINT del[10][2] = [ [2000, 2000], [2000, 2000], [2000, 2000],
[2000, 2000], [2000, 2000], [2000, 2000],
[2000, 2000], [2000, 2000], [4000, 4000],
[4000, 2000] ];
PLINT sh_cmap = 0, sh_width = 2;
PLINT min_color = 0, min_width = 0, max_color = 0, max_width = 0;
pladv( 0 );
plvpor( 0.1, 0.9, 0.1, 0.9 );
plwind( -1.0, 1.0, -1.0, 1.0 );
PLFLT zmin, zmax;
f2mnmx( z, zmin, zmax );
// Plot using identity transform
for ( int i = 0; i < 10; i++ )
{
PLFLT shade_min = zmin + ( zmax - zmin ) * i / 10.0;
PLFLT shade_max = zmin + ( zmax - zmin ) * ( i + 1 ) / 10.0;
PLFLT sh_color = i + 6;
plpat( inc[i][0..nlin[i]], del[i][0..nlin[i]] );
plshade( z, null, -1., 1., -1., 1.,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width, 1 );
}
plcol0( 1 );
plbox( "bcnst", 0.0, 0, "bcnstv", 0.0, 0 );
plcol0( 2 );
pllab( "distance", "altitude", "Bogon flux" );
}
//--------------------------------------------------------------------------
// plot3
//
// Illustrates shaded regions in 3d, using a different fill pattern for
// each region.
//--------------------------------------------------------------------------
public void plot3()
{
static PLFLT xx[2][5] = [ [-1.0, 1.0, 1.0, -1.0, -1.0],
[-1.0, 1.0, 1.0, -1.0, -1.0] ];
static PLFLT yy[2][5] = [ [1.0, 1.0, 0.0, 0.0, 1.0],
[-1.0, -1.0, 0.0, 0.0, -1.0] ];
static PLFLT zz[2][5] = [ [0.0, 0.0, 1.0, 1.0, 0.0],
[0.0, 0.0, 1.0, 1.0, 0.0] ];
pladv( 0 );
plvpor( 0.1, 0.9, 0.1, 0.9 );
plwind( -1.0, 1.0, -1.0, 1.0 );
plw3d( 1., 1., 1., -1.0, 1.0, -1.0, 1.0, 0.0, 1.5, 30, -40 );
// Plot using identity transform
plcol0( 1 );
plbox3( "bntu", "X", 0.0, 0, "bntu", "Y", 0.0, 0, "bcdfntu", "Z", 0.5, 0 );
plcol0( 2 );
pllab( "", "", "3-d polygon filling" );
plcol0( 3 );
plpsty( 1 );
plline3( xx[0], yy[0], zz[0] );
plfill3( xx[0][0..4], yy[0][0..4], zz[0][0..4] );
plpsty( 2 );
plline3( xx[1], yy[1], zz[1] );
plfill3( xx[1][0..4], yy[1][0..4], zz[1][0..4] );
}
//--------------------------------------------------------------------------
// f2mnmx
//
// Returns min & max of input 2d array.
//--------------------------------------------------------------------------
public 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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