/usr/share/doc/libplplot11/examples/c/x02c.c is in libplplot-dev 5.9.9-2ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | // $Id: x02c.c 11289 2010-10-29 20:44:17Z airwin $
//
// Multiple window and color map 0 demo.
//
#include "plcdemos.h"
//--------------------------------------------------------------------------
// main
//
// Demonstrates multiple windows and color map 0 palette, both default and
// user-modified.
//--------------------------------------------------------------------------
void demo1();
void demo2();
void draw_windows( int nw, int cmap0_offset );
int
main( int argc, const char *argv[] )
{
// Parse and process command line arguments
(void) plparseopts( &argc, argv, PL_PARSE_FULL );
// Initialize plplot
plinit();
// Run demos
demo1();
demo2();
plend();
exit( 0 );
}
//--------------------------------------------------------------------------
// demo1
//
// Demonstrates multiple windows and default color map 0 palette.
//--------------------------------------------------------------------------
void demo1()
{
plbop();
// Divide screen into 16 regions
plssub( 4, 4 );
draw_windows( 16, 0 );
pleop();
}
//--------------------------------------------------------------------------
// demo2
//
// Demonstrates multiple windows, user-modified color map 0 palette, and
// HLS -> RGB translation.
//--------------------------------------------------------------------------
void demo2()
{
// Set up cmap0
// Use 100 custom colors in addition to base 16
PLINT r[116], g[116], b[116];
// Min & max lightness values
PLFLT lmin = 0.15, lmax = 0.85;
int i;
plbop();
// Divide screen into 100 regions
plssub( 10, 10 );
for ( i = 0; i <= 99; i++ )
{
PLFLT h, l, s;
PLFLT r1, g1, b1;
// Bounds on HLS, from plhlsrgb() commentary --
// hue [0., 360.] degrees
// lightness [0., 1.] magnitude
// saturation [0., 1.] magnitude
//
// Vary hue uniformly from left to right
h = ( 360. / 10. ) * ( i % 10 );
// Vary lightness uniformly from top to bottom, between min & max
l = lmin + ( lmax - lmin ) * ( i / 10 ) / 9.;
// Use max saturation
s = 1.0;
plhlsrgb( h, l, s, &r1, &g1, &b1 );
//printf("%3d %15.9f %15.9f %15.9f %15.9f %15.9f %15.9f\n",
// i+16,h,l,s,r1,g1,b1);
// Use 255.001 to avoid close truncation decisions in this example.
r[i + 16] = (PLINT) ( r1 * 255.001 );
g[i + 16] = (PLINT) ( g1 * 255.001 );
b[i + 16] = (PLINT) ( b1 * 255.001 );
}
// Load default cmap0 colors into our custom set
for ( i = 0; i <= 15; i++ )
plgcol0( i, &r[i], &g[i], &b[i] );
// for (i = 0; i < 116; i++)
// printf("%3d %3d %3d %3d \n", i, r[i], g[i], b[i]);
// Now set cmap0 all at once (faster, since fewer driver calls)
plscmap0( r, g, b, 116 );
draw_windows( 100, 16 );
pleop();
}
//--------------------------------------------------------------------------
// draw_windows
//
// Draws a set of numbered boxes with colors according to cmap0 entry.
//--------------------------------------------------------------------------
void draw_windows( int nw, int cmap0_offset )
{
int i, j;
PLFLT vmin, vmax;
char text[3];
plschr( 0.0, 3.5 );
plfont( 4 );
for ( i = 0; i < nw; i++ )
{
plcol0( i + cmap0_offset );
sprintf( text, "%d", i );
pladv( 0 );
vmin = 0.1;
vmax = 0.9;
for ( j = 0; j <= 2; j++ )
{
plwid( j + 1 );
plvpor( vmin, vmax, vmin, vmax );
plwind( 0.0, 1.0, 0.0, 1.0 );
plbox( "bc", 0.0, 0, "bc", 0.0, 0 );
vmin = vmin + 0.1;
vmax = vmax - 0.1;
}
plwid( 1 );
plptex( 0.5, 0.5, 1.0, 0.0, 0.5, text );
}
}
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