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// Filling and clipping polygons.
//
import plplot;
import std.string;
//--------------------------------------------------------------------------
// main
//
// Test program for filling polygons and proper clipping
//--------------------------------------------------------------------------
int main( char[][] args )
{
// Parse and process command line arguments
plparseopts( args, PL_PARSE_FULL );
// Initialize plplot
plssub( 3, 3 );
plinit();
static PLFLT[2][9] xextreme = [ [-120.0, 120.0],
[-120.0, 120.0],
[-120.0, 120.0],
[ -80.0, 80.0],
[-220.0, -120.0],
[ -20.0, 20.0],
[ -20.0, 20.0],
[ -80.0, 80.0],
[ 20.0, 120.0] ];
static PLFLT[2][9] yextreme = [ [-120.0, 120.0],
[ 20.0, 120.0],
[ -20.0, 120.0],
[ -20.0, 120.0],
[-120.0, 120.0],
[-120.0, 120.0],
[ -20.0, 20.0],
[ -80.0, 80.0],
[-120.0, 120.0] ];
PLFLT[] x0, y0;
for ( int k = 0; k < 2; k++ )
{
for ( int j = 0; j < 4; j++ )
{
switch ( j )
{
case 0:
x0.length = 4;
y0.length = 4;
// Polygon 1: a diamond
x0[] = [ 0.0, -100.0, 0.0, 100.0 ];
y0[] = [-100.0, 0.0, 100.0, 0.0 ];
break;
case 1:
// Polygon 1: a diamond - reverse direction
x0[] = [ 100.0, 0.0, -100.0, 0.0 ];
y0[] = [ 0.0, 100.0, 0.0, -100.0 ];
break;
case 2:
// Polygon 2: a square with punctures
x0.length = 10;
y0.length = 10;
x0[] = [ -100.0, -100.0, 80.0, -100.0, -100.0, -80.0, 0.0, 80.0, 100.0, 100.0 ];
y0[] = [ -100.0, -80.0, 0.0, 80.0, 100.0, 100.0, 80.0, 100.0, 100.0, -100.0 ];
break;
case 3:
// Polygon 2: a square with punctures - reversed direction
x0[] = [ 100.0, 100.0, 80.0, 0.0, -80.0, -100.0, -100.0, 80.0, -100.0, -100.0 ];
y0[] = [ -100.0, 100.0, 100.0, 80.0, 100.0, 100.0, 80.0, 0.0, -80.0, -100.0 ];
break;
default:
break;
}
for ( int i = 0; i < 9; i++ )
{
pladv( 0 );
plvsta();
plwind( xextreme[i][0], xextreme[i][1], yextreme[i][0], yextreme[i][1] );
plcol0( 2 );
plbox( "bc", 1.0, 0, "bcnv", 10.0, 0 );
plcol0( 1 );
plpsty( 0 );
if ( k == 0 )
plfill( x0, y0 );
else
plgradient( x0, y0, 45. );
plcol0( 2 );
pllsty( 1 );
plline( x0, y0 );
}
}
}
// Don't forget to call plend() to finish off!
plend();
return 0;
}
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