static void Main( string[] args )
{
const int size = 1000;
var blocks = new Grid<bool>( new Size( size, size ) );
blocks.SetEach( () => RandomHelper.Random.NextDouble() < 0.4 );
var line = new Line( new Point( 0, 0 ), new Point( size - 1, size - 1 ) );
var points = line.DrunkenWalk( 0.25, blocks.Bounds ).Distinct();
var pointsHash = new HashSet<IPoint>( points );
blocks.SetEach( ( value, point ) => pointsHash.Contains( point ) ? false : value );
var flood = blocks.FloodFill( new Point( 0, 0 ) );
var fill = new Grid<bool>( new Size( size, size ) );
foreach( var point in flood ) {
fill[ point ] = true;
}
File.WriteAllText( "blocks.pbm", blocks.ToPbm() );
File.WriteAllText( "fill.pbm", fill.ToPbm() );
}