fCraft.MapGeneratorOld.AddBeaches C# (CSharp) Method

        private void AddBeaches( [NotNull] Map map )
        {
            if ( map == null )
                throw new ArgumentNullException( "map" );
            int beachExtentSqr = ( args.BeachExtent + 1 ) * ( args.BeachExtent + 1 );
            for ( int x = 0; x < map.Width; x++ ) {
                for ( int y = 0; y < map.Length; y++ ) {
                    for ( int z = args.WaterLevel; z <= args.WaterLevel + args.BeachHeight; z++ ) {
                        if ( map.GetBlock( x, y, z ) != bGroundSurface )
                            continue;
                        bool found = false;
                        for ( int dx = -args.BeachExtent; !found && dx <= args.BeachExtent; dx++ ) {
                            for ( int dy = -args.BeachExtent; !found && dy <= args.BeachExtent; dy++ ) {
                                for ( int dz = -args.BeachHeight; dz <= 0; dz++ ) {
                                    if ( dx * dx + dy * dy + dz * dz > beachExtentSqr )
                                        continue;
                                    int xx = x + dx;
                                    int yy = y + dy;
                                    int zz = z + dz;
                                    if ( xx < 0 || xx >= map.Width || yy < 0 || yy >= map.Length || zz < 0 ||
                                        zz >= map.Height )
                                        continue;
                                    Block block = map.GetBlock( xx, yy, zz );
                                    if ( block == bWater || block == bWaterSurface ) {
                                        found = true;
                                        break;
                                    }
                                }
                            }
                        }
                        if ( found ) {
                            map.SetBlock( x, y, z, bSeaFloor );
                            if ( z > 0 && map.GetBlock( x, y, z - 1 ) == bGround ) {
                                map.SetBlock( x, y, z - 1, bSeaFloor );
                            }
                        }
                    }
                }
            }
        }