fCraft.MapGeneratorOld.AddSingleCave C# (CSharp) Method

        private static void AddSingleCave( Random rand, Map map, byte bedrockType, byte fillingType, int length, double maxDiameter )
        {
            int startX = rand.Next( 0, map.Width );
            int startY = rand.Next( 0, map.Length );
            int startZ = rand.Next( 0, map.Height );

            int k1;
            for ( k1 = 0; map.Blocks[startX + map.Width * map.Length * ( map.Height - 1 - startZ ) + map.Width * startY] != bedrockType && k1 < 10000; k1++ ) {
                startX = rand.Next( 0, map.Width );
                startY = rand.Next( 0, map.Length );
                startZ = rand.Next( 0, map.Height );
            }

            if ( k1 >= 10000 )
                return;

            int x = startX;
            int y = startY;
            int z = startZ;

            for ( int k2 = 0; k2 < length; k2++ ) {
                int diameter = ( int )( maxDiameter * rand.NextDouble() * map.Width );
                if ( diameter < 1 )
                    diameter = 2;
                int radius = diameter / 2;
                if ( radius == 0 )
                    radius = 1;
                x += ( int )( 0.7 * ( rand.NextDouble() - 0.5D ) * diameter );
                y += ( int )( 0.7 * ( rand.NextDouble() - 0.5D ) * diameter );
                z += ( int )( 0.7 * ( rand.NextDouble() - 0.5D ) * diameter );

                for ( int j3 = 0; j3 < diameter; j3++ ) {
                    for ( int k3 = 0; k3 < diameter; k3++ ) {
                        for ( int l3 = 0; l3 < diameter; l3++ ) {
                            if ( ( j3 - radius ) * ( j3 - radius ) + ( k3 - radius ) * ( k3 - radius ) + ( l3 - radius ) * ( l3 - radius ) >= radius * radius ||
                                x + j3 >= map.Width || z + k3 >= map.Height || y + l3 >= map.Length ||
                                x + j3 < 0 || z + k3 < 0 || y + l3 < 0 ) {
                                continue;
                            }

                            int index = x + j3 + map.Width * map.Length * ( map.Height - 1 - ( z + k3 ) ) + map.Width * ( y + l3 );

                            if ( map.Blocks[index] == bedrockType ) {
                                map.Blocks[index] = fillingType;
                            }
                            if ( ( fillingType == 10 || fillingType == 11 || fillingType == 8 || fillingType == 9 ) &&
                                z + k3 < startZ ) {
                                map.Blocks[index] = 0;
                            }
                        }
                    }
                }
            }
        }