fCraft.FloatingIslandMapGenState.MakeWater C# (CSharp) Method

        void MakeWater() {
            if( genParams.SpringDensity <= 0 ) return;
            int waterSources =
                (int)(map.Width*map.Length*genParams.SpringDensity/BaseSpringDensity/genParams.IslandDensity);
            for( int i = 0; i < waterSources; i++ ) {
                int x = rand.Next( 0, map.Width );
                int y = rand.Next( 0, map.Length );
                int z = rand.Next( map.Height/2, map.Height - 1 );
                while( z > 0 ) {
                    if( map.GetBlock( x, y, z + 1 ) == Block.Air && map.GetBlock( x, y, z ) == Block.Grass ) {
                        MakeWaterSource( x, y, z );
                        break;
                    }
                    z--;
                }
            }
        }