fCraft.FloatingIslandMapGenState.PlantGrass C# (CSharp) Method

        void PlantGrass() {
            for( int x = 0; x < genParams.MapWidth; x++ ) {
                for( int y = 0; y < genParams.MapLength; y++ ) {
                    bool blockAboveIsAir = true;
                    for( int z = genParams.MapHeight - 1; z > 0; z-- ) {
                        bool thisBlockIsAir = (map.GetBlock( x, y, z ) == Block.Air);
                        if( blockAboveIsAir && !thisBlockIsAir ) {
                            map.SetBlock( x, y, z, Block.Grass );
                        }
                        blockAboveIsAir = thisBlockIsAir;
                    }
                }
            }
            /*
            PerlinNoise pn = new PerlinNoise( rand, 3 );
            for( int x = 1; x < genParams.MapWidth-1; x++ ) {
                for( int y = 1; y < genParams.MapLength-1; y++ ) {
                    for( int z = 1; z < genParams.MapHeight - 1; z++ ) {
                        if( map.GetBlock( x, y, z ) == Block.Grass ) {
                            double slope = FindSlope( x, y, z );
                            if( slope < 2 && pn.GetNoise( x/5d, y/5d ) > .6 ) {
                                map.SetBlock( x, y, z, Block.Sand );
                            }
                        }
                    }
                }
            }*/
        }