fCraft.VanillaMapGenState.Erode C# (CSharp) Method

        void Erode() {
            Random erodeRand = new Random( random.Next() );
            FilteredNoise erodeNoise1 = new FilteredNoise( new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ),
                                                           new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ) );
            FilteredNoise erodeNoise2 = new FilteredNoise( new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ),
                                                           new PerlinNoise( erodeRand, genParams.TerrainDetailOctaves ) );
            for( int x = 0; x < genParams.MapWidth; x++ ) {
                for( int y = 0; y < genParams.MapLength; y++ ) {
                    double d1 = erodeNoise1.GetNoise( x*2, y*2 )/8;
                    int i7 = erodeNoise2.GetNoise( x*2, y*2 ) > 0 ? 1 : 0;
                    if( d1 <= 2 )
                        continue;
                    int i19 = ((heightmap[(x + y*genParams.MapWidth)] - i7)/2*2) + i7;
                    heightmap[(x + y*genParams.MapWidth)] = i19;
                }
            }
        }