fCraft.VanillaMapGenState.Raise C# (CSharp) Method

        void Raise() {
            Random raiseRand = new Random( random.Next() );
            FilteredNoise raiseNoise1 = new FilteredNoise( new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ),
                                                           new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ) );
            FilteredNoise raiseNoise2 = new FilteredNoise( new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ),
                                                           new PerlinNoise( raiseRand, genParams.TerrainDetailOctaves ) );
            PerlinNoise raiseNoise3 = new PerlinNoise( raiseRand, genParams.TerrainFeatureOctaves );

            const double scale = 1.3;
            for( int x = 0; x < genParams.MapWidth; x++ ) {
                for( int y = 0; y < genParams.MapLength; y++ ) {
                    double d2 = raiseNoise1.GetNoise( x*scale, y*scale )/6 - 4;
                    double d3 = raiseNoise2.GetNoise( x*scale, y*scale )/5 + 10 - 4;
                    double d4 = raiseNoise3.GetNoise( x, y )/8;
                    if( d4 > 0 )
                        d3 = d2;
                    double elevation = Math.Max( d2, d3 )/2;
                    if( elevation < 0 )
                        elevation *= 0.8;
                    heightmap[(x + y*genParams.MapWidth)] = (int)elevation;
                }
            }
        }