public FilteredNoise( [NotNull] PerlinNoise noise1, [NotNull] PerlinNoise noise2 )
{
if( noise1 == null ) throw new ArgumentNullException( "noise1" );
if( noise2 == null ) throw new ArgumentNullException( "noise2" );
this.noise1 = noise1;
this.noise2 = noise2;
}
void Raise()
{
FilteredNoise raiseNoise1 = new FilteredNoise( new PerlinNoise( random, TerrainDetailOctaves ),
new PerlinNoise( random, TerrainDetailOctaves ) );
FilteredNoise raiseNoise2 = new FilteredNoise( new PerlinNoise( random, TerrainDetailOctaves ),
new PerlinNoise( random, TerrainDetailOctaves ) );
PerlinNoise raiseNoise3 = new PerlinNoise( random, TerrainFeatureOctaves );
// raising
const double scale = 1.3;
for( int x = 0; x < mapWidth; x++ ) {
for( int y = 0; y < mapLength; y++ ) {
double d2 = raiseNoise1.GetNoise( x * scale, y * scale ) / 6.0 - 4;
double d3 = raiseNoise2.GetNoise( x * scale, y * scale ) / 5.0 + 10.0 - 4;
double d4 = raiseNoise3.GetNoise( x, y ) / 8.0;
if( d4 > 0 )
d3 = d2;
double elevation = Math.Max( d2, d3 ) / 2.0;
if( elevation < 0 )
elevation *= 0.8;
heightmap[( x + y * mapWidth )] = (int)elevation;
}
}
}
void Soil()
{
PerlinNoise soilNoise1 = new PerlinNoise( random, 8 );
for( int x = 0; x < mapWidth; x++ ) {
for( int y = 0; y < mapLength; y++ ) {
int i7 = (int)( soilNoise1.GetNoise( x, y ) / 24.0 ) - 4;
int i19 = heightmap[( x + y * mapWidth )] + waterLevel;
int i21 = i19 + i7;
heightmap[( x + y * mapWidth )] = Math.Max( i19, i21 );
if( heightmap[( x + y * mapWidth )] > mapHeight - 2 )
heightmap[( x + y * mapWidth )] = ( mapHeight - 2 );
if( heightmap[( x + y * mapWidth )] < 1 )
heightmap[( x + y * mapWidth )] = 1;
for( int z = 0; z < mapHeight; z++ ) {
Block block = Block.Air;
if( z <= i19 )
block = Block.Dirt;
if( z <= i21 )
block = Block.Stone;
if( z == 0 )
block = Block.Lava;
int index = ( z * mapLength + y ) * mapWidth + x;
blocks[index] = (byte)block;
}
}
}
}
void Grow()
{
PerlinNoise growNoise1 = new PerlinNoise( random, 8 );
PerlinNoise growNoise2 = new PerlinNoise( random, 8 );
for( int x = 0; x < mapWidth; x++ ) {
for( int y = 0; y < mapLength; y++ ) {
int elevation = heightmap[( x + y * mapWidth )];
Block blockAbove = (Block)blocks[( ( ( elevation + 1 ) * mapLength + y ) * mapWidth + x )];
int index = ( elevation * mapLength + y ) * mapWidth + x;
if( blockAbove == Block.Air ) {
bool placeSand = growNoise1.GetNoise( x, y ) > 8.0;
if( ( elevation <= mapHeight / 2 - 1 ) && placeSand ) {
blocks[index] = (byte)Block.Sand;
} else {
blocks[index] = (byte)Block.Grass;
}
} else if( ( ( blockAbove == Block.Water ) || ( blockAbove == Block.StillWater ) ) && ( elevation <= mapHeight / 2 - 1 ) ) {
bool placeGravel = growNoise2.GetNoise( x, y ) > 12.0;
if( placeGravel ) {
blocks[index] = (byte)Block.Gravel;
}
}
}
}
}