public FilteredNoise( PerlinNoise noise1, PerlinNoise noise2 ) {
this.noise1 = noise1;
this.noise2 = noise2;
}
public FilteredNoise(PerlinNoise noise1, PerlinNoise noise2)
{
this.noise1 = noise1;
this.noise2 = noise2;
}
// fill the map with blocks based on the heightmap
void Soil() {
Random soilRand = new Random( random.Next() );
PerlinNoise soilNoise1 = new PerlinNoise( soilRand, 8 );
for( int x = 0; x < genParams.MapWidth; x++ ) {
for( int y = 0; y < genParams.MapLength; y++ ) {
int i7 = (int)(soilNoise1.GetNoise( x, y )/24) - 4;
int i19 = heightmap[(x + y*genParams.MapWidth)] + waterLevel;
int i21 = i19 + i7;
heightmap[(x + y*genParams.MapWidth)] = Math.Max( i19, i21 );
if( heightmap[(x + y*genParams.MapWidth)] > genParams.MapHeight - 2 )
heightmap[(x + y*genParams.MapWidth)] = (genParams.MapHeight - 2);
if( heightmap[(x + y*genParams.MapWidth)] < 1 )
heightmap[(x + y*genParams.MapWidth)] = 1;
for( int z = 0; z < genParams.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*genParams.MapLength + y)*genParams.MapWidth + x;
blocks[index] = (byte)block;
}
}
}
}
// replaces dirt with sand, grass, or gravel
void Grow() {
PerlinNoise growNoise1 = new PerlinNoise( random, 8 );
PerlinNoise growNoise2 = new PerlinNoise( random, 8 );
for( int x = 0; x < genParams.MapWidth; x++ ) {
for( int y = 0; y < genParams.MapLength; y++ ) {
int elevation = heightmap[(x + y*genParams.MapWidth)];
Block blockAbove = (Block)blocks[(((elevation + 1)*genParams.MapLength + y)*genParams.MapWidth + x)];
int index = (elevation*genParams.MapLength + y)*genParams.MapWidth + x;
if( blockAbove == Block.Air ) {
bool placeSand = growNoise1.GetNoise( x, y ) > 8;
if( (elevation <= waterLevel - 1) && placeSand ) {
blocks[index] = (byte)Block.Sand;
} else {
blocks[index] = (byte)Block.Grass;
}
} else if( ((blockAbove == Block.Water) || (blockAbove == Block.StillWater)) &&
(elevation <= waterLevel - 1) ) {
bool placeGravel = growNoise2.GetNoise( x, y ) > 12;
if( placeGravel ) {
blocks[index] = (byte)Block.Gravel;
}
}
}
}
}
// create the base heightmap
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;
}
}
}