private float GetBlockNoise(int blockX, int blockZ)
{
float mediumDetail = PerlinSimplexNoise.noise(blockX / 300.0f, blockZ / 300.0f, 20);
float fineDetail = PerlinSimplexNoise.noise(blockX / 80.0f, blockZ / 80.0f, 30);
float bigDetails = PerlinSimplexNoise.noise(blockX / 800.0f, blockZ / 800.0f);
float noise = bigDetails * 64.0f + mediumDetail * 32.0f + fineDetail * 16.0f; // *(bigDetails
// *
// 64.0f);
return(noise + 16);
}
protected virtual void generateTerrain(Region chunk, int blockXInChunk, int blockZInChunk, int worldX, int worldY, int worldDepthInBlocks)
{
// The lower ground level is at least this high.
int minimumGroundheight = worldDepthInBlocks / 4;
int minimumGroundDepth = (int)(worldDepthInBlocks * 0.75f);
float octave1 = PerlinSimplexNoise.noise(worldX * 0.0001f, worldY * 0.0001f) * 0.5f;
float octave2 = PerlinSimplexNoise.noise(worldX * 0.0005f, worldY * 0.0005f) * 0.25f;
float octave3 = PerlinSimplexNoise.noise(worldX * 0.005f, worldY * 0.005f) * 0.12f;
float octave4 = PerlinSimplexNoise.noise(worldX * 0.01f, worldY * 0.01f) * 0.12f;
float octave5 = PerlinSimplexNoise.noise(worldX * 0.03f, worldY * 0.03f) * octave4;
float lowerGroundHeight = octave1 + octave2 + octave3 + octave4 + octave5;
lowerGroundHeight = lowerGroundHeight * minimumGroundDepth + minimumGroundheight;
bool sunlit = true;
BlockType blockType = BlockType.None;
for (int y = worldDepthInBlocks - 1; y >= 0; y--)
{
if (y <= lowerGroundHeight)
{
if (sunlit)
{
blockType = BlockType.Grass;
sunlit = false;
}
else
{
blockType = BlockType.Rock;
}
}
chunk.AddBlock(blockXInChunk, y, blockZInChunk, blockType);
// Debug.WriteLine(string.Format("chunk {0} : ({1},{2},{3})={4}", chunk.Position, blockXInChunk, y, blockZInChunk, blockType));
}
}
protected override void generateTerrain(Region chunk, int x, int z, int blockX, int blockZ, int worldDepthInBlocks)
{
int groundHeight = (int)GetBlockNoise(blockX, blockZ);
if (groundHeight < 1)
{
groundHeight = 1;
}
else if (groundHeight > 128)
{
groundHeight = 96;
}
// Default to sunlit.. for caves
bool sunlit = true;
BlockType BlockType = BlockType.None;
chunk.Blocks[x, groundHeight, z] = BlockType.Grass;
chunk.Blocks[x, 0, z] = BlockType.Dirt;
for (int y = worldDepthInBlocks - 1; y > 0; y--)
{
if (y > groundHeight)
{
BlockType = BlockType.None;
}
// Or we at or below ground height?
else if (y < groundHeight)
{
// Since we are at or below ground height, let's see if we need
// to make
// a cave
int noiseX = (blockX + WorldSettings.SEED);
float octave1 = PerlinSimplexNoise.noise(noiseX * 0.009f, blockZ * 0.009f, y * 0.009f) * 0.25f;
float initialNoise = octave1 + PerlinSimplexNoise.noise(noiseX * 0.04f, blockZ * 0.04f, y * 0.04f) * 0.15f;
initialNoise += PerlinSimplexNoise.noise(noiseX * 0.08f, blockZ * 0.08f, y * 0.08f) * 0.05f;
if (initialNoise > 0.2f)
{
BlockType = BlockType.None;
}
else
{
// We've placed a block of dirt instead...nothing below us
// will be sunlit
if (sunlit)
{
sunlit = false;
BlockType = BlockType.Grass;
//chunk.addGrassBlock(x,y,z);
}
else
{
BlockType = BlockType.Dirt;
if (octave1 < 0.2f)
{
BlockType = BlockType.Rock;
}
}
}
}
chunk.AddBlock(x, y, z, BlockType);
}
}