//Generates all the dirt in the map
//A dirt block will only be generated at a specific position iff
// - Its y-coordinate is at or below the max dirt height for that x-coordinate
// - There is not a cave located at its position
private void GenerateDirt()
{
//Variables used to calculate the average height of the top level of dirt
topLevelSum = 0.0;
numTopLevels = 0;
avgTopLevel = 0.0;
//The max height of every column of blocks
maxHeights = new int[BIOME_WIDTH];
for (int i = 0; i < BIOME_WIDTH; i++)
{
maxHeights[i] = -1;
}
//Variables used to calculate the average height of the top level of dirt
topLevelSum = 0.0;
numTopLevels = 0;
avgTopLevel = 0.0;
//Generates dirt
for (int x = 0; x < BIOME_WIDTH; x++, xHeight += xHeightFreq, xCave += xCaveFreq)
{
//The top level that the dirt will go to
double topLevel = PerlinNoise1D.getNoise(xHeight) * BIOME_HEIGHT * topLevelScale;
if (topLevel > (double)BIOME_HEIGHT - 1)
{
topLevel = BIOME_HEIGHT - 1;
}
topLevelSum += topLevel;
++numTopLevels;
avgTopLevel = topLevelSum / numTopLevels;
yCave = 0.0;
double thresh = 1.0;
for (int y = (int)topLevel; y >= 0; y--, yCave += yCaveFreq)
{
double n = ((SimplexNoise2D.octaveNoise2D(5, 0.1, 0.2, xCave, yCave) + 1.0) / 2.0 * 5.0);
//Builds a dirt block if it is below the max height generated by the height generator and if there isnt a cave there
if ((int)n > 1 || y > topLevel * topLevelScale * 1.2)
{
if (maxHeights[x] == -1)
{
maxHeights[x] = y;
}
map[x][y].SetBT(BlockType.DIRT);
}
if (n >= thresh)
{
backMap[x][y] = new PrimitiveBlock(x, y, BlockType.DIRT);
}
else
{
if (rand.Next(15) == 0)
{
thresh = rand.NextDouble() + 1;
}
}
}
}
}
public GlobalGenerator(uint seed)
{
_random = new FastRandom(seed);
_sysRand = new System.Random((int)seed);
_heightMap0 = new SimplexNoise2D(_random.NextUInt());
}