//Fills the column with air spaces to make caves
IEnumerator generateCaves(ChunkColumn column)
{
//Get the biome of the column
Biome biome = column.getBiome();
//Get the coordinates af the column
int x = column.getLocation().getBlockX();
int z = column.getLocation().getBlockZ();
//Get the highest block's z coordinate
int blockHeight = column.getHighestRenderableBlock().getBlockY();
//Get the cave size and frequency from the biome
int caveSize = biome.getCaveSize();
float caveFrequency = biome.getCaveFrequency();
//Create a noise generator that represents the probability of getting a cave as the caveFrequency as a percent
NoiseGenerator noiseGenerator = new NoiseGenerator(caveFrequency, 100);
//Iterate over all solid blocks in the column
for (int y = 0; y < blockHeight + 1; y++)
{
//Get the probability of having a cave at this coordinate
int caveChance = noiseGenerator.generateNoise(x, y, z);
//If the cave chance is within the likely hood of generating a cave
if (caveChance < caveSize)
{
Location airLocation = new Location(getWorld(), x, y, z);
column.setBlock(y, new Air(airLocation));
}
yield return(null);
}
column.recalculateRendering();
}