This simple python script generate a map with floating islands
You can download a zipped world ready to use.
A minecraft map is divided in regions (512 x 256 x 512 blocks). Each region is divided into Chunk (32x256x32 blocks), and each chunk is devided into (vertical) sections (32x32x32 blocks).
Each region of coordinates (rx, rz) is stored in a region file
named r.rx.rz.mca. This python script generate such
files in his execution folder.
To generate a map, create a world with minecraft,
move to the world/region/ folder and call the
script ~/minecraft-floating-islands-generator/generate_world.py.
This will generate files with name r.rx.ry.mca where rx and ry
are integers corresponding to the coordinates of a region.
This files will contain the new generated land.
You can select which region should be generated by editing the lines
X_AMPLITUDE = 2
Z_AMPLITUDE = 2from the script. By default, it generates the regions
with rx in [-2, -1, 0, 1, 2] and rx in [-2, -1, 0, 1, 2].
It is a total of 25 regions.
Other region of your map won't be affected by this script.
The generator create rock/dirt island, populate them with trees and few ores (metal, diamons, gold, coal).
The noise generator is very fast, thanks to the awesome pyfastnoisesimd
library.
Yet, this script is very slow.
The actual bottleneck is the usage of
the python anvil library that use list of Block object istead of
simple binary chunk. Using directly the NBT library and
converting numpy array into directly into a binary array
could reduce the saving process to only few seconds.
The second bottlebeck is the manipulation of a np.array of python
Block object insted of simple integers. Using integers and a palet
(block <-> integer dictionnary) would improve the speed of populating
dramatically, and simplify drastically the code.