Polygonal Map Generation for RL Placement

An adaption based on Polygonal Map Generation for Games based on http://www-cs-students.stanford.edu/~amitp/game-programming/

Setup

Install this library polymap locally with pip

pip install -e .

Creating Maps

Creating a single map

The function polymap/new_map.py creates a new map, it can be run from the command line with options like this:

python polymap/new_map.py --n_cells=1000 --seed=$rep --fname test_map --export='all'

The options for export are:

json export all polygons as a json file with name {fname}.json
image export map as an image with name {fname}.png
all export json and image
None (or anything else) return the graph and the list of terrains (for notebooks, inside algorithms, etc.)

The new_map has several different generation parameters exposed that can be accessed when calling the function from the within python or the command line:

n_cell how many polygons to generate
n_rivers maximum number of rivers to generate
ocean_to_total_ratio the amount of ocean
lake_to_total_ratio the amount of lake

Though has it is procedural all of these values (except the n_cell) are guidelines not hard constraints.

Creating a set of maps

The script batch_map_gen.sh generates a set of maps, you can set the parameters in this file or edit the defaults in new_map.py. I created several different sets and uploaded them here.

I didn't do anything fancy to produce them in parallel, just runnning processes in the background -- for optimal performance only run as many at a time as you have cores.

Biomes

Each polygon has a biome type assigned to it defined by the combination of moisture and elevation. As many of these as you want can be defind, I kept it simple. You can see how these are defined in polymap/custom_map.py where I defined the graph.

-- Possible Terrains, lowest to highest --
* Dry 
    - Plains
    - Hills
    - Mountain
* Wet
    - Forest
    - Wooded Hills
    - Mountain
* Ocean
    - Deep Ocean
    - Ocean
* Coast
    - Coast
* Lake
    - Lake
"""

Libraries

Python - version 3.7.3
numpy
scipy
shapely
matplotlib
plotly

Status

Project: finished

agaier / Polygonal-Map-Gen