There are a lot of variants to explore! The demo above shows a fraction of what’s possible with these algorithms.Īlso take a look at Azgaar’s Fantasy Map Generator, an amazing open source project with features discussed on github, reddit, blog, wiki, and trello. Another project might need biomes based on latitude and rainfall, which could be influenced by wind, which could be influenced by mountain ranges or weather systems. This project needed simple biomes based on distance to coastline and distance to water.
Another project might need caves, cliffs, canyons, or chasms. Another project might need continents, where mountains are not limited to being in the center. This project needed mountains to be in the center of the island. Another project might need maps not completely surrounded by water. This project needed coastlines to be interesting island shapes. I drew the icons by hand and made them available for use under the Creative Commons CC-BY license.įeel free to use the map generator in your projects! For other projects, I would use some of the same core algorithms but might assign coastlines, mountains, and biomes differently than what I did for this project.The UI for this page is Apache2 licensed, and can be seen in: draw.js + mapgen2.js + colormap.js.There’s a C++ / Unreal port of this project.I used the mapbox/delaunator library, for fast Delaunay triangulation, ISC license.redblobgames/dual-mesh, Javascript dual mesh library, Apache2 license.redblobgames/mapgen2, Javascript map generation algorithms, Apache2 license.It then simulates evaporation, wind, and rainfall, generating biomes and rivers that fit your map. Later I wrote a stylized map output that I then reused here.Īlso take a look at mapgen4, my newer map generator that allows painting your own mountains, valleys, and oceans.
Back in 2010 I wrote an article about the algorithms the original demo was in Flash. The generator intentionally makes unrealistic terrain that was designed for the needs of our game, Realm of the Mad God.
You can right-click on the map to save a higher resolution image, or click the share link to save all the current parameters in a URL. Can you find an ice lake? They’re rare at the default temperature.
Try clicking on the Seed input box and hold down the Up arrow key to quickly scan many different island shapes. The simplest way to explore the maps is to click the plus/minus arrows to change the Seed. This map generator creates volcanic island style maps.
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