寻找一个好的世界地图生成算法

问题描述

我正在开展一个类似文明的游戏，我正在寻找一个很好的算法来生成地球般的世界地图。我已经尝试了几个替代方案，但还没有打到真正的赢家。

一个选项是使用并修改您的第二个想法。一旦生成了大陆（大致相同的大小），让它们随机移动并旋转并相互碰撞并相互变形，并相互分离。 （注意：这可能不是实现最简单的方法。）

编辑：这样做，完成实施 - 。

I'm working on a Civilization-like game and I'm looking for a good algorithm for generating Earth-like world maps. I've experimented with a few alternatives, but haven't hit on a real winner yet.

One option is to generate a heightmap using Perlin noise and add water at a level so that about 30% of the world is land. While Perlin noise (or similar fractal-based techniques) is frequently used for terrain and is reasonably realistic, it doesn't offer much in the way of control over the number, size and position of the resulting continents, which I'd like to have from a gameplay perspective.

A second option is to start with a randomly positioned one-tile seed (I'm working on a grid of tiles), determine the desired size for the continent and each turn add a tile that is horizontally or vertically adjacent to the existing continent until you've reached the desired size. Repeat for the other continents. This technique is part of the algorithm used in Civilization 4. The problem is that after placing the first few continents, it's possible to pick a starting location that's surrounded by other continents, and thus won't fit the new one. Also, it has a tendency to spawn continents too close together, resulting in something that looks more like a river than continents.

Does anyone happen to know a good algorithm for generating realistic continents on a grid-based map while keeping control over their number and relative sizes?

解决方案

You could take a cue from nature and modify your second idea. Once you generate your continents (which are all about the same size), get them to randomly move and rotate and collide and deform each other and drift apart from each other. (Note: this may not be the easiest thing ever to implement.)

Edit: Here's another way of doing it, complete with an implementation — Polygonal Map Generation for Games.

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