There's really no such thing as endless or infinite in computer-generated worlds. Sooner or later, you're going to hit one limit or the other. However, there are some techniques that will get you further than others. The normal approach when creating a game is to move the player around the game world. Those who have tried to, for example, make a space exploration game in this way have noticed that pretty soon problems with regards to float numbers appear. This is because float values are not evenly spaced. As their values increase, their precision decreases. Using doubles rather than floats will only delay what's inevitable.

If you can't even have a solar system as a human-scaled game world, how can you then have a whole galaxy? As an old saying goes, "If Mohammed won't come to the mountain, the mountain must come to Mohammed." That is exactly the solution to our first problem! By making the game world move around the player, we ensure that the precision...