java - Eliminating (or detecting) holes in procedural noise for game development

Question

I've been following this page http://devmag.org.za/2009/04/25/perlin-noise/ as a guide to create my own perlin noise - it's been pointed out in the comments section that this is FBM noise, but that's irrelevant.

This is working very nicely so far, these are the results, after some 'cleaning' to remove as many artifacts as I can. http://puu.sh/dayg9/2943aca5ce.png

Now that I've created my noise, I'm going to use it as an infinite map for a platform game. However, as you can see, there are some holes in my noise.

-Please note- this noise is meant for a 2D game!

My question is - how can I either fill in these holes, or stop the player from spawning inside them? Can't find an answer despite a lot of googling and thinking EXTRA hard.

Thanks for your time:)

Answer 1

Just use a Non-Euclidean http://en.wikipedia.org/wiki/Haversine_formula based algorithm to first look at where they are spawning to find the number of objects within a set gap size, and then move the player to a different spawn area if the count is too low.

For speed you could calculate this at initial area generation generation time, and then cache the results on a per-region basis to make it easy to query.