l use perlin noise to detect whether the position at x and z belong to the sumpf biome.
https://github.com/HybridDog/sumpf/blob ... n.lua#L127
To allow custom biome sizes and rarity, l need to find out how to predict the noise values occurrences. Simply using sinus doesn't work right.
p(v) is the chance the abs of a randomly picked value is smaller than v.
p(0) = 0 of course,
p(1) ≈ 1 (The values are not always inside [-1; 1].)
p(0.5) > 0.5 l assume
How can l calculate p(v)?
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Perlin noise average values
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Re: Perlin noise average values
I'd like to know this too. For example what noise thresholds to use if i want to divide a world equally into 3 biomes.
It's easy to calculate the maximum noise value from octaves and persistence though.
It's easy to calculate the maximum noise value from octaves and persistence though.
- Hybrid Dog
- Member
- Posts: 2460
- Joined: Thu Nov 01, 2012 12:46
l made a mod to collect the values and show their distribution in a picture: https://github.com/HybridDog/pnoiseana
- Attachments
-
- {
offset = 0,
scale = 1,
spread = {x=25, y=25, z=25},
seed = 9130,
octaves = 3,
persist = 0.5
} - tmp.png (1.01 KiB) Viewed 1034 times
Re: Perlin noise average values
Yeah i researched this on the net and analysing large numbers of calculated results seems the easiest way.
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