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Talk:Stable Ages
Instability Formula[edit]
I've looked at some of the code for Mystcraft 0.9.5.00, and come up with what I believe to be the formula for determining instability. Feel free to correct anything you believe to be incorrect!
Instability = + (# of Biomes * 10) + (# of Biomes under Biome Controller Minimum * 25) + (# of Biomes over Biome Controller Maximum * 100) + (Missing Biome Controller?: 50) + (Missing Lighting Controller?: 50) + (Missing Terrain Controller?: 50) + (Missing Time Controller?: 50) + (Missing Weather Controller?: 50) + (# of extra Controllers * 200) + (>3 Crystals?: 200) + (>3 Glowstone?: 200) + (>3 Dungeons?: 100) + (>3 Mineshafts?: 100) + (>3 Strongholds?: 100) + (>3 Villages?: 100) + (>8 Obelisks?: 100) + (>8 Wooden Tendrils?: 100) + (Any # Dense Ores?: 600) + (Any # Accelerated?: 250) - (# of Random Explosions * 25) [All benefit lost if >3] - (# of Charged * 25) [All benefit lost if >3] - (# of Meteors * 125) [All benefit lost if >3] - (# of Scorched * 75) [All benefit lost if >3]
This sum is then modified based on Difficulty:
Peaceful: *0.25 Easy: *0.5 Normal: *1.0 Hard: *1.75
(Note that the Difficulty used by Mystcraft can be overridden by the general >> S:options.difficultyoverride setting; a value of 0 is peaceful, 1 is easy, 2 is normal, and 3 is hard)
I'm not completely clear on how the instability value is used, however from what I can tell, whenever MC checks instability, it will randomly select an effect with a stability rating able to offset the current instability 'deficit'. It will not select an effect with a stability value greater than 4*(Instability Deficit) - since the lowest stability rating is 50, a final instability rating less than 12.5 can be considered completely stable.