Module:Number: Difference between revisions

Module:Number (view source)

514 bytes added , 17 April

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@@ Line 230: / Line 230: @@
  error(msg)
  end
+end
+-- Returns the probability of getting at least one drop, provided
+-- the drop rate and the current amount of drops.
+function p.getDropProbability(dropRate, totalDrops)
+ dropRate = p.clamp(dropRate, 0, 1)
+ return 1 - (1- dropRate) ^ 500
+end
+-- Returns the amount of drops required for a certain drop probability.
+function p.getDropsForProbability(dropRate, probability)
+ dropRate = p.clamp(dropRate, 0, 1)
+ probability = p.clamp(probability, 0, 1)
+ return math.log(1 - probability) / math.log(1 - dropRate)
 end
 return p