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Flora spread: Reduce maximum density

Previously, maximum flora density was chosen based on the extremely rare
occurrence of all 8 flowers being at high density at one location. This
caused flora everywhere to spread to an unacceptably high density.

Revert the threshold to 3, which in testing results in a more acceptable
maximum density of 7 flora per 9x9 area.
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paramat committed Jul 17, 2018
1 parent ee72bc7 commit bf3efa0bb71ae5131e4aec053c9f614b52f8a36e
Showing with 3 additions and 6 deletions.
  1. +3 −6 mods/flowers/init.lua
@@ -139,12 +139,9 @@ function flowers.flower_spread(pos, node)

local pos0 = vector.subtract(pos, 4)
local pos1 = vector.add(pos, 4)
-- Maximum flower density created by mapgen is 13 per 9x9 area.
-- The limit of 7 below was tuned by in-game testing to result in a maximum
-- flower density by ABM spread of 13 per 9x9 area.
-- Warning: Setting this limit theoretically without in-game testing
-- results in a maximum flower density by ABM spread that is far too high.
if #minetest.find_nodes_in_area(pos0, pos1, "group:flora") > 7 then
-- Testing shows that a threshold of 3 results in an appropriate maximum
-- density of approximately 7 flora per 9x9 area.
if #minetest.find_nodes_in_area(pos0, pos1, "group:flora") > 3 then
return
end

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