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Flower spread ABM: Optimise

Match maximum spread density to maximum mapgen density for flowers.
Place 3 flora nodes at once instead of 1.
Change ABM chance value to 300 to match previous spread rate.
ABM becomes 3 times less intensive.
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paramat committed Jan 15, 2018
1 parent d1ece74 commit 1c7691cc27b801c453217077bfd1e11e9d2e79d9
Showing with 15 additions and 13 deletions.
  1. +15 −13 mods/flowers/init.lua
@@ -139,32 +139,34 @@ function flowers.flower_spread(pos, node)

local pos0 = vector.subtract(pos, 4)
local pos1 = vector.add(pos, 4)
if #minetest.find_nodes_in_area(pos0, pos1, "group:flora") > 3 then
-- A limit of 11 in a 9*9 area, and 3 added at once, results in an average
-- maximum density of 13, this matches maximum mapgen flower density.
if #minetest.find_nodes_in_area(pos0, pos1, "group:flora") > 11 then
return
end

local soils = minetest.find_nodes_in_area_under_air(
pos0, pos1, "group:soil")
if #soils > 0 then
local seedling = soils[math.random(#soils)]
local seedling_above =
{x = seedling.x, y = seedling.y + 1, z = seedling.z}
light = minetest.get_node_light(seedling_above)
if not light or light < 13 or
-- Desert sand is in the soil group
minetest.get_node(seedling).name == "default:desert_sand" then
return
local num_soils = #soils
if num_soils >= 1 then
for si = 1, math.min(3, num_soils) do
local soil = soils[math.random(num_soils)]
local soil_above = {x = soil.x, y = soil.y + 1, z = soil.z}
light = minetest.get_node_light(soil_above)
if light and light >= 13 and
-- Desert sand is in the soil group
minetest.get_node(soil).name ~= "default:desert_sand" then
minetest.set_node(soil_above, {name = node.name})
end
end

minetest.set_node(seedling_above, {name = node.name})
end
end

minetest.register_abm({
label = "Flower spread",
nodenames = {"group:flora"},
interval = 13,
chance = 96,
chance = 300,
action = function(...)
flowers.flower_spread(...)
end,

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