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Mushroom spread: Optimise and make overridable

Move mushroom spread ABM action into a global and overridable function.
Optimise spread code.
Reduce spread range to reduce spread through walls.
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tenplus1 authored and paramat committed Jul 30, 2017
1 parent 08727bc commit bcf98df5fac3eb59b02d9fdb066ab92c6228d787
Showing with 24 additions and 28 deletions.
  1. +24 −28 mods/flowers/init.lua
@@ -204,38 +204,34 @@ minetest.register_node("flowers:mushroom_brown", {

-- Mushroom spread and death

function flowers.mushroom_spread(pos, node)
if minetest.get_node_light(pos, nil) == 15 then
minetest.remove_node(pos)
return
end
local positions = minetest.find_nodes_in_area_under_air(
{x = pos.x - 1, y = pos.y - 2, z = pos.z - 1},
{x = pos.x + 1, y = pos.y + 1, z = pos.z + 1},
{"group:soil", "group:tree"})
if #positions == 0 then
return
end
local pos2 = positions[math.random(#positions)]
pos2.y = pos2.y + 1
if minetest.get_node_light(pos, 0.5) <= 3 and
minetest.get_node_light(pos2, 0.5) <= 3 then
minetest.set_node(pos2, {name = node.name})
end
end

minetest.register_abm({
label = "Mushroom spread",
nodenames = {"flowers:mushroom_brown", "flowers:mushroom_red"},
interval = 11,
chance = 50,
action = function(pos, node)
if minetest.get_node_light(pos, nil) == 15 then
minetest.remove_node(pos)
return
end
local random = {
x = pos.x + math.random(-2, 2),
y = pos.y + math.random(-1, 1),
z = pos.z + math.random(-2, 2)
}
local random_node = minetest.get_node_or_nil(random)
if not random_node or random_node.name ~= "air" then
return
end
local node_under = minetest.get_node_or_nil({x = random.x,
y = random.y - 1, z = random.z})
if not node_under then
return
end

if (minetest.get_item_group(node_under.name, "soil") ~= 0 or
minetest.get_item_group(node_under.name, "tree") ~= 0) and
minetest.get_node_light(pos, 0.5) <= 3 and
minetest.get_node_light(random, 0.5) <= 3 then
minetest.set_node(random, {name = node.name})
end
end
chance = 150,
action = function(...)
flowers.mushroom_spread(...)
end,
})


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