forked from minetest/minetest_game
Default: Optimise and simplify leafdecay ABM, remove cache
With thanks to contributor tenplus1 Remove leaf cache and globalstep accumulator limiter Use 'pos' instead of 'p0' Remove non-essential 'group:liquid' from 'neighbors' Increase chance value to 10 to compensate for disabled cache Disable 'catch-up' to avoid the ABM often becoming 10 times more intensive Remove use of 'do preserve' bool, instead simply 'return' Remove unnecessary checks for 'd' and 'd == 0' Don't 'get' n0, use already present 'node' instead Swap order two conditionals so that the one most likely is first
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paramat
parent
619ac52693
commit
2ecbc43a7a
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@ -126,6 +126,7 @@ minetest.register_abm({
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--
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-- optimized helper to put all items in an inventory into a drops list
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--
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function default.get_inventory_drops(pos, inventory, drops)
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local inv = minetest.get_meta(pos):get_inventory()
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local n = #drops
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@ -229,6 +230,7 @@ end
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--
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-- Fence registration helper
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--
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function default.register_fence(name, def)
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minetest.register_craft({
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output = name .. " 4",
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@ -286,16 +288,7 @@ end
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-- Leafdecay
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--
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default.leafdecay_trunk_cache = {}
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default.leafdecay_enable_cache = true
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-- Spread the load of finding trunks
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default.leafdecay_trunk_find_allow_accumulator = 0
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minetest.register_globalstep(function(dtime)
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local finds_per_second = 5000
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default.leafdecay_trunk_find_allow_accumulator =
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math.floor(dtime * finds_per_second)
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end)
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-- Prevent decay of placed leaves
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default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
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if placer and not placer:get_player_control().sneak then
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@ -305,80 +298,44 @@ default.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
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end
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end
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-- Leafdecay ABM
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minetest.register_abm({
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label = "Leaf decay",
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nodenames = {"group:leafdecay"},
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neighbors = {"air", "group:liquid"},
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-- A low interval and a high inverse chance spreads the load
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neighbors = {"air"},
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interval = 2,
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chance = 5,
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chance = 10,
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catch_up = false,
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action = function(p0, node, _, _)
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--print("leafdecay ABM at "..p0.x..", "..p0.y..", "..p0.z..")")
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local do_preserve = false
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local d = minetest.registered_nodes[node.name].groups.leafdecay
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if not d or d == 0 then
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--print("not groups.leafdecay")
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action = function(pos, node, _, _)
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-- Check if leaf is placed
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if node.param2 ~= 0 then
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return
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end
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local n0 = minetest.get_node(p0)
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if n0.param2 ~= 0 then
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--print("param2 ~= 0")
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local rad = minetest.registered_nodes[node.name].groups.leafdecay
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-- Assume ignore is a trunk, to make this
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-- work at the border of a loaded area
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if minetest.find_node_near(pos, rad, {"ignore", "group:tree"}) then
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return
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end
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local p0_hash = nil
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if default.leafdecay_enable_cache then
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p0_hash = minetest.hash_node_position(p0)
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local trunkp = default.leafdecay_trunk_cache[p0_hash]
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if trunkp then
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local n = minetest.get_node(trunkp)
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local reg = minetest.registered_nodes[n.name]
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-- Assume ignore is a trunk, to make the thing
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-- work at the border of the active area
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if n.name == "ignore" or (reg and reg.groups.tree and
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reg.groups.tree ~= 0) then
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--print("cached trunk still exists")
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return
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end
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--print("cached trunk is invalid")
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-- Cache is invalid
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table.remove(default.leafdecay_trunk_cache, p0_hash)
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-- Drop stuff
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local itemstacks = minetest.get_node_drops(node.name)
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for _, itemname in ipairs(itemstacks) do
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if itemname ~= node.name or
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minetest.get_item_group(node.name, "leafdecay_drop") ~= 0 then
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local p_drop = {
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x = pos.x - 0.5 + math.random(),
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y = pos.y - 0.5 + math.random(),
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z = pos.z - 0.5 + math.random(),
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}
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minetest.add_item(p_drop, itemname)
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end
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end
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if default.leafdecay_trunk_find_allow_accumulator <= 0 then
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return
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end
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default.leafdecay_trunk_find_allow_accumulator =
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default.leafdecay_trunk_find_allow_accumulator - 1
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-- Assume ignore is a trunk, to make the thing
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-- work at the border of the active area
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local p1 = minetest.find_node_near(p0, d, {"ignore", "group:tree"})
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if p1 then
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do_preserve = true
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if default.leafdecay_enable_cache then
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--print("caching trunk")
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-- Cache the trunk
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default.leafdecay_trunk_cache[p0_hash] = p1
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end
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end
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if not do_preserve then
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-- Drop stuff other than the node itself
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local itemstacks = minetest.get_node_drops(n0.name)
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for _, itemname in ipairs(itemstacks) do
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if minetest.get_item_group(n0.name, "leafdecay_drop") ~= 0 or
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itemname ~= n0.name then
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local p_drop = {
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x = p0.x - 0.5 + math.random(),
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y = p0.y - 0.5 + math.random(),
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z = p0.z - 0.5 + math.random(),
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}
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minetest.add_item(p_drop, itemname)
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end
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end
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-- Remove node
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minetest.remove_node(p0)
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nodeupdate(p0)
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end
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-- Remove node
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minetest.remove_node(pos)
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nodeupdate(pos)
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end
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})
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@ -440,6 +397,7 @@ minetest.register_abm({
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end
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})
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--
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-- Grass and dry grass removed in darkness
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--
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