refactor nature_classic to avoid lag caused by its blossom abms

nature_classic/blossom.lua

@@ -1,21 +1,4 @@
--- Blossom
+-- Blossoms and such
-
-local BLOSSOM_NODE = "nature:blossom"
-local BLOSSOM_LEAVES = "default:leaves"
-local BLOSSOM_TEXTURES = { "default_leaves.png^nature_blossom.png" }
-
-if minetest.get_modpath("moretrees") then
-	BLOSSOM_NODE = "moretrees:apple_blossoms"
-	BLOSSOM_LEAVES = "moretrees:apple_tree_leaves"
-	BLOSSOM_TEXTURES = { "moretrees_apple_tree_leaves.png^nature_blossom.png" }
-	minetest.register_alias("nature:blossom", "default:leaves")
-end
-
-local BLOSSOM_CHANCE = 15
-local BLOSSOM_DELAY = 3600
-
-local APPLE_CHANCE = 10
-local APPLE_SPREAD = 2
 
 local function spawn_apple_under(pos)
     local below = {
@@ -28,10 +11,10 @@ local function spawn_apple_under(pos)
     end
 end
 
-minetest.register_node(":"..BLOSSOM_NODE, {
+minetest.register_node(":"..nature.blossom_node, {
     description = "Apple blossoms",
     drawtype = "allfaces_optional",
-    tiles = BLOSSOM_TEXTURES,
+    tiles = nature.blossom_textures,
     paramtype = "light",
     groups = { snappy = 3, leafdecay = 3, flammable = 2 },
     sounds = default.node_sound_leaves_defaults(),
@@ -40,42 +23,42 @@ minetest.register_node(":"..BLOSSOM_NODE, {
 
 minetest.register_craft({
     type = "fuel",
-    recipe = BLOSSOM_NODE,
+    recipe = nature.blossom_node,
     burntime = 2,
 })
 
--- Blossoming
+-- these ABMs can get heavy, so just enqueue the nodes
+
+-- Adding Blossoms
 minetest.register_abm({
-    nodenames = { BLOSSOM_LEAVES },
+    nodenames = { nature.blossom_leaves },
-    interval = BLOSSOM_DELAY,
+    interval = nature.blossom_delay,
-    chance = BLOSSOM_CHANCE,
+    chance = nature.blossom_chance,
 
     action = function(pos, node, active_object_count, active_object_count_wider)
-		if nature:is_near_water(pos) then
+			nature.enqueue_node(pos, node, true)
-			nature:grow_node(pos, BLOSSOM_NODE)
-		end
     end
 })
 
--- Removing blossom
+-- Removing blossoms
 minetest.register_abm({
-    nodenames = { BLOSSOM_NODE },
+    nodenames = { nature.blossom_node },
-    interval = BLOSSOM_DELAY,
+    interval = nature.blossom_delay,
-    chance = BLOSSOM_CHANCE,
+    chance = nature.blossom_chance,
 
     action = function(pos, node, active_object_count, active_object_count_wider)
-		nature:grow_node(pos, BLOSSOM_LEAVES)
+			nature.enqueue_node(pos, node, false)
     end
 })
 
 -- Spawning apples
 minetest.register_abm({
-    nodenames = { BLOSSOM_NODE },
+    nodenames = { nature.blossom_node },
-    interval = BLOSSOM_DELAY,
+    interval = nature.blossom_delay,
-    chance = APPLE_CHANCE,
+    chance = nature.apple_chance,
 
     action = function(pos, node, active_object_count, active_object_count_wider)
-		if not minetest.find_node_near(pos, APPLE_SPREAD, { "default:apple" }) then
+		if nature.dtime < 0.2 and not minetest.find_node_near(pos, nature.apple_spread, { "default:apple" }) then
 			spawn_apple_under(pos)
 		end
     end

nature_classic/config.lua

@@ -1,6 +1,6 @@
 -- Set on which distance from water can the tree still grow.
 -- Grows anywhere if set to -1.
-DISTANCE_FROM_WATER = 20
+nature.distance_from_water = 20
 
 -- Minimum light level needed to grow. Default is 8, which means daylight.
-MINIMUM_GROWTH_LIGHT = 8
+nature.minimum_growth_light = 8

nature_classic/global_function.lua

@@ -1,20 +1,35 @@
-local NODE_YOUNG = "young"
+-- helper functions
 
-local SETTING_TRUE = "true"
+minetest.register_globalstep(function(dtime)
-local SETTING_FALSE = "false"
+	nature.dtime = dtime
+	if #nature.blossomqueue > 0 and dtime < 0.2 then
+		local pos  = nature.blossomqueue[1][1]
+		local node = nature.blossomqueue[1][2]
+		if (nature.blossomqueue[1][3] and not nature:is_near_water(pos)) then
+			table.remove(nature.blossomqueue, 1) -- don't grow if it's not near water, pop from queue.
+			return
+		end
+		nature:grow_node(pos, nature.blossom_node) -- now actually grow it.
+		table.remove(nature.blossomqueue, 1)
+	end
+end)
 
-local YOUTH_DELAY = 5
+function nature.enqueue_node(pos, node, fcn)
-
+	local idx = #nature.blossomqueue
-nature = {}
+	nature.blossomqueue[idx+1] = {}
+	nature.blossomqueue[idx+1][1] = pos
+	nature.blossomqueue[idx+1][2] = node
+	nature.blossomqueue[idx+1][3] = fcn
+end
 
 local function set_young_node(pos)
     local meta = minetest.get_meta(pos)
 
-    meta:set_string(NODE_YOUNG, SETTING_TRUE)
+    meta:set_string(nature.node_young, nature.setting_true)
-    minetest.after(YOUTH_DELAY,
+    minetest.after(nature.youth_delay,
         function(pos)
             local meta = minetest.get_meta(pos)
-            meta:set_string(NODE_YOUNG, SETTING_FALSE)
+            meta:set_string(nature.node_young, nature.setting_false)
         end,
     pos)
 end
@@ -22,14 +37,14 @@ end
 local function is_not_young(pos)
     local meta = minetest.get_meta(pos)
 
-    local young = meta:get_string(NODE_YOUNG)
+    local young = meta:get_string(nature.node_young)
-    return young ~= SETTING_TRUE
+    return young ~= nature.setting_true
 end
 
 function nature:grow_node(pos, nodename)
     if pos ~= nil then
         local light_enough = minetest.get_node_light(pos, nil)
-                >= MINIMUM_GROWTH_LIGHT 
+                >= nature.minimum_growth_light 
 
         if is_not_young(pos) and light_enough then
             minetest.remove_node(pos)
@@ -43,6 +58,6 @@ function nature:grow_node(pos, nodename)
 end
 
 function nature:is_near_water(pos)
-    return DISTANCE_FROM_WATER == -1 or minetest.find_node_near(pos, DISTANCE_FROM_WATER,
+    return nature.distance_from_water == -1 or minetest.find_node_near(pos, nature.distance_from_water,
             { "default:water_source" }) ~= nil
 end

nature_classic/init.lua

@@ -5,6 +5,34 @@
 
 local current_mod_name = minetest.get_current_modname()
 
+nature = {}
+nature.blossomqueue = {}
+
+nature.blossom_node = "nature:blossom"
+nature.blossom_leaves = "default:leaves"
+nature.blossom_textures = { "default_leaves.png^nature_blossom.png" }
+
+if minetest.get_modpath("moretrees") then
+	nature.blossom_node = "moretrees:apple_blossoms"
+	nature.blossom_leaves = "moretrees:apple_tree_leaves"
+	nature.blossom_textures = { "moretrees_apple_tree_leaves.png^nature_blossom.png" }
+	minetest.register_alias("nature:blossom", "default:leaves")
+end
+
+nature.blossom_chance = 15
+nature.blossom_delay = 10 --3600
+nature.apple_chance = 10
+nature.apple_spread = 2
+
+nature.node_young = "young"
+nature.setting_true = "true"
+nature.setting_false = "false"
+nature.youth_delay = 5
+
+function dumppos(pos)
+	return "("..pos.x..","..pos.y..","..pos.z..")"
+end
+
 dofile(minetest.get_modpath(current_mod_name) .. "/config.lua")
 dofile(minetest.get_modpath(current_mod_name) .. "/global_function.lua")
 dofile(minetest.get_modpath(current_mod_name) .. "/blossom.lua")