Generate chorus plants in the End

mods/ITEMS/mcl_end/chorus_plant.lua

@@ -3,6 +3,8 @@
 
 local S = minetest.get_translator("mcl_end")
 
+mcl_end = {}
+
 --- Plant parts ---
 
 local MAX_FLOWER_AGE = 5 -- Maximum age of chorus flower before it dies
@@ -168,14 +170,40 @@ minetest.register_node("mcl_end:chorus_plant", {
 	_mcl_hardness = 0.4,
 })
 
+-- Grow a complete chorus plant at pos
+mcl_end.grow_chorus_plant = function(pos, node)
+	local flowers = { pos }
+	-- Plant initial flower (if it isn't there already)
+	if not node then
+		node = minetest.get_node(pos)
+	end
+	if node.name ~= "mcl_end:chorus_flower" then
+		minetest.set_node(pos, { name = "mcl_end:chorus_flower" })
+	end
+	while true do
+		local new_flowers_list = {}
+		for f=1, #flowers do
+			local new_flowers = mcl_end.grow_chorus_plant_step(flowers[f], minetest.get_node(flowers[f]))
+			if #new_flowers > 0 then
+				table.insert(new_flowers_list, new_flowers)
+			end
+		end
+		if #new_flowers_list == 0 then
+			return
+		end
+		flowers = {}
+		for l=1, #new_flowers_list do
+			for f=1, #new_flowers_list[l] do
+				table.insert(flowers, new_flowers_list[l][f])
+			end
+		end
+	end
+end
 
---- ABM ---
-minetest.register_abm({
-	label = "Chorus plant growth",
-	nodenames = { "mcl_end:chorus_flower" },
-	interval = 35.0,
-	chance = 4.0,
-	action = function(pos, node, active_object_count, active_object_count_wider)
+-- Grow a single step of a chorus plant at pos.
+-- Pos must be a chorus flower.
+mcl_end.grow_chorus_plant_step = function(pos, node)
+	local new_flower_buds = {}
 	local above = { x = pos.x, y = pos.y + 1, z = pos.z }
 	local node_above = minetest.get_node(above)
 	local around = {
@@ -259,6 +287,7 @@ minetest.register_abm({
 					grown = true
 				else
 					minetest.set_node(f, {name="mcl_end:chorus_flower", param2 = age})
+					table.insert(new_flower_buds, f)
 					grown = true
 				end
 			end
@@ -271,6 +300,17 @@ minetest.register_abm({
 	if not grown then
 		minetest.set_node(pos, {name = "mcl_end:chorus_flower_dead"})
 	end
+	return new_flower_buds
+end
+
+--- ABM ---
+minetest.register_abm({
+	label = "Chorus plant growth",
+	nodenames = { "mcl_end:chorus_flower" },
+	interval = 35.0,
+	chance = 4.0,
+	action = function(pos, node, active_object_count, active_object_count_wider)
+		mcl_end.grow_chorus_plant_step(pos, node)
 	end,
 })
 

mods/MAPGEN/mcl_biomes/depends.txt

@@ -3,3 +3,4 @@ mcl_core
 mcl_worlds
 mcl_farming
 mcl_flowers
+mcl_end

mods/MAPGEN/mcl_biomes/init.lua

@@ -9,6 +9,8 @@ local generate_fallen_logs = minetest.settings:get_bool("mcl_generate_fallen_log
 -- Jungle bush schematic. In PC/Java Edition it's Jungle Wood + Oak Leaves
 local jungle_bush_schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_bush_oak_leaves.mts"
 
+local chorus_plant_deco_id
+
 --
 -- Register biomes
 --
@@ -1697,8 +1699,6 @@ local function register_dimension_ores()
 		clust_scarcity = 1,
 	})
 
-
-
 end
 
 
@@ -3240,7 +3240,38 @@ end
 
 -- Decorations in non-Overworld dimensions
 local function register_dimension_decorations()
-	-- TODO
+	--[[ NETHER ]]
+	-- TODO: Nether 
+
+	--[[ THE END ]]
+
+	-- Chorus plant
+	minetest.register_decoration({
+		name = "mcl_biomes:chorus_plant",
+		deco_type = "simple",
+		place_on = {"mcl_end:end_stone", "air"},
+		flags = "all_floors",
+		sidelen = 16,
+		noise_params = {
+			offset = -0.012,
+			scale = 0.024,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 257,
+			octaves = 3,
+			persist = 0.6
+		},
+		y_min = mcl_vars.mg_end_min,
+		y_max = mcl_vars.mg_end_max,
+		decoration = "mcl_end:chorus_flower",
+		height = 1,
+		biomes = { "End" },
+	})
+
+	deco_id_chorus_plant = minetest.get_decoration_id("mcl_biomes:chorus_plant")
+	minetest.set_gen_notify({decoration=true}, { deco_id_chorus_plant })
+
+	-- TODO: End cities
+
 end
 
 
@@ -3273,5 +3304,17 @@ if mg_name ~= "singlenode" then
 	register_dimension_decorations()
 
 	-- Overworld decorations for v6 are handled in mcl_mapgen_core
+
+	if deco_id_chorus_plant then
+		minetest.register_on_generated(function(minp, maxp, blockseed)
+			local gennotify = minetest.get_mapgen_object("gennotify")
+			local poslist = {}
+			for _, pos in ipairs(gennotify["decoration#"..deco_id_chorus_plant] or {}) do
+				local realpos = { x = pos.x, y = pos.y + 1, z = pos.z }
+				mcl_end.grow_chorus_plant(realpos)
+			end
+		end)
+	end
+
 end