Merge pull request 'Mapgen optimisations' (#3607) from mapgen_optimisation into master

Reviewed-on: MineClone2/MineClone2#3607

mods/MAPGEN/mcl_biomes/init.lua

@@ -6066,10 +6066,8 @@ if mg_name ~= "singlenode" then
 	for _, f in pairs(deco_ids_trees) do
 		minetest.set_gen_notify({decoration = true}, {f})
 	end
-	if deco_id_chorus_plant or deco_ids_fungus or deco_ids_trees then
-		mcl_mapgen_core.register_generator("chorus_grow", nil, function(minp, maxp, blockseed)
-			local gennotify = minetest.get_mapgen_object("gennotify")
-			local pr = PseudoRandom(blockseed + 14)
+
+	local function mangrove_roots_gen(gennotify, pr)
 		for _, f in pairs(deco_ids_trees) do
 			for _, pos in ipairs(gennotify["decoration#" .. f] or {}) do
 				local nn = minetest.find_nodes_in_area(vector.offset(pos, -8, -1, -8), vector.offset(pos, 8, 0, 8), {"mcl_mangrove:mangrove_roots"})
@@ -6090,9 +6088,9 @@ if mg_name ~= "singlenode" then
 				end
 			end
 		end
-			if minp.y > -26900 then
-				return
 	end
+
+	local function chorus_gen (gennotify, pr)
 		for _, pos in ipairs(gennotify["decoration#" .. deco_id_chorus_plant] or {}) do
 			local x, y, z = pos.x, pos.y, pos.z
 			if x < -10 or x > 10 or z < -10 or z > 10 then
@@ -6103,14 +6101,48 @@ if mg_name ~= "singlenode" then
 				end
 			end
 		end
-			if minp.y > mcl_vars.mg_nether_max then
-				return
 	end
+
+	local function crimson_warped_gen(gennotify)
 		for _, f in pairs(deco_ids_fungus) do
 			for _, pos in ipairs(gennotify["decoration#" .. f] or {}) do
 				minetest.fix_light(vector.offset(pos, -8, -8, -8), vector.offset(pos, 8, 8, 8))
 			end
 		end
+	end
+
+	if deco_id_chorus_plant or deco_ids_fungus or deco_ids_trees then
+		mcl_mapgen_core.register_generator("chorus_grow", nil, function(minp, maxp, blockseed)
+			local gennotify = minetest.get_mapgen_object("gennotify")
+			local pr = PseudoRandom(blockseed + 14)
+
+			if not (maxp.y < mcl_vars.mg_overworld_min or minp.y > mcl_vars.mg_overworld_max) then
+				local biomemap = minetest.get_mapgen_object("biomemap")
+				--minetest.log("mangrove stuff: " .. dump(biomemap))
+				local swamp_biome_id = minetest.get_biome_id("MangroveSwamp")
+				local swamp_shore_id = minetest.get_biome_id("MangroveSwamp_shore")
+				local is_swamp = table.indexof(biomemap, swamp_biome_id) ~= -1
+				local is_swamp_shore = table.indexof(biomemap, swamp_shore_id) ~= -1
+
+				if is_swamp or is_swamp_shore then
+					--minetest.log("Mangrove swamp biomes...")
+					--minetest.log("is_swamp: " .. dump(is_swamp))
+					--minetest.log("is_swamp_shore: " .. dump(is_swamp_shore))
+					mangrove_roots_gen(gennotify, pr)
+				else
+					--minetest.log("is not mangrove swamp biomes...")
+				end
+			end
+
+			if not (maxp.y < mcl_vars.mg_end_min or minp.y > mcl_vars.mg_end_max) then
+				--minetest.log("chorus stuff")
+				chorus_gen(gennotify, pr)
+			end
+
+			if not (maxp.y < mcl_vars.mg_nether_min or minp.y > mcl_vars.mg_nether_max) then
+				--minetest.log("nether stuff")
+				crimson_warped_gen(gennotify)
+			end
 		end)
 	end
 

mods/MAPGEN/mcl_mapgen_core/init.lua

@@ -346,9 +346,16 @@ local function world_structure(vm, data, data2, emin, emax, area, minp, maxp, bl
 end
 
 local function block_fixes_grass(vm, data, data2, emin, emax, area, minp, maxp, blockseed)
+    if maxp.y < mcl_vars.mg_overworld_min then
+        --minetest.log("Exit grass fix")
+        return
+    else
+        --minetest.log("Grass fixes")
+    end
+
     local biomemap = minetest.get_mapgen_object("biomemap")
     local lvm_used = false
-	local pr = PseudoRandom(blockseed)
+
     if minp.y <= mcl_vars.mg_overworld_max and maxp.y >= mcl_vars.mg_overworld_min then
         -- Set param2 (=color) of nodes which use the grass colour palette.
         lvm_used = set_grass_palette(minp,maxp,data2,area,biomemap,{"group:grass_palette"})