initial commit

init.lua

@@ -0,0 +1,129 @@
+-- Step on a node, spawn a mob
+
+spawnstep = {}
+
+spawnstep.proximity = 5 -- radius range of node detection
+spawnstep.spawnrange = 7 -- radius range of where the mob will spawn
+
+spawnstep.interval = 1
+
+spawnstep.maxmobs = 4 -- maxiumum number of mobs to allow in area
+
+
+dofile(minetest.get_modpath("spawnstep").."/spawndefs.lua")
+
+minetest.register_privilege("spawner","Allow player to spawn mobs")
+minetest.register_privilege("digspawntrap","Allow player to dig spawn traps")
+
+minetest.register_node("spawnstep:spawntrap",{
+	description = "Spawn a mob depending on the block beneath it",
+	tiles = {"default_mese_block.png"},
+	drawtype = "normal",
+	groups = {crumbly = 1},
+	on_dig = function(pos,node,player)
+		if minetest.check_player_privs(player:get_player_name(), {digspawntrap=true}) then
+			minetest.remove_node(pos)
+		end
+	end
+})
+
+local spawn_mob = function(pos,mobname)
+	-- spawn a mob within spawnrange nodes of position pos
+	local mobdef = minetest.registered_entities[mobname]
+	if mobdef == nil then return end
+
+	local spawninnode = {"air"}
+	if mobdef.fly_in then spawninnode = {mobdef.fly_in} end
+
+	local range = spawnstep.spawnrange
+	local candidatenodes = minetest.find_nodes_in_area(
+		{x = pos.x -range, y = pos.y - range, z = pos.z -range},
+		{x = pos.x +range, y = pos.y + range, z = pos.z +range},
+		spawninnode
+	)
+	local newpos = candidatenodes[ math.random(1,#candidatenodes) ]
+
+	minetest.add_entity(newpos,mobname)
+end
+
+local count_nearby_mobs = function(pos,radius)
+	-- check if there are entities around already
+	local objcount = 0
+	for _,obj in pairs(minetest.get_objects_inside_radius(pos ,radius)) do
+		if not obj:is_player() then
+			objcount = objcount+1
+		end
+	end
+	return objcount
+end
+
+local get_mob_from_node = function(pos)
+	-- return the expected mob, or nil if none matches
+	-- get node under position
+	local underpos = {x=pos.x, y=pos.y-1, z=pos.z}
+	local tellernode = minetest.get_node(underpos).name
+	-- iterate spawnstep.mobnodes, check against nodename
+	for _,mobnode in pairs(spawnstep.mobnodes) do
+		-- if match, return mobstring
+		if mobnode.node == tellernode then return mobnode.mob end
+	end
+	return nil
+end
+
+local chat_spawn_mob = function(playername,paramstring) -- used by chat command and by global step
+	local piterator = string.gmatch(paramstring,"%S+")
+	-- get player name
+	local victim = piterator()
+	-- get mob name
+	local mobname = piterator()
+
+	if mobname == nil or victim == nil then
+		minetest.chat_send_player(playername,"Usage: /spawnto <PLAYER> <MOB NAME>")
+		return
+	end
+
+	if not minetest.registered_entities[mobname] then
+		if not spawnstep.mobnodes[mobname] then
+			minetest.chat_send_player(playername,"No such mob "..mobname)
+			return
+		end
+		mobname = spawnstep.mobnodes[mobname].mob
+		if not minetest.registered_entities[mobname] then
+			minetest.chat_send_player(playername,"No such mob "..mobname.." - contact the admin.")
+			return
+		end
+	end
+
+	-- get player position
+	local pos = vector.round(minetest.get_player_by_name(victim):getpos())
+	-- add entity near player's position
+	spawn_mob(pos,mobname)
+end
+
+minetest.register_chatcommand("spawnto",{
+	privs = "spawner",
+	params = "<PLAYER> <MOBSTRING>",
+	func = chat_spawn_mob
+})
+
+minetest.register_abm{
+        nodenames = {"spawnstep:spawntrap"},
+        neighbors = {"group:liquid","air"},
+        interval = spawnstep.interval,
+        chance = 1,
+        action = function(pos)
+		for _,obj in pairs(minetest.get_objects_inside_radius(pos ,spawnstep.proximity)) do
+			if obj:is_player() then
+				if count_nearby_mobs(pos,math.ceil(spawnstep.spawnrange*3)) < spawnstep.maxmobs then
+					local mobname = get_mob_from_node(pos)
+					if mobname ~= nil then
+						local mobnicename = mobname:sub(mobname:find(':')+1,#mobname )
+						minetest.chat_send_player(obj:get_player_name(),"A wild "..mobnicename.." appeared!")
+						spawn_mob(pos,mobname)
+					end
+				end
+			end
+		end
+        end,
+}
+

mod.conf

@@ -0,0 +1 @@
+name = spawnstep

spawndefs.lua

@@ -0,0 +1,19 @@
+spawnstep.mobnodes = {
+	dirtmonster = {
+		node="default:dirt",
+		mob="mobs_monster:dirt_monster",
+	},
+	stonemonster = {
+		node="default:stone",
+		mob="mobs_monster:stone_monster",
+	},
+	dungeonmaster = {
+		node="default:obsidian",
+		mob="mobs_monster:dungeon_master"
+	},
+	bossdm = {
+		node="default:nyancat",
+		mob="mobs_monster:dungeon_master_boss"
+	},
+}
+