Use settings to determine spawn chance, frequency, level, & light requirements

README.md

@@ -14,6 +14,35 @@ An explosive nuisance for [Minetest](http://minetest.net/).
   - Original by Rui: WTFPL
 - tnt_function code: [MIT](tnt_function.lua)
 
+---
+### Usage:
+
+Settings:
+- ***sneeker.spawn_chance***
+  - Sets possibility for spawn.
+	- type: int
+	- default: 10000
+- ***sneeker.spawn_interval***
+  - Sets frequency of spawn chance.
+	- type: int
+	- default: 240 (4 minutes)
+- ***sneeker.spawn_minlight***
+  - Sets the minimum light that a node must have for spawn to occur.
+	- type: int
+	- default: 0
+- ***sneeker.spawn_maxlight***
+  - Sets the maximum light that a node can have for spawn to occur.
+	- type: int
+	- default: 9
+- ***sneeker.spawn_minheight***
+  - Sets the maximum light that a node can have for spawn to occur.
+	- type: int
+	- default: -31000
+- ***sneeker.spawn_maxheight***
+  - Sets the lowest position at which sneeker can spawn.
+	- type: int
+	- default 31000
+
 ---
 ### Links:
 

init.lua

@@ -1,8 +1,17 @@
 
 sneeker = {}
+sneeker.modname = core.get_current_modname()
+sneeker.modpath = core.get_modpath(sneeker.modname)
 
-dofile(minetest.get_modpath("sneeker").."/tnt_function.lua")
-dofile(minetest.get_modpath("sneeker").."/spawn.lua")
+local scripts = {
+	"settings",
+	"tnt_function",
+	"spawn",
+}
+
+for _, script in ipairs(scripts) do
+	dofile(sneeker.modpath .. "/" .. script .. ".lua")
+end
 
 
 local function jump(self, pos, direction)

settings.lua

@@ -0,0 +1,46 @@
+-- Settings for sneeker mod
+
+
+local time_min = 60
+
+--- Sets possibility for spawn.
+--
+--  Inverted value (e.g. 10000 = 1/10000).
+--
+--  @setting sneeker.spawn_chance
+sneeker.spawn_chance = tonumber(core.settings:get("sneeker.spawn_chance") or 10000)
+
+--- Sets frequency of spawn chance.
+--
+--  Default 240 is equivalent to 4 minutes (60 * 4).
+--
+--  @setting sneeker.spawn_interval
+sneeker.spawn_interval = tonumber(core.settings:get("sneeker.spawn_interval") or time_min * 4)
+
+--- Sets the minimum light that a node must have for spawn to occur.
+--
+--  Default: 0
+--
+--  @setting sneeker.spawn_minlight
+sneeker.spawn_minlight = tonumber(core.settings:get("sneeker.spawn_minlight") or 0)
+
+--- Sets the maximum light that a node can have for spawn to occur.
+--
+--  Default: 4
+--
+--  @setting sneeker.spawn_maxlight
+sneeker.spawn_maxlight = tonumber(core.settings:get("sneeker.spawn_maxlight") or 4)
+
+--- Sets the lowest position at which sneeker can spawn.
+--
+--  Default: -31000
+--
+--  @setting sneeker.spawn_minheight
+sneeker.spawn_minheight = tonumber(core.settings:get("sneeker.spawn_minheight") or -31000)
+
+--- Sets the highest position at which sneeker can spawn.
+--
+--  Default: 31000
+--
+--  @setting sneeker.spawn_maxheight
+sneeker.spawn_maxheight = tonumber(core.settings:get("sneeker.spawn_maxheight") or 31000)

settingtypes.txt

@@ -0,0 +1,20 @@
+
+# Sets possibility for spawn.
+#
+# Rate is the inverted value (e.g. 1/value).
+sneeker.spawn_chance (Sneeker spawn chance) int 10000
+
+# Sets frequency of spawn chance. Default 240 is equivalent to 4 minutes (60 * 4).
+sneeker.spawn_interval (Sneeker spawn interval) int 240
+
+# Sets the minimum light that a node must have for spawn to occur.
+sneeker.spawn_minlight (Sneeker min light for spawn) int 0
+
+# Sets the maximum light that a node can have for spawn to occur.
+sneeker.spawn_maxlight (Sneeker max light for spawn) int 4
+
+# Sets the lowest position at which sneeker can spawn.
+sneeker.spawn_minheight (Sneeker min spawn height) int -31000
+
+# Sets the highest position at which sneeker can spawn.
+sneeker.spawn_maxheight (Sneeker max spawn height) int 31000

spawn.lua

@@ -12,32 +12,32 @@ end
 core.register_abm({
 	nodenames = spawn_nodes,
 	neighbors = {"air"},
-	interval = 30,
-	chance = 9000,
+	interval = sneeker.spawn_interval,
+	chance = sneeker.spawn_chance,
 	action = function(pos, node, _, active_object_count_wider)
 		if active_object_count_wider > 5 then
 			return
 		end
-		pos.y = pos.y+1
-		if not core.get_node_light(pos) then
+
+		if pos.y > sneeker.spawn_maxheight then
 			return
 		end
-		if core.get_node_light(pos) > 5 then
+		if pos.y < sneeker.spawn_minheight then
 			return
 		end
-		if core.get_node_light(pos) < -1 then
+
+		-- needs two vertical air nodes to spawn
+		for _, node_pos in ipairs({pos, {x=pos.x, y=pos.y+1, z=pos.z}}) do
+			if core.get_node(node_pos).name ~= "air" then
 				return
 			end
-		if pos.y > 31000 then
-			return
-		end
-		if core.get_node(pos).name ~= "air" then
-			return
-		end
-		pos.y = pos.y+1
-		if core.get_node(pos).name ~= "air" then
+		end
+
+		local llevel = core.get_node_light(pos)
+		if not llevel or llevel > sneeker.spawn_maxlight or llevel < sneeker.spawn_minlight then
 			return
 		end
+
 		core.add_entity(pos, "sneeker:sneeker")
 	end
 })