Cleanup

- sneeker.spawn_minlight
  - Sets the minimum light required for spawn to occur.
- sneeker.spawn_minheight
  - Sets the lowest position at which sneeker can spawn.
- sneeker.spawn_maxheight
  - Sets the highest position at which sneeker can spawn.

CHANGES.txt

@@ -0,0 +1,8 @@
+
+1.0
+- Forked & renamed from Rui's original "creeper" mod.
+- Updated for Minetest 5.x API.
+- Changed to MIT license.
+- Ported to Creatures Revived (cmer) engine.
+- Spawn on more types of nodes.
+- Spawn on "nether:rack" if nether mod available.

LICENSE.md

@@ -1,13 +0,0 @@
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-                    Version 2, December 2004
-
- Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
-
- Everyone is permitted to copy and distribute verbatim or modified
- copies of this license document, and changing it is allowed as long
- as the name is changed.
-
-            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
-  0. You just DO WHAT THE FUCK YOU WANT TO.

LICENSE.txt

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright © 2021 Jordan Irwin (AntumDeluge)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,8 +1,51 @@
-# creeper
-Adds some explosive nuisance.
+## Sneeker mod for Minetest
 
-## Forum Topic
-- https://forum.minetest.net/viewtopic.php?t=11891
+---
+### Description:
 
-## License
-- **Code:** WTFPL
+An explosive nuisance for [Minetest](http://minetest.net/).
+
+![screenshot](screenshot.png)
+
+---
+### Licensing:
+
+- **Code:** [MIT](LICENSE.txt)
+    - Original by Rui: WTFPL
+
+---
+### 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:
+
+- [Original forum thread](https://forum.minetest.net/viewtopic.php?t=11891)
+- [Git repo](https://github.com/AntumMT/mod-sneeker)
+- [Changelog](CHANGES.txt)
+- [TODO](TODO.txt)

TODO.txt

@@ -0,0 +1,5 @@
+
+TODO:
+- fix walk logic to stop before exploding
+- fix sound playthrough
+- remove unused setting "sneeker.spawn_cap"

functions.lua

@@ -0,0 +1,13 @@
+-- Functions for sneeker mod
+
+
+-- Spawns a sneeker entity
+function sneeker.spawn(pos)
+	core.add_entity(pos, sneeker.mob_name)
+	sneeker.log("debug", "Spawned entity \"" .. sneeker.mob_name .. "\" at " .. tostring(pos.x) .. "," .. tostring(pos.y))
+end
+
+-- Retrieves pos coordinates in string value
+function sneeker.get_pos_string(pos)
+	return "x=" .. tostring(pos.x) .. ", y=" .. tostring(pos.y) .. ", z=" .. tostring(pos.z)
+end

init.lua

@@ -1,45 +1,83 @@
-creeper = {}
+
+sneeker = {}
+sneeker.modname = core.get_current_modname()
+sneeker.modpath = core.get_modpath(sneeker.modname)
+
+dofile(sneeker.modpath .. "/settings.lua")
+
+sneeker.log = function(lvl, msg)
+	if lvl == "debug" and not sneeker.debug then return end
+
+	if not msg then
+		msg = lvl
+		lvl = nil
+	end
+
+	msg = "[" .. sneeker.modname .. "] " .. msg
+	if lvl == "debug" then
+		msg = "[DEBUG] " .. msg
+	end
+
+	if not lvl then
+		core.log(msg)
+	else
+		core.log(lvl, msg)
+	end
+end
+
+sneeker.log("debug", "Debugging is on")
+
+
+if core.settings:get_bool("log_mods") then
+	core.log("action", "Loading mod \"" .. sneeker.modname .. "\" ...")
+end
+
+sneeker.mob_name = "sneeker:sneeker"
+local old_spawnegg_name = "sneeker:spawnegg"
+
+local scripts = {
+	"functions",
+	"tnt_function",
+	--"spawn",
+	}
+
+for _, script in ipairs(scripts) do
+	dofile(sneeker.modpath .. "/" .. script .. ".lua")
+end
 
 --[[
--- DISABLED!!!
-do return end
---]]
-
-dofile(minetest.get_modpath("creeper").."/tnt_function.lua")
-dofile(minetest.get_modpath("creeper").."/spawn.lua")
-
-local function jump(self,pos,direction)
+local function jump(self, pos, direction)
 	local velocity = self.object:get_velocity()
-	if minetest.registered_nodes[minetest.get_node(pos).name].climbable then
-		self.object:set_velocity({x=velocity.x,y=4,z=velocity.z})
+	if core.registered_nodes[core.get_node(pos).name].climbable then
+		self.object:set_velocity({x=velocity.x, y=4, z=velocity.z})
 		return
 	end
 
-	local spos = {x=pos.x+direction.x,y=pos.y,z=pos.z+direction.z}
-	local node = minetest.get_node_or_nil(spos)
+	local spos = {x=pos.x+direction.x, y=pos.y, z=pos.z+direction.z}
+	local node = core.get_node_or_nil(spos)
 	spos.y = spos.y+1
-	local node2 = minetest.get_node_or_nil(spos)
-	local def,def2 = {}
+	local node2 = core.get_node_or_nil(spos)
+	local def, def2 = {}
 	if node and node.name then
-		def = minetest.registered_items[node.name]
+		def = core.registered_items[node.name]
 	end
 	if node2 and node2.name then
-		def2 = minetest.registered_items[node2.name]
+		def2 = core.registered_items[node2.name]
 	end
 	if def and def.walkable
 	and def2 and not def2.walkable
 	and def.drawtype ~= "fencelike" then
 		self.object:set_velocity({
-			x=velocity.x*2.2,
-			y=self.jump_height,
-			z=velocity.z*2.2
+			x = velocity.x*2.2,
+			y = self.jump_height,
+			z = velocity.z*2.2
 		})
 	end
 end
 
 local function random_turn(self)
-	if self.turn_timer > math.random(2,5) then
-		local select_turn = math.random(1,3)
+	if self.turn_timer > math.random(2, 5) then
+		local select_turn = math.random(1, 3)
 		if select_turn == 1 then
 			self.turn = "left"
 		elseif select_turn == 2 then
@@ -55,10 +93,10 @@ end
 local def = {
 	hp_max = 20,
 	physical = true,
-	collisionbox = {-0.25,-0.7,-0.25, 0.25,0.8,0.25},
+	collisionbox = {-0.25, -0.7, -0.25, 0.25, 0.8, 0.25},
 	visual = "mesh",
 	mesh = "character.b3d",
-	textures = {"creeper.png"},
+	textures = {"sneeker.png"},
 	makes_footstep_sound = false,
 
 	-- Original
@@ -73,40 +111,145 @@ local def = {
 	animation_speed = 30,
 	knockback_level = 2
 }
+]]
 
-def.on_activate = function(self,staticdata)
+local sneeker_on_activate = function(self, staticdata)
+	--[[
 	self.yaw = 0
 	self.anim = 1
+	]]
 	self.timer = 0
 	self.visualx = 1
+	--[[
 	self.jump_timer = 0
 	self.turn_timer = 0
 	self.turn_speed = 0
+	]]
 	self.powered = false
+	--[[
 	self.knockback = false
-	self.state = math.random(1,2)
+	self.state = math.random(1, 2)
 	self.old_y = self.object:get_pos().y
+	]]
 
-	local data = minetest.deserialize(staticdata)
+	local data = core.deserialize(staticdata)
 	if data and type(data) == "table" then
 		if data.powered == true then
 			self.powered = true
-			self.object:set_properties({textures = {"creeper_powered.png"}})
+			self.object:set_properties({textures = {"sneeker_powered.png"}})
 		end
 	else
-		if math.random(0,20) == 20 then
+		if math.random(0, 20) == 20 then
 			self.powered = true
-			self.object:set_properties({textures = {"creeper_powered.png"}})
+			self.object:set_properties({textures = {"sneeker_powered.png"}})
 		end
 	end
 end
 
-
 local function isnan(n)
 	return tostring(n) == tostring((-1)^.5)
 end
 
-def.on_step = function(self, dtime)
+local sneeker_on_step = function(self, dtime)
+	if self.stunned then return false end
+
+	local pos = self.object:get_pos()
+	local inside = core.get_objects_inside_radius(pos, 10)
+	local velocity = self.object:get_velocity()
+
+	self.timer = self.timer+0.01
+
+	if self.mode == "follow" and self.visualx < 2 then
+		if not self.hiss then
+			core.sound_play("sneeker_hiss", {pos=pos, gain=1.5, max_hear_distance=2*64})
+		end
+		self.visualx = self.visualx+0.05
+		self.object:set_properties({
+			visual_size = {x=self.visualx, y=1}
+		})
+		self.hiss = true
+	elseif self.visualx > 1 then
+		self.visualx = self.visualx-0.05
+		self.object:set_properties({
+			visual_size = {x=self.visualx, y=1}
+		})
+		self.hiss = false
+	end
+
+	for  _, object in ipairs(inside) do
+		if object:is_player() then
+			self.mode = "follow"
+		end
+	end
+
+	if self.mode == "follow" then
+		local inside_2 = core.get_objects_inside_radius(pos, 2)
+
+		-- boom
+		if #inside_2 ~= 0 then
+			for  _, object in ipairs(inside_2) do
+				if object:is_player() and object:get_hp() ~= 0 then
+					if self.visualx >= 2 then
+						self.object:remove()
+						sneeker.boom(pos, self.powered)
+						core.sound_play("sneeker_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
+						return true
+					end
+				end
+			end
+		end
+
+		if #inside > 0 then
+			for  _, object in ipairs(inside) do
+				if object:is_player() and object:get_hp() ~= 0 then
+					if #inside_2 > 0 then
+						for _, object in ipairs(inside_2) do
+							-- Stop move
+							if object:is_player() then
+								--[[
+								if self.anim ~= ANIM_STAND then
+									self.object:set_animation({x=animation.stand_START, y=animation.stand_END}, anim_speed, 0)
+									self.anim = ANIM_STAND
+								end
+								]]
+								--self.object:set_velocity({x=0, y=velocity.y, z=0})
+								return false
+							end
+						end
+					end
+
+					-- follow player
+					local ppos = object:get_pos()
+					self.vec = {x=ppos.x-pos.x, y=ppos.y-pos.y, z=ppos.z-pos.z}
+					self.yaw = math.atan(self.vec.z/self.vec.x)+math.pi^2
+					if ppos.x > pos.x then
+						self.yaw = self.yaw+math.pi
+					end
+					self.yaw = self.yaw-2
+					self.object:set_yaw(self.yaw)
+					self.direction = {x=math.sin(self.yaw)*-1, y=0, z=math.cos(self.yaw)}
+
+					local direction = self.direction
+					local dir_x = direction.x*2.5
+					local dir_y = velocity.y
+					local dir_z = direction.z*2.5
+
+					if not isnan(dir_x) and not isnan(dir_y) and not isnan(dir_z) then
+						self.object:set_velocity({x=direction.x*2.5, y=velocity.y, z=direction.z*2.5})
+					else
+						sneeker.log("warning", "Found NaN")
+						for k, v in ipairs({x=dir_x, y=dir_y, z=dir_z}) do
+							if isnan(v) then
+								sneeker.log("warning", "\"" .. k .. "\" is not a number: " .. tostring(v))
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	--[[
 	if self.knockback then
 		return
 	end
@@ -116,7 +259,7 @@ def.on_step = function(self, dtime)
 
 	local pos = self.object:get_pos()
 	local yaw = self.object:get_yaw()
-	local inside = minetest.get_objects_inside_radius(pos,10)
+	local inside = core.get_objects_inside_radius(pos, 10)
 	local walk_speed = self.walk_speed
 	local animation = self.animation
 	local anim_speed = self.animation_speed
@@ -127,7 +270,7 @@ def.on_step = function(self, dtime)
 	self.jump_timer = self.jump_timer+0.01
 
 	if not self.chase
-	and self.timer > math.random(2,5) then
+	and self.timer > math.random(2, 5) then
 		if math.random() > 0.8 then
 			self.state = "stand"
 		else
@@ -146,24 +289,24 @@ def.on_step = function(self, dtime)
 
 	if self.chase and self.visualx < 2 then
 		if self.hiss == false then
-			minetest.sound_play("creeper_hiss",{pos=pos,gain=1.5,max_hear_distance=2*64})
+			core.sound_play("sneeker_hiss", {pos=pos, gain=1.5, max_hear_distance=2*64})
 		end
 		self.visualx = self.visualx+0.05
 		self.object:set_properties({
-			visual_size = {x=self.visualx,y=1}
+			visual_size = {x=self.visualx, y=1}
 		})
 		self.hiss = true
 	elseif self.visualx > 1 then
 		self.visualx = self.visualx-0.05
 		self.object:set_properties({
-			visual_size = {x=self.visualx,y=1}
+			visual_size = {x=self.visualx, y=1}
 		})
 		self.hiss = false
 	end
 
 	self.chase = false
 
-	for  _,object in ipairs(inside) do
+	for  _, object in ipairs(inside) do
 		if object:is_player() then
 			self.state = "chase"
 		end
@@ -171,7 +314,7 @@ def.on_step = function(self, dtime)
 
 	if self.state == "stand" then
 		if self.anim ~= ANIM_STAND then
-			self.object:set_animation({x=animation.stand_START,y=animation.stand_END},anim_speed,0)
+			self.object:set_animation({x=animation.stand_START, y=animation.stand_END}, anim_speed, 0)
 			self.anim = ANIM_STAND
 		end
 
@@ -179,19 +322,19 @@ def.on_step = function(self, dtime)
 
 		if velocity.x ~= 0
 		or velocity.z ~= 0 then
-			self.object:set_velocity({x=0,y=velocity.y,z=0})
+			self.object:set_velocity({x=0, y=velocity.y, z=0})
 		end
 	end
 
 	if self.state == "walk" then
 		if self.anim ~= ANIM_WALK then
-			self.object:set_animation({x=animation.walk_START,y=animation.walk_END},anim_speed,0)
+			self.object:set_animation({x=animation.walk_START, y=animation.walk_END}, anim_speed, 0)
 			self.anim = ANIM_WALK
 		end
 
-		self.direction = {x=math.sin(yaw)*-1,y=-10,z=math.cos(yaw)}
+		self.direction = {x=math.sin(yaw)*-1, y=-10, z=math.cos(yaw)}
 		if self.direction then
-			self.object:set_velocity({x=self.direction.x*walk_speed,y=velocity.y,z=self.direction.z*walk_speed})
+			self.object:set_velocity({x=self.direction.x*walk_speed, y=velocity.y, z=self.direction.z*walk_speed})
 		end
 
 		random_turn(self)
@@ -200,10 +343,10 @@ def.on_step = function(self, dtime)
 
 		if self.turn_timer > 1 then
 			local direction = self.direction
-			local npos = {x=pos.x+direction.x,y=pos.y+0.2,z=pos.z+direction.z}
+			local npos = {x=pos.x+direction.x, y=pos.y+0.2, z=pos.z+direction.z}
 			if velocity.x == 0 or velocity.z == 0
-			or minetest.registered_nodes[minetest.get_node(npos).name].walkable then
-				local select_turn = math.random(1,2)
+			or core.registered_nodes[core.get_node(npos).name].walkable then
+				local select_turn = math.random(1, 2)
 				if select_turn == 1 then
 					self.turn = "left"
 				elseif select_turn == 2 then
@@ -216,79 +359,67 @@ def.on_step = function(self, dtime)
 
 		-- Jump
 		if self.jump_timer > 0.2 then
-			jump(self,pos,self.direction)
+			jump(self, pos, self.direction)
 		end
 	end
 
 	if self.state == "chase" then
 		if self.anim ~= ANIM_WALK then
-			self.object:set_animation({x=animation.walk_START,y=animation.walk_END},anim_speed,0)
+			self.object:set_animation({x=animation.walk_START, y=animation.walk_END}, anim_speed, 0)
 			self.anim = ANIM_WALK
 		end
 
 		self.turn = "straight"
 
-		local inside_2 = minetest.get_objects_inside_radius(pos,2)
+		local inside_2 = core.get_objects_inside_radius(pos, 2)
 
 		-- Boom
 		if #inside_2 ~= 0 then
-			for  _,object in ipairs(inside_2) do
+			for  _, object in ipairs(inside_2) do
 				if object:is_player() and object:get_hp() ~= 0 then
 					self.chase = true
 					if self.visualx >= 2 then
 						self.object:remove()
-						creeper.boom(pos,self.powered)
-						minetest.sound_play("creeper_explode",{pos=pos,gain=1.5,max_hear_distance=2*64})
+						sneeker.boom(pos, self.powered)
+						core.sound_play("sneeker_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
 					end
 				end
 			end
 		end
 
 		if #inside ~= 0 then
-			for  _,object in ipairs(inside) do
+			for  _, object in ipairs(inside) do
 				if object:is_player() and object:get_hp() ~= 0 then
 					if #inside_2 ~= 0 then
-						for _,object in ipairs(inside_2) do
+						for _, object in ipairs(inside_2) do
 							-- Stop move
 							if object:is_player() then
 								if self.anim ~= ANIM_STAND then
-									self.object:set_animation({x=animation.stand_START,y=animation.stand_END},anim_speed,0)
+									self.object:set_animation({x=animation.stand_START, y=animation.stand_END}, anim_speed, 0)
 									self.anim = ANIM_STAND
 								end
-								self.object:set_velocity({x=0,y=velocity.y,z=0})
+								self.object:set_velocity({x=0, y=velocity.y, z=0})
 								return
 							end
 						end
 					end
 
 					local ppos = object:get_pos()
-					self.vec = {x=ppos.x-pos.x,y=ppos.y-pos.y,z=ppos.z-pos.z}
+					self.vec = {x=ppos.x-pos.x, y=ppos.y-pos.y, z=ppos.z-pos.z}
 					self.yaw = math.atan(self.vec.z/self.vec.x)+math.pi^2
 					if ppos.x > pos.x then
 						self.yaw = self.yaw+math.pi
 					end
 					self.yaw = self.yaw-2
 					self.object:set_yaw(self.yaw)
-					self.direction = {x=math.sin(self.yaw)*-1,y=0,z=math.cos(self.yaw)}
+					self.direction = {x=math.sin(self.yaw)*-1, y=0, z=math.cos(self.yaw)}
 
 					local direction = self.direction
-
-					-- FIXME: hack
-					local can_set = true
-					for _, c in ipairs({direction.x*2.5, direction.z*2.5}) do
-						if isnan(c) then
-							can_set = false
-							break
-						end
-					end
-
-					if can_set then
-						self.object:set_velocity({x=direction.x*2.5,y=velocity.y,z=direction.z*2.5})
-					end
+					self.object:set_velocity({x=direction.x*2.5, y=velocity.y, z=direction.z*2.5})
 
 					-- Jump
 					if self.jump_timer > 0.2 then
-						jump(self,pos,direction)
+						jump(self, pos, direction)
 					end
 				end
 			end
@@ -298,63 +429,132 @@ def.on_step = function(self, dtime)
 	end
 
 	-- Swim
-	local node = minetest.get_node(pos)
-	if minetest.get_item_group(node.name,"water") ~= 0 then
-		self.object:set_acceleration({x=0,y=1,z=0})
+	local node = core.get_node(pos)
+	if core.get_item_group(node.name, "water") ~= 0 then
+		self.object:set_acceleration({x=0, y=1, z=0})
 		local velocity = self.object:get_velocity()
 		if self.object:get_velocity().y > 5 then
-			self.object:set_velocity({x=0,y=velocity.y-velocity.y/2,z=0})
+			self.object:set_velocity({x=0, y=velocity.y-velocity.y/2, z=0})
 		else
-			self.object:set_velocity({x=0,y=velocity.y+1,z=0})
+			self.object:set_velocity({x=0, y=velocity.y+1, z=0})
 		end
 	else
-		self.object:set_acceleration({x=0,y=-10,z=0})
+		self.object:set_acceleration({x=0, y=-10, z=0})
 	end
+	]]
 end
 
-def.on_punch = function(self,puncher,time_from_last_punch,tool_capabilities,dir)
+--[[
+def.on_punch = function(self, puncher, time_from_last_punch, tool_capabilities, dir)
 	if self.knockback == false then
 		local knockback_level = self.knockback_level
-		self.object:set_velocity({x=dir.x*knockback_level,y=3,z=dir.z*knockback_level})
+		self.object:set_velocity({x=dir.x*knockback_level, y=3, z=dir.z*knockback_level})
 		self.knockback = true
-		minetest.after(0.6,function()
+		core.after(0.6, function()
 			self.knockback = false
 		end)
 	end
 	if self.object:get_hp() < 1 then
 		local pos = self.object:get_pos()
-		local x = 1/math.random(1,5)*dir.x
-		local z = 1/math.random(1,5)*dir.z
-		local p = {x=pos.x+x,y=pos.y,z=pos.z+z}
-		local node = minetest.get_node_or_nil(p)
+		local x = 1/math.random(1, 5)*dir.x
+		local z = 1/math.random(1, 5)*dir.z
+		local p = {x=pos.x+x, y=pos.y, z=pos.z+z}
+		local node = core.get_node_or_nil(p)
 		if node == nil or not node.name or node.name ~= "air" then
 			p = pos
 		end
-		local obj = minetest.add_item(p, {name="tnt:gunpowder",count=math.random(0,2)})
+		local obj = core.add_item(p, {name="tnt:gunpowder", count=math.random(0, 2)})
 	end
 end
+]]
 
-def.get_staticdata = function(self)
-	return minetest.serialize({
+local sneeker_get_staticdata = function(self)
+	return core.serialize({
 		powered = self.powered
 	})
 end
 
-minetest.register_entity("creeper:creeper",def)
+--core.register_entity(sneeker.mob_name, def)
 
-minetest.register_craftitem("creeper:spawnegg",{
-	description = "Creeper Spawn Egg",
-	inventory_image = "creeper_spawnegg.png",
-	stack_max = 64,
-	on_place = function(itemstack,placer,pointed_thing)
-		if pointed_thing.type == "node" then
-			local pos = pointed_thing.above
-			pos.y = pos.y+1
-			minetest.add_entity(pos,"creeper:creeper")
-			if not minetest.setting_getbool("creative_mode") then
-				itemstack:take_item()
-			end
-			return itemstack
-		end
-	end
+
+local spawn_nodes = {
+	"default:dirt",
+	"default:dirt_with_grass",
+	"default:dry_dirt_with_dry_grass",
+	"default:desert_sand",
+	"default:sand",
+	"default:stone",
+	"default:desert_stone",
+}
+
+if core.global_exists("nether") then
+	table.insert(spawn_nodes, "nether:rack")
+end
+
+local drops = nil
+if core.global_exists("tnt") then
+	drops = {
+		{"tnt:gunpowder", {min=1, max=2}, chance=0.66},
+	}
+end
+
+
+cmer.register_mob({
+	name = sneeker.mob_name,
+	stats = {
+		hp = 20,
+		lifetime = 15 * 60, -- 15 minutes
+		can_jump = 5,
+		has_kockback = true,
+		sneaky = true,
+	},
+	modes = {
+		idle = {chance=0.3, moving_speed=0,},
+		walk = {chance=0.7, moving_speed=1.5,},
+		follow = {chance=0.0, moving_speed=1.5,},
+		inflate = {chance=0.0, moving_speed=0,},
+	},
+	model = {
+		mesh = "character.b3d",
+		textures = {"sneeker.png"},
+		collisionbox = {-0.25, -0.7, -0.25, 0.25, 0.8, 0.25},
+		rotation = 270.0,
+		animations = {
+			idle = {start=0, stop=79, speed=30,},
+			walk = {start=168, stop=187, speed=30,},
+			follow = {start=168, stop=187, speed=30,},
+			inflate = {start=0, stop=79, speed=30,},
+		},
+	},
+	sounds = {},
+	drops = drops,
+	spawning = {
+		abm_nodes = {
+			spawn_on = spawn_nodes,
+		},
+		abm_interval = sneeker.spawn_interval,
+		abm_chance = sneeker.spawn_chance,
+		max_number = 1,
+		number = 1,
+		time_range = {min=0, max=23999},
+		light = {min=sneeker.spawn_minlight, max=sneeker.spawn_maxlight},
+		height_limit = {min=sneeker.spawn_minheight, max=sneeker.spawn_maxheight},
+	},
+	on_step = sneeker_on_step,
+	on_activate = sneeker_on_activate,
+	get_staticdata = sneeker_get_staticdata,
 })
+
+if core.global_exists("asm") then
+	asm.addEgg({
+		name = "sneeker",
+		inventory_image = "sneeker_spawnegg.png",
+		spawn = "sneeker:sneeker",
+	})
+
+	core.register_alias(old_spawnegg_name, "spawneggs:sneeker")
+
+	if core.registered_items["tnt:tnt"] then
+		asm.addEggRecipe("sneeker", "tnt:tnt")
+	end
+end

mod.conf

@@ -1,5 +1,6 @@
-name = creeper
-title = Creeper
-description = Adds some explosive nuisance.
+name = sneeker
+title = Sneeker
+description = An explosive nuisance.
 author = Rui
-depends = default, tnt
+depends = cmer, default, tnt
+optional_depends = asm_spawneggs, nether

settings.lua

@@ -0,0 +1,53 @@
+-- Settings for sneeker mod
+
+
+sneeker.time_min = 60
+
+sneeker.debug = core.settings:get_bool("enable_debug_mods", false)
+
+--- Sets maximum number of spawns that can exist in world at one time.
+--
+--  @setting sneeker.spawn_cap
+sneeker.spawn_cap = tonumber(core.settings:get("sneeker.spawn_cap")) or 10
+
+--- 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 sneeker.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: 9
+--
+--  @setting sneeker.spawn_maxlight
+sneeker.spawn_maxlight = tonumber(core.settings:get("sneeker.spawn_maxlight")) or 9
+
+--- 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 +1,23 @@
+# Sets maximum number of spawns that can exist in world.
+sneeker.spawn_cap (Sneeker maximum spawns) int 10
+
+# Sets possibility for spawn.
+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 9
+
+# 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
+
+# Logs extra debug messages.
+enable_debug_mods (Enable debugging messages) bool false

spawn.lua

@@ -1,32 +1,84 @@
-minetest.register_abm({
-	nodenames = {"default:dirt_with_grass","default:stone"},
+
+local time_hr = sneeker.time_min * 60
+local time_day = time_hr * 24
+
+-- Display spawn chance as percentage in log
+local spawn_chance_percent = math.floor(1 / sneeker.spawn_chance * 100)
+if spawn_chance_percent < 1 then
+	spawn_chance_percent = "Less than 1%"
+else
+	spawn_chance_percent = tostring(spawn_chance_percent) .. "%"
+end
+
+sneeker.log("Spawn cap: " .. tostring(sneeker.spawn_cap))
+sneeker.log("Spawn chance: " .. spawn_chance_percent)
+sneeker.log("Spawn interval: " .. tostring(sneeker.spawn_interval) .. " (" .. tostring(sneeker.spawn_interval/60) .. " minute(s))")
+sneeker.log("Maximum light value for spawn: " .. tostring(sneeker.spawn_maxlight))
+
+local spawn_nodes = {"default:dirt_with_grass", "default:stone"}
+if core.global_exists("nether") then
+	table.insert(spawn_nodes, "nether:rack")
+end
+
+core.register_abm({
+	nodenames = spawn_nodes,
 	neighbors = {"air"},
-	interval = 30,
-	chance = 9000,
+	interval = spawn_interval,
+	chance = spawn_chance,
 	action = function(pos, node, _, active_object_count_wider)
 		if active_object_count_wider > 5 then
 			return
 		end
+
+		-- Check light value of node
 		pos.y = pos.y+1
-		if not minetest.get_node_light(pos) then
+		local node_light = core.get_node_light(pos)
+
+		-- Debugging spawning
+		sneeker.log("debug", "Node light level at " .. sneeker.get_pos_string(pos) .. ": " .. tostring(node_light))
+
+		-- Node light level
+		if not node_light or node_light > spawn_maxlight then
+			sneeker.log("debug", "Node not dark enough for spawn")
+			return
+		elseif node_light < spawn_minlight then
+			sneeker.log("debug", "Node too dark for spawn")
 			return
 		end
-		if minetest.get_node_light(pos) > 5 then
+
+		-- Spawn range
+		if spawn_minheight ~= nil and pos.y < spawn_minheight then
+			sneeker.log("debug", "Position is too low for spawn")
+			return
+		elseif pos.y > spawn_maxheight then
+			sneeker.log("debug", "Position is too high for spawn")
 			return
 		end
-		if minetest.get_node_light(pos) < -1 then
-			return
-		end
-		if pos.y > 31000 then
-			return
-		end
-		if minetest.get_node(pos).name ~= "air" then
+
+		-- Node must be touching air
+		if core.get_node(pos).name ~= "air" then
 			return
 		end
 		pos.y = pos.y+1
-		if minetest.get_node(pos).name ~= "air" then
+		if core.get_node(pos).name ~= "air" then
 			return
 		end
-		minetest.add_entity(pos,"creeper:creeper")
+
+		-- Get total count of sneekers in world
+		local count = 0
+		for I in pairs(core.luaentities) do
+		    if core.luaentities[I].name == sneeker.mob_name then
+		        count = count + 1
+		    end
+		end
+
+		sneeker.log("debug", "Current active spawns: " .. tostring(count) .. "/" .. tostring(spawn_cap))
+
+		if count >= spawn_cap then
+			sneeker.log("debug", "Max spawns reached")
+			return
+		end
+
+		sneeker.spawn(pos)
 	end
 })

tnt_function.lua

@@ -1,14 +1,15 @@
+
 -- From TNT
 local cid_data = {}
-local radius = tonumber(minetest.setting_get("tnt_radius") or 3)
+local radius = tonumber(core.settings:get("tnt_radius") or 3)
 local large_radius = 5
 local loss_prob = {
 	["default:cobble"] = 3,
 	["default:dirt"] = 4,
 }
-minetest.after(0, function()
-	for name, def in pairs(minetest.registered_nodes) do
-		cid_data[minetest.get_content_id(name)] = {
+core.after(0, function()
+	for name, def in pairs(core.registered_nodes) do
+		cid_data[core.get_content_id(name)] = {
 			name = name,
 			drops = def.drops,
 			flammable = def.groups.flammable,
@@ -34,7 +35,7 @@ local function eject_drops(drops, pos, radius)
 				item:set_count(count)
 			end
 			rand_pos(pos, drop_pos, radius)
-			local obj = minetest.add_item(drop_pos, item)
+			local obj = core.add_item(drop_pos, item)
 			if obj then
 				obj:get_luaentity().collect = true
 				obj:set_acceleration({x=0, y=-10, z=0})
@@ -62,7 +63,7 @@ local function add_drop(drops, item)
 end
 
 local function destroy(drops, pos, cid)
-	if minetest.is_protected(pos, "") then
+	if core.is_protected(pos, "") then
 		return
 	end
 	local def = cid_data[cid]
@@ -70,9 +71,9 @@ local function destroy(drops, pos, cid)
 		def.on_blast(vector.new(pos), 1)
 		return
 	end
-	minetest.remove_node(pos)
+	core.remove_node(pos)
 	if def then
-		local node_drops = minetest.get_node_drops(def.name, "")
+		local node_drops = core.get_node_drops(def.name, "")
 		for _, item in ipairs(node_drops) do
 			add_drop(drops, item)
 		end
@@ -98,7 +99,7 @@ end
 local function entity_physics(pos, radius)
 	-- Make the damage radius larger than the destruction radius
 	radius = radius * 2
-	local objs = minetest.get_objects_inside_radius(pos, radius)
+	local objs = core.get_objects_inside_radius(pos, radius)
 	for _, obj in pairs(objs) do
 		local obj_pos = obj:get_pos()
 		local obj_vel = obj:get_velocity()
@@ -115,7 +116,7 @@ local function entity_physics(pos, radius)
 end
 
 local function add_effects(pos, radius)
-	minetest.add_particlespawner({
+	core.add_particlespawner({
 		amount = 128,
 		time = 1,
 		minpos = vector.subtract(pos, radius / 2),
@@ -128,7 +129,7 @@ local function add_effects(pos, radius)
 		maxexptime = 3,
 		minsize = 8,
 		maxsize = 16,
-		texture = "creeper_smoke.png",
+		texture = "sneeker_smoke.png",
 	})
 end
 
@@ -146,16 +147,16 @@ local function explode(pos, radius)
 	local drops = {}
 	local p = {}
 
-	local c_air = minetest.get_content_id("air")
+	local c_air = core.get_content_id("air")
 	local c_tnt = nil
-	if minetest.settings:get_bool("enable_tnt", false) then
-		c_tnt = minetest.get_content_id("tnt:tnt")
+	if core.settings:get_bool("enable_tnt", false) then
+		c_tnt = core.get_content_id("tnt:tnt")
 	end
 
-	local c_tnt_burning = minetest.get_content_id("tnt:tnt_burning")
-	local c_gunpowder = minetest.get_content_id("tnt:gunpowder")
-	local c_gunpowder_burning = minetest.get_content_id("tnt:gunpowder_burning")
-	local c_boom = minetest.get_content_id("tnt:boom")
+	local c_tnt_burning = core.get_content_id("tnt:tnt_burning")
+	local c_gunpowder = core.get_content_id("tnt:gunpowder")
+	local c_gunpowder_burning = core.get_content_id("tnt:gunpowder_burning")
+	local c_boom = core.get_content_id("tnt:boom")
 
 	for z = -radius, radius do
 	for y = -radius, radius do
@@ -184,14 +185,14 @@ local function explode(pos, radius)
 	return drops
 end
 
-function creeper.boom(pos,large)
+function sneeker.boom(pos, large)
 	local radius = radius
 	if large then
 		radius = large_radius
 	end
-	minetest.sound_play("creeper_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
-	minetest.set_node(pos, {name="tnt:boom"})
-	minetest.get_node_timer(pos):start(0.5)
+	core.sound_play("sneeker_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
+	core.set_node(pos, {name="tnt:boom"})
+	core.get_node_timer(pos):start(0.5)
 	local drops = explode(pos, radius)
 	entity_physics(pos, radius)
 	eject_drops(drops, pos, radius)