Add TNT mod

mods/tnt/README.txt

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+=== TNT-MOD for MINETEST-C55 ===
+by PilzAdam
+
+Introduction:
+This mod adds TNT to Minetest. TNT is a tool to help the player
+in mining.
+
+How to install:
+Unzip the archive an place it in minetest-base-directory/mods/minetest/
+if you have a windows client or a linux run-in-place client. If you have
+a linux system-wide instalation place it in ~/.minetest/mods/minetest/.
+If you want to install this mod only in one world create the folder
+worldmods/ in your worlddirectory.
+For further information or help see:
+http://wiki.minetest.com/wiki/Installing_Mods
+
+How to use the mod:
+Craft gunpowder by placing coal and gravel in the crafting area. The
+gunpowder can be used to craft TNT or as fuze for TNT. To craft TNT
+surround gunpowder with 4 wood in a + shape.
+There are different ways to blow up TNT:
+1. Hit it with a torch.
+2. Hit a gunpowder fuze that leads to a TNT block with a torch.
+3. Activate it with mesecons (fastest way)
+Be aware of the damage radius of 7 blocks!
+
+License:
+WTFPL (see below)
+
+See also:
+http://minetest.net/
+
+         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.

mods/tnt/depends.txt

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+default
+fire

mods/tnt/init.lua

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+local destroy = function(pos)
+	if math.random(1,5) <= 4 then
+		minetest.env:add_entity({x=pos.x+math.random(0,10)/10-0.5, y=pos.y, z=pos.z+math.random(0,10)/10-0.5}, "tnt:smoke")
+	end
+	local nodename = minetest.env:get_node(pos).name
+	if nodename ~= "air" then
+		minetest.env:remove_node(pos)
+		if minetest.registered_nodes[nodename].groups.flammable ~= nil then
+			minetest.env:set_node(pos, {name="fire:basic_flame"})
+			return
+		end
+		local drop
+		if not minetest.get_modpath("item_drop") then
+			drop = minetest.get_node_drops(nodename, "")
+		else
+			drop = minetest.get_drops(nodename, "")
+		end
+		for _,item in ipairs(drop) do
+			if type(item) == "string" then
+				local obj = minetest.env:add_item(pos, item)
+				if obj == nil then
+					return
+				end
+				obj:get_luaentity().collect = true
+				obj:setacceleration({x=0, y=-10, z=0})
+				obj:setvelocity({x=math.random(0,6)-3, y=10, z=math.random(0,6)-3})
+			else
+				for i=1,item:get_count() do
+					local obj = minetest.env:add_item(pos, item:get_name())
+					if obj == nil then
+						return
+					end
+					obj:get_luaentity().collect = true
+					obj:setacceleration({x=0, y=-10, z=0})
+					obj:setvelocity({x=math.random(0,6)-3, y=10, z=math.random(0,6)-3})
+				end
+			end
+		end
+	end
+end
+
+boom = function(pos, time)
+	minetest.after(time, function(pos)
+		if minetest.env:get_node(pos).name ~= "tnt:tnt_burning" then
+			return
+		end
+		minetest.sound_play("tnt_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
+		minetest.env:set_node(pos, {name="tnt:boom"})
+		minetest.after(0.5, function(pos)
+			minetest.env:remove_node(pos)
+		end, {x=pos.x, y=pos.y, z=pos.z})
+		
+		local objects = minetest.env:get_objects_inside_radius(pos, 7)
+		for _,obj in ipairs(objects) do
+			if obj:is_player() or obj:get_luaentity().name ~= "__builtin:item" then
+				local obj_p = obj:getpos()
+				local vec = {x=obj_p.x-pos.x, y=obj_p.y-pos.y, z=obj_p.z-pos.z}
+				local dist = (vec.x^2+vec.y^2+vec.z^2)^0.5
+				local damage = (80*0.5^dist)*2
+				obj:set_hp(obj:get_hp()-damage)
+				--[[obj:punch(obj, 1.0, { FIXME
+					full_punch_interval=1.0,
+					groupcaps={
+						fleshy={times={[1]=1/damage, [2]=1/damage, [3]=1/damage}},
+						snappy={times={[1]=1/damage, [2]=1/damage, [3]=1/damage}},
+					}
+				}, nil)]]
+			end
+		end
+		
+		for dx=-2,2 do
+			for dz=-2,2 do
+				for dy=-2,2 do
+					pos.x = pos.x+dx
+					pos.y = pos.y+dy
+					pos.z = pos.z+dz
+					
+					local node =  minetest.env:get_node(pos)
+					if node.name == "tnt:tnt" or node.name == "tnt:tnt_burning" then
+						minetest.env:set_node(pos, {name="tnt:tnt_burning"})
+						boom({x=pos.x, y=pos.y, z=pos.z}, 0)
+					elseif node.name == "fire:basic_flame" or string.find(node.name, "default:water_") or string.find(node.name, "default:lava_") or node.name == "tnt:boom" then
+						
+					else
+						if math.abs(dx)<2 and math.abs(dy)<2 and math.abs(dz)<2 then
+							destroy(pos)
+						else
+							if math.random(1,5) <= 4 then
+								destroy(pos)
+							end
+						end
+					end
+					
+					pos.x = pos.x-dx
+					pos.y = pos.y-dy
+					pos.z = pos.z-dz
+				end
+			end
+		end
+	end, pos)
+end
+
+minetest.register_node("tnt:tnt", {
+	description = "TNT",
+	tiles = {"tnt_top.png", "tnt_bottom.png", "tnt_side.png"},
+	groups = {dig_immediate=2, mesecon=2},
+	sounds = default.node_sound_wood_defaults(),
+	
+	on_punch = function(pos, node, puncher)
+		if puncher:get_wielded_item():get_name() == "default:torch" then
+			minetest.sound_play("tnt_ignite", {pos=pos})
+			minetest.env:set_node(pos, {name="tnt:tnt_burning"})
+			boom(pos, 4)
+		end
+	end,
+})
+
+minetest.register_node("tnt:tnt_burning", {
+	--tiles = {"tnt_top_burning.png", "tnt_bottom.png", "tnt_side.png"},
+	tiles = {{name="tnt_top_burning_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=1}}, "tnt_bottom.png", "tnt_side.png"},
+	light_source = 5,
+	drop = "",
+	sounds = default.node_sound_wood_defaults(),
+})
+
+minetest.register_node("tnt:boom", {
+	drawtype = "plantlike",
+	tiles = {"tnt_boom.png"},
+	light_source = LIGHT_MAX,
+	walkable = false,
+})
+
+burn = function(pos)
+	if minetest.env:get_node(pos).name == "tnt:tnt" then
+		minetest.sound_play("tnt_ignite", {pos=pos})
+		minetest.env:set_node(pos, {name="tnt:tnt_burning"})
+		boom(pos, 1)
+		return
+	end
+	if minetest.env:get_node(pos).name ~= "tnt:gunpowder" then
+		return
+	end
+	minetest.sound_play("tnt_gunpowder_burning", {pos=pos, gain=2})
+	minetest.env:set_node(pos, {name="tnt:gunpowder_burning"})
+	
+	minetest.after(1, function(pos)
+		if minetest.env:get_node(pos).name ~= "tnt:gunpowder_burning" then
+			return
+		end
+		minetest.after(0.5, function(pos)
+			minetest.env:remove_node(pos)
+		end, {x=pos.x, y=pos.y, z=pos.z})
+		for dx=-1,1 do
+			for dz=-1,1 do
+				for dy=-1,1 do
+					pos.x = pos.x+dx
+					pos.y = pos.y+dy
+					pos.z = pos.z+dz
+					
+					if not (math.abs(dx) == 1 and math.abs(dz) == 1) then
+						if dy == 0 then
+							burn({x=pos.x, y=pos.y, z=pos.z})
+						else
+							if math.abs(dx) == 1 or math.abs(dz) == 1 then
+								burn({x=pos.x, y=pos.y, z=pos.z})
+							end
+						end
+					end
+					
+					pos.x = pos.x-dx
+					pos.y = pos.y-dy
+					pos.z = pos.z-dz
+				end
+			end
+		end
+	end, pos)
+end
+
+minetest.register_node("tnt:gunpowder", {
+	description = "Gun Powder",
+	drawtype = "raillike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	tiles = {"tnt_gunpowder.png",},
+	inventory_image = "tnt_gunpowder_inventory.png",
+	wield_image = "tnt_gunpowder_inventory.png",
+	selection_box = {
+		type = "fixed",
+		fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+	},
+	groups = {dig_immediate=2},
+	sounds = default.node_sound_leaves_defaults(),
+	
+	on_punch = function(pos, node, puncher)
+		if puncher:get_wielded_item():get_name() == "default:torch" then
+			burn(pos)
+		end
+	end,
+})
+
+minetest.register_node("tnt:gunpowder_burning", {
+	drawtype = "raillike",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	light_source = 5,
+	--tiles = {"tnt_gunpowder_burning.png"},
+	tiles = {{name="tnt_gunpowder_burning_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=1}}},
+	selection_box = {
+		type = "fixed",
+		fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+	},
+	drop = "",
+	groups = {dig_immediate=2},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+minetest.register_abm({
+	nodenames = {"tnt:tnt", "tnt:gunpowder"},
+	neighbors = {"fire:basic_flame"},
+	interval = 2,
+	chance = 10,
+	action = function(pos, node)
+		if node.name == "tnt:tnt" then
+			minetest.env:set_node(pos, {name="tnt:tnt_burning"})
+			boom({x=pos.x, y=pos.y, z=pos.z}, 0)
+		else
+			burn(pos)
+		end
+	end
+})
+
+minetest.register_craft({
+	output = "tnt:gunpowder",
+	type = "shapeless",
+	recipe = {"default:coal_lump", "default:gravel"}
+})
+
+minetest.register_craft({
+	output = "tnt:tnt",
+	recipe = {
+		{"", "default:wood", ""},
+		{"default:wood", "tnt:gunpowder", "default:wood"},
+		{"", "default:wood", ""}
+	}
+})
+
+minetest.register_entity("tnt:smoke", {
+	physical = true,
+	visual = "sprite",
+	textures = {"tnt_smoke.png"},
+	collisionbox = {0,0,0,0,0,0},
+	
+	timer = 0,
+	time = 5,
+	
+	on_activate = function(self, staticdata)
+		self.object:setacceleration({x=math.random(0,10)/10-0.5, y=5, z=math.random(0,10)/10-0.5})
+		self.time = math.random(1, 10)/10
+	end,
+	
+	on_step = function(self, dtime)
+		self.timer = self.timer+dtime
+		if self.timer > self.time then
+			self.object:remove()
+		end
+	end,
+})
+
+if minetest.get_modpath("mesecons") ~= nil then
+	minetest.after(0, function()
+		
+		--mesecon:add_rules("tnt_above", {{x=0,y=1,z=0}}) FIXME
+		mesecon:register_effector("tnt:tnt", "tnt:tnt") --, mesecon:get_rules("tnt_above"))
+		
+		mesecon:register_on_signal_on(function(pos, node)
+			if node.name == "tnt:tnt" then
+				minetest.env:set_node(pos, {name="tnt:tnt_burning"})
+				boom(pos, 0)
+			end
+		end)
+		
+	end)
+end