Prevent divide by zero (#2106)

This forces all explosions to damage entities within the 1 node
range. If that needs to be disabled, the damage_radius needs to
be set to 0.

README.txt

@@ -9,8 +9,8 @@ ShadowNinja (MIT)
 sofar (sofar@foo-projects.org) (MIT)
 Various Minetest developers and contributors (MIT)
 
-Authors of media
+Authors of media (textures)
-----------------
+---------------------------
 BlockMen (CC BY-SA 3.0):
 All textures not mentioned below.
 
@@ -23,52 +23,22 @@ All gunpowder textures except tnt_gunpowder_inventory.png.
 sofar (sofar@foo-projects.org) (CC BY-SA 3.0):
 tnt_blast.png
 
-paramat (CC BY-SA 3.0)
-tnt_tnt_stick.png - Derived from a texture by benrob0329.
-
-TumeniNodes (CC0 1.0)
-tnt_explode.ogg
-renamed, edited, and converted to .ogg from Explosion2.wav
-by steveygos93 (CC0 1.0)
-<https://freesound.org/s/80401/>
-
-tnt_ignite.ogg
-renamed, edited, and converted to .ogg from sparkler_fuse_nm.wav
-by theneedle.tv (CC0 1.0)
-<https://freesound.org/s/316682/>
-
-tnt_gunpowder_burning.ogg
-renamed, edited, and converted to .ogg from road flare ignite burns.wav
-by frankelmedico (CC0 1.0)
-<https://freesound.org/s/348767/>
-
-
 Introduction
 ------------
 This mod adds TNT to Minetest. TNT is a tool to help the player
 in mining.
 
 How to use the mod:
-
 Craft gunpowder by placing coal and gravel in the crafting area.
-The gunpowder can be used to craft TNT sticks or as a fuse trail for TNT.
+The gunpowder can be used to craft TNT or as fuse for TNT.
+To craft TNT place items like this:
+-- wood - gunpowder -- wood -
+gunpowder gunpowder gunpowder
+-- wood - gunpowder -- wood -
 
-To craft 2 TNT sticks:
+There are different ways to blow up TNT:
-G_G
-GPG
-G_G
-G = gunpowder
-P = paper
-The sticks are not usable as an explosive.
-
-Craft TNT from 9 TNT sticks.
-
-There are different ways to ignite TNT:
   1. Hit it with a torch.
-  2. Hit a gunpowder fuse trail that leads to TNT with a torch or
+  2. Hit a gunpowder fuse that leads to a TNT block with a torch or flint-and-steel.
-     flint-and-steel.
   3. Activate it with mesecons (fastest way).
 
-For 1 TNT:
+Be aware of the damage radius of 6 blocks!
-Node destruction radius is 3 nodes.
-Player and object damage radius is 6 nodes.

depends.txt

@@ -0,0 +1,3 @@
+default
+fire
+

init.lua

@@ -1,11 +1,5 @@
--- tnt/init.lua
-
 tnt = {}
 
--- Load support for MT game translation.
-local S = minetest.get_translator("tnt")
-
-
 -- Default to enabled when in singleplayer
 local enable_tnt = minetest.settings:get_bool("enable_tnt")
 if enable_tnt == nil then
@@ -64,8 +58,8 @@ local function eject_drops(drops, pos, radius)
 			local obj = minetest.add_item(drop_pos, dropitem)
 			if obj then
 				obj:get_luaentity().collect = true
-				obj:set_acceleration({x = 0, y = -10, z = 0})
+				obj:setacceleration({x = 0, y = -10, z = 0})
-				obj:set_velocity({x = math.random(-3, 3),
+				obj:setvelocity({x = math.random(-3, 3),
 						y = math.random(0, 10),
 						z = math.random(-3, 3)})
 			end
@@ -158,51 +152,48 @@ end
 local function entity_physics(pos, radius, drops)
 	local objs = minetest.get_objects_inside_radius(pos, radius)
 	for _, obj in pairs(objs) do
-		local obj_pos = obj:get_pos()
+		local obj_pos = obj:getpos()
 		local dist = math.max(1, vector.distance(pos, obj_pos))
 
 		local damage = (4 / dist) * radius
 		if obj:is_player() then
-			-- we knock the player back 1.0 node, and slightly upwards
+			-- currently the engine has no method to set
-			-- TODO: switch to add_player_velocity() introduced in 5.1
+			-- player velocity. See #2960
+			-- instead, we knock the player back 1.0 node, and slightly upwards
 			local dir = vector.normalize(vector.subtract(obj_pos, pos))
 			local moveoff = vector.multiply(dir, dist + 1.0)
 			local newpos = vector.add(pos, moveoff)
 			newpos = vector.add(newpos, {x = 0, y = 0.2, z = 0})
-			obj:set_pos(newpos)
+			obj:setpos(newpos)
 
 			obj:set_hp(obj:get_hp() - damage)
 		else
+			local do_damage = true
+			local do_knockback = true
+			local entity_drops = {}
 			local luaobj = obj:get_luaentity()
+			local objdef = minetest.registered_entities[luaobj.name]
 
-			-- object might have disappeared somehow
+			if objdef and objdef.on_blast then
-			if luaobj then
+				do_damage, do_knockback, entity_drops = objdef.on_blast(luaobj, damage)
-				local do_damage = true
+			end
-				local do_knockback = true
-				local entity_drops = {}
-				local objdef = minetest.registered_entities[luaobj.name]
 
-				if objdef and objdef.on_blast then
+			if do_knockback then
-					do_damage, do_knockback, entity_drops = objdef.on_blast(luaobj, damage)
+				local obj_vel = obj:getvelocity()
-				end
+				obj:setvelocity(calc_velocity(pos, obj_pos,
-
+						obj_vel, radius * 10))
-				if do_knockback then
+			end
-					local obj_vel = obj:get_velocity()
+			if do_damage then
-					obj:set_velocity(calc_velocity(pos, obj_pos,
+				if not obj:get_armor_groups().immortal then
-							obj_vel, radius * 10))
+					obj:punch(obj, 1.0, {
-				end
+						full_punch_interval = 1.0,
-				if do_damage then
+						damage_groups = {fleshy = damage},
-					if not obj:get_armor_groups().immortal then
+					}, nil)
-						obj:punch(obj, 1.0, {
-							full_punch_interval = 1.0,
-							damage_groups = {fleshy = damage},
-						}, nil)
-					end
-				end
-				for _, item in pairs(entity_drops) do
-					add_drop(drops, item)
 				end
 			end
+			for _, item in pairs(entity_drops) do
+				add_drop(drops, item)
+			end
 		end
 	end
 end
@@ -277,7 +268,7 @@ function tnt.burn(pos, nodename)
 		def.on_ignite(pos)
 	elseif minetest.get_item_group(name, "tnt") > 0 then
 		minetest.swap_node(pos, {name = name .. "_burning"})
-		minetest.sound_play("tnt_ignite", {pos = pos}, true)
+		minetest.sound_play("tnt_ignite", {pos = pos})
 		minetest.get_node_timer(pos):start(1)
 	end
 end
@@ -404,9 +395,7 @@ function tnt.boom(pos, def)
 	if not def.explode_center then
 		minetest.set_node(pos, {name = "tnt:boom"})
 	end
-	local sound = def.sound or "tnt_explode"
+	minetest.sound_play("tnt_explode", {pos = pos, gain = 1.5, max_hear_distance = 2*64})
-	minetest.sound_play(sound, {pos = pos, gain = 2.5,
-			max_hear_distance = math.min(def.radius * 20, 128)}, true)
 	local drops, radius = tnt_explode(pos, def.radius, def.ignore_protection,
 			def.ignore_on_blast, owner, def.explode_center)
 	-- append entity drops
@@ -431,7 +420,7 @@ minetest.register_node("tnt:boom", {
 })
 
 minetest.register_node("tnt:gunpowder", {
-	description = S("Gun Powder"),
+	description = "Gun Powder",
 	drawtype = "raillike",
 	paramtype = "light",
 	is_ground_content = false,
@@ -544,8 +533,7 @@ minetest.register_node("tnt:gunpowder_burning", {
 	-- unaffected by explosions
 	on_blast = function() end,
 	on_construct = function(pos)
-		minetest.sound_play("tnt_gunpowder_burning", {pos = pos,
+		minetest.sound_play("tnt_gunpowder_burning", {pos = pos, gain = 2})
-			gain = 2}, true)
 		minetest.get_node_timer(pos):start(1)
 	end,
 })
@@ -556,28 +544,13 @@ minetest.register_craft({
 	recipe = {"default:coal_lump", "default:gravel"}
 })
 
-minetest.register_craftitem("tnt:tnt_stick", {
-	description = S("TNT Stick"),
-	inventory_image = "tnt_tnt_stick.png",
-	groups = {flammable = 5},
-})
-
 if enable_tnt then
-	minetest.register_craft({
-		output = "tnt:tnt_stick 2",
-		recipe = {
-			{"tnt:gunpowder", "", "tnt:gunpowder"},
-			{"tnt:gunpowder", "default:paper", "tnt:gunpowder"},
-			{"tnt:gunpowder", "", "tnt:gunpowder"},
-		}
-	})
-
 	minetest.register_craft({
 		output = "tnt:tnt",
 		recipe = {
-			{"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"},
+			{"group:wood",    "tnt:gunpowder", "group:wood"},
-			{"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"},
+			{"tnt:gunpowder", "tnt:gunpowder", "tnt:gunpowder"},
-			{"tnt:tnt_stick", "tnt:tnt_stick", "tnt:tnt_stick"}
+			{"group:wood",    "tnt:gunpowder", "group:wood"}
 		}
 	})
 
@@ -676,7 +649,7 @@ function tnt.register_tnt(def)
 		-- unaffected by explosions
 		on_blast = function() end,
 		on_construct = function(pos)
-			minetest.sound_play("tnt_ignite", {pos = pos}, true)
+			minetest.sound_play("tnt_ignite", {pos = pos})
 			minetest.get_node_timer(pos):start(4)
 			minetest.check_for_falling(pos)
 		end,
@@ -685,6 +658,6 @@ end
 
 tnt.register_tnt({
 	name = "tnt:tnt",
-	description = S("TNT"),
+	description = "TNT",
 	radius = tnt_radius,
 })

license.txt

@@ -26,17 +26,15 @@ DEALINGS IN THE SOFTWARE.
 For more details:
 https://opensource.org/licenses/MIT
 
-===================================
 
-Licenses of media
+Licenses of media (textures)
------------------
+----------------------------
 
 Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
 Copyright (C) 2014-2016 BlockMen
 Copyright (C) 2014-2016 ShadowNinja
 Copyright (C) 2015-2016 Wuzzy
 Copyright (C) 2016 sofar (sofar@foo-projects.org)
-Copyright (C) 2018 paramat
 
 You are free to:
 Share — copy and redistribute the material in any medium or format.
@@ -65,36 +63,3 @@ rights may limit how you use the material.
 
 For more details:
 http://creativecommons.org/licenses/by-sa/3.0/
-
-====================================================
-
-CC0 1.0 Universal (CC0 1.0) Public Domain Dedication 
-for audio files (found in sounds folder)
-TumeniNodes
-steveygos93
-theneedle.tv
-frankelmedico
-
-No Copyright
-
-The person who associated a work with this deed has dedicated the work to the public domain
-by waiving all of his or her rights to the work worldwide under copyright law, including all
-related and neighboring rights, to the extent allowed by law.
-
-You can copy, modify, distribute and perform the work, even for commercial purposes, all
-without asking permission. See Other Information below.
-
-In no way are the patent or trademark rights of any person affected by CC0, nor are the
-rights that other persons may have in the work or in how the work is used, such as publicity
-or privacy rights.
-
-Unless expressly stated otherwise, the person who associated a work with this deed makes no
-warranties about the work, and disclaims liability for all uses of the work, to the fullest
-extent permitted by applicable law.
-
-When using or citing the work, you should not imply endorsement by the author or the affirmer.
-
-This license is acceptable for Free Cultural Works.
-For more Information:
-https://creativecommons.org/publicdomain/zero/1.0/
-

locale/template.txt

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=
-TNT Stick=
-TNT=

locale/tnt.de.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Schießpulver
-TNT Stick=TNT-Stange
-TNT=TNT

locale/tnt.es.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Pólvora
-TNT Stick=Cartucho de TNT
-TNT=TNT

locale/tnt.fr.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Poudre à canon
-TNT Stick=Bâton de TNT
-TNT=TNT

locale/tnt.it.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Polvere da sparo
-TNT Stick=Candelotto di TNT
-TNT=TNT

locale/tnt.ms.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Serbuk Senjata Api
-TNT Stick=Batang TNT
-TNT=TNT

locale/tnt.ru.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Порох
-TNT Stick=Тротиловая Палка
-TNT=Тротил

locale/tnt.se.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=Krut
-TNT Stick=Dynamitpinne
-TNT=Dynamit

locale/tnt.zh_CN.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=火药粉
-TNT Stick=炸药棒
-TNT=炸药包

locale/tnt.zh_TW.tr

@@ -1,4 +0,0 @@
-# textdomain: tnt
-Gun Powder=火藥粉
-TNT Stick=炸藥棒
-TNT=炸藥包

mod.conf

@@ -1,3 +0,0 @@
-name = tnt
-description = Minetest Game mod: tnt
-depends = default, fire