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

@@ -23,35 +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.
-
 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.

init.lua

@@ -58,8 +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
@@ -152,7 +152,7 @@ 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
@@ -164,7 +164,7 @@ local function entity_physics(pos, radius, drops)
 			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
@@ -179,8 +179,8 @@ local function entity_physics(pos, radius, drops)
 			end
 
 			if do_knockback then
-				local obj_vel = obj:get_velocity()
+				local obj_vel = obj:getvelocity()
-				obj:set_velocity(calc_velocity(pos, obj_pos,
+				obj:setvelocity(calc_velocity(pos, obj_pos,
 						obj_vel, radius * 10))
 			end
 			if do_damage then
@@ -395,9 +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 = 1.5,
-			max_hear_distance = math.min(def.radius * 20, 128)})
 	local drops, radius = tnt_explode(pos, def.radius, def.ignore_protection,
 			def.ignore_on_blast, owner, def.explode_center)
 	-- append entity drops
@@ -546,28 +544,13 @@ minetest.register_craft({
 	recipe = {"default:coal_lump", "default:gravel"}
 })
 
-minetest.register_craftitem("tnt:tnt_stick", {
-	description = "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"}
 		}
 	})
 

license.txt

@@ -35,7 +35,6 @@ 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.