From 0ca4520cc22fdea26e1d94800d112b957975e28d Mon Sep 17 00:00:00 2001
From: ShadowNinja <shadowninja@minetest.net>
Date: Sun, 13 Jul 2014 18:08:03 -0400
Subject: [PATCH] Rewrite TNT

---
 mods/tnt/README.txt             |  19 +-
 mods/tnt/depends.txt            |   1 +
 mods/tnt/init.lua               | 468 ++++++++++++++++----------------
 mods/tnt/textures/tnt_smoke.png | Bin 184 -> 202 bytes
 4 files changed, 241 insertions(+), 247 deletions(-)

diff --git a/mods/tnt/README.txt b/mods/tnt/README.txt
index 46d3fca1..90a34677 100644
--- a/mods/tnt/README.txt
+++ b/mods/tnt/README.txt
@@ -1,27 +1,18 @@
-=== TNT-MOD for MINETEST-C55 ===
-by PilzAdam
+=== TNT mod for Minetest ===
+by PilzAdam and ShadowNinja
 
 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)
+  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:
diff --git a/mods/tnt/depends.txt b/mods/tnt/depends.txt
index 70715c7b..5ff216f7 100644
--- a/mods/tnt/depends.txt
+++ b/mods/tnt/depends.txt
@@ -1,2 +1,3 @@
 default
 fire
+
diff --git a/mods/tnt/init.lua b/mods/tnt/init.lua
index 2f2dbbe3..1182acae 100644
--- a/mods/tnt/init.lua
+++ b/mods/tnt/init.lua
@@ -1,197 +1,222 @@
+
+-- Default to enabled in singleplayer and disabled in multiplayer
+local singleplayer = minetest.is_singleplayer()
+local setting = minetest.setting_getbool("enable_tnt")
+if (not singleplayer and setting ~= false) or
+		(singleplayer and setting ~= true) then
+	return
+end
+
 -- loss probabilities array (one in X will be lost)
 local loss_prob = {}
 
 loss_prob["default:cobble"] = 3
 loss_prob["default:dirt"] = 4
 
-local radius_max = tonumber(minetest.setting_get("tnt_radius_max") or 25)
+local radius = tonumber(minetest.setting_get("tnt_radius") or 3)
 
-local eject_drops = function(pos, stack)
-	local obj = minetest.add_item(pos, stack)
-
-	if obj == nil then
-		return
+-- Fill a list with data for content IDs, after all nodes are registered
+local cid_data = {}
+minetest.after(0, function()
+	for name, def in pairs(minetest.registered_nodes) do
+		cid_data[minetest.get_content_id(name)] = {
+			name = name,
+			drops = def.drops,
+			flammable = def.groups.flammable,
+		}
 	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)
+
+local function rand_pos(center, pos, radius)
+	pos.x = center.x + math.random(-radius, radius)
+	pos.z = center.z + math.random(-radius, radius)
 end
 
-local add_drop = function(drops, pos, item)
-	if loss_prob[item] ~= nil then
-		if math.random(1,loss_prob[item]) == 1 then
-			return
+local function eject_drops(drops, pos, radius)
+	local drop_pos = vector.new(pos)
+	for _, item in pairs(drops) do
+		local count = item:get_count()
+		local max = item:get_stack_max()
+		if count > max then
+			item:set_count(max)
+		end
+		while count > 0 do
+			if count < max then
+				item:set_count(count)
+			end
+			rand_pos(pos, drop_pos, radius)
+			local obj = minetest.add_item(drop_pos, item)
+			if obj then
+				obj:get_luaentity().collect = true
+				obj:setacceleration({x=0, y=-10, z=0})
+				obj:setvelocity({x=math.random(-3, 3), y=10,
+						z=math.random(-3, 3)})
+			end
+			count = count - max
 		end
 	end
+end
 
-	if drops[item] == nil then
-		drops[item] = ItemStack(item)
-	else
-		drops[item]:add_item(item)
+local function add_drop(drops, item)
+	item = ItemStack(item)
+	local name = item:get_name()
+	if loss_prob[name] ~= nil and math.random(1, loss_prob[name]) == 1 then
+		return
 	end
 
-	if drops[item]:get_free_space() == 0 then
-		stack = drops[item]
-		eject_drops(pos, stack)
-		drops[item] = nil
+	local drop = drops[name]
+	if drop == nil then
+		drops[name] = item
+	else
+		drop:set_count(drop:get_count() + item:get_count())
 	end
 end
 
-local function destroy(drops, pos, last, fast)
+local fire_node = {name="fire:basic_flame"}
+
+local function destroy(drops, pos, cid)
 	if minetest.is_protected(pos, "") then
 		return
 	end
-
-	local nodename = minetest.get_node(pos).name
-	if nodename ~= "air" then
-		minetest.remove_node(pos, (fast and 1 or 0))
-		if last then
-			nodeupdate(pos)
-		end
-		if minetest.registered_nodes[nodename].groups.flammable ~= nil then
-			minetest.set_node(pos, {name="fire:basic_flame"}, (fast and 2 or 0))
-			return
-		end
-		local drop = minetest.get_node_drops(nodename, "")
-		for _,item in ipairs(drop) do
-			if type(item) == "string" then
-				add_drop(drops, pos, item)
-			else
-				for i=1,item:get_count() do
-					add_drop(drops, pos, item:get_name())
-				end
+	local def = cid_data[cid]
+	if def and def.flammable then
+		minetest.set_node(pos, fire_node)
+	else
+		minetest.remove_node(pos)
+		if def then
+			local node_drops = minetest.get_node_drops(def.name, "")
+			for _, item in ipairs(node_drops) do
+				add_drop(drops, item)
 			end
 		end
 	end
 end
 
-boom = function(pos, time)
-	minetest.after(time, function(pos)
-		if minetest.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.set_node(pos, {name="tnt:boom"})
-		minetest.after(0.5, function(pos)
-			minetest.remove_node(pos)
-		end, {x=pos.x, y=pos.y, z=pos.z})
-		
 
-		local radius = 2
-		local drops = {}
-		local list = {}
-		local dr = 0
-		local tnts = 1
-		local destroyed = 0
-		while dr<radius do
-			dr=dr+1
-			for dx=-dr,dr,dr*2 do
-				for dy=-dr,dr,1 do
-					for dz=-dr,dr,1 do
-						table.insert(list, {x=dx, y=dy, z=dz})
-					end
-				end
+local function calc_velocity(pos1, pos2, old_vel, power)
+	local vel = vector.direction(pos1, pos2)
+	vel = vector.normalize(vel)
+	vel = vector.multiply(vel, power)
+
+	-- Divide by distance
+	local dist = vector.distance(pos1, pos2)
+	dist = math.max(dist, 1)
+	vel = vector.divide(vel, dist)
+
+	-- Add old velocity
+	vel = vector.add(vel, old_vel)
+	return vel
+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)
+	for _, obj in pairs(objs) do
+		local obj_pos = obj:getpos()
+		local obj_vel = obj:getvelocity()
+		local dist = math.max(1, vector.distance(pos, obj_pos))
+
+		if obj_vel ~= nil then
+			obj:setvelocity(calc_velocity(pos, obj_pos,
+					obj_vel, radius * 10))
+		end
+
+		local damage = (4 / dist) * radius
+		obj:set_hp(obj:get_hp() - damage)
+	end
+end
+
+local function add_effects(pos, radius)
+	minetest.add_particlespawner({
+		amount = 128,
+		time = 1,
+		minpos = vector.subtract(pos, radius / 2),
+		maxpos = vector.add(pos, radius / 2),
+		minvel = {x=-20, y=-20, z=-20},
+		maxvel = {x=20,  y=20,  z=20},
+		minacc = vector.new(),
+		maxacc = vector.new(),
+		minexptime = 1,
+		maxexptime = 3,
+		minsize = 8,
+		maxsize = 16,
+		texture = "tnt_smoke.png",
+	})
+end
+
+local function burn(pos)
+	local name = minetest.get_node(pos).name
+	if name == "tnt:tnt" then
+		minetest.sound_play("tnt_ignite", {pos=pos})
+		minetest.set_node(pos, {name="tnt:tnt_burning"})
+		minetest.get_node_timer(pos):start(1)
+	elseif name == "tnt:gunpowder" then
+		minetest.sound_play("tnt_gunpowder_burning", {pos=pos, gain=2})
+		minetest.set_node(pos, {name="tnt:gunpowder_burning"})
+		minetest.get_node_timer(pos):start(1)
+	end
+end
+
+local function explode(pos, radius)
+	local pos = vector.round(pos)
+	local vm = VoxelManip()
+	local pr = PseudoRandom(os.time())
+	local p1 = vector.subtract(pos, radius)
+	local p2 = vector.add(pos, radius)
+	local minp, maxp = vm:read_from_map(p1, p2)
+	local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
+	local data = vm:get_data()
+
+	local drops = {}
+	local p = {}
+
+	local c_air = minetest.get_content_id("air")
+	local c_tnt = minetest.get_content_id("tnt:tnt")
+	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_fire = minetest.get_content_id("fire:basic_flame")
+
+	for z = -radius, radius do
+	for y = -radius, radius do
+	local vi = a:index(pos.x + (-radius), pos.y + y, pos.z + z)
+	for x = -radius, radius do
+		if (x * x) + (y * y) + (z * z) <=
+				(radius * radius) + pr:next(-radius, radius) then
+			local cid = data[vi]
+			p.x = pos.x + x
+			p.y = pos.y + y
+			p.z = pos.z + z
+			if cid == c_tnt or cid == c_gunpowder then
+				burn(p)
+			elseif cid ~= c_tnt_burning and
+					cid ~= c_gunpowder_burning and
+					cid ~= c_air and
+					cid ~= c_fire and
+					cid ~= c_boom then
+				destroy(drops, p, cid)
 			end
-			for dy=-dr,dr,dr*2 do
-				for dx=-dr+1,dr-1,1 do
-					for dz=-dr,dr,1 do
-						table.insert(list, {x=dx, y=dy, z=dz})
-					end
-				end
-			end
-			for dz=-dr,dr,dr*2 do
-				for dx=-dr+1,dr-1,1 do
-					for dy=-dr+1,dr-1,1 do
-						table.insert(list, {x=dx, y=dy, z=dz})
-					end
-				end
-			end
-				for _,p in ipairs(list) do
-					local np = {x=pos.x+p.x, y=pos.y+p.y, z=pos.z+p.z}
-					
-					local node =  minetest.get_node(np)
-					if node.name == "air" then
-					elseif node.name == "tnt:tnt" or node.name == "tnt:tnt_burning" then
-						if radius < radius_max then
-							if radius <= 5 then
-								radius = radius + 1
-							elseif radius <= 10 then
-								radius = radius + 0.5
-							else
-								radius = radius + 0.3
-							end
-							minetest.remove_node(np, 2)
-						tnts = tnts + 1
-						else
-						minetest.set_node(np, {name="tnt:tnt_burning"})
-						boom(np, 1)
-						end
-					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(p.x)<2 and math.abs(p.y)<2 and math.abs(p.z)<2 then
-							destroy(drops, np, dr == radius, radius > 7)
-							destroyed = destroyed + 1
-						else
-							if math.random(1,5) <= 4 then
-								destroy(drops, np, dr == radius, radius > 7)
-								destroyed = destroyed + 1
-							end
-						end
-					end
-				end
 		end
+		vi = vi + 1
+	end
+	end
+	end
 
-		local objects = minetest.get_objects_inside_radius(pos, radius*2)
-		for _,obj in ipairs(objects) do
-			--if obj:is_player() or (obj:get_luaentity() and obj:get_luaentity().name ~= "__builtin:item") then
-				local p = obj:getpos()
-				local v = obj:getvelocity()
-				local vec = {x=p.x-pos.x, y=p.y-pos.y, z=p.z-pos.z}
-				local dist = (vec.x^2+vec.y^2+vec.z^2)^0.5
-				local damage = ((radius*20)/dist)
-				--print("DMG dist="..dist.." damage="..damage)
-				if obj:is_player() or (obj:get_luaentity() and obj:get_luaentity().name ~= "__builtin:item") then
-				obj:punch(obj, 1.0, {
-					full_punch_interval=1.0,
-					damage_groups={fleshy=damage},
-				}, vec)
-				end
-				if v ~= nil then
-					--obj:setvelocity({x=(p.x - pos.x) + (radius / 4) + v.x, y=(p.y - pos.y) + (radius / 2) + v.y, z=(p.z - pos.z) + (radius / 4) + v.z})
-					obj:setvelocity({x=(p.x - pos.x) + (radius / 2) + v.x, y=(p.y - pos.y) + radius + v.y,       z=(p.z - pos.z) + (radius / 2) + v.z})
-				end
-			--end
-		end
+	return drops
+end
 
 
-		print("TNT exploded=" .. tnts .. " radius=" .. radius .. " destroyed="..destroyed)
+local function boom(pos)
+	minetest.sound_play("tnt_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)
 
-		for _,stack in pairs(drops) do
-			eject_drops(pos, stack)
-		end
-		local radiusp = radius+1
-		minetest.add_particlespawner(
-			100, --amount
-			0.1, --time
-			{x=pos.x-radiusp, y=pos.y-radiusp, z=pos.z-radiusp}, --minpos
-			{x=pos.x+radiusp, y=pos.y+radiusp, z=pos.z+radiusp}, --maxpos
-			{x=-0, y=-0, z=-0}, --minvel
-			{x=0, y=0, z=0}, --maxvel
-			{x=-0.5,y=5,z=-0.5}, --minacc
-			{x=0.5,y=5,z=0.5}, --maxacc
-			0.1, --minexptime
-			1, --maxexptime
-			8, --minsize
-			15, --maxsize
-			false, --collisiondetection
-			"tnt_smoke.png" --texture
-		)
-	end, pos)
+	local drops = explode(pos, radius)
+	entity_physics(pos, radius)
+	eject_drops(drops, pos, radius)
+	add_effects(pos, radius)
 end
 
 minetest.register_node("tnt:tnt", {
@@ -199,30 +224,32 @@ minetest.register_node("tnt: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.set_node(pos, {name="tnt:tnt_burning"})
-			boom(pos, 4)
+			minetest.get_node_timer(pos):start(4)
 		end
 	end,
-	
-	mesecons = {
-		effector = {
-			action_on = function(pos, node)
-				minetest.set_node(pos, {name="tnt:tnt_burning"})
-				boom(pos, 0)
-			end
-		},
-	},
+	mesecons = {effector = {action_on = boom}},
 })
 
 minetest.register_node("tnt:tnt_burning", {
-	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"},
+	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(),
+	on_timer = boom,
 })
 
 minetest.register_node("tnt:boom", {
@@ -232,54 +259,11 @@ minetest.register_node("tnt:boom", {
 	walkable = false,
 	drop = "",
 	groups = {dig_immediate=3},
+	on_timer = function(pos, elapsed)
+		minetest.remove_node(pos)
+	end,
 })
 
-burn = function(pos)
-	if minetest.get_node(pos).name == "tnt:tnt" then
-		minetest.sound_play("tnt_ignite", {pos=pos})
-		minetest.set_node(pos, {name="tnt:tnt_burning"})
-		boom(pos, 1)
-		return
-	end
-	if minetest.get_node(pos).name ~= "tnt:gunpowder" then
-		return
-	end
-	minetest.sound_play("tnt_gunpowder_burning", {pos=pos, gain=2})
-	minetest.set_node(pos, {name="tnt:gunpowder_burning"})
-	
-	minetest.after(1, function(pos)
-		if minetest.get_node(pos).name ~= "tnt:gunpowder_burning" then
-			return
-		end
-		minetest.after(0.5, function(pos)
-			minetest.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",
@@ -309,7 +293,15 @@ minetest.register_node("tnt:gunpowder_burning", {
 	sunlight_propagates = true,
 	walkable = false,
 	light_source = 5,
-	tiles = {{name="tnt_gunpowder_burning_animated.png", animation={type="vertical_frames", aspect_w=16, aspect_h=16, length=1}}},
+	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},
@@ -317,21 +309,30 @@ minetest.register_node("tnt:gunpowder_burning", {
 	drop = "",
 	groups = {dig_immediate=2,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
+	on_timer = function(pos, elapsed)
+		for dx = -1, 1 do
+		for dz = -1, 1 do
+		for dy = -1, 1 do
+			if not (dx == 0 and dz == 0) then
+				burn({
+					x = pos.x + dx,
+					y = pos.y + dy,
+					z = pos.z + dz,
+				})
+			end
+		end
+		end
+		end
+		minetest.remove_node(pos)
+	end
 })
 
 minetest.register_abm({
 	nodenames = {"tnt:tnt", "tnt:gunpowder"},
 	neighbors = {"fire:basic_flame", "default:lava_source", "default:lava_flowing"},
-	interval = 2,
-	chance = 10,
-	action = function(pos, node)
-		if node.name == "tnt:tnt" then
-			minetest.set_node(pos, {name="tnt:tnt_burning"})
-			boom({x=pos.x, y=pos.y, z=pos.z}, 0)
-		else
-			burn(pos)
-		end
-	end
+	interval = 1,
+	chance = 1,
+	action = burn,
 })
 
 minetest.register_craft({
@@ -343,12 +344,13 @@ minetest.register_craft({
 minetest.register_craft({
 	output = "tnt:tnt",
 	recipe = {
-		{"", "group:wood", ""},
+		{"",           "group:wood",    ""},
 		{"group:wood", "tnt:gunpowder", "group:wood"},
-		{"", "group:wood", ""}
+		{"",           "group:wood",    ""}
 	}
 })
 
 if minetest.setting_get("log_mods") then
-	minetest.log("action", "tnt loaded")
+	minetest.debug("[TNT] Loaded!")
 end
+
diff --git a/mods/tnt/textures/tnt_smoke.png b/mods/tnt/textures/tnt_smoke.png
index c3790476e7fa5650aca030806347ef963eb3f40f..488b50fe958d33fa4cd50fa383a4685db045def5 100644
GIT binary patch
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