forked from minetest/minetest_game
20bd4560f8
It is useful for protection mods to know who owns an exploding TNT block. This allows the blocks destroyed by the TNT to be limited to the same ones the owner could destroy without using TNT. TNT placed within a protected area by the area owner, and later ignited by another player will destroy within the protected area nodes the igniter may not otherwise be able to interact with. Any player could significantly increase the size of an explosion by placing more TNT in an adjacent unprotected area if the original TNT block was placed withing 1 node of such a boundary. This feature sounds dangerous, but we are talking about TNT. Players should use it carefully.
660 lines
17 KiB
Lua
660 lines
17 KiB
Lua
tnt = {}
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-- Default to enabled when in singleplayer
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local enable_tnt = minetest.settings:get_bool("enable_tnt")
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if enable_tnt == nil then
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enable_tnt = minetest.is_singleplayer()
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end
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-- loss probabilities array (one in X will be lost)
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local loss_prob = {}
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loss_prob["default:cobble"] = 3
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loss_prob["default:dirt"] = 4
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local tnt_radius = tonumber(minetest.settings:get("tnt_radius") or 3)
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-- Fill a list with data for content IDs, after all nodes are registered
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local cid_data = {}
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minetest.after(0, function()
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for name, def in pairs(minetest.registered_nodes) do
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cid_data[minetest.get_content_id(name)] = {
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name = name,
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drops = def.drops,
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flammable = def.groups.flammable,
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on_blast = def.on_blast,
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}
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end
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end)
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local function rand_pos(center, pos, radius)
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local def
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local reg_nodes = minetest.registered_nodes
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local i = 0
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repeat
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-- Give up and use the center if this takes too long
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if i > 4 then
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pos.x, pos.z = center.x, center.z
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break
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end
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pos.x = center.x + math.random(-radius, radius)
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pos.z = center.z + math.random(-radius, radius)
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def = reg_nodes[minetest.get_node(pos).name]
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i = i + 1
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until def and not def.walkable
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end
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local function eject_drops(drops, pos, radius)
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local drop_pos = vector.new(pos)
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for _, item in pairs(drops) do
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local count = math.min(item:get_count(), item:get_stack_max())
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while count > 0 do
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local take = math.max(1,math.min(radius * radius,
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count,
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item:get_stack_max()))
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rand_pos(pos, drop_pos, radius)
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local dropitem = ItemStack(item)
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dropitem:set_count(take)
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local obj = minetest.add_item(drop_pos, dropitem)
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if obj then
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obj:get_luaentity().collect = true
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obj:setacceleration({x = 0, y = -10, z = 0})
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obj:setvelocity({x = math.random(-3, 3),
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y = math.random(0, 10),
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z = math.random(-3, 3)})
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end
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count = count - take
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end
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end
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end
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local function add_drop(drops, item)
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item = ItemStack(item)
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local name = item:get_name()
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if loss_prob[name] ~= nil and math.random(1, loss_prob[name]) == 1 then
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return
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end
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local drop = drops[name]
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if drop == nil then
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drops[name] = item
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else
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drop:set_count(drop:get_count() + item:get_count())
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end
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end
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local basic_flame_on_construct -- cached value
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local function destroy(drops, npos, cid, c_air, c_fire,
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on_blast_queue, on_construct_queue,
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ignore_protection, ignore_on_blast, owner)
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if not ignore_protection and minetest.is_protected(npos, owner) then
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return cid
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end
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local def = cid_data[cid]
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if not def then
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return c_air
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elseif not ignore_on_blast and def.on_blast then
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on_blast_queue[#on_blast_queue + 1] = {
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pos = vector.new(npos),
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on_blast = def.on_blast
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}
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return cid
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elseif def.flammable then
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on_construct_queue[#on_construct_queue + 1] = {
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fn = basic_flame_on_construct,
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pos = vector.new(npos)
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}
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return c_fire
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else
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local node_drops = minetest.get_node_drops(def.name, "")
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for _, item in pairs(node_drops) do
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add_drop(drops, item)
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end
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return c_air
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end
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end
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local function calc_velocity(pos1, pos2, old_vel, power)
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-- Avoid errors caused by a vector of zero length
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if vector.equals(pos1, pos2) then
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return old_vel
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end
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local vel = vector.direction(pos1, pos2)
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vel = vector.normalize(vel)
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vel = vector.multiply(vel, power)
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-- Divide by distance
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local dist = vector.distance(pos1, pos2)
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dist = math.max(dist, 1)
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vel = vector.divide(vel, dist)
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-- Add old velocity
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vel = vector.add(vel, old_vel)
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-- randomize it a bit
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vel = vector.add(vel, {
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x = math.random() - 0.5,
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y = math.random() - 0.5,
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z = math.random() - 0.5,
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})
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-- Limit to terminal velocity
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dist = vector.length(vel)
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if dist > 250 then
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vel = vector.divide(vel, dist / 250)
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end
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return vel
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end
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local function entity_physics(pos, radius, drops)
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local objs = minetest.get_objects_inside_radius(pos, radius)
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for _, obj in pairs(objs) do
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local obj_pos = obj:getpos()
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local dist = math.max(1, vector.distance(pos, obj_pos))
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local damage = (4 / dist) * radius
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if obj:is_player() then
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-- currently the engine has no method to set
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-- player velocity. See #2960
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-- instead, we knock the player back 1.0 node, and slightly upwards
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local dir = vector.normalize(vector.subtract(obj_pos, pos))
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local moveoff = vector.multiply(dir, dist + 1.0)
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local newpos = vector.add(pos, moveoff)
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newpos = vector.add(newpos, {x = 0, y = 0.2, z = 0})
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obj:setpos(newpos)
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obj:set_hp(obj:get_hp() - damage)
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else
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local do_damage = true
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local do_knockback = true
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local entity_drops = {}
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local luaobj = obj:get_luaentity()
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local objdef = minetest.registered_entities[luaobj.name]
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if objdef and objdef.on_blast then
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do_damage, do_knockback, entity_drops = objdef.on_blast(luaobj, damage)
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end
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if do_knockback then
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local obj_vel = obj:getvelocity()
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obj:setvelocity(calc_velocity(pos, obj_pos,
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obj_vel, radius * 10))
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end
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if do_damage then
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if not obj:get_armor_groups().immortal then
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obj:punch(obj, 1.0, {
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full_punch_interval = 1.0,
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damage_groups = {fleshy = damage},
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}, nil)
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end
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end
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for _, item in pairs(entity_drops) do
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add_drop(drops, item)
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end
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end
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end
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end
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local function add_effects(pos, radius, drops)
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minetest.add_particle({
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pos = pos,
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velocity = vector.new(),
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acceleration = vector.new(),
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expirationtime = 0.4,
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size = radius * 10,
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collisiondetection = false,
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vertical = false,
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texture = "tnt_boom.png",
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})
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minetest.add_particlespawner({
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amount = 64,
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time = 0.5,
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minpos = vector.subtract(pos, radius / 2),
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maxpos = vector.add(pos, radius / 2),
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minvel = {x = -10, y = -10, z = -10},
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maxvel = {x = 10, y = 10, z = 10},
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minacc = vector.new(),
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maxacc = vector.new(),
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minexptime = 1,
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maxexptime = 2.5,
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minsize = radius * 3,
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maxsize = radius * 5,
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texture = "tnt_smoke.png",
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})
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-- we just dropped some items. Look at the items entities and pick
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-- one of them to use as texture
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local texture = "tnt_blast.png" --fallback texture
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local most = 0
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for name, stack in pairs(drops) do
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local count = stack:get_count()
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if count > most then
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most = count
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local def = minetest.registered_nodes[name]
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if def and def.tiles and def.tiles[1] then
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texture = def.tiles[1]
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end
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end
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end
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minetest.add_particlespawner({
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amount = 64,
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time = 0.1,
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minpos = vector.subtract(pos, radius / 2),
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maxpos = vector.add(pos, radius / 2),
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minvel = {x = -3, y = 0, z = -3},
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maxvel = {x = 3, y = 5, z = 3},
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minacc = {x = 0, y = -10, z = 0},
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maxacc = {x = 0, y = -10, z = 0},
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minexptime = 0.8,
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maxexptime = 2.0,
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minsize = radius * 0.66,
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maxsize = radius * 2,
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texture = texture,
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collisiondetection = true,
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})
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end
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function tnt.burn(pos, nodename)
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local name = nodename or minetest.get_node(pos).name
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local def = minetest.registered_nodes[name]
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if not def then
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return
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elseif def.on_ignite then
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def.on_ignite(pos)
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elseif minetest.get_item_group(name, "tnt") > 0 then
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minetest.swap_node(pos, {name = name .. "_burning"})
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minetest.sound_play("tnt_ignite", {pos = pos})
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minetest.get_node_timer(pos):start(1)
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end
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end
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local function tnt_explode(pos, radius, ignore_protection, ignore_on_blast, owner)
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pos = vector.round(pos)
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-- scan for adjacent TNT nodes first, and enlarge the explosion
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local vm1 = VoxelManip()
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local p1 = vector.subtract(pos, 2)
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local p2 = vector.add(pos, 2)
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local minp, maxp = vm1:read_from_map(p1, p2)
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local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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local data = vm1:get_data()
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local count = 0
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local c_tnt = minetest.get_content_id("tnt:tnt")
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local c_tnt_burning = minetest.get_content_id("tnt:tnt_burning")
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local c_tnt_boom = minetest.get_content_id("tnt:boom")
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local c_air = minetest.get_content_id("air")
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for z = pos.z - 2, pos.z + 2 do
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for y = pos.y - 2, pos.y + 2 do
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local vi = a:index(pos.x - 2, y, z)
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for x = pos.x - 2, pos.x + 2 do
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local cid = data[vi]
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if cid == c_tnt or cid == c_tnt_boom or cid == c_tnt_burning then
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count = count + 1
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data[vi] = c_air
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end
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vi = vi + 1
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end
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end
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end
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vm1:set_data(data)
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vm1:write_to_map()
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-- recalculate new radius
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radius = math.floor(radius * math.pow(count, 1/3))
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-- perform the explosion
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local vm = VoxelManip()
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local pr = PseudoRandom(os.time())
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p1 = vector.subtract(pos, radius)
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p2 = vector.add(pos, radius)
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minp, maxp = vm:read_from_map(p1, p2)
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a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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data = vm:get_data()
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local drops = {}
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local on_blast_queue = {}
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local on_construct_queue = {}
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basic_flame_on_construct = minetest.registered_nodes["fire:basic_flame"].on_construct
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local c_fire = minetest.get_content_id("fire:basic_flame")
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for z = -radius, radius do
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for y = -radius, radius do
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local vi = a:index(pos.x + (-radius), pos.y + y, pos.z + z)
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for x = -radius, radius do
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local r = vector.length(vector.new(x, y, z))
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if (radius * radius) / (r * r) >= (pr:next(80, 125) / 100) then
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local cid = data[vi]
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local p = {x = pos.x + x, y = pos.y + y, z = pos.z + z}
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if cid ~= c_air then
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data[vi] = destroy(drops, p, cid, c_air, c_fire,
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on_blast_queue, on_construct_queue,
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ignore_protection, ignore_on_blast, owner)
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end
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end
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vi = vi + 1
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end
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end
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end
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vm:set_data(data)
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vm:write_to_map()
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vm:update_map()
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vm:update_liquids()
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-- call check_single_for_falling for everything within 1.5x blast radius
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for y = -radius * 1.5, radius * 1.5 do
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for z = -radius * 1.5, radius * 1.5 do
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for x = -radius * 1.5, radius * 1.5 do
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local rad = {x = x, y = y, z = z}
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local s = vector.add(pos, rad)
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local r = vector.length(rad)
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if r / radius < 1.4 then
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minetest.check_single_for_falling(s)
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end
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end
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end
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end
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for _, queued_data in pairs(on_blast_queue) do
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local dist = math.max(1, vector.distance(queued_data.pos, pos))
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local intensity = (radius * radius) / (dist * dist)
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local node_drops = queued_data.on_blast(queued_data.pos, intensity)
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if node_drops then
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for _, item in pairs(node_drops) do
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add_drop(drops, item)
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end
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end
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end
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for _, queued_data in pairs(on_construct_queue) do
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queued_data.fn(queued_data.pos)
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end
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minetest.log("action", "TNT owned by " .. owner .. " detonated at " ..
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minetest.pos_to_string(pos) .. " with radius " .. radius)
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return drops, radius
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end
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function tnt.boom(pos, def)
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local meta = minetest.get_meta(pos)
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local owner = meta:get_string("owner")
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minetest.sound_play("tnt_explode", {pos = pos, gain = 1.5, max_hear_distance = 2*64})
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minetest.set_node(pos, {name = "tnt:boom"})
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local drops, radius = tnt_explode(pos, def.radius, def.ignore_protection,
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def.ignore_on_blast, owner)
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-- append entity drops
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local damage_radius = (radius / def.radius) * def.damage_radius
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entity_physics(pos, damage_radius, drops)
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if not def.disable_drops then
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eject_drops(drops, pos, radius)
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end
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add_effects(pos, radius, drops)
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minetest.log("action", "A TNT explosion occurred at " .. minetest.pos_to_string(pos) ..
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" with radius " .. radius)
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end
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minetest.register_node("tnt:boom", {
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drawtype = "airlike",
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light_source = default.LIGHT_MAX,
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walkable = false,
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drop = "",
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groups = {dig_immediate = 3},
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on_construct = function(pos)
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minetest.get_node_timer(pos):start(0.4)
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end,
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on_timer = function(pos, elapsed)
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minetest.remove_node(pos)
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end,
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-- unaffected by explosions
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on_blast = function() end,
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})
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minetest.register_node("tnt:gunpowder", {
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description = "Gun Powder",
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drawtype = "raillike",
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paramtype = "light",
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is_ground_content = false,
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sunlight_propagates = true,
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walkable = false,
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tiles = {
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"tnt_gunpowder_straight.png",
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"tnt_gunpowder_curved.png",
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"tnt_gunpowder_t_junction.png",
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"tnt_gunpowder_crossing.png"
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},
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inventory_image = "tnt_gunpowder_inventory.png",
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wield_image = "tnt_gunpowder_inventory.png",
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selection_box = {
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type = "fixed",
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fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
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},
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groups = {dig_immediate = 2, attached_node = 1, flammable = 5,
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connect_to_raillike = minetest.raillike_group("gunpowder")},
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sounds = default.node_sound_leaves_defaults(),
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on_punch = function(pos, node, puncher)
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if puncher:get_wielded_item():get_name() == "default:torch" then
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minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
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minetest.log("action", puncher:get_player_name() ..
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" ignites tnt:gunpowder at " ..
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minetest.pos_to_string(pos))
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end
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end,
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on_blast = function(pos, intensity)
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minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
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end,
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on_burn = function(pos)
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minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
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end,
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on_ignite = function(pos, igniter)
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minetest.set_node(pos, {name = "tnt:gunpowder_burning"})
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end,
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})
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minetest.register_node("tnt:gunpowder_burning", {
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drawtype = "raillike",
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paramtype = "light",
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sunlight_propagates = true,
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walkable = false,
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light_source = 5,
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tiles = {{
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name = "tnt_gunpowder_burning_straight_animated.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 1,
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}
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},
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{
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name = "tnt_gunpowder_burning_curved_animated.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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|
aspect_h = 16,
|
|
length = 1,
|
|
}
|
|
},
|
|
{
|
|
name = "tnt_gunpowder_burning_t_junction_animated.png",
|
|
animation = {
|
|
type = "vertical_frames",
|
|
aspect_w = 16,
|
|
aspect_h = 16,
|
|
length = 1,
|
|
}
|
|
},
|
|
{
|
|
name = "tnt_gunpowder_burning_crossing_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,
|
|
attached_node = 1,
|
|
connect_to_raillike = minetest.raillike_group("gunpowder")
|
|
},
|
|
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
|
|
tnt.burn({
|
|
x = pos.x + dx,
|
|
y = pos.y + dy,
|
|
z = pos.z + dz,
|
|
})
|
|
end
|
|
end
|
|
end
|
|
end
|
|
minetest.remove_node(pos)
|
|
end,
|
|
-- unaffected by explosions
|
|
on_blast = function() end,
|
|
on_construct = function(pos)
|
|
minetest.sound_play("tnt_gunpowder_burning", {pos = pos, gain = 2})
|
|
minetest.get_node_timer(pos):start(1)
|
|
end,
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "tnt:gunpowder 5",
|
|
type = "shapeless",
|
|
recipe = {"default:coal_lump", "default:gravel"}
|
|
})
|
|
|
|
if enable_tnt then
|
|
minetest.register_craft({
|
|
output = "tnt:tnt",
|
|
recipe = {
|
|
{"group:wood", "tnt:gunpowder", "group:wood"},
|
|
{"tnt:gunpowder", "tnt:gunpowder", "tnt:gunpowder"},
|
|
{"group:wood", "tnt:gunpowder", "group:wood"}
|
|
}
|
|
})
|
|
|
|
minetest.register_abm({
|
|
label = "TNT ignition",
|
|
nodenames = {"group:tnt", "tnt:gunpowder"},
|
|
neighbors = {"fire:basic_flame", "default:lava_source", "default:lava_flowing"},
|
|
interval = 4,
|
|
chance = 1,
|
|
action = function(pos, node)
|
|
tnt.burn(pos, node.name)
|
|
end,
|
|
})
|
|
end
|
|
|
|
function tnt.register_tnt(def)
|
|
local name
|
|
if not def.name:find(':') then
|
|
name = "tnt:" .. def.name
|
|
else
|
|
name = def.name
|
|
def.name = def.name:match(":([%w_]+)")
|
|
end
|
|
if not def.tiles then def.tiles = {} end
|
|
local tnt_top = def.tiles.top or def.name .. "_top.png"
|
|
local tnt_bottom = def.tiles.bottom or def.name .. "_bottom.png"
|
|
local tnt_side = def.tiles.side or def.name .. "_side.png"
|
|
local tnt_burning = def.tiles.burning or def.name .. "_top_burning_animated.png"
|
|
if not def.damage_radius then def.damage_radius = def.radius * 2 end
|
|
|
|
if enable_tnt then
|
|
minetest.register_node(":" .. name, {
|
|
description = def.description,
|
|
tiles = {tnt_top, tnt_bottom, tnt_side},
|
|
is_ground_content = false,
|
|
groups = {dig_immediate = 2, mesecon = 2, tnt = 1, flammable = 5},
|
|
sounds = default.node_sound_wood_defaults(),
|
|
after_place_node = function(pos, placer)
|
|
if placer:is_player() then
|
|
local meta = minetest.get_meta(pos)
|
|
meta:set_string("owner", placer:get_player_name())
|
|
end
|
|
end,
|
|
on_punch = function(pos, node, puncher)
|
|
if puncher:get_wielded_item():get_name() == "default:torch" then
|
|
minetest.swap_node(pos, {name = name .. "_burning"})
|
|
minetest.registered_nodes[name .. "_burning"].on_construct(pos)
|
|
minetest.log("action", puncher:get_player_name() ..
|
|
" ignites " .. node.name .. " at " ..
|
|
minetest.pos_to_string(pos))
|
|
end
|
|
end,
|
|
on_blast = function(pos, intensity)
|
|
minetest.after(0.1, function()
|
|
tnt.boom(pos, def)
|
|
end)
|
|
end,
|
|
mesecons = {effector =
|
|
{action_on =
|
|
function(pos)
|
|
tnt.boom(pos, def)
|
|
end
|
|
}
|
|
},
|
|
on_burn = function(pos)
|
|
minetest.swap_node(pos, {name = name .. "_burning"})
|
|
minetest.registered_nodes[name .. "_burning"].on_construct(pos)
|
|
end,
|
|
on_ignite = function(pos, igniter)
|
|
minetest.swap_node(pos, {name = name .. "_burning"})
|
|
minetest.registered_nodes[name .. "_burning"].on_construct(pos)
|
|
end,
|
|
})
|
|
end
|
|
|
|
minetest.register_node(":" .. name .. "_burning", {
|
|
tiles = {
|
|
{
|
|
name = tnt_burning,
|
|
animation = {
|
|
type = "vertical_frames",
|
|
aspect_w = 16,
|
|
aspect_h = 16,
|
|
length = 1,
|
|
}
|
|
},
|
|
tnt_bottom, tnt_side
|
|
},
|
|
light_source = 5,
|
|
drop = "",
|
|
sounds = default.node_sound_wood_defaults(),
|
|
groups = {falling_node = 1},
|
|
on_timer = function(pos, elapsed)
|
|
tnt.boom(pos, def)
|
|
end,
|
|
-- unaffected by explosions
|
|
on_blast = function() end,
|
|
on_construct = function(pos)
|
|
minetest.sound_play("tnt_ignite", {pos = pos})
|
|
minetest.get_node_timer(pos):start(4)
|
|
minetest.check_for_falling(pos)
|
|
end,
|
|
})
|
|
end
|
|
|
|
tnt.register_tnt({
|
|
name = "tnt:tnt",
|
|
description = "TNT",
|
|
radius = tnt_radius,
|
|
})
|