315 lines
7.1 KiB
Lua
315 lines
7.1 KiB
Lua
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--
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-- TNT mod
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-- By PilzAdam and ShadowNinja
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-- Tweaked by Kaadmy, for Pixture
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--
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local S = minetest.get_translator("tnt")
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tnt = {}
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-- Default to enabled in singleplayer and disabled in multiplayer
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local singleplayer = minetest.is_singleplayer()
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local setting = minetest.settings:get_bool("tnt_enable")
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if (not singleplayer and setting ~= true) or (singleplayer and setting == false) then
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return
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end
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local tnt_radius = tonumber(minetest.settings:get("tnt_radius") or 3)
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-- Loss probabilities array (one in X will be lost)
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local loss_prob = {
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["default:cobble"] = 3,
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["default:dirt"] = 4,
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}
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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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local function rand_pos(center, pos, radius)
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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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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 = item:get_count()
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local max = item:get_stack_max()
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if count > max then
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item:set_count(max)
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end
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while count > 0 do
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if count < max then
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item:set_count(count)
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end
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rand_pos(pos, drop_pos, radius)
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local obj = minetest.add_item(drop_pos, item)
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if obj then
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obj:get_luaentity().collect = true
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obj:set_acceleration({x=0, y=-10, z=0})
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obj:set_velocity({x=math.random(-3, 3), y=10,
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z=math.random(-3, 3)})
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end
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count = count - max
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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 function destroy(drops, pos, cid)
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if minetest.is_protected(pos, "") then
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return
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end
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local def = cid_data[cid]
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if def and def.on_blast then
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def.on_blast(vector.new(pos), 1)
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return
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end
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minetest.remove_node(pos)
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if def then
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local node_drops = minetest.get_node_drops(def.name, "")
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for _, item in ipairs(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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local function calc_velocity(pos1, pos2, old_vel, power)
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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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return vel
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end
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local function entity_physics(pos, radius)
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-- Make the damage radius larger than the destruction radius
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radius = radius * 2
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local no_water = (minetest.find_node_near(pos, 2, {"default:water_source"}) == nil)
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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:get_pos()
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local obj_vel = obj:get_velocity()
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local dist = math.max(1, vector.distance(pos, obj_pos))
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if obj_vel ~= nil then
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obj:set_velocity(calc_velocity(pos, obj_pos,
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obj_vel, radius * 10))
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end
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if no_water then
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local damage = (4 / dist) * radius
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obj:set_hp(obj:get_hp() - damage)
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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)
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minetest.add_particlespawner(
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{
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amount = 128,
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time = 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 = -20, y = -20, z = -20},
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maxvel = {x = 20, y = 20, z = 20},
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minacc = vector.new(),
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maxacc = vector.new(),
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minexptime = 0.2,
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maxexptime = 1,
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minsize = 16,
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maxsize = 24,
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texture = "tnt_smoke.png",
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})
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end
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function tnt.burn(pos)
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local name = minetest.get_node(pos).name
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if name == "tnt:tnt" then
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minetest.sound_play("tnt_ignite", {pos = pos})
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minetest.set_node(pos, {name = "tnt:tnt_burning"})
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minetest.get_node_timer(pos):start(2)
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end
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end
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-- TNT ground removal
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function tnt.explode(pos, radius, sound)
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minetest.sound_play(
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sound,
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{
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pos = pos,
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gain = 1.5,
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max_hear_distance = 128
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})
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local pos = vector.round(pos)
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local vm = VoxelManip()
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local pr = PseudoRandom(os.time())
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local p1 = vector.subtract(pos, radius)
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local p2 = vector.add(pos, radius)
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local minp, maxp = vm:read_from_map(p1, p2)
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local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
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local data = vm:get_data()
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local drops = {}
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local p = {}
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local c_air = minetest.get_content_id("air")
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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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if (x * x) + (y * y) + (z * z) <= (radius * radius) + pr:next(-radius, radius) then
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local cid = data[vi]
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p.x = pos.x + x
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p.y = pos.y + y
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p.z = pos.z + z
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if cid ~= c_air then
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destroy(drops, p, cid)
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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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return drops
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end
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-- TNT node explosion
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function tnt.boom(pos)
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minetest.remove_node(pos)
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local drops = tnt.explode(pos, tnt_radius, "tnt_explode")
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entity_physics(pos, tnt_radius)
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eject_drops(drops, pos, tnt_radius)
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add_effects(pos, tnt_radius)
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end
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-- On load register content IDs
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local function on_load()
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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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on_blast = def.on_blast,
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}
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end
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end
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minetest.register_on_mods_loaded(on_load)
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-- Nodes
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minetest.register_node(
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"tnt:tnt",
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{
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description = S("TNT"),
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tiles = {"tnt_top.png", "tnt_bottom.png", "tnt_sides.png"},
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is_ground_content = false,
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groups = {dig_immediate = 2},
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sounds = default.node_sound_wood_defaults(),
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on_punch = function(pos, node, puncher)
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local itemname = puncher:get_wielded_item():get_name()
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if itemname == "default:flint_and_steel" then
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tnt.burn(pos)
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end
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end,
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on_blast = function(pos, intensity)
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tnt.burn(pos)
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end,
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})
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-- Nodes
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minetest.register_node(
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"tnt:tnt_burning",
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{
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tiles = {
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{
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name = "tnt_top_burning.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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"tnt_bottom.png", "tnt_sides.png"},
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light_source = 5,
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drop = "tnt:tnt",
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is_ground_content = false,
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groups = {dig_immediate = 2},
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sounds = default.node_sound_wood_defaults(),
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on_timer = tnt.boom,
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-- unaffected by explosions
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on_blast = function() end,
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})
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-- Crafting
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crafting.register_craft(
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{
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output = "tnt:tnt",
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items = {
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"group:planks 4",
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"default:flint_and_steel",
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}
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})
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minetest.register_craft(
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{
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type = "fuel",
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recipe = "tnt:tnt",
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burntime = 13,
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})
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-- Achievements
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achievements.register_achievement(
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"boom",
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{
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title = S("Boom!"),
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description = S("Craft TNT"),
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times = 1,
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craftitem = "tnt:tnt",
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})
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default.log("mod:tnt", "loaded")
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