532 lines
15 KiB
Lua
532 lines
15 KiB
Lua
--PilzAdam (MIT)
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--ShadowNinja (MIT)
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--sofar (sofar@foo-projects.org) (MIT)
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--Various Minetest developers and contributors (MIT)
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fl_tnt = {}
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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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-- 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.register_on_mods_loaded(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:set_acceleration({x = 0, y = -10, z = 0})
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obj:set_velocity({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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--minetest.chat_send_all(dump(on_blast_queue))
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local def = cid_data[cid]
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--minetest.chat_send_all(dump(cid_data[minetest.get_content_id("fl_stone:bedrock")]))
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--minetest.chat_send_all(minetest.get_name_from_content_id(cid))
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if not def then
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--minetest.chat_send_all("no def")
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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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--minetest.chat_send_all("on blast")
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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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--minetest.chat_send_all("flammable")
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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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--minetest.chat_send_all("else")
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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:get_pos()
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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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local dir = vector.normalize(vector.subtract(obj_pos, pos))
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local moveoff = vector.multiply(dir, 2 / dist * radius)
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obj:add_velocity(moveoff)
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obj:set_hp(obj:get_hp() - damage)
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else
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local luaobj = obj:get_luaentity()
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-- object might have disappeared somehow
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if luaobj then
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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 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:get_velocity()
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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 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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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 = {x=0, y=1, z=0},
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acceleration = vector.new(),
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expirationtime = 2,
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size = radius * 10,
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collisiondetection = false,
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vertical = false,
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texture = "farlands_explosion.png",
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animation = {type="vertical_frames", aspect_w=32, aspect_h=32, frame_length=1},
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glow = 15,
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})
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minetest.add_particlespawner({
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amount = 16,
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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 = -1, y = 2, z = -1},
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maxvel = {x = 1, y = 5, z = 1},
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minacc = vector.new(),
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maxacc = vector.new(),
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minexptime = 0.5,
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maxexptime = 1,
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minsize = radius * 3,
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maxsize = radius * 5,
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texture = "farlands_explosion_small.png",
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animation = {type="vertical_frames", aspect_w=32, aspect_h=32, frame_length=1},
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})
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minetest.add_particlespawner({
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amount = 32,
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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 = -1, y = 2, z = -1},
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maxvel = {x = 1, y = 5, z = 1},
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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 = "farlands_smoke.png",
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animation = {type="vertical_frames", aspect_w=32, aspect_h=32, frame_length=1},
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})
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minetest.after(0.2, function()
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minetest.add_particle({
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pos = {x=pos.x-0.5, y=pos.y-0.5, z=pos.z},
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velocity = {x=0, y=1, z=0},
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acceleration = {x=0, y=0, z=0},
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expirationtime = 2,
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size = radius * 10,
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collisiondetection = false,
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vertical = false,
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texture = "farlands_explosion.png",
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animation = {type="vertical_frames", aspect_w=32, aspect_h=32, frame_length=1},
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glow = 10
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})
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end)
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minetest.after(0.4, function()
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minetest.add_particle({
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pos = {x=pos.x+0.5, y=pos.y+0.5, z=pos.z+0.5},
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velocity = {x=0, y=1, z=0},
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acceleration = {x=0, y=0, z=0},
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expirationtime = 2,
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size = radius * 15,
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collisiondetection = false,
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vertical = false,
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texture = "farlands_explosion.png",
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animation = {type="vertical_frames", aspect_w=32, aspect_h=32, frame_length=1},
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glow = 10
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})
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end)
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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 node
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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 then
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node = { name = name }
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end
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--[[
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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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--]]
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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 * 0.33,
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maxsize = radius,
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--texture = texture,
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-- ^ only as fallback for clients without support for `node` parameter
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node = node,
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collisiondetection = true,
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})
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end
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local function tnt_explode(pos, radius, ignore_protection, ignore_on_blast, owner, explode_center)
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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_air = minetest.get_content_id("air")
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local c_tnt = minetest.get_content_id("fl_tnt:tnt")
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-- make sure we still have explosion even when centre node isnt tnt related
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if explode_center then
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count = 1
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end
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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 then
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minetest.add_entity({x = x, y = y, z = z}, "fl_tnt:tnt_entity")
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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 c_air = minetest.get_content_id("air")
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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["fl_stone:ors"].on_construct
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local c_fire = minetest.get_content_id("fl_stone:ors")
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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 fl_tnt.boom(pos, def)
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def = def or {}
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def.radius = def.radius or 4
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--def.radius = 4
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def.damage_radius = def.damage_radius or def.radius * 2
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local meta = minetest.get_meta(pos)
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local owner = meta:get_string("owner")
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--[[
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local sound = def.sound or "tnt_explode"
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minetest.sound_play(sound, {pos = pos, gain = 2.5,
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max_hear_distance = math.min(def.radius * 20, 128)}, true)
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--]]
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local drops, radius = tnt_explode(pos, def.radius, def.ignore_protection,
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def.ignore_on_blast, owner, def.explode_center)
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-- append entity drops
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local damage_radius = (radius / math.max(1, 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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--start node/entity logic
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minetest.register_entity("fl_tnt:tnt_entity", {
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initial_properties = {
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hp_max = 1,
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physical = true,
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collide_with_objects = true,
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collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
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visual = "cube",
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textures = {
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"farlands_tnt_top.png",
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"farlands_tnt_bottom.png",
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"farlands_tnt_side.png",
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"farlands_tnt_side.png",
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"farlands_tnt_side.png",
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"farlands_tnt_side.png",
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},
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--damage_texture_modifier = "^[brighten"
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},
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on_activate = function(self, staticdata, dtime_s)
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--self.object:setvelocity({x=0, y=4, z=0})
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self.object:set_acceleration({x=0, y=-10, z=0})
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self.object:set_texture_mod("^[brighten")
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self.object:set_armor_groups({immortal = 1})
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end,
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on_punch = function(self, puncher, time_from_last_punch, tool_capabilities, dir)
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if puncher:is_player() then self.object:remove() end
|
|
end,
|
|
timer = 0,
|
|
blinktimer = 0,
|
|
blinkstatus = true,
|
|
on_step = function(self, dtime, moveresult)
|
|
self.timer = self.timer + dtime
|
|
local mult = 1
|
|
if self.timer > 5 * 0.8 then -- blink faster before explosion
|
|
mult = 4
|
|
elseif self.timer > 5 * 0.5 then
|
|
mult = 2
|
|
end
|
|
self.blinktimer = self.blinktimer + mult * dtime
|
|
|
|
if self.blinktimer > 0.5 then -- actual blinking
|
|
self.blinktimer = self.blinktimer - 0.5
|
|
self.object:settexturemod(self.blinkstatus and "^[brighten" or "")
|
|
self.blinkstatus = not self.blinkstatus
|
|
end
|
|
|
|
if self.timer > 5 then -- boom!
|
|
fl_tnt.boom(vector.round(self.object:get_pos()))
|
|
self.object:remove()
|
|
end
|
|
end
|
|
|
|
})
|
|
|
|
minetest.register_node("fl_tnt:tnt", {
|
|
description = "tnt",
|
|
tiles = {"farlands_tnt_top.png", "farlands_tnt_bottom.png", "farlands_tnt_side.png"},
|
|
on_punch = function(pos, node, puncher)
|
|
if minetest.is_protected(pos, puncher:get_player_name()) then return end
|
|
minetest.remove_node(pos)
|
|
local entity = minetest.add_entity(pos, "fl_tnt:tnt_entity")
|
|
entity:set_velocity({x=0, y=4, z=0})
|
|
end,
|
|
on_ignite = function(pos, user)
|
|
if minetest.is_protected(pos, user:get_player_name()) then return end
|
|
minetest.remove_node(pos)
|
|
local entity = minetest.add_entity(pos, "fl_tnt:tnt_entity")
|
|
entity:set_velocity({x=0, y=4, z=0})
|
|
end,
|
|
groups = {snappy = 3},
|
|
}) |