232 lines
7.7 KiB
Lua
232 lines
7.7 KiB
Lua
local function spawn_tnt(pos, entname)
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minetest.sound_play("tnt_ignite", {pos = pos,gain = 1.0,max_hear_distance = 15,})
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local tnt = minetest.add_entity(pos, entname)
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tnt:set_armor_groups({immortal=1})
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return tnt
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end
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local function activate_if_tnt(nname, np, tnt_np, tntr)
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if nname == "mcl_tnt:tnt" then
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local e = spawn_tnt(np, nname)
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e:setvelocity({x=(np.x - tnt_np.x)*5+(tntr / 4), y=(np.y - tnt_np.y)*5+(tntr / 3), z=(np.z - tnt_np.z)*5+(tntr / 4)})
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end
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end
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local function do_tnt_physics(tnt_np,tntr)
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local objs = minetest.get_objects_inside_radius(tnt_np, tntr)
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for k, obj in pairs(objs) do
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local oname = obj:get_entity_name()
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local v = obj:getvelocity()
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local p = obj:getpos()
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if oname == "mcl_tnt:tnt" then
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obj:setvelocity({x=(p.x - tnt_np.x) + (tntr / 2) + v.x, y=(p.y - tnt_np.y) + tntr + v.y, z=(p.z - tnt_np.z) + (tntr / 2) + v.z})
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else
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if v ~= nil then
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obj:setvelocity({x=(p.x - tnt_np.x) + (tntr / 4) + v.x, y=(p.y - tnt_np.y) + (tntr / 2) + v.y, z=(p.z - tnt_np.z) + (tntr / 4) + v.z})
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else
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local dist = math.max(1, vector.distance(tnt_np, p))
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local damage = (4 / dist) * tntr
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if obj:is_player() == true then
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mcl_death_messages.player_damage(obj, string.format("%s was caught in an explosion.", obj:get_player_name()))
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mcl_hunger.exhaust(obj:get_player_name(), mcl_hunger.EXHAUST_DAMAGE)
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end
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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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end
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tnt = {}
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tnt.ignite = function(pos)
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minetest.remove_node(pos)
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spawn_tnt(pos, "mcl_tnt:tnt")
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core.check_for_falling(pos)
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end
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local TNT_RANGE = 3
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minetest.register_node("mcl_tnt:tnt", {
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tiles = {"default_tnt_top.png", "default_tnt_bottom.png",
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"default_tnt_side.png", "default_tnt_side.png",
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"default_tnt_side.png", "default_tnt_side.png"},
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is_ground_content = false,
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stack_max = 64,
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description = "TNT",
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paramtype = "light",
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sunlight_propagates = true,
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_doc_items_longdesc = string.format("An explosive device. When it explodes, it will hurt living beings, destroy blocks around it, throw blocks affected by gravity all over the place and light fires. A single TNT has an explosion radius of %d. With a small chance, blocks may drop as an item (as if being mined) rather than being destroyed. TNT can be ignited by tools, explosions, fire, lava and redstone signals.", TNT_RANGE),
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_doc_items_usagehelp = "Place the TNT on the ground and ignite it with one of the methods above. Quickly get in safe distance quickly. The TNT will start to be affected by gravity and explodes in 4 seconds.",
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groups = { dig_immediate = 3, tnt = 1, enderman_takable=1 },
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mesecons = {effector = {
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action_on = tnt.ignite
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}},
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_on_ignite = function(pos, player)
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tnt.ignite(pos)
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end,
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sounds = mcl_sounds.node_sound_wood_defaults(),
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})
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local TNT = {
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-- Static definition
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physical = true, -- Collides with things
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--weight = -100,
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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 = {"default_tnt_top.png", "default_tnt_bottom.png",
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"default_tnt_side.png", "default_tnt_side.png",
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"default_tnt_side.png", "default_tnt_side.png"},
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-- Initial value for our timer
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timer = 0,
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blinktimer = 0,
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blinkstatus = true,}
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function TNT:on_activate(staticdata)
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self.object:setvelocity({x=0, y=4, z=0})
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self.object:setacceleration({x=0, y=-10, z=0})
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self.object:settexturemod("^mcl_tnt_blink.png")
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end
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local function add_effects(pos, radius, drops)
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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 * 1,
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maxsize = radius * 3,
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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_smoke.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 = 32,
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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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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:on_step(dtime)
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local pos = self.object:getpos()
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minetest.add_particle({
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pos = {x=pos.x,y=pos.y+0.5,z=pos.z},
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velocity = {x=math.random(-.1,.1),y=math.random(1,2),z=math.random(-.1,.1)},
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acceleration = {x=0,y=-0.1,z=0},
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expirationtime = math.random(.5,1),
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size = math.random(1,2),
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collisiondetection = false,
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texture = "tnt_smoke.png"
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})
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self.timer = self.timer + dtime
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self.blinktimer = self.blinktimer + dtime
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if self.blinktimer > 0.25 then
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self.blinktimer = self.blinktimer - 0.25
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if self.blinkstatus then
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self.object:settexturemod("")
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else
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self.object:settexturemod("^mcl_tnt_blink.png")
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end
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self.blinkstatus = not self.blinkstatus
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end
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if self.timer > 4 then
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tnt.boom(self.object:getpos())
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self.object:remove()
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end
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end
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tnt.boom = function(pos, info)
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if not info then info = {} end
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local range = info.radius or TNT_RANGE
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local damage_range = info.damage_radius or TNT_RANGE
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pos.x = math.floor(pos.x+0.5)
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pos.y = math.floor(pos.y+0.5)
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pos.z = math.floor(pos.z+0.5)
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do_tnt_physics(pos, range)
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local meta = minetest.get_meta(pos)
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local sound
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if not info.sound then
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sound = "tnt_explode"
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else
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sound = info.sound
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end
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minetest.sound_play(sound, {pos = pos,gain = 1.0,max_hear_distance = 16,})
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if minetest.get_node(pos).name == "mcl_core:water_source" or minetest.get_node(pos).name == "mcl_core:water_flowing" or minetest.get_node(pos).name == "mcl_core:bedrock" or minetest.get_node(pos).name == "protector:display" or minetest.is_protected(pos, "tnt") then
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-- Cancel the Explosion
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return
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end
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for x=-range,range do
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for y=-range,range do
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for z=-range,range do
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if x*x+y*y+z*z <= range * range + range then
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local np={x=pos.x+x,y=pos.y+y,z=pos.z+z}
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local n = minetest.get_node(np)
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local def = minetest.registered_nodes[n.name]
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-- Simple blast resistance check (for now). This keeps the important blocks like bedrock, command block, etc. intact.
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-- TODO: Implement the real blast resistance algorithm
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if def and n.name ~= "air" and n.name ~= "ignore" and (def._mcl_blast_resistance == nil or def._mcl_blast_resistance < 1000) then
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activate_if_tnt(n.name, np, pos, 3)
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minetest.remove_node(np)
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core.check_for_falling(np)
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if n.name ~= "mcl_tnt:tnt" and math.random() > 0.9 then
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local drop = minetest.get_node_drops(n.name, "")
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for _,item in ipairs(drop) do
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if type(item) == "string" then
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if math.random(1,100) > 40 then
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local obj = minetest.add_item(np, 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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end
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end
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end
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add_effects(pos, range, {})
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end
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end
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minetest.register_entity("mcl_tnt:tnt", TNT)
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minetest.register_craft({
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output = "mcl_tnt:tnt",
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recipe = {
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{'mcl_mobitems:gunpowder','group:sand','mcl_mobitems:gunpowder'},
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{'group:sand','mcl_mobitems:gunpowder','group:sand'},
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{'mcl_mobitems:gunpowder','group:sand','mcl_mobitems:gunpowder'}
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}
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})
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if minetest.get_modpath("doc_identifier") then
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doc.sub.identifier.register_object("mcl_tnt:tnt", "nodes", "mcl_tnt:tnt")
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end
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