290 lines
7.9 KiB
Lua
290 lines
7.9 KiB
Lua
-- Minetest: builtin/item_entity.lua (5th July 2015)
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function core.spawn_item(pos, item)
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-- Take item in any format
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local stack = ItemStack(item)
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local obj = core.add_entity(pos, "__builtin:item")
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obj:get_luaentity():set_item(stack:to_string())
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return obj
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end
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-- If item_entity_ttl is not set, enity will have default life time
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-- Setting it to -1 disables the feature
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local time_to_live = tonumber(core.setting_get("item_entity_ttl")) or 180 -- 3 mins
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-- If destroy_item is 1 then dropped items will burn inside lava
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local destroy_item = tonumber(core.setting_get("destroy_item")) or 1
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-- Particle effects when item removed
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local function add_effects(pos)
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minetest.add_particlespawner({
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amount = 1,
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time = 0.25,
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minpos = pos,
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maxpos = pos,
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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 = 3,
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minsize = 1,
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maxsize = 4,
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texture = "tnt_smoke.png",
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})
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end
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core.register_entity(":__builtin:item", {
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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 = false,
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collisionbox = {-0.3, -0.3, -0.3, 0.3, 0.3, 0.3},
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visual = "wielditem",
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visual_size = {x = 0.4, y = 0.4},
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textures = {""},
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spritediv = {x = 1, y = 1},
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initial_sprite_basepos = {x = 0, y = 0},
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is_visible = false,
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},
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itemstring = '',
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physical_state = true,
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age = 0,
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set_item = function(self, itemstring)
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self.itemstring = itemstring
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local stack = ItemStack(itemstring)
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local count = stack:get_count()
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local max_count = stack:get_stack_max()
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if count > max_count then
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count = max_count
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self.itemstring = stack:get_name().." "..max_count
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end
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local s = 0.2 + 0.1 * (count / max_count)
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local c = s
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local itemtable = stack:to_table()
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local itemname = nil
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if itemtable then
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itemname = stack:to_table().name
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end
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local item_texture = nil
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local item_type = ""
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if core.registered_items[itemname] then
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item_texture = core.registered_items[itemname].inventory_image
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item_type = core.registered_items[itemname].type
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end
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local prop = {
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is_visible = true,
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visual = "wielditem",
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textures = {itemname},
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visual_size = {x = s, y = s},
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collisionbox = {-c, -c, -c, c, c, c},
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automatic_rotate = math.pi * 0.5,
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}
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self.object:set_properties(prop)
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end,
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get_staticdata = function(self)
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return core.serialize({
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itemstring = self.itemstring,
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always_collect = self.always_collect,
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age = self.age
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})
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end,
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on_activate = function(self, staticdata, dtime_s)
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if string.sub(staticdata, 1, string.len("return")) == "return" then
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local data = core.deserialize(staticdata)
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if data and type(data) == "table" then
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self.itemstring = data.itemstring
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self.always_collect = data.always_collect
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if data.age then
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self.age = data.age + dtime_s
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else
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self.age = dtime_s
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end
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end
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else
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self.itemstring = staticdata
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end
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self.object:set_armor_groups({immortal = 1})
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self.object:setvelocity({x = 0, y = 2, z = 0})
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self.object:setacceleration({x = 0, y = -10, z = 0})
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self:set_item(self.itemstring)
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end,
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try_merge_with = function(self, own_stack, object, obj)
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local stack = ItemStack(obj.itemstring)
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if own_stack:get_name() == stack:get_name() and stack:get_free_space() > 0 then
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local overflow = false
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local count = stack:get_count() + own_stack:get_count()
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local max_count = stack:get_stack_max()
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if count > max_count then
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overflow = true
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count = count - max_count
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else
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self.itemstring = ''
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end
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local pos = object:getpos()
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pos.y = pos.y + (count - stack:get_count()) / max_count * 0.15
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object:moveto(pos, false)
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local s, c
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local max_count = stack:get_stack_max()
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local name = stack:get_name()
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if not overflow then
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obj.itemstring = name .. " " .. count
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s = 0.2 + 0.1 * (count / max_count)
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c = s
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object:set_properties({
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visual_size = {x = s, y = s},
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collisionbox = {-c, -c, -c, c, c, c}
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})
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self.object:remove()
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-- merging succeeded
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return true
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else
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s = 0.4
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c = 0.3
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object:set_properties({
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visual_size = {x = s, y = s},
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collisionbox = {-c, -c, -c, c, c, c}
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})
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obj.itemstring = name .. " " .. max_count
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s = 0.2 + 0.1 * (count / max_count)
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c = s
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self.object:set_properties({
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visual_size = {x = s, y = s},
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collisionbox = {-c, -c, -c, c, c, c}
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})
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self.itemstring = name .. " " .. count
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end
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end
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-- merging didn't succeed
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return false
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end,
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on_step = function(self, dtime)
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self.age = self.age + dtime
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if time_to_live > 0 and self.age > time_to_live then
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self.itemstring = ''
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add_effects(self.object:getpos())
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self.object:remove()
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return
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end
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local p = self.object:getpos()
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p.y = p.y - 0.5
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local node = core.get_node_or_nil(p)
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local in_unloaded = (node == nil)
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if in_unloaded then
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-- Don't infinetly fall into unloaded map
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self.object:setvelocity({x = 0, y = 0, z = 0})
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self.object:setacceleration({x = 0, y = 0, z = 0})
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self.physical_state = false
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self.object:set_properties({physical = false})
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return
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end
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local nn = node.name
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-- If item drops into lava then destroy if enabled
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if destroy_item > 0 and minetest.get_item_group(nn, "lava") > 0 then
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minetest.sound_play("builtin_item_lava", {
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pos = p,
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max_hear_distance = 6,
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gain = 0.5
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})
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self.object:remove()
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add_effects(p)
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return
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end
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p.y = p.y + 0.5
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-- Flowing water pushes item along
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local nod = minetest.get_node_or_nil(p)
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if nod and minetest.registered_nodes[nod.name].liquidtype == "flowing" then
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local pos = self.object:getpos()
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pos = vector.round(pos)
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local p2 = node.param2
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if p2 > 6 then p2 = 0 end
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local v = self.object:getvelocity()
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nod = minetest.get_node({x = pos.x + 1, y = pos.y, z = pos.z})
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if minetest.registered_nodes[nod.name].liquidtype == "flowing"
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and nod.param2 < p2 and nod.param2 < 7 then
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v.x = 0.8
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end
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nod = minetest.get_node({x = pos.x - 1, y = pos.y, z = pos.z})
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if minetest.registered_nodes[nod.name].liquidtype == "flowing"
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and nod.param2 < p2 and nod.param2 < 7 then
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v.x = -0.8
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end
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nod = minetest.get_node({x = pos.x, y = pos.y, z = pos.z + 1})
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if minetest.registered_nodes[nod.name].liquidtype == "flowing"
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and nod.param2 < p2 and nod.param2 < 7 then
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v.z = 0.8
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end
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nod = minetest.get_node({x = pos.x, y = pos.y, z = pos.z - 1})
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if minetest.registered_nodes[nod.name].liquidtype == "flowing"
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and nod.param2 < p2 and nod.param2 < 7 then
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v.z = -0.8
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end
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self.object:setvelocity(v)
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return
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end
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p.y = p.y - 0.5
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-- If node is not registered or node is walkably solid and resting on nodebox
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if not core.registered_nodes[nn]
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or core.registered_nodes[nn].walkable
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and self.object:getvelocity().y == 0 then
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if self.physical_state then
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local own_stack = ItemStack(self.object:get_luaentity().itemstring)
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-- Merge with close entities of the same item
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for _, object in ipairs(core.get_objects_inside_radius(p, 1.0)) do
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local obj = object:get_luaentity()
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if obj and obj.name == "__builtin:item"
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and obj.physical_state == false then
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if self:try_merge_with(own_stack, object, obj) then
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return
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end
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end
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end
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self.object:setvelocity({x = 0, y = 0, z = 0})
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self.object:setacceleration({x = 0, y = 0, z = 0})
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self.physical_state = false
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self.object:set_properties({physical = false})
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end
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else
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if not self.physical_state then
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self.object:setvelocity({x = 0, y = 0, z = 0})
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self.object:setacceleration({x = 0, y = -10, z = 0})
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self.physical_state = true
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self.object:set_properties({physical = true})
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end
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end
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end,
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on_punch = function(self, hitter)
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if self.itemstring ~= '' then
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local left = hitter:get_inventory():add_item("main", self.itemstring)
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if not left:is_empty() then
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self.itemstring = left:to_string()
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return
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end
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end
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self.itemstring = ''
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self.object:remove()
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end,
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}) |