advtrains.git - Advtrains mod for minetest.

	Commit message (Expand)	Author	Age
*	Track can-dig check: also notify user when digging is not allowed	orwell96	2021-03-12
*	Forbid track modification when train, IP or TCB is on it, better handle remov...	orwell96	2020-10-07
*	Don't allow wagons with non-empty inventories to be destroyed (H#164)	orwell96	2020-10-07
*	[BREAKING] Use client-side translations instead of intllib; add zh_CN transla...	ywang	2020-07-19
*	Remove zip release files, move mod to root, exclude assets from Makefile (#92)	rubenwardy	2017-09-20

-- Minetest: builtin/item_entity.lua function core.spawn_item(pos, item) -- Take item in any format local stack = ItemStack(item) local obj = core.add_entity(pos, "__builtin:item") -- Don't use obj if it couldn't be added to the map. if obj then obj:get_luaentity():set_item(stack:to_string()) end return obj end -- If item_entity_ttl is not set, enity will have default life time -- Setting it to -1 disables the feature local time_to_live = tonumber(core.settings:get("item_entity_ttl")) or 900 local gravity = tonumber(core.settings:get("movement_gravity")) or 9.81 core.register_entity(":__builtin:item", { initial_properties = { hp_max = 1, physical = true, collide_with_objects = false, collisionbox = {-0.3, -0.3, -0.3, 0.3, 0.3, 0.3}, visual = "wielditem", visual_size = {x = 0.4, y = 0.4}, textures = {""}, spritediv = {x = 1, y = 1}, initial_sprite_basepos = {x = 0, y = 0}, is_visible = false, }, itemstring = "", physical_state = true, slippery_state = false, age = 0, set_item = function(self, item) local stack = ItemStack(item or self.itemstring) self.itemstring = stack:to_string() if self.itemstring == "" then -- item not yet known return end -- Backwards compatibility: old clients use the texture -- to get the type of the item local itemname = stack:is_known() and stack:get_name() or "unknown" local max_count = stack:get_stack_max() local count = math.min(stack:get_count(), max_count) local size = 0.2 + 0.1 * (count / max_count) ^ (1 / 3) local coll_height = size * 0.75 self.object:set_properties({ is_visible = true, visual = "wielditem", textures = {itemname}, visual_size = {x = size, y = size}, collisionbox = {-size, -coll_height, -size, size, coll_height, size}, selectionbox = {-size, -size, -size, size, size, size}, automatic_rotate = math.pi * 0.5 * 0.2 / size, wield_item = self.itemstring, }) end, get_staticdata = function(self) return core.serialize({ itemstring = self.itemstring, age = self.age, dropped_by = self.dropped_by }) end, on_activate = function(self, staticdata, dtime_s) if string.sub(staticdata, 1, string.len("return")) == "return" then local data = core.deserialize(staticdata) if data and type(data) == "table" then self.itemstring = data.itemstring self.age = (data.age or 0) + dtime_s self.dropped_by = data.dropped_by end else self.itemstring = staticdata end self.object:set_armor_groups({immortal = 1}) self.object:set_velocity({x = 0, y = 2, z = 0}) self.object:set_acceleration({x = 0, y = -gravity, z = 0}) self:set_item() end, try_merge_with = function(self, own_stack, object, entity) if self.age == entity.age then -- Can not merge with itself return false end local stack = ItemStack(entity.itemstring) local name = stack:get_name() if own_stack:get_name() ~= name or own_stack:get_meta() ~= stack:get_meta() or own_stack:get_wear() ~= stack:get_wear() or own_stack:get_free_space() == 0 then -- Can not merge different or full stack return false end local count = own_stack:get_count() local total_count = stack:get_count() + count local max_count = stack:get_stack_max() if total_count > max_count then return false end -- Merge the remote stack into this one local pos = object:get_pos() pos.y = pos.y + ((total_count - count) / max_count) * 0.15 self.object:move_to(pos) self.age = 0 -- Handle as new entity own_stack:set_count(total_count) self:set_item(own_stack) entity.itemstring = "" object:remove() return true end, on_step = function(self, dtime) self.age = self.age + dtime if time_to_live > 0 and self.age > time_to_live then self.itemstring = "" self.object:remove() return end local pos = self.object:get_pos() local node = core.get_node_or_nil({ x = pos.x, y = pos.y + self.object:get_properties().collisionbox[2] - 0.05, z = pos.z }) local vel = self.object:getvelocity() local def = node and core.registered_nodes[node.name] -- Ignore is nil -> stop until the block loaded local is_physical = (def and not def.walkable) or vel.y ~= 0 local is_slippery = false if def and def.walkable and (math.abs(vel.x) > 0.2 or math.abs(vel.z) > 0.2) then local slippery = core.get_item_group(node.name, "slippery") is_slippery = slippery ~= 0 if is_slippery then is_physical = true -- Horizontal deceleration local slip_factor = 4.0 / (slippery + 4) self.object:set_acceleration({ x = -vel.x * slip_factor, y = 0, z = -vel.z * slip_factor }) end end if self.physical_state == is_physical and self.slippery_state == is_slippery then -- Do not update anything until the physical state changes return end self.physical_state = is_physical self.slippery_state = is_slippery self.object:set_properties({ physical = is_physical }) if is_slippery then return end if is_physical then self.object:set_acceleration({x = 0, y = -gravity, z = 0}) else self.object:set_acceleration({x = 0, y = 0, z = 0}) self.object:set_velocity({x = 0, y = 0, z = 0}) end -- Collect the items around to merge with local own_stack = ItemStack(self.itemstring) if own_stack:get_free_space() == 0 then return end local objects = core.get_objects_inside_radius(pos, 1.0) for k, obj in pairs(objects) do local entity = obj:get_luaentity() if entity and entity.name == "__builtin:item" then if self:try_merge_with(own_stack, obj, entity) then own_stack = ItemStack(self.itemstring) if own_stack:get_free_space() == 0 then return end end end end end, on_punch = function(self, hitter) local inv = hitter:get_inventory() if inv and self.itemstring ~= "" then local left = inv:add_item("main", self.itemstring) if left and not left:is_empty() then self:set_item(left) return end end self.itemstring = "" self.object:remove() end, })