forked from Mirrorlandia_minetest/minetest
Builtin item: Tidy up (#4370)
New code structure Use setting movement_gravity Reset age on merge Set merge radius to 1.0m
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SmallJoker
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@ -14,10 +14,9 @@ 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.settings:get("item_entity_ttl"))
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if not time_to_live then
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time_to_live = 900
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end
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local time_to_live = tonumber(core.settings:get("item_entity_ttl")) or 900
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local gravity = tonumber(core.settings:get("movement_gravity")) or 9.81
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core.register_entity(":__builtin:item", {
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initial_properties = {
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@ -33,50 +32,42 @@ core.register_entity(":__builtin:item", {
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is_visible = false,
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},
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itemstring = '',
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itemstring = "",
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physical_state = true,
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slippery_state = false,
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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 stack = ItemStack(itemstring or self.itemstring)
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self.itemstring = stack:to_string()
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-- Backwards compatibility: old clients use the texture
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-- to get the type of the item
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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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local itemname = stack:get_name()
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local max_count = stack:get_stack_max()
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local count = math.min(stack:get_count(), max_count)
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local size = 0.2 + 0.1 * (count / max_count)
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if not stack:is_known() then
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itemname = "unknown"
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end
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local prop = {
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self.object:set_properties({
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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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visual_size = {x = size, y = size},
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collisionbox = {-size, -size, -size, size, size, size},
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automatic_rotate = math.pi * 0.5,
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wield_item = itemstring,
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}
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self.object:set_properties(prop)
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wield_item = self.itemstring,
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})
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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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dropped_by = self.dropped_by
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})
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@ -87,12 +78,7 @@ core.register_entity(":__builtin:item", {
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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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self.age = (data.age or 0) + dtime_s
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self.dropped_by = data.dropped_by
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end
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else
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@ -100,127 +86,122 @@ core.register_entity(":__builtin:item", {
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end
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self.object:set_armor_groups({immortal = 1})
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self.object:set_velocity({x = 0, y = 2, z = 0})
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self.object:set_acceleration({x = 0, y = -10, z = 0})
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self:set_item(self.itemstring)
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self.object:set_acceleration({x = 0, y = -gravity, z = 0})
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self:set_item()
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end,
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-- moves items from this stack to an other stack
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try_merge_with = function(self, own_stack, object, obj)
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-- other item's stack
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local stack = ItemStack(obj.itemstring)
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-- only merge if items are the same
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if own_stack:get_name() == stack:get_name() and
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own_stack:get_meta() == stack:get_meta() and
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own_stack:get_wear() == stack:get_wear() and
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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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stack:set_count(max_count)
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count = count - max_count
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own_stack:set_count(count)
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else
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self.itemstring = ''
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stack:set_count(count)
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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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if not overflow then
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obj.itemstring = stack:to_string()
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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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wield_item = obj.itemstring
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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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obj.itemstring = stack:to_string()
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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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wield_item = obj.itemstring
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})
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s = 0.2 + 0.1 * (count / max_count)
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c = s
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self.itemstring = own_stack:to_string()
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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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wield_item = self.itemstring
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})
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end
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try_merge_with = function(self, own_stack, object, entity)
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if self.age == entity.age then
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-- Can not merge with itself
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return false
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end
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-- merging didn't succeed
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return false
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local stack = ItemStack(entity.itemstring)
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local name = stack:get_name()
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if own_stack:get_name() ~= name or
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own_stack:get_meta() ~= stack:get_meta() or
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own_stack:get_wear() ~= stack:get_wear() or
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own_stack:get_free_space() == 0 then
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-- Can not merge different or full stack
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return false
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end
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local count = own_stack:get_count()
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local total_count = stack:get_count() + count
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local max_count = stack:get_stack_max()
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if total_count > max_count then
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return false
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end
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-- Merge the remote stack into this one
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local pos = object:get_pos()
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pos.y = pos.y + ((total_count - count) / max_count) * 0.15
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self.object:move_to(pos)
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self.age = 0 -- Handle as new entity
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own_stack:set_count(total_count)
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self:set_item(own_stack)
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entity.itemstring = ""
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object:remove()
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return true
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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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self.itemstring = ""
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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:set_velocity({x = 0, y = 0, z = 0})
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self.object:set_acceleration({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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local pos = self.object:get_pos()
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local node = core.get_node_or_nil({
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x = pos.x,
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y = pos.y + self.object:get_properties().collisionbox[2] - 0.05,
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z = pos.z
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})
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local vel = self.object:getvelocity()
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local def = node and core.registered_nodes[node.name]
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-- Ignore is nil -> stop until the block loaded
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local is_physical = (def and not def.walkable) or vel.y ~= 0
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local is_slippery = false
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if def and def.walkable and
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(math.abs(vel.x) > 0.2 or math.abs(vel.z) > 0.2) then
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local slippery = core.get_item_group(node.name, "slippery")
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is_slippery = slippery ~= 0
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if is_slippery then
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is_physical = true
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-- Horizontal deceleration
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local slip_factor = 4.0 / (slippery + 4)
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self.object:set_acceleration({
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x = -vel.x * slip_factor,
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y = 0,
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z = -vel.z * slip_factor
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})
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end
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end
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if self.physical_state == is_physical and
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self.slippery_state == is_slippery then
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-- Do not update anything until the physical state changes
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return
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end
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local nn = node.name
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-- If node is not registered or node is walkably solid and resting on nodebox
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local v = self.object:getvelocity()
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if not core.registered_nodes[nn] or (core.registered_nodes[nn].walkable and
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core.get_item_group(nn, "slippery") == 0) and v.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, 0.8)) 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:set_velocity({x = 0, y = 0, z = 0})
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self.object:set_acceleration({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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self.physical_state = is_physical
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self.slippery_state = is_slippery
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self.object:set_properties({
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physical = is_physical
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})
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if is_slippery then
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return
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end
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if is_physical then
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self.object:set_acceleration({x = 0, y = -gravity, z = 0})
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else
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if not self.physical_state then
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self.object:set_velocity({x = 0, y = 0, z = 0})
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self.object:set_acceleration({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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elseif minetest.get_item_group(nn, "slippery") ~= 0 then
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if math.abs(v.x) < 0.2 and math.abs(v.z) < 0.2 then
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self.object:set_velocity({x = 0, y = 0, z = 0})
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self.object:set_acceleration({x = 0, y = 0, z = 0})
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self.physical_state = false
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self.object:set_properties({
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physical = false
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})
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else
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self.object:set_acceleration({x = -v.x, y = -10, z = -v.z})
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self.object:set_acceleration({x = 0, y = 0, z = 0})
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self.object:set_velocity({x = 0, y = 0, z = 0})
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end
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-- Collect the items around to merge with
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local own_stack = ItemStack(self.itemstring)
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if own_stack:get_free_space() == 0 then
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return
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end
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local objects = core.get_objects_inside_radius(pos, 1.0)
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for k, obj in pairs(objects) do
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local entity = obj:get_luaentity()
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if entity and entity.name == "__builtin:item" then
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if self:try_merge_with(own_stack, obj, entity) then
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own_stack = ItemStack(self.itemstring)
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if own_stack:get_free_space() == 0 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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end
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@ -228,14 +209,14 @@ core.register_entity(":__builtin:item", {
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on_punch = function(self, hitter)
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local inv = hitter:get_inventory()
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if inv and self.itemstring ~= '' then
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if inv and self.itemstring ~= "" then
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local left = inv:add_item("main", self.itemstring)
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if left and not left:is_empty() then
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self.itemstring = left:to_string()
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self:set_item(left)
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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.itemstring = ""
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self.object:remove()
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end,
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})
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