Add support for `group:supported_node`
* Add support for `group:supported_node` to CORE/mcl_attached. Supported nodes are nodes that can be placed on any node that does not have the `drawtype = "airlike"` attribute. * Copy the `drop_attached_node()` function from minetest/builtin, so that the override function provides the same behavior when nodes drop. * Add comments to CORE/mcl_attached and to the functions defined in it. * Add more local aliases for global minetest.* functions. * If the original function returns true, it is not necessary anymore to perform more tests and the override function can simply return true immediately.kulmapaikka
parent
81a1b9973a
commit
8518ce2c19
|
@ -1,29 +1,93 @@
|
|||
-- Overrides the builtin minetest.check_single_for_falling.
|
||||
-- We need to do this in order to handle nodes in mineclone specific groups
|
||||
-- "supported_node" and "attached_node_facedir".
|
||||
--
|
||||
-- Nodes in group "supported_node" can be placed on any node that does not
|
||||
-- have the "airlike" drawtype. Carpets are an example of this type.
|
||||
|
||||
local vector = vector
|
||||
|
||||
local facedir_to_dir = minetest.facedir_to_dir
|
||||
local get_item_group = minetest.get_item_group
|
||||
local remove_node = minetest.remove_node
|
||||
local get_node = minetest.get_node
|
||||
local get_meta = minetest.get_meta
|
||||
local registered_nodes = minetest.registered_nodes
|
||||
local get_node_drops = minetest.get_node_drops
|
||||
local add_item = minetest.add_item
|
||||
|
||||
-- drop_attached_node(p)
|
||||
--
|
||||
-- This function is copied verbatim from minetest/builtin/game/falling.lua
|
||||
-- We need this to do the exact same dropping node handling in our override
|
||||
-- minetest.check_single_for_falling() function as in the builtin function.
|
||||
--
|
||||
local function drop_attached_node(p)
|
||||
local n = get_node(p)
|
||||
local drops = get_node_drops(n, "")
|
||||
local def = registered_nodes[n.name]
|
||||
if def and def.preserve_metadata then
|
||||
local oldmeta = get_meta(p):to_table().fields
|
||||
-- Copy pos and node because the callback can modify them.
|
||||
local pos_copy = vector.new(p)
|
||||
local node_copy = {name=n.name, param1=n.param1, param2=n.param2}
|
||||
local drop_stacks = {}
|
||||
for k, v in pairs(drops) do
|
||||
drop_stacks[k] = ItemStack(v)
|
||||
end
|
||||
drops = drop_stacks
|
||||
def.preserve_metadata(pos_copy, node_copy, oldmeta, drops)
|
||||
end
|
||||
if def and def.sounds and def.sounds.fall then
|
||||
core.sound_play(def.sounds.fall, {pos = p}, true)
|
||||
end
|
||||
remove_node(p)
|
||||
for _, item in pairs(drops) do
|
||||
local pos = {
|
||||
x = p.x + math.random()/2 - 0.25,
|
||||
y = p.y + math.random()/2 - 0.25,
|
||||
z = p.z + math.random()/2 - 0.25,
|
||||
}
|
||||
add_item(pos, item)
|
||||
end
|
||||
end
|
||||
|
||||
-- minetest.check_single_for_falling(pos)
|
||||
--
|
||||
-- * causes an unsupported `group:falling_node` node to fall and causes an
|
||||
-- unattached `group:attached_node` or `group:attached_node_facedir` node
|
||||
-- or unsupported `group:supported_node` to drop.
|
||||
-- * does not spread these updates to neighbours.
|
||||
--
|
||||
-- Returns true if the node at <pos> has spawned a falling node or has been
|
||||
-- dropped as item(s).
|
||||
--
|
||||
local original_function = minetest.check_single_for_falling
|
||||
|
||||
function minetest.check_single_for_falling(pos)
|
||||
local ret_o = original_function(pos)
|
||||
local ret = false
|
||||
local node = minetest.get_node(pos)
|
||||
if original_function(pos) then
|
||||
return true
|
||||
end
|
||||
|
||||
local node = get_node(pos)
|
||||
if get_item_group(node.name, "attached_node_facedir") ~= 0 then
|
||||
local dir = facedir_to_dir(node.param2)
|
||||
if dir then
|
||||
if get_item_group(get_node(vector.add(pos, dir)).name, "solid") == 0 then
|
||||
remove_node(pos)
|
||||
local drops = minetest.get_node_drops(node.name, "")
|
||||
for dr=1, #drops do
|
||||
minetest.add_item(pos, drops[dr])
|
||||
end
|
||||
ret = true
|
||||
drop_attached_node(pos)
|
||||
return true
|
||||
end
|
||||
end
|
||||
end
|
||||
return ret_o or ret
|
||||
|
||||
if get_item_group(node.name, "supported_node") ~= 0 then
|
||||
local def = registered_nodes[get_node(vector.offset(pos, 0, -1, 0)).name]
|
||||
if def and def.drawtype == "airlike" then
|
||||
drop_attached_node(pos)
|
||||
return true
|
||||
end
|
||||
end
|
||||
|
||||
return false
|
||||
end
|
||||
|
||||
|
|
Loading…
Reference in New Issue