Add "Registered definitions of stuff" to doc/lua_api.txt

master
Perttu Ahola 2012-04-14 11:24:18 +03:00
parent 24603d7ad3
commit 9c5cc217bf
1 changed files with 43 additions and 3 deletions

View File

@ -192,6 +192,48 @@ eg. {}
eg. {name="default_place_node"} eg. {name="default_place_node"}
eg. {name="default_place_node", gain=1.0} eg. {name="default_place_node", gain=1.0}
Registered definitions of stuff
--------------------------------
Anything added using certain minetest.register_* functions get added to
the global minetest.registered_* tables.
minetest.register_entity(name, prototype table)
-> minetest.registered_entities[name]
minetest.register_node(name, node definition)
-> minetest.registered_items[name]
-> minetest.registered_nodes[name]
minetest.register_tool(name, item definition)
-> minetest.registered_items[name]
minetest.register_craftitem(name, item definition)
-> minetest.registered_items[name]
Note that in some cases you will stumble upon things that are not contained
in these tables (eg. when a mod has been removed). Always check for
existence before trying to access the fields.
Example: If you want to check the drawtype of a node, you could do:
local function get_nodedef_field(nodename, fieldname)
if not minetest.registered_nodes[nodename] then
return nil
end
return minetest.registered_nodes[nodename][fieldname]
end
local drawtype = get_nodedef_field(nodename, "drawtype")
Example: minetest.get_item_group(name, group) has been implemented as:
function minetest.get_item_group(name, group)
if not minetest.registered_items[name] or not
minetest.registered_items[name].groups[group] then
return 0
end
return minetest.registered_items[name].groups[group]
end
Nodes Nodes
------ ------
Nodes are the bulk data of the world: cubes and other things that take the Nodes are the bulk data of the world: cubes and other things that take the
@ -200,9 +242,7 @@ are quite static.
The definition of a node is stored and can be accessed by name in The definition of a node is stored and can be accessed by name in
minetest.registered_nodes[node.name] minetest.registered_nodes[node.name]
See "Registered definitions of stuff".
Please note that for unknown nodes (eg. a node of an uninstalled mod) the
minetest.registered_nodes field for the node is nil.
Nodes are passed by value between Lua and the engine. Nodes are passed by value between Lua and the engine.
They are represented by a table: They are represented by a table: