MineClone2/mods/CORE/mcl_autogroup/init.lua

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--[[ This mod automatically adds groups to items based on item metadata.
Specifically, this mod has 2 purposes:
1) Automatically adding the group solid for blocks considered solid in Minecraft.
2) Generating digging time group for all nodes based on node metadata (it's complicated)
]]
--[[ Mining times. Yeah, mining times … Alright, this is going to be FUN!
This mod does include a HACK to make 100% sure the digging times of all tools match Minecraft's perfectly.
The digging times system of Minetest is very different, so this weird group trickery has to be used.so this weird group trickery has to be used.so this weird group trickery has to be used.so this weird group trickery has to be used.
In Minecraft, each block has a hardness and the actual Minecraft digging time is determined by this:
1) The block's hardness
2) The tool being used
3) Whether the tool is considered as eligible for the block
(e.g. only diamond pick eligible for obsidian)
See Minecraft Wiki <http://minecraft.gamepedia.com/Minecraft_Wiki> for more information.
In MineClone 2, all diggable node have the hardness set in the custom field _mcl_hardness (0 by default).
The nodes are also required to specify the eligible tools in groups like pickaxey, shovely, etc.
This mod then calculates the real digging time based on the node meta data. The real digging times
are then added into mcl_autogroup.digtimes where the table indices are group rating and the values are the
digging times in seconds. These digging times can be then added verbatim into the tool definitions.
Example:
mcl_autogroup.digtimes.pickaxey_dig_diamond[1] = 0.2
This menas that when a node has been assigned the group pickaxey_dig_diamond=1, it can be dug by the
diamond pickaxe in 0.2 seconds.
This strange setup with mcl_autogroup has been done to minimize the amount of required digging times
a single tool needs to use. If this is not being done, the loading time will increase considerably
(>10s).
]]
local materials = { "wood", "gold", "stone", "iron", "diamond" }
local material_divisors = { 2, 12, 4, 6, 8 }
local basegroups = { "pickaxey", "axey", "shovely" }
local minigroups = { "handy", "shearsy", "swordy" }
mcl_autogroup = {}
mcl_autogroup.digtimes = {}
for m=1, #materials do
for g=1, #basegroups do
mcl_autogroup.digtimes[basegroups[g].."_dig_"..materials[m]] = {}
end
end
for g=1, #minigroups do
mcl_autogroup.digtimes[minigroups[g].."_dig"] = {}
end
local overwrite = function()
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for nname, ndef in pairs(minetest.registered_nodes) do
local groups_changed = false
local newgroups = table.copy(ndef.groups)
if (nname ~= "ignore") then
-- Automatically assign the “solid” group for solid nodes
if (ndef.walkable == nil or ndef.walkable == true)
and (ndef.collision_box == nil or ndef.collision_box.type == "regular")
and (ndef.node_box == nil or ndef.node_box.type == "regular")
and (ndef.groups.falling_node == 0 or ndef.groups.falling_node == nil)
and (ndef.groups.not_solid == 0 or ndef.groups.not_solid == nil) then
newgroups.solid = 1
groups_changed = true
end
-- Hack in digging times
local hardness = ndef._mcl_hardness
if not hardness then
hardness = 0
end
-- Handle pickaxey, axey and shovely, and also handy indirectly
for _, basegroup in pairs(basegroups) do
if (hardness ~= -1 and ndef.groups[basegroup]) then
for g=1,#materials do
local diggroup = basegroup.."_dig_"..materials[g]
local time, validity_factor
if g >= ndef.groups[basegroup] then
-- Valid tool
validity_factor = 1.5
else
-- Wrong tool (higher digging time)
validity_factor = 5
end
time = (hardness * validity_factor) / material_divisors[g]
if time <= 0.05 then
time = 1
else
time = math.ceil(time * 20) / 20
end
table.insert(mcl_autogroup.digtimes[diggroup], time)
newgroups[diggroup] = #mcl_autogroup.digtimes[diggroup]
groups_changed = true
end
if not ndef.groups.handy then
local time = hardness * 5
if time <= 0.05 then
time = 0
else
time = math.ceil(time * 20) / 20
end
table.insert(mcl_autogroup.digtimes.handy_dig, time)
newgroups.handy_dig = #mcl_autogroup.digtimes.handy_dig
groups_changed = true
end
end
end
if groups_changed then
minetest.override_item(nname, {
groups = newgroups
})
end
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end
end
end
overwrite()