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Handle CONTENT_IGNORE when checking windmill conditions. 

Windmills always span more than one mapblock, so even with a switching station next to the generators, they will stop working if unloaded due to the windmill check failing to handle CONTENT_IGNORE of the frames at the foot of the windmill, unless a second switching station would be placed there.

The commit assumes, that a user has to load a block to modify it, and thus unloaded blocks to have the same windmill frame state as before.
This also makes technic_run for windmills a little faster by being able to skip some unnecessary node lookups and generally avoiding creation of 20 tables per windmill per step.
This commit is contained in:
Tim 2016-09-03 16:29:14 +02:00 committed by ShadowNinja
parent 1475ee6e40
commit d39797aad8
1 changed files with 14 additions and 7 deletions
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21
technic/machines/MV/wind_mill.lua
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@ -33,8 +33,15 @@ local function check_wind_mill(pos)
if pos.y < 30 then
return false
end
pos = {x=pos.x, y=pos.y, z=pos.z}
for i = 1, 20 do
local node = minetest.get_node({x=pos.x, y=pos.y-i, z=pos.z})
pos.y = pos.y - 1
local node = minetest.get_node_or_nil(pos)
if not node then
-- we reached CONTENT_IGNORE, we can assume, that nothing changed
-- as the user will have to load the block to change it
return
end
if node.name ~= "technic:wind_mill_frame" then
return false
end
@ -45,17 +52,17 @@ end
local run = function(pos, node)
local meta = minetest.get_meta(pos)
local machine_name = S("Wind %s Generator"):format("MV")
local power = math.min(pos.y * 100, 5000)
if not check_wind_mill(pos) then
local check = check_wind_mill(pos)
if check == false then
meta:set_int("MV_EU_supply", 0)
meta:set_string("infotext", S("%s Improperly Placed"):format(machine_name))
return
else
elseif check == true then
local power = math.min(pos.y * 100, 5000)
meta:set_int("MV_EU_supply", power)
meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power)))
end
meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power)))
-- check == nil: assume nothing has changed
end
minetest.register_node("technic:wind_mill", {