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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.
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@ -33,8 +33,15 @@ local function check_wind_mill(pos)
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if pos.y < 30 then
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return false
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end
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pos = {x=pos.x, y=pos.y, z=pos.z}
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for i = 1, 20 do
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local node = minetest.get_node({x=pos.x, y=pos.y-i, z=pos.z})
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pos.y = pos.y - 1
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local node = minetest.get_node_or_nil(pos)
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if not node then
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-- we reached CONTENT_IGNORE, we can assume, that nothing changed
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-- as the user will have to load the block to change it
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return
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end
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if node.name ~= "technic:wind_mill_frame" then
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return false
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end
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@ -45,17 +52,17 @@ end
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local run = function(pos, node)
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local meta = minetest.get_meta(pos)
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local machine_name = S("Wind %s Generator"):format("MV")
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local power = math.min(pos.y * 100, 5000)
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if not check_wind_mill(pos) then
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local check = check_wind_mill(pos)
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if check == false then
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meta:set_int("MV_EU_supply", 0)
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meta:set_string("infotext", S("%s Improperly Placed"):format(machine_name))
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return
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else
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elseif check == true then
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local power = math.min(pos.y * 100, 5000)
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meta:set_int("MV_EU_supply", power)
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meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power)))
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end
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meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power)))
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-- check == nil: assume nothing has changed
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end
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minetest.register_node("technic:wind_mill", {
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