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flowing_logic.lua: add start of new pump handler code

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thetaepsilon-gamedev 2017-09-27 16:02:30 +01:00
parent 6a0fe9f3c0
commit c5e5aa069f
1 changed files with 20 additions and 0 deletions
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20
flowing_logic.lua
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@ -135,6 +135,14 @@ end
-- global values and thresholds for water behaviour
-- TODO: add some way of setting this per-world
local thresholds = {}
-- limit on pump pressure - will not absorb more than can be taken
thresholds.pump_pressure = 2
-- borrowed from above: might be useable to replace the above coords tables -- borrowed from above: might be useable to replace the above coords tables
local make_coords_offsets = function(pos, include_base) local make_coords_offsets = function(pos, include_base)
local coords = { local coords = {
@ -155,6 +163,7 @@ end
-- accepts a limit parameter to only delete water blocks that the receptacle can accept, -- accepts a limit parameter to only delete water blocks that the receptacle can accept,
-- and returns it so that the receptacle can update it's pressure values. -- and returns it so that the receptacle can update it's pressure values.
-- this should ensure that water blocks aren't vanished from existance. -- this should ensure that water blocks aren't vanished from existance.
-- will take care of zero or negative-valued limits.
pipeworks.check_for_liquids_v2 = function(pos, limit) pipeworks.check_for_liquids_v2 = function(pos, limit)
if not limit then if not limit then
limit = 6 limit = 6
@ -207,3 +216,14 @@ pipeworks.balance_pressure = function(pos, node)
targetmeta:set_float(label_pressure, average) targetmeta:set_float(label_pressure, average)
end end
end end
pipeworks.run_pump_intake = function(pos, node)
-- try to absorb nearby water nodes, but only up to limit.
-- NB: check_for_liquids_v2 handles zero or negative from the following subtraction
local meta = minetest.get_meta(pos)
local currentpressure = meta:get_float(label_pressure)
local intake_limit = thresholds.pump_pressure - currentpressure
local actual_intake = pipeworks.check_for_liquids_v2(pos, limit)
local newpressure = actual_intake + currentpressure
meta:set_float(label_pressure, newpressure)
end