forked from mtcontrib/pipeworks
flowing_logic.lua: implement initital pressure balancing behaviour
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@ -133,10 +133,52 @@ pipeworks.fountainhead_check = function(pos, node)
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end
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end
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local debuglog = function(msg)
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print("## pipeworks: "..msg)
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-- borrowed from above: might be useable to replace the above coords tables
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local make_coords_offsets = function(pos, include_base)
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local coords = {
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{x=pos.x,y=pos.y-1,z=pos.z},
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{x=pos.x,y=pos.y+1,z=pos.z},
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{x=pos.x-1,y=pos.y,z=pos.z},
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{x=pos.x+1,y=pos.y,z=pos.z},
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{x=pos.x,y=pos.y,z=pos.z-1},
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{x=pos.x,y=pos.y,z=pos.z+1},
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}
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if include_base then table.insert(coords, pos) end
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return coords
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end
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local label_pressure = "pipeworks.water_pressure"
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local label_haspressure = "pipeworks.is_pressure_node"
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pipeworks.balance_pressure = function(pos, node)
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debuglog("balance_pressure() stub! "..node.name.." at "..pos.x.." "..pos.y.." "..pos.z)
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-- debuglog("balance_pressure() "..node.name.." at "..pos.x.." "..pos.y.." "..pos.z)
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-- check the pressure of all nearby nodes, and average it out.
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-- for the moment, only balance neighbour nodes if it already has a pressure value.
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-- XXX: maybe this could be used to add fluid behaviour to other mod's nodes too?
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-- unconditionally include self in nodes to average over
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local meta = minetest.get_meta(pos)
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local currentpressure = meta:get_float(label_pressure)
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meta:set_int(label_haspressure, 1)
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local connections = { meta }
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local totalv = currentpressure
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local totalc = 1
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-- then handle neighbours, but if not a pressure node don't consider them at all
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for _, npos in ipairs(make_coords_offsets(pos, false)) do
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local neighbour = minetest.get_meta(npos)
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local haspressure = (neighbour:get_int(label_haspressure) ~= 0)
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if haspressure then
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local n = neighbour:get_float(label_pressure)
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table.insert(connections, neighbour)
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totalv = totalv + n
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totalc = totalc + 1
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end
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end
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local average = totalv / totalc
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for _, targetmeta in ipairs(connections) do
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targetmeta:set_float(label_pressure, average)
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end
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end
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