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flowing_logic.lua: implement initital pressure balancing behaviour

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thetaepsilon-gamedev
2017-09-27 14:59:25 +01:00
parent f82570f580
commit 64a5b18e89
1 changed files with 45 additions and 3 deletions
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48
flowing_logic.lua
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@@ -133,10 +133,52 @@ pipeworks.fountainhead_check = function(pos, node)
end
end
local debuglog = function(msg)
print("## pipeworks: "..msg)
-- borrowed from above: might be useable to replace the above coords tables
local make_coords_offsets = function(pos, include_base)
local coords = {
{x=pos.x,y=pos.y-1,z=pos.z},
{x=pos.x,y=pos.y+1,z=pos.z},
{x=pos.x-1,y=pos.y,z=pos.z},
{x=pos.x+1,y=pos.y,z=pos.z},
{x=pos.x,y=pos.y,z=pos.z-1},
{x=pos.x,y=pos.y,z=pos.z+1},
}
if include_base then table.insert(coords, pos) end
return coords
end
local label_pressure = "pipeworks.water_pressure"
local label_haspressure = "pipeworks.is_pressure_node"
pipeworks.balance_pressure = function(pos, node)
debuglog("balance_pressure() stub! "..node.name.." at "..pos.x.." "..pos.y.." "..pos.z)
-- debuglog("balance_pressure() "..node.name.." at "..pos.x.." "..pos.y.." "..pos.z)
-- check the pressure of all nearby nodes, and average it out.
-- for the moment, only balance neighbour nodes if it already has a pressure value.
-- XXX: maybe this could be used to add fluid behaviour to other mod's nodes too?
-- unconditionally include self in nodes to average over
local meta = minetest.get_meta(pos)
local currentpressure = meta:get_float(label_pressure)
meta:set_int(label_haspressure, 1)
local connections = { meta }
local totalv = currentpressure
local totalc = 1
-- then handle neighbours, but if not a pressure node don't consider them at all
for _, npos in ipairs(make_coords_offsets(pos, false)) do
local neighbour = minetest.get_meta(npos)
local haspressure = (neighbour:get_int(label_haspressure) ~= 0)
if haspressure then
local n = neighbour:get_float(label_pressure)
table.insert(connections, neighbour)
totalv = totalv + n
totalc = totalc + 1
end
end
local average = totalv / totalc
for _, targetmeta in ipairs(connections) do
targetmeta:set_float(label_pressure, average)
end
end