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new flow logic: abms.lua: wrap up pressure value accesses behind accessor object

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This commit is contained in:
thetaepsilon-gamedev 2017-10-07 17:14:50 +01:00
parent 34cfee8a2f
commit 608a9a6980
1 changed files with 20 additions and 7 deletions
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27
new_flow_logic/abms.lua
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@ -53,6 +53,18 @@ flowlogic.check_for_liquids_v2 = check_for_liquids_v2
local label_pressure = "pipeworks.water_pressure"
local get_pressure_access = function(pos)
local metaref = minetest.get_meta(pos)
return {
get = function()
return metaref:get_float(label_pressure)
end,
set = function(v)
metaref:set_float(label_pressure, v)
end
}
end
flowlogic.balance_pressure = function(pos, node)
-- debuglog("balance_pressure() "..node.name.." at "..pos.x.." "..pos.y.." "..pos.z)
-- check the pressure of all nearby nodes, and average it out.
@ -60,22 +72,23 @@ flowlogic.balance_pressure = function(pos, node)
-- 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)
local connections = { meta }
local pressure = get_pressure_access(pos)
local currentpressure = pressure.get()
-- pressure handles to average over
local connections = { pressure }
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 nodename = minetest.get_node(npos).name
local neighbour = minetest.get_meta(npos)
-- for now, just check if it's in the simple table.
-- TODO: the "can flow from" logic in flowable_node_registry.lua
local haspressure = (pipeworks.flowables.list.simple[nodename])
if haspressure then
local neighbour = get_pressure_access(npos)
--pipeworks.logger("balance_pressure @ "..formatvec(pos).." "..nodename.." "..formatvec(npos).." added to neighbour set")
local n = neighbour:get_float(label_pressure)
local n = neighbour.get()
table.insert(connections, neighbour)
totalv = totalv + n
totalc = totalc + 1
@ -83,8 +96,8 @@ flowlogic.balance_pressure = function(pos, node)
end
local average = totalv / totalc
for _, targetmeta in ipairs(connections) do
targetmeta:set_float(label_pressure, average)
for _, target in ipairs(connections) do
target.set(average)
end
end