369 lines
12 KiB
Lua
369 lines
12 KiB
Lua
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-- reimplementation of new_flow_logic branch: processing functions
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-- written 2017 by thetaepsilon
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local flowlogic = {}
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flowlogic.helpers = {}
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pipeworks.flowlogic = flowlogic
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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 debuglog = function(msg) print("## "..msg) end
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local formatvec = function(vec) local sep="," return "("..tostring(vec.x)..sep..tostring(vec.y)..sep..tostring(vec.z)..")" end
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-- new version of liquid check
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-- accepts a limit parameter to only delete water blocks that the receptacle can accept,
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-- and returns it so that the receptacle can update it's pressure values.
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local check_for_liquids_v2 = function(pos, limit)
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local coords = make_coords_offsets(pos, false)
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local total = 0
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for index, tpos in ipairs(coords) do
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if total >= limit then break end
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local name = minetest.get_node(tpos).name
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if name == "default:water_source" then
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minetest.remove_node(tpos)
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total = total + 1
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end
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end
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--pipeworks.logger("check_for_liquids_v2@"..formatvec(pos).." total "..total)
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return total
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end
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flowlogic.check_for_liquids_v2 = check_for_liquids_v2
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local label_pressure = "pipeworks.water_pressure"
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local get_pressure_access = function(pos)
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local metaref = minetest.get_meta(pos)
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return {
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get = function()
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return metaref:get_float(label_pressure)
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end,
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set = function(v)
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metaref:set_float(label_pressure, v)
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end
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}
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end
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-- logging is unreliable when something is crashing...
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local nilexplode = function(caller, label, value)
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if value == nil then
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error(caller..": "..label.." was nil")
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end
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end
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local finitemode = pipeworks.toggles.finite_water
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flowlogic.run = function(pos, node)
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local nodename = node.name
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-- get the current pressure value.
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local nodepressure = get_pressure_access(pos)
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local currentpressure = nodepressure.get()
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local oldpressure = currentpressure
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-- if node is an input: run intake phase
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local inputdef = pipeworks.flowables.inputs.list[nodename]
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if inputdef then
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currentpressure = flowlogic.run_input(pos, node, currentpressure, inputdef)
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--debuglog("post-intake currentpressure is "..currentpressure)
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--nilexplode("run()", "currentpressure", currentpressure)
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end
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-- balance pressure with neighbours
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currentpressure = flowlogic.balance_pressure(pos, node, currentpressure)
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-- if node is an output: run output phase
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local outputdef = pipeworks.flowables.outputs.list[nodename]
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if outputdef then
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currentpressure = flowlogic.run_output(
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pos,
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node,
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currentpressure,
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oldpressure,
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outputdef,
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finitemode)
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end
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-- if node has pressure transitions: determine new node
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if pipeworks.flowables.transitions.list[nodename] then
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local newnode = flowlogic.run_transition(node, currentpressure)
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--pipeworks.logger("flowlogic.run()@"..formatvec(pos).." transition, new node name = "..dump(newnode).." pressure "..tostring(currentpressure))
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minetest.swap_node(pos, newnode)
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flowlogic.run_transition_post(pos, newnode)
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end
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-- set the new pressure
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nodepressure.set(currentpressure)
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end
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local simple_neighbour_offsets = {
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{x=0, y=-1,z= 0},
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{x=0, y= 1,z= 0},
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{x=-1,y= 0,z= 0},
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{x= 1,y= 0,z= 0},
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{x= 0,y= 0,z=-1},
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{x= 0,y= 0,z= 1},
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}
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local get_neighbour_positions = function(pos, node)
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-- local dname = "get_neighbour_positions@"..formatvec(pos).." "
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-- get list of node neighbours.
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-- if this node is directional and only flows on certain sides,
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-- invoke the callback to retrieve the set.
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-- for simple flowables this is just an auto-gen'd list of all six possible neighbours.
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local candidates = {}
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if pipeworks.flowables.list.simple[node.name] then
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candidates = simple_neighbour_offsets
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else
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-- directional flowables: call the callback to get the list
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local directional = pipeworks.flowables.list.directional[node.name]
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if directional then
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--pipeworks.logger(dname.."invoking neighbourfn")
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local offsets = directional.neighbourfn(node)
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candidates = offsets
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end
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end
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-- then, check each possible neighbour to see if they can be reached from this node.
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local connections = {}
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for index, offset in ipairs(candidates) do
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local npos = vector.add(pos, offset)
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local neighbour = minetest.get_node(npos)
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local nodename = neighbour.name
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local is_simple = (pipeworks.flowables.list.simple[nodename])
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if is_simple then
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local n = get_pressure_access(npos)
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table.insert(connections, n)
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else
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-- if target node is also directional, check if it agrees it can flow in that direction
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local directional = pipeworks.flowables.list.directional[nodename]
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if directional then
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--pipeworks.logger(dname.."directionality test for offset "..formatvec(offset))
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local towards_origin = vector.multiply(offset, -1)
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--pipeworks.logger(dname.."vector passed to directionfn: "..formatvec(towards_origin))
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local result = directional.directionfn(neighbour, towards_origin)
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--pipeworks.logger(dname.."result: "..tostring(result))
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if result then
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local n = get_pressure_access(npos)
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table.insert(connections, n)
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end
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end
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end
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end
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return connections
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end
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flowlogic.balance_pressure = function(pos, node, currentpressure)
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-- local dname = "flowlogic.balance_pressure()@"..formatvec(pos).." "
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-- check the pressure of all nearby flowable nodes, and average it out.
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-- pressure handles to average over
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local connections = {}
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-- unconditionally include self in nodes to average over.
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-- result of averaging will be returned as new pressure for main flow logic callback
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local totalv = currentpressure
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local totalc = 1
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local connections = get_neighbour_positions(pos, node)
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-- for each neighbour, add neighbour's pressure to the total to balance out
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for _, neighbour in ipairs(connections) do
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local n = neighbour.get()
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totalv = totalv + n
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totalc = totalc + 1
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end
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local average = totalv / totalc
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for _, target in ipairs(connections) do
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target.set(average)
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end
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return average
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end
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flowlogic.run_input = function(pos, node, currentpressure, inputdef)
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-- intakefn allows a given input node to define it's own intake logic.
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-- this function will calculate the maximum amount of water that can be taken in;
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-- the intakefn will be given this and is expected to return the actual absorption amount.
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local maxpressure = inputdef.maxpressure
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local intake_limit = maxpressure - currentpressure
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if intake_limit <= 0 then return currentpressure end
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local actual_intake = inputdef.intakefn(pos, intake_limit)
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--pipeworks.logger("run_input@"..formatvec(pos).." oldpressure "..currentpressure.." intake_limit "..intake_limit.." actual_intake "..actual_intake)
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if actual_intake <= 0 then return currentpressure end
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local newpressure = actual_intake + currentpressure
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--debuglog("run_input() end, oldpressure "..currentpressure.." intake_limit "..intake_limit.." actual_intake "..actual_intake.." newpressure "..newpressure)
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return newpressure
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end
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-- flowlogic output helper implementation:
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-- outputs water by trying to place water nodes nearby in the world.
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-- neighbours is a list of node offsets to try placing water in.
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-- this is a constructor function, returning another function which satisfies the output helper requirements.
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-- note that this does *not* take rotation into account.
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flowlogic.helpers.make_neighbour_output_fixed = function(neighbours)
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return function(pos, node, currentpressure, finitemode)
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local taken = 0
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for _, offset in pairs(neighbours) do
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local npos = vector.add(pos, offset)
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local name = minetest.get_node(npos).name
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if currentpressure < 1 then break end
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-- take pressure anyway in non-finite mode, even if node is water source already.
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-- in non-finite mode, pressure has to be sustained to keep the sources there.
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-- so in non-finite mode, placing water is dependent on the target node;
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-- draining pressure is not.
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local canplace = (name == "air") or (name == "default:water_flowing")
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if canplace then
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minetest.swap_node(npos, {name="default:water_source"})
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end
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if (not finitemode) or canplace then
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taken = taken + 1
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currentpressure = currentpressure - 1
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end
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end
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return taken
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end
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end
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-- complementary function to the above when using non-finite mode:
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-- removes water sources from neighbor positions when the output is "off" due to lack of pressure.
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flowlogic.helpers.make_neighbour_cleanup_fixed = function(neighbours)
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return function(pos, node, currentpressure)
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--pipeworks.logger("neighbour_cleanup_fixed@"..formatvec(pos))
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for _, offset in pairs(neighbours) do
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local npos = vector.add(pos, offset)
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local name = minetest.get_node(npos).name
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if (name == "default:water_source") then
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--pipeworks.logger("neighbour_cleanup_fixed removing "..formatvec(npos))
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minetest.remove_node(npos)
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end
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end
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end
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end
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flowlogic.run_output = function(pos, node, currentpressure, oldpressure, outputdef, finitemode)
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-- processing step for water output devices.
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-- takes care of checking a minimum pressure value and updating the resulting pressure level
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-- the outputfn is provided the current pressure and returns the pressure "taken".
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-- as an example, using this with the above spigot function,
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-- the spigot function tries to output a water source if it will fit in the world.
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--pipeworks.logger("flowlogic.run_output() pos "..formatvec(pos).." old -> currentpressure "..tostring(oldpressure).." "..tostring(currentpressure).." finitemode "..tostring(finitemode))
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local upper = outputdef.upper
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local lower = outputdef.lower
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local result = currentpressure
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local threshold = nil
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if finitemode then threshold = lower else threshold = upper end
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if currentpressure > threshold then
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local takenpressure = outputdef.outputfn(pos, node, currentpressure, finitemode)
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local newpressure = currentpressure - takenpressure
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if newpressure < 0 then newpressure = 0 end
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result = newpressure
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end
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if (not finitemode) and (currentpressure < lower) and (oldpressure < lower) then
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--pipeworks.logger("flowlogic.run_output() invoking cleanup currentpressure="..tostring(currentpressure))
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outputdef.cleanupfn(pos, node, currentpressure)
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end
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return result
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end
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-- determine which node to switch to based on current pressure
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flowlogic.run_transition = function(node, currentpressure)
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local simplesetdef = pipeworks.flowables.transitions.simple[node.name]
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local result = node
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local found = false
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-- simple transition sets: assumes all nodes in the set share param values.
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if simplesetdef then
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-- assumes that the set has been checked to contain at least one element...
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local nodename_prev = simplesetdef[1].nodename
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local result_nodename = node.name
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for index, element in ipairs(simplesetdef) do
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-- find the highest element that is below the current pressure.
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local threshold = element.threshold
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if threshold > currentpressure then
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result_nodename = nodename_prev
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found = true
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break
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end
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nodename_prev = element.nodename
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end
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-- use last element if no threshold is greater than current pressure
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if not found then
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result_nodename = nodename_prev
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found = true
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end
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-- preserve param1/param2 values
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result = { name=result_nodename, param1=node.param1, param2=node.param2 }
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end
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if not found then
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pipeworks.logger("flowlogic.run_transition() BUG no transition definitions found! nodename="..nodename.." currentpressure="..tostring(currentpressure))
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end
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return result
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end
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-- post-update hook for run_transition
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-- among other things, updates mesecons if present.
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-- node here means the new node, returned from run_transition() above
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flowlogic.run_transition_post = function(pos, node)
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local mesecons_def = minetest.registered_nodes[node.name].mesecons
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local mesecons_rules = pipeworks.flowables.transitions.mesecons[node.name]
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if minetest.global_exists("mesecon") and (mesecons_def ~= nil) and mesecons_rules then
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if type(mesecons_def) ~= "table" then
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pipeworks.logger("flowlogic.run_transition_post() BUG mesecons def for "..node.name.."not a table: got "..tostring(mesecons_def))
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else
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local receptor = mesecons_def.receptor
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if receptor then
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local state = receptor.state
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if state == mesecon.state.on then
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mesecon.receptor_on(pos, mesecons_rules)
|
||
|
|
elseif state == mesecon.state.off then
|
||
|
|
mesecon.receptor_off(pos, mesecons_rules)
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|