--- Forcefield generator.
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-- @author ShadowNinja
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--
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-- Forcefields are powerful barriers but they consume huge amounts of power.
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-- The forcefield Generator is an HV machine.
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-- How expensive is the generator?
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-- Leaves room for upgrades lowering the power drain?
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local digilines_path = minetest.get_modpath("digilines")
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local forcefield_power_drain = 10
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local S = technic.getter
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local cable_entry = "^technic_cable_connection_overlay.png"
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minetest.register_craft({
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output = "technic:forcefield_emitter_off",
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recipe = {
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{"default:mese", "basic_materials:motor", "default:mese" },
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{"technic:deployer_off", "technic:machine_casing", "technic:deployer_off"},
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{"default:mese", "technic:hv_cable", "default:mese" },
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}
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})
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local replaceable_cids = {}
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minetest.after(0, function()
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for name, ndef in pairs(minetest.registered_nodes) do
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if ndef.buildable_to == true and name ~= "ignore" then
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replaceable_cids[minetest.get_content_id(name)] = true
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end
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end
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end)
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-- Idea: Let forcefields have different colors by upgrade slot.
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-- Idea: Let forcefields add up by detecting if one hits another.
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-- ___ __
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-- / \/ \
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-- | |
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-- \___/\___/
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local function update_forcefield(pos, meta, active, first)
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local shape = meta:get_int("shape")
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local range = meta:get_int("range")
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local vm = VoxelManip()
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local MinEdge, MaxEdge = vm:read_from_map(vector.subtract(pos, range),
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vector.add(pos, range))
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local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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local data = vm:get_data()
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local c_air = minetest.get_content_id("air")
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local c_field = minetest.get_content_id("technic:forcefield")
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for z = -range, range do
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for y = -range, range do
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local vi = area:index(pos.x + (-range), pos.y + y, pos.z + z)
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for x = -range, range do
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local relevant
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if shape == 0 then
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local squared = x * x + y * y + z * z
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relevant =
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squared <= range * range + range and
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squared >= (range - 1) * (range - 1) + (range - 1)
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else
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relevant =
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x == -range or x == range or
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y == -range or y == range or
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z == -range or z == range
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end
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if relevant then
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local cid = data[vi]
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if active and replaceable_cids[cid] then
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data[vi] = c_field
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elseif not active and cid == c_field then
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data[vi] = c_air
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end
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end
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vi = vi + 1
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end
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end
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end
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vm:set_data(data)
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vm:update_liquids()
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vm:write_to_map()
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-- update_map is very slow, but if we don't call it we'll
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-- get phantom blocks on the client.
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if not active or first then
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vm:update_map()
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end
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end
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local function set_forcefield_formspec(meta)
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local formspec
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if digilines_path then
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formspec = "size[5,3.25]"..
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"field[0.3,3;5,1;channel;Digiline Channel;"..meta:get_string("channel").."]"
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else
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formspec = "size[5,2.25]"
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end
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formspec = formspec..
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"field[0.3,0.5;2,1;range;"..S("Range")..";"..meta:get_int("range").."]"
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-- The names for these toggle buttons are explicit about which
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-- state they'll switch to, so that multiple presses (arising
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-- from the ambiguity between lag and a missed press) only make
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-- the single change that the user expects.
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if meta:get_int("shape") == 0 then
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formspec = formspec.."button[3,0.2;2,1;shape1;"..S("Sphere").."]"
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else
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formspec = formspec.."button[3,0.2;2,1;shape0;"..S("Cube").."]"
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end
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if meta:get_int("mesecon_mode") == 0 then
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formspec = formspec.."button[0,1;5,1;mesecon_mode_1;"..S("Ignoring Mesecon Signal").."]"
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else
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formspec = formspec.."button[0,1;5,1;mesecon_mode_0;"..S("Controlled by Mesecon Signal").."]"
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end
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if meta:get_int("enabled") == 0 then
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formspec = formspec.."button[0,1.75;5,1;enable;"..S("%s Disabled"):format(S("%s Forcefield Emitter"):format("HV")).."]"
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else
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formspec = formspec.."button[0,1.75;5,1;disable;"..S("%s Enabled"):format(S("%s Forcefield Emitter"):format("HV")).."]"
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end
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meta:set_string("formspec", formspec)
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end
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local forcefield_receive_fields = function(pos, formname, fields, sender)
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local meta = minetest.get_meta(pos)
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local range = nil
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if fields.range then
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range = tonumber(fields.range) or 0
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-- Smallest field is 5. Anything less is asking for trouble.
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-- Largest is 20. It is a matter of pratical node handling.
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-- At the maximim range updating the forcefield takes about 0.2s
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range = math.max(range, 5)
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range = math.min(range, 20)
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if range == meta:get_int("range") then range = nil end
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end
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if fields.shape0 or fields.shape1 or range then
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update_forcefield(pos, meta, false)
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end
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if range then meta:set_int("range", range) end
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if fields.channel then meta:set_string("channel", fields.channel) end
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if fields.shape0 then meta:set_int("shape", 0) end
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if fields.shape1 then meta:set_int("shape", 1) end
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if fields.enable then meta:set_int("enabled", 1) end
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if fields.disable then meta:set_int("enabled", 0) end
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if fields.mesecon_mode_0 then meta:set_int("mesecon_mode", 0) end
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if fields.mesecon_mode_1 then meta:set_int("mesecon_mode", 1) end
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set_forcefield_formspec(meta)
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end
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local mesecons = {
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effector = {
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action_on = function(pos, node)
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minetest.get_meta(pos):set_int("mesecon_effect", 1)
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end,
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action_off = function(pos, node)
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minetest.get_meta(pos):set_int("mesecon_effect", 0)
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end
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}
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}
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local digiline_def = {
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receptor = {action = function() end},
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effector = {
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action = function(pos, node, channel, msg)
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local meta = minetest.get_meta(pos)
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if channel ~= meta:get_string("channel") then
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return
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end
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local msgt = type(msg)
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if msgt == "string" then
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local smsg = msg:lower()
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msg = {}
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if smsg == "get" then
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msg.command = "get"
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elseif smsg == "off" then
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msg.command = "off"
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elseif smsg == "on" then
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msg.command = "on"
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elseif smsg == "toggle" then
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msg.command = "toggle"
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elseif smsg:sub(1, 5) == "range" then
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msg.command = "range"
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msg.value = tonumber(smsg:sub(7))
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elseif smsg:sub(1, 5) == "shape" then
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msg.command = "shape"
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msg.value = smsg:sub(7):lower()
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msg.value = tonumber(msg.value) or msg.value
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end
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elseif msgt ~= "table" then
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return
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end
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if msg.command == "get" then
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digilines.receptor_send(pos, digilines.rules.default, channel, {
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enabled = meta:get_int("enabled"),
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range = meta:get_int("range"),
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shape = meta:get_int("shape")
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})
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return
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elseif msg.command == "off" then
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meta:set_int("enabled", 0)
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elseif msg.command == "on" then
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meta:set_int("enabled", 1)
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elseif msg.command == "toggle" then
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local onn = meta:get_int("enabled")
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onn = 1-onn -- Mirror onn with pivot 0.5, so switch between 1 and 0.
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meta:set_int("enabled", onn)
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elseif msg.command == "range" then
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if type(msg.value) ~= "number" then
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return
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end
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msg.value = math.max(msg.value, 5)
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msg.value = math.min(msg.value, 20)
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update_forcefield(pos, meta, false)
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meta:set_int("range", msg.value)
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elseif msg.command == "shape" then
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local valuet = type(msg.value)
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if valuet == "string" then
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if msg.value == "sphere" then
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msg.value = 0
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elseif msg.value == "cube" then
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msg.value = 1
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end
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elseif valuet ~= "number" then
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return
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end
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if not msg.value then
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return
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end
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update_forcefield(pos, meta, false)
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meta:set_int("shape", msg.value)
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else
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return
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end
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set_forcefield_formspec(meta)
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end
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},
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}
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local function run(pos, node)
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local meta = minetest.get_meta(pos)
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local eu_input = meta:get_int("HV_EU_input")
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local enabled = meta:get_int("enabled") ~= 0 and
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(meta:get_int("mesecon_mode") == 0 or meta:get_int("mesecon_effect") ~= 0)
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local machine_name = S("%s Forcefield Emitter"):format("HV")
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local range = meta:get_int("range")
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local power_requirement
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if meta:get_int("shape") == 0 then
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power_requirement = math.floor(4 * math.pi * range * range)
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else
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power_requirement = 24 * range * range
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end
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power_requirement = power_requirement * forcefield_power_drain
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if not enabled then
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if node.name == "technic:forcefield_emitter_on" then
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update_forcefield(pos, meta, false)
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technic.swap_node(pos, "technic:forcefield_emitter_off")
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meta:set_string("infotext", S("%s Disabled"):format(machine_name))
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end
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meta:set_int("HV_EU_demand", 0)
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return
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end
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meta:set_int("HV_EU_demand", power_requirement)
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if eu_input < power_requirement then
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meta:set_string("infotext", S("%s Unpowered"):format(machine_name))
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if node.name == "technic:forcefield_emitter_on" then
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update_forcefield(pos, meta, false)
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technic.swap_node(pos, "technic:forcefield_emitter_off")
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end
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elseif eu_input >= power_requirement then
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local first = false
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if node.name == "technic:forcefield_emitter_off" then
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first = true
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technic.swap_node(pos, "technic:forcefield_emitter_on")
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meta:set_string("infotext", S("%s Active"):format(machine_name))
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end
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update_forcefield(pos, meta, true, first)
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end
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end
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minetest.register_node("technic:forcefield_emitter_off", {
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description = S("%s Forcefield Emitter"):format("HV"),
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tiles = {
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"technic_forcefield_emitter_off.png",
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"technic_machine_bottom.png"..cable_entry,
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"technic_forcefield_emitter_off.png",
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"technic_forcefield_emitter_off.png",
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"technic_forcefield_emitter_off.png",
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"technic_forcefield_emitter_off.png"
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},
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groups = {cracky = 1, technic_machine = 1, technic_hv = 1},
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on_receive_fields = forcefield_receive_fields,
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on_construct = function(pos)
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local meta = minetest.get_meta(pos)
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meta:set_int("HV_EU_input", 0)
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meta:set_int("HV_EU_demand", 0)
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meta:set_int("range", 10)
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meta:set_int("enabled", 0)
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meta:set_int("mesecon_mode", 0)
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meta:set_int("mesecon_effect", 0)
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if digilines_path then
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meta:set_string("channel", "forcefield"..minetest.pos_to_string(pos))
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end
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meta:set_string("infotext", S("%s Forcefield Emitter"):format("HV"))
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set_forcefield_formspec(meta)
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end,
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mesecons = mesecons,
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digiline = digiline_def,
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technic_run = run,
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})
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minetest.register_node("technic:forcefield_emitter_on", {
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description = S("%s Forcefield Emitter"):format("HV"),
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tiles = {
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"technic_forcefield_emitter_on.png",
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"technic_machine_bottom.png"..cable_entry,
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"technic_forcefield_emitter_on.png",
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"technic_forcefield_emitter_on.png",
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"technic_forcefield_emitter_on.png",
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"technic_forcefield_emitter_on.png"
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},
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groups = {cracky = 1, technic_machine = 1, technic_hv = 1,
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not_in_creative_inventory=1},
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drop = "technic:forcefield_emitter_off",
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on_receive_fields = forcefield_receive_fields,
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on_destruct = function(pos)
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local meta = minetest.get_meta(pos)
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update_forcefield(pos, meta, false)
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end,
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mesecons = mesecons,
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digiline = digiline_def,
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technic_run = run,
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technic_on_disable = function (pos, node)
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local meta = minetest.get_meta(pos)
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update_forcefield(pos, meta, false)
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technic.swap_node(pos, "technic:forcefield_emitter_off")
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end,
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on_blast = function(pos, intensity)
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minetest.dig_node(pos)
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return {"technic:forcefield_emitter_off"}
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end,
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})
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minetest.register_node("technic:forcefield", {
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description = S("%s Forcefield"):format("HV"),
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sunlight_propagates = true,
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drawtype = "glasslike",
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groups = {not_in_creative_inventory=1},
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paramtype = "light",
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light_source = default.LIGHT_MAX,
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diggable = false,
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drop = '',
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tiles = {{
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name = "technic_forcefield_animated.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 1.0,
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},
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}},
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on_blast = function(pos, intensity)
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end,
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})
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if minetest.get_modpath("mesecons_mvps") then
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mesecon.register_mvps_stopper("technic:forcefield")
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end
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technic.register_machine("HV", "technic:forcefield_emitter_on", technic.receiver)
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technic.register_machine("HV", "technic:forcefield_emitter_off", technic.receiver)
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