-- Forcefield mod by ShadowNinja
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-- Modified by kpoppel
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--
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-- Forcefields are powerful barriers but they consume huge amounts of power.
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-- Forcefield Generator is a 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 forcefield_power_drain = 10
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local forcefield_step_interval = 1
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local S = technic.getter
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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', 'technic:deployer_off', 'default:mese' },
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{'technic:deployer_off', 'technic:motor', 'technic:deployer_off'},
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{'default:mese', 'technic:deployer_off', 'default:mese' },
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}
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})
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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, range, active)
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local vm = VoxelManip()
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local p1 = {x = pos.x-range, y = pos.y-range, z = pos.z-range}
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local p2 = {x = pos.x+range, y = pos.y+range, z = pos.z+range}
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local MinEdge, MaxEdge = vm:read_from_map(p1, p2)
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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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if x*x+y*y+z*z <= range * range + range and
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x*x+y*y+z*z >= (range-1) * (range-1) + (range-1) then
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if active and data[vi] == c_air then
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data[vi] = c_field
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elseif not active and data[vi] == 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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vm:update_map()
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end
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local get_forcefield_formspec = function(range)
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return "size[3,1.5]"..
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"field[1,0.5;2,1;range;"..S("Range")..";"..range.."]"..
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"button[0,1;3,1;toggle;"..S("Enable/Disable").."]"
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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 = tonumber(fields.range) or 0
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if fields.toggle then
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if meta:get_int("enabled") == 1 then
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meta:set_int("enabled", 0)
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else
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meta:set_int("enabled", 1)
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end
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end
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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 meta:get_int("range") ~= range then
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update_forcefield(pos, meta:get_int("range"), false)
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meta:set_int("range", range)
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meta:set_string("formspec", get_forcefield_formspec(range))
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end
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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("enabled", 0)
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end,
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action_off = function(pos, node)
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minetest.get_meta(pos):set_int("enabled", 1)
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end
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}
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}
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minetest.register_node("technic:forcefield_emitter_off", {
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description = S("Forcefield Emitter"),
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tiles = {"technic_forcefield_emitter_off.png"},
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groups = {cracky = 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_string("formspec", get_forcefield_formspec(10))
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meta:set_string("infotext", S("Forcefield Emitter"))
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end,
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mesecons = mesecons
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})
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minetest.register_node("technic:forcefield_emitter_on", {
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description = S("Forcefield Emitter"),
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tiles = {"technic_forcefield_emitter_on.png"},
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groups = {cracky = 1, 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_construct = function(pos)
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local meta = minetest.get_meta(pos)
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local range = meta:get_int("range")
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meta:set_string("formspec", get_forcefield_formspec(range))
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end,
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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:get_int("range"), false)
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end,
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mesecons = mesecons
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})
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minetest.register_node("technic:forcefield", {
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description = S("Forcefield"),
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sunlight_propagates = true,
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drawtype = "glasslike",
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groups = {not_in_creative_inventory=1, unbreakable=1},
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paramtype = "light",
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light_source = 15,
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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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})
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minetest.register_abm({
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nodenames = {"technic:forcefield_emitter_on", "technic:forcefield_emitter_off"},
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interval = 1,
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chance = 1,
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action = function(pos, node, active_object_count, active_object_count_wider)
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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 eu_demand = meta:get_int("HV_EU_demand")
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local enabled = meta:get_int("enabled")
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local machine_name = S("Forcefield Emitter")
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-- Power off automatically if no longer connected to a switching station
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technic.switching_station_timeout_count(pos, "HV")
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local power_requirement = math.floor(
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4 * math.pi * math.pow(meta:get_int("range"), 2)
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) * forcefield_power_drain
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if meta:get_int("enabled") == 0 then
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if node.name == "technic:forcefield_emitter_on" then
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meta:set_int("HV_EU_demand", 0)
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update_forcefield(pos, meta:get_int("range"), false)
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hacky_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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return
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end
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elseif 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:get_int("range"), false)
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hacky_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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if node.name == "technic:forcefield_emitter_off" then
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hacky_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:get_int("range"), true)
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end
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meta:set_int("HV_EU_demand", power_requirement)
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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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-- TODO: Register a stopper for frames
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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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