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VoxeLibre/mods/ITEMS/REDSTONE/mcl_observers/init.lua

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local S = minetest.get_translator(minetest.get_current_modname())
mcl_observers = {}
local string = string
local get_node = minetest.get_node
-- Warning! TODO: Remove this message.
-- 'realtime' is experimental feature! It can slow down the everything!
-- Please set it to false and restart the game if something's wrong:
local realtime = true
--local realtime = false
local rules_flat = {
{ x = 0, y = 0, z = -1, spread = true },
}
local function get_rules_flat(node)
local rules = rules_flat
for i=1, node.param2 do
rules = mesecon.rotate_rules_left(rules)
end
return rules
end
local rules_down = {{ x = 0, y = 1, z = 0, spread = true }}
local rules_up = {{ x = 0, y = -1, z = 0, spread = true }}
function mcl_observers.observer_activate(pos)
minetest.after(mcl_vars.redstone_tick, function(pos)
local node = get_node(pos)
if not node then
return
end
local nn = node.name
if nn == "mcl_observers:observer_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_on", param2 = node.param2})
mesecon.receptor_on(pos, get_rules_flat(node))
elseif nn == "mcl_observers:observer_down_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_down_on"})
mesecon.receptor_on(pos, rules_down)
elseif nn == "mcl_observers:observer_up_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_up_on"})
mesecon.receptor_on(pos, rules_up)
end
end, {x=pos.x, y=pos.y, z=pos.z})
end
-- Scan the node in front of the observer
-- and update the observer state if needed.
-- TODO: Also scan metadata changes.
-- TODO: Ignore some node changes.
local function observer_scan(pos, initialize)
local node = get_node(pos)
local front
if node.name == "mcl_observers:observer_up_off" or node.name == "mcl_observers:observer_up_on" then
front = vector.add(pos, {x=0, y=1, z=0})
elseif node.name == "mcl_observers:observer_down_off" or node.name == "mcl_observers:observer_down_on" then
front = vector.add(pos, {x=0, y=-1, z=0})
else
front = vector.add(pos, minetest.facedir_to_dir(node.param2))
end
local frontnode = get_node(front)
local meta = minetest.get_meta(pos)
local oldnode = meta:get_string("node_name")
local oldparam2 = meta:get_string("node_param2")
local meta_needs_updating = false
if oldnode ~= "" and not initialize then
if not (frontnode.name == oldnode and tostring(frontnode.param2) == oldparam2) then
-- Node state changed! Activate observer
if node.name == "mcl_observers:observer_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_on", param2 = node.param2})
mesecon.receptor_on(pos, get_rules_flat(node))
elseif node.name == "mcl_observers:observer_down_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_down_on"})
mesecon.receptor_on(pos, rules_down)
elseif node.name == "mcl_observers:observer_up_off" then
minetest.set_node(pos, {name = "mcl_observers:observer_up_on"})
mesecon.receptor_on(pos, rules_up)
end
meta_needs_updating = true
end
else
meta_needs_updating = true
end
if meta_needs_updating then
meta:set_string("node_name", frontnode.name)
meta:set_string("node_param2", tostring(frontnode.param2))
end
return frontnode
end
-- Vertical orientation (CURRENTLY DISABLED)
local function observer_orientate(pos, placer)
-- Not placed by player
if not placer then return end
-- Placer pitch in degrees
local pitch = placer:get_look_vertical() * (180 / math.pi)
--local node = get_node(pos)
if pitch > 55 then -- player looking upwards
-- Observer looking downwards
minetest.set_node(pos, {name="mcl_observers:observer_down_off"})
elseif pitch < -55 then -- player looking downwards
-- Observer looking upwards
minetest.set_node(pos, {name="mcl_observers:observer_up_off"})
end
end
mesecon.register_node("mcl_observers:observer", {
is_ground_content = false,
sounds = mcl_sounds.node_sound_stone_defaults(),
paramtype2 = "facedir",
on_rotate = false,
_mcl_blast_resistance = 3.5,
_mcl_hardness = 3.5,
}, {
description = S("Observer"),
_tt_help = S("Emits redstone pulse when block in front changes"),
_doc_items_longdesc = S("An observer is a redstone component which observes the block in front of it and sends a very short redstone pulse whenever this block changes."),
_doc_items_usagehelp = S("Place the observer directly in front of the block you want to observe with the “face” looking at the block. The arrow points to the side of the output, which is at the opposite side of the “face”. You can place your redstone dust or any other component here."),
groups = {pickaxey=1, material_stone=1, not_opaque=1, },
tiles = {
"mcl_observers_observer_top.png^[transformR180", "default_furnace_bottom.png",
"mcl_observers_observer_side.png", "mcl_observers_observer_side.png",
"mcl_observers_observer_front.png", "mcl_observers_observer_back.png",
},
mesecons = {
receptor = {
state = mesecon.state.off,
rules = get_rules_flat,
},
},
on_construct = function(pos)
if not realtime then
observer_scan(pos, true)
end
end,
after_place_node = observer_orientate,
}, {
_doc_items_create_entry = false,
groups = {pickaxey=1, material_stone=1, not_opaque=1, not_in_creative_inventory=1 },
tiles = {
"mcl_observers_observer_top.png^[transformR180", "default_furnace_bottom.png",
"mcl_observers_observer_side.png", "mcl_observers_observer_side.png",
"mcl_observers_observer_front.png", "mcl_observers_observer_back_lit.png",
},
mesecons = {
receptor = {
state = mesecon.state.on,
rules = get_rules_flat,
}
},
-- VERY quickly disable observer after construction
on_construct = function(pos)
local timer = minetest.get_node_timer(pos)
timer:start(mcl_vars.redstone_tick)
end,
on_timer = function(pos, elapsed)
local node = get_node(pos)
minetest.set_node(pos, {name = "mcl_observers:observer_off", param2 = node.param2})
mesecon.receptor_off(pos, get_rules_flat(node))
end,
}
)
mesecon.register_node("mcl_observers:observer_down", {
is_ground_content = false,
sounds = mcl_sounds.node_sound_stone_defaults(),
groups = {pickaxey=1, material_stone=1, not_opaque=1, not_in_creative_inventory=1 },
on_rotate = false,
_mcl_blast_resistance = 3.5,
_mcl_hardness = 3.5,
drop = "mcl_observers:observer_off",
}, {
tiles = {
"mcl_observers_observer_back.png", "mcl_observers_observer_front.png",
"mcl_observers_observer_side.png^[transformR90", "mcl_observers_observer_side.png^[transformR90",
"mcl_observers_observer_top.png", "mcl_observers_observer_top.png",
},
mesecons = {
receptor = {
state = mesecon.state.off,
rules = rules_down,
},
},
on_construct = function(pos)
if not realtime then
observer_scan(pos, true)
end
end,
}, {
_doc_items_create_entry = false,
tiles = {
"mcl_observers_observer_back_lit.png", "mcl_observers_observer_front.png",
"mcl_observers_observer_side.png^[transformR90", "mcl_observers_observer_side.png^[transformR90",
"mcl_observers_observer_top.png", "mcl_observers_observer_top.png",
},
mesecons = {
receptor = {
state = mesecon.state.on,
rules = rules_down,
},
},
-- VERY quickly disable observer after construction
on_construct = function(pos)
local timer = minetest.get_node_timer(pos)
timer:start(mcl_vars.redstone_tick)
end,
on_timer = function(pos, elapsed)
local node = get_node(pos)
minetest.set_node(pos, {name = "mcl_observers:observer_down_off", param2 = node.param2})
mesecon.receptor_off(pos, rules_down)
end,
}
)
mesecon.register_node("mcl_observers:observer_up", {
is_ground_content = false,
sounds = mcl_sounds.node_sound_stone_defaults(),
groups = {pickaxey=1, material_stone=1, not_opaque=1, not_in_creative_inventory=1 },
on_rotate = false,
_mcl_blast_resistance = 3.5,
_mcl_hardness = 3.5,
drop = "mcl_observers:observer_off",
}, {
tiles = {
"mcl_observers_observer_front.png", "mcl_observers_observer_back.png",
"mcl_observers_observer_side.png^[transformR270", "mcl_observers_observer_side.png^[transformR270",
"mcl_observers_observer_top.png^[transformR180", "mcl_observers_observer_top.png^[transformR180",
},
mesecons = {
receptor = {
state = mesecon.state.off,
rules = rules_up,
},
},
on_construct = function(pos)
if not realtime then
observer_scan(pos, true)
end
end,
}, {
_doc_items_create_entry = false,
tiles = {
"mcl_observers_observer_front.png", "mcl_observers_observer_back_lit.png",
"mcl_observers_observer_side.png^[transformR270", "mcl_observers_observer_side.png^[transformR270",
"mcl_observers_observer_top.png^[transformR180", "mcl_observers_observer_top.png^[transformR180",
},
mesecons = {
receptor = {
state = mesecon.state.on,
rules = rules_up,
},
},
-- VERY quickly disable observer after construction
on_construct = function(pos)
local timer = minetest.get_node_timer(pos)
timer:start(mcl_vars.redstone_tick)
end,
on_timer = function(pos, elapsed)
minetest.set_node(pos, {name = "mcl_observers:observer_up_off"})
mesecon.receptor_off(pos, rules_up)
end,
}
)
minetest.register_craft({
output = "mcl_observers:observer_off",
recipe = {
{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
{ "mcl_nether:quartz", "mesecons:redstone", "mesecons:redstone" },
{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
},
})
minetest.register_craft({
output = "mcl_observers:observer_off",
recipe = {
{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
{ "mesecons:redstone", "mesecons:redstone", "mcl_nether:quartz" },
{ "mcl_core:cobble", "mcl_core:cobble", "mcl_core:cobble" },
},
})
if realtime then
-- Override basic functions for observing:
mcl_observers.add_node = minetest.add_node
mcl_observers.set_node = minetest.set_node
mcl_observers.swap_node = minetest.swap_node
mcl_observers.remove_node = minetest.remove_node
mcl_observers.bulk_set_node = minetest.bulk_set_node
function minetest.add_node(pos,node)
mcl_observers.add_node(pos,node)
local n = get_node({x=pos.x+1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==-1 then
mcl_observers.observer_activate({x=pos.x+1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x-1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==1 then
mcl_observers.observer_activate({x=pos.x-1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z+1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==-1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z+1})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z-1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z-1})
end
n = get_node({x=pos.x,y=pos.y-1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_u" then
mcl_observers.observer_activate({x=pos.x,y=pos.y-1,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y+1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_d" then
mcl_observers.observer_activate({x=pos.x,y=pos.y+1,z=pos.z})
end
end
function minetest.set_node(pos,node)
mcl_observers.set_node(pos,node)
local n = get_node({x=pos.x+1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==-1 then
mcl_observers.observer_activate({x=pos.x+1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x-1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==1 then
mcl_observers.observer_activate({x=pos.x-1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z+1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==-1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z+1})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z-1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z-1})
end
n = get_node({x=pos.x,y=pos.y-1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_u" then
mcl_observers.observer_activate({x=pos.x,y=pos.y-1,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y+1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_d" then
mcl_observers.observer_activate({x=pos.x,y=pos.y+1,z=pos.z})
end
end
function minetest.swap_node(pos,node)
mcl_observers.swap_node(pos,node)
local n = get_node({x=pos.x+1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==-1 then
mcl_observers.observer_activate({x=pos.x+1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x-1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==1 then
mcl_observers.observer_activate({x=pos.x-1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z+1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==-1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z+1})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z-1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z-1})
end
n = get_node({x=pos.x,y=pos.y-1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_u" then
mcl_observers.observer_activate({x=pos.x,y=pos.y-1,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y+1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_d" then
mcl_observers.observer_activate({x=pos.x,y=pos.y+1,z=pos.z})
end
end
function minetest.remove_node(pos)
mcl_observers.remove_node(pos)
local n = get_node({x=pos.x+1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==-1 then
mcl_observers.observer_activate({x=pos.x+1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x-1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==1 then
mcl_observers.observer_activate({x=pos.x-1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z+1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==-1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z+1})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z-1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z-1})
end
n = get_node({x=pos.x,y=pos.y-1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_u" then
mcl_observers.observer_activate({x=pos.x,y=pos.y-1,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y+1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_d" then
mcl_observers.observer_activate({x=pos.x,y=pos.y+1,z=pos.z})
end
end
function minetest.bulk_set_node(lst, node)
mcl_observers.bulk_set_node(lst, node)
for _, pos in pairs(lst) do
local n = get_node({x=pos.x+1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==-1 then
mcl_observers.observer_activate({x=pos.x+1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x-1,y=pos.y,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).x==1 then
mcl_observers.observer_activate({x=pos.x-1,y=pos.y,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z+1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==-1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z+1})
end
n = get_node({x=pos.x,y=pos.y,z=pos.z-1})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_o" and minetest.facedir_to_dir(n.param2).z==1 then
mcl_observers.observer_activate({x=pos.x,y=pos.y,z=pos.z-1})
end
n = get_node({x=pos.x,y=pos.y-1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_u" then
mcl_observers.observer_activate({x=pos.x,y=pos.y-1,z=pos.z})
end
n = get_node({x=pos.x,y=pos.y+1,z=pos.z})
if n and n.name and string.sub(n.name,1,24)=="mcl_observers:observer_d" then
mcl_observers.observer_activate({x=pos.x,y=pos.y+1,z=pos.z})
end
end
end
else -- if realtime then ^^^ else:
minetest.register_abm({
label = "Observer node check",
nodenames = {"mcl_observers:observer_off", "mcl_observers:observer_down_off", "mcl_observers:observer_up_off"},
interval = 1,
chance = 1,
action = function(pos, node)
observer_scan(pos)
end,
})
end
--[[
With the following code the observer will detect loading of areas where it is placed.
We need to restore signal generated by it before the area was unloaded.
Observer movement and atomic clock (one observer watches another) fails without this often.
But it WILL cause wrong single signal for all other cases, and I hope it's nothing.
After all, why it can't detect the loading of areas, if we haven't a better solution...
]]
minetest.register_lbm({
name = "mcl_observers:activate_lbm",
nodenames = {
"mcl_observers:observer_off",
"mcl_observers:observer_down_off",
"mcl_observers:observer_up_off",
"mcl_observers:observer_on",
"mcl_observers:observer_down_on",
"mcl_observers:observer_up_on",
},
run_at_every_load = true,
action = function(pos)
minetest.after(1, mcl_observers.observer_activate, {x=pos.x, y=pos.y, z=pos.z})
end,
})
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