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celevator.drives.null = {
name = "Null Drive",
description = "Simulation only, no movement, for testing and demonstration",
nname = "celevator:drive_null",
soundhandles = {},
}
local function update_ui(pos)
local meta = minetest.get_meta(pos)
local apos = tonumber(meta:get_string("apos")) or 0
local status = "Idle"
local vel = tonumber(meta:get_string("vel")) or 0
if vel > 0 then
status = string.format("Running: Up, %0.02f m/s",vel)
elseif vel < 0 then
status = string.format("Running: Down, %0.02f m/s",math.abs(vel))
end
meta:set_string("infotext",string.format("Null Drive - %s - Position: %0.02f m",status,apos))
end
local function playbuzz(pos)
local hash = minetest.hash_node_position(pos)
if celevator.drives.null.soundhandles[hash] == "cancel" then return end
celevator.drives.null.soundhandles[hash] = minetest.sound_play("celevator_drive_run",{
pos = pos,
loop = true,
gain = 0.4,
})
end
local function startbuzz(pos)
local hash = minetest.hash_node_position(pos)
if celevator.drives.null.soundhandles[hash] == "cancel" then
celevator.drives.null.soundhandles[hash] = nil
return
end
if celevator.drives.null.soundhandles[hash] then return end
celevator.drives.null.soundhandles[hash] = "pending"
minetest.after(0.5,playbuzz,pos)
end
local function stopbuzz(pos)
local hash = minetest.hash_node_position(pos)
if not celevator.drives.null.soundhandles[hash] then return end
if celevator.drives.null.soundhandles[hash] == "pending" then
celevator.drives.null.soundhandles[hash] = "cancel"
end
if type(celevator.drives.null.soundhandles[hash]) ~= "string" then
minetest.sound_stop(celevator.drives.null.soundhandles[hash])
celevator.drives.null.soundhandles[hash] = nil
end
end
minetest.register_node("celevator:drive_null",{
description = celevator.drives.null.name,
groups = {
cracky = 1,
},
tiles = {
"celevator_cabinet_sides.png",
"celevator_cabinet_sides.png",
"celevator_cabinet_sides.png",
"celevator_cabinet_sides.png",
"celevator_cabinet_sides.png",
"celevator_drive_front.png",
},
paramtype = "light",
paramtype2 = "facedir",
drawtype = "nodebox",
node_box = {
type = "fixed",
fixed = {
{-0.4,-0.4,-0.1,0.4,0.4,0.5},
{-0.5,-0.3,0.4,-0.4,-0.22,0.32},
{-0.5,0.22,0.4,-0.4,0.3,0.32},
},
},
_celevator_drive_type = "null",
after_place_node = function(pos)
local meta = minetest.get_meta(pos)
meta:set_string("apos","0")
meta:set_string("dpos","0")
meta:set_string("vel","0")
meta:set_string("maxvel","0.2")
update_ui(pos)
end,
on_destruct = stopbuzz,
})
function celevator.drives.null.step(dtime)
local nulldrives_running = minetest.deserialize(celevator.storage:get_string("nulldrives_running")) or {}
local save = false
for i,hash in ipairs(nulldrives_running) do
save = true
local pos = minetest.get_position_from_hash(hash)
local node = minetest.get_node(pos)
local sound = false
if node.name == "ignore" then
minetest.forceload_block(pos,true)
elseif node.name ~= "celevator:drive_null" then
table.remove(nulldrives_running,i)
else
local meta = minetest.get_meta(pos)
local apos = tonumber(meta:get_string("apos")) or 0
local dpos = tonumber(meta:get_string("dpos")) or 0
local maxvel = tonumber(meta:get_string("maxvel")) or 0.2
local dremain = math.abs(dpos-apos)
local vel = maxvel
if dremain < 0.5 then vel = math.min(0.2,vel) end
local stepdist = vel*dtime
if dpos > apos then
local newpos = apos + stepdist
if newpos < dpos then
meta:set_string("apos",tostring(newpos))
meta:set_string("vel",vel)
sound = true
else
meta:set_string("apos",tostring(dpos))
meta:set_string("vel",0)
sound = false
end
elseif dpos < apos then
local newpos = apos - stepdist
if newpos > dpos then
meta:set_string("apos",tostring(newpos))
meta:set_string("vel",0-vel)
sound = true
else
meta:set_string("apos",tostring(dpos))
meta:set_string("vel",0)
sound = false
end
else
table.remove(nulldrives_running,i)
end
end
update_ui(pos)
if sound then
startbuzz(pos)
else
stopbuzz(pos)
end
end
if save then
celevator.storage:set_string("nulldrives_running",minetest.serialize(nulldrives_running))
end
end
minetest.register_globalstep(celevator.drives.null.step)
function celevator.drives.null.moveto(pos,target)
local meta = minetest.get_meta(pos)
meta:set_string("dpos",tostring(target))
local hash = minetest.hash_node_position(pos)
local nulldrives_running = minetest.deserialize(celevator.storage:get_string("nulldrives_running")) or {}
local running = false
for _,dhash in ipairs(nulldrives_running) do
if hash == dhash then
running = true
break
end
end
if not running then
table.insert(nulldrives_running,hash)
celevator.storage:set_string("nulldrives_running",minetest.serialize(nulldrives_running))
end
end
function celevator.drives.null.resetpos(pos)
celevator.drives.null.moveto(pos,0)
end
function celevator.drives.null.estop(pos)
local meta = minetest.get_meta(pos)
meta:set_string("dpos",meta:get_string("apos"))
meta:set_string("vel","0")
end
function celevator.drives.null.setmaxvel(pos,maxvel)
local meta = minetest.get_meta(pos)
meta:set_string("maxvel",tostring(maxvel))
end
function celevator.drives.null.rezero(pos)
celevator.drives.null.moveto(pos,0)
end
function celevator.drives.null.getstatus(pos,call2)
local node = minetest.get_node(pos)
if node.name == "ignore" and not call2 then
minetest.forceload_block(pos,true)
return celevator.drives.null.get_status(pos,true)
elseif node.name ~= "celevator:drive_null" then
minetest.log("error","[celevator] [null drive] Could not load drive status at "..minetest.pos_to_string(pos))
return
else
local meta = minetest.get_meta(pos)
local ret = {}
ret.apos = tonumber(meta:get_string("apos")) or 0
ret.dpos = tonumber(meta:get_string("dpos")) or 0
ret.vel = tonumber(meta:get_string("vel")) or 0
ret.maxvel = tonumber(meta:get_string("maxvel")) or 0.2
ret.neareststop = ret.apos
return ret
end
end
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