dfcaverns/looped_node_sound/init.lua

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Lua
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2022-08-16 08:03:43 +02:00
looped_node_sound = {}
looped_node_sound.register = function(def)
local handles = {}
local timer = 0
-- Parameters
local radius = def.radius or 8 -- node search radius around player
local cycle = def.cycle_time or 3 -- Cycle time for sound updates
assert(def.node_list, "[looped_sound_node] register function called without a node_list in its definition")
assert(def.sound, "[looped_sound_node] register function called without a sound in its definition")
local node_list = def.node_list
local sound = def.sound
local gain_per_node = def.gain_per_node or 0.125
local gain_max = def.max_gain or 1.0
local max_hear_distance = def.max_hear_distance or 32
-- Update sound for player
function update_player_sound(player)
local player_name = player:get_player_name()
-- Search for nodes in radius around player
local ppos = player:get_pos()
local areamin = vector.subtract(ppos, radius)
local areamax = vector.add(ppos, radius)
local fpos, num = minetest.find_nodes_in_area(
areamin,
areamax,
node_list
)
-- Total number of nodes in radius
local total = 0
for _, count in pairs(num) do
total = total + count
end
-- Stop previous sound
if handles[player_name] then
minetest.sound_stop(handles[player_name])
end
-- If nodes
if total > 0 then
-- Find centre of node positions
local fposmid = fpos[1]
-- If more than 1 node
if #fpos > 1 then
local fposmin = areamax
local fposmax = areamin
for i = 1, #fpos do
local fposi = fpos[i]
if fposi.x > fposmax.x then
fposmax.x = fposi.x
end
if fposi.y > fposmax.y then
fposmax.y = fposi.y
end
if fposi.z > fposmax.z then
fposmax.z = fposi.z
end
if fposi.x < fposmin.x then
fposmin.x = fposi.x
end
if fposi.y < fposmin.y then
fposmin.y = fposi.y
end
if fposi.z < fposmin.z then
fposmin.z = fposi.z
end
end
fposmid = vector.divide(vector.add(fposmin, fposmax), 2)
end
-- Play sound
local handle = minetest.sound_play(sound, {
pos = fposmid,
to_player = player_name,
gain = math.min(total * gain_per_node, gain_max),
max_hear_distance = max_hear_distance,
loop = true -- In case of lag
})
-- Store sound handle for this player
if handle then
handles[player_name] = handle
else
handles[player_name] = nil
end
else
handles[player_name] = nil
end
end
-- Cycle for updating players sounds
minetest.register_globalstep(function(dtime)
timer = timer + dtime
if timer < cycle then
return
end
timer = 0
local players = minetest.get_connected_players()
for n = 1, #players do
update_player_sound(players[n])
end
end)
-- Stop sound and clear handle on player leave
minetest.register_on_leaveplayer(function(player)
local player_name = player:get_player_name()
if handles[player_name] then
minetest.sound_stop(handles[player_name])
handles[player_name] = nil
end
end)
end