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-- variables taken by the start... function
--
-- pos and node are as usual, from e.g. on_rightclick.
--
-- in the { particledef } table:
--
-- outletx/y/z are the exact coords of the starting point
-- for the spawner, relative to the center of the node
--
-- velocityx/y/z are the speed of the particles,
-- (x and z are relative to a node placed while looking north/facedir 0)
-- negative Y values flow downward.
--
-- spread is the radius from the starting point,
-- along X and Z only, to randomly spawn particles.
--
-- soundname is the filename (without .ogg) of the sound file
-- to be played along with the particle stream
function homedecor.start_particle_spawner(pos, node, particledef, soundname)
local this_spawner_meta = minetest.get_meta(pos)
local id = this_spawner_meta:get_int("active")
local s_handle = this_spawner_meta:get_int("sound")
if id ~= 0 then
if s_handle then
minetest.after(0, function(s_handle)
minetest.sound_stop(s_handle)
end, s_handle)
end
minetest.delete_particlespawner(id)
this_spawner_meta:set_int("active", nil)
this_spawner_meta:set_int("sound", nil)
return
end
local fdir = node.param2
if fdir and fdir < 4 and (not id or id == 0) then
local outletx = particledef.outlet.x
local outlety = particledef.outlet.y
local outletz = particledef.outlet.z
local velocityx = particledef.velocity_x
local velocityy = particledef.velocity_y
local velocityz = particledef.velocity_z
local spread = particledef.spread
local minx_t = { outletx - spread, -outletz - spread, outletx - spread, outletz - spread }
local maxx_t = { outletx + spread, -outletz + spread, outletx + spread, outletz + spread }
local minz_t = { -outletz - spread, outletx - spread, outletz - spread, outletx - spread }
local maxz_t = { -outletz + spread, outletx + spread, outletz + spread, outletx + spread }
local minvelx_t = { velocityx.min, velocityz.min, -velocityx.max, -velocityz.max }
local maxvelx_t = { velocityx.max, velocityz.max, -velocityx.min, -velocityz.min }
local minvelz_t = { velocityz.min, velocityx.min, -velocityz.max, velocityx.min }
local maxvelz_t = { velocityz.max, velocityx.max, -velocityz.min, velocityx.max }
local minx = minx_t[fdir + 1]
local maxx = maxx_t[fdir + 1]
local minz = minz_t[fdir + 1]
local maxz = maxz_t[fdir + 1]
local minvelx = minvelx_t[fdir + 1]
local minvelz = minvelz_t[fdir + 1]
local maxvelx = maxvelx_t[fdir + 1]
local maxvelz = maxvelz_t[fdir + 1]
id = minetest.add_particlespawner({
amount = 60,
time = 0,
collisiondetection = true,
minpos = {x=pos.x - minx, y=pos.y + outlety, z=pos.z - minz},
maxpos = {x=pos.x - maxx, y=pos.y + outlety, z=pos.z - maxz},
minvel = {x = minvelx, y = velocityy, z = minvelz},
maxvel = {x = maxvelx, y = velocityy, z = maxvelz},
minacc = {x=0, y=0, z=0},
maxacc = {x=0, y=-0.05, z=0},
minexptime = 2,
maxexptime = 4,
minsize = 0.5,
maxsize = 1,
texture = "homedecor_water_particle.png",
})
s_handle = minetest.sound_play(soundname, {
pos = pos,
max_hear_distance = 5,
loop = true
})
this_spawner_meta:set_int("active", id)
this_spawner_meta:set_int("sound", s_handle)
return
end
end
function homedecor.stop_particle_spawner(pos)
local this_spawner_meta = minetest.get_meta(pos)
local id = this_spawner_meta:get_int("active")
local s_handle = this_spawner_meta:get_int("sound")
if id ~= 0 then
minetest.delete_particlespawner(id)
end
if s_handle then
minetest.after(0, function(s_handle)
minetest.sound_stop(s_handle)
end, s_handle)
end
this_spawner_meta:set_int("active", nil)
this_spawner_meta:set_int("sound", nil)
end
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