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