b9c2c3bd0a
* Check if node has a definition table before attempting to evaluate attributes. * Define local variable to cache multiple accesses to `registered_nodes[]` and improve readability. * Reduce redundant `== false` condition check.
66 lines
2.3 KiB
Lua
66 lines
2.3 KiB
Lua
local pr = PseudoRandom(os.time()*5)
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local offsets = {}
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for x=-2, 2 do
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for z=-2, 2 do
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table.insert(offsets, {x=x, y=0, z=z})
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end
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end
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--[[ Periodically check and teleport mob to owner if not sitting (order ~= "sit") and
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the owner is too far away. To be used with do_custom. Note: Optimized for mobs smaller than 1×1×1.
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Larger mobs might have space problems after teleportation.
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* dist: Minimum required distance from owner to teleport. Default: 12
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* teleport_check_interval: Optional. Interval in seconds to check the mob teleportation. Default: 4 ]]
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mobs_mc.make_owner_teleport_function = function(dist, teleport_check_interval)
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return function(self, dtime)
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-- No teleportation if no owner or if sitting
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if not self.owner or self.order == "sit" then
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return
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end
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if not teleport_check_interval then
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teleport_check_interval = 4
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end
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if not dist then
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dist = 12
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end
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if self._teleport_timer == nil then
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self._teleport_timer = teleport_check_interval
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return
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end
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self._teleport_timer = self._teleport_timer - dtime
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if self._teleport_timer <= 0 then
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self._teleport_timer = teleport_check_interval
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local mob_pos = self.object:get_pos()
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local owner = minetest.get_player_by_name(self.owner)
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if not owner then
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-- No owner found, no teleportation
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return
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end
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local owner_pos = owner:get_pos()
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local dist_from_owner = vector.distance(owner_pos, mob_pos)
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if dist_from_owner > dist then
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-- Check for nodes below air in a 5×1×5 area around the owner position
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local check_offsets = table.copy(offsets)
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-- Attempt to place mob near player. Must be placed on walkable node below a non-walkable one. Place inside that air node.
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while #check_offsets > 0 do
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local r = pr:next(1, #check_offsets)
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local telepos = vector.add(owner_pos, check_offsets[r])
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local telepos_below = {x=telepos.x, y=telepos.y-1, z=telepos.z}
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table.remove(check_offsets, r)
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-- Long story short, spawn on a platform
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local trynode = minetest.registered_nodes[minetest.get_node(telepos).name]
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local trybelownode = minetest.registered_nodes[minetest.get_node(telepos_below).name]
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if trynode and not trynode.walkable and
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trybelownode and trybelownode.walkable then
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-- Correct position found! Let's teleport.
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self.object:set_pos(telepos)
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return
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end
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end
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end
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end
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end
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end
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