tenplus1/builtin_item: dropped items in minetest have physics and some special features - Codeberg.org

item_entity.lua replacement

edited by TenPlus1

Features:

• Items are destroyed by lava

• Items are pushed along by flowing water (thanks to QwertyMine3 and Gustavo6046)

• Items are removed after 900 seconds or the time that is specified by remove_items in minetest.conf (-1 disables it)

• Particle effects added

• Dropped items slide on nodes with {slippery} groups

• Items stuck inside solid nodes move to nearest empty space

• Can use new on_pickup() function if available

• Added 'dropped_step(self, pos, dtime, moveresult)' custom on_step for dropped items 'self.node_inside' contains node table that item is inside 'self.def_inside' contains node definition for above 'self.node_under' contains node table that is below item 'self.def_under' contains node definition for above 'self.age' holds age of dropped item in seconds 'self.itemstring' contains itemstring e.g. "default:dirt", "default:ice 20" 'self.is_moving' true if dropped item is moving 'pos' holds position of dropped item 'dtime' used for timers 'moveresult' table containing collision info

  return false to skip further checks by builtin_item

License: LGPLv2.1+

dropped_step() examples:

-- if gunpowder dropped on burning tnt or gunpowder then play sound and remove

if minetest.registered_items["tnt:gunpowder"] then

minetest.override_item("tnt:gunpowder", {
	dropped_step = function(self, pos)
		if (self.node_inside and self.node_inside.name == "tnt:gunpowder_burning")
		or (self.node_under and self.node_under.name == "tnt:tnt_burning") then
			minetest.sound_play("builtin_item_lava", {
				pos = pos,
				max_hear_distance = 6,
				gain = 0.5
			})
			self.itemstring = ""
			self.object:remove()
			return false -- return with no further action
		end
	end
})

end

-- if 2x mese crystal and 2x crystal spike dropped in pool of water_source -- then remove both and place a single crystal_ingot.

if minetest.registered_items["ethereal:crystal_spike"] then

minetest.override_item("ethereal:crystal_spike", {
	dropped_step = function(self, pos, dtime)
		self.ctimer = (self.ctimer or 0) + dtime
		if self.ctimer < 5.0 then return end
		self.ctimer = 0
		if self.node_inside
		and self.node_inside.name ~= "default:water_source" then
			return
		end
		local objs = core.get_objects_inside_radius(pos, 0.8)
		if not objs or #objs ~= 2 then return end
		local crystal, mese, ent = nil, nil, nil
		for k, obj in pairs(objs) do
			ent = obj:get_luaentity()
			if ent and ent.name == "__builtin:item" then
				if ent.itemstring == "default:mese_crystal 2"
				and not mese then
					mese = obj
				elseif ent.itemstring == "ethereal:crystal_spike 2"
				and not crystal then
					crystal = obj
				end
			end
		end
		if mese and crystal then
			mese:remove()
			crystal:remove()
			core.add_item(pos, "ethereal:crystal_ingot")
			return false -- return with no further action
		end
	end
})

end