airutils/attach_extern_ent.lua

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local function attach_entity(self, target_obj, dest_pos, relative_pos, entity_name, inv_id)
if not target_obj then return end
if self.object then
local ent = target_obj:get_luaentity()
if self._vehicle_custom_data then
target_obj:set_pos(dest_pos)
target_obj:set_attach(self.object,'',relative_pos,{x=0,y=0,z=0})
self._vehicle_custom_data.simple_external_attach_entity = entity_name
self._vehicle_custom_data.simple_external_attach_pos = relative_pos
self._vehicle_custom_data.simple_external_attach_invid = inv_id --why?! Because I can identify the target entity by it's inventory ;)
end
end
end
function airutils.dettach_entity(self)
if not self._vehicle_custom_data then return end
if not self._vehicle_custom_data.simple_external_attach_entity then return end
local entity_name = self._vehicle_custom_data.simple_external_attach_entity
local relative_pos = self._vehicle_custom_data.simple_external_attach_pos
local inv_id = self._vehicle_custom_data.simple_external_attach_invid
local pos = self.object:get_pos()
local velocity = self.object:get_velocity()
local nearby_objects = minetest.get_objects_inside_radius(pos, 32)
for i,obj in ipairs(nearby_objects) do
local ent = obj:get_luaentity()
if ent then
if ent._inv_id then
if ent._inv_id == inv_id then
local rotation = self.object:get_rotation()
local direction = rotation.y
local move = -1*relative_pos.z/10
pos.x = pos.x + move * math.sin(direction)
pos.z = pos.z + move * math.cos(direction)
pos.y = pos.y + self.initial_properties.collisionbox[2] - ent.initial_properties.collisionbox[2]
obj:set_detach()
obj:set_pos(pos)
obj:set_rotation(rotation)
obj:set_velocity(velocity)
--clear
self._vehicle_custom_data.simple_external_attach_entity = nil
self._vehicle_custom_data.simple_external_attach_pos = nil
self._vehicle_custom_data.simple_external_attach_invid = nil
break
end
end
end
end
end
function airutils.simple_external_attach(self, relative_pos, entity_name, radius)
radius = radius or 12
if self.object then
local pos = self.object:get_pos()
local nearby_objects = minetest.get_objects_inside_radius(pos, radius)
for i,obj in ipairs(nearby_objects) do
if obj == self.object then
table.remove(nearby_objects,i)
end
local ent = obj:get_luaentity()
if ent then
if ent.name == entity_name then
local dest_pos = vector.new(pos)
dest_pos = vector.add(dest_pos, relative_pos)
attach_entity(self, nearby_objects[i], dest_pos, relative_pos, entity_name, ent._inv_id)
return
end
end
end
end
end
--execute on load
function airutils.restore_external_attach(self)
if not self._vehicle_custom_data then return end
if not self._vehicle_custom_data.simple_external_attach_invid then return end
local pos = self.object:get_pos()
local dest_pos = vector.new(pos)
local entity_name = self._vehicle_custom_data.simple_external_attach_entity
local relative_pos = self._vehicle_custom_data.simple_external_attach_pos
local inv_id = self._vehicle_custom_data.simple_external_attach_invid
dest_pos = vector.add(dest_pos, relative_pos)
minetest.after(0.3, function()
local nearby_objects = minetest.get_objects_inside_radius(pos, 32)
local ent
for i,obj in ipairs(nearby_objects) do
ent = obj:get_luaentity()
if ent then
--minetest.chat_send_all(dump(ent.name))
if ent._inv_id then
--minetest.chat_send_all(">> "..dump(ent._inv_id).." >> "..dump(inv_id))
if ent._inv_id == inv_id then
--minetest.chat_send_all("++ "..dump(ent._inv_id).." ++ "..dump(inv_id))
local target_obj = nearby_objects[i]
target_obj:set_pos(dest_pos)
target_obj:set_attach(self.object,'',relative_pos,{x=0,y=0,z=0})
--attach_entity(self, nearby_objects[i], dest_pos, relative_pos, entity_name, inv_id)
return
end
end
end
end
end)
--clear
--self._vehicle_custom_data.simple_external_attach_entity = nil
--self._vehicle_custom_data.simple_external_attach_pos = nil
--self._vehicle_custom_data.simple_external_attach_invid = nil
end