Fix crash sometimes with tubes

diff --git a/item_transport.lua b/item_transport.lua
index 3a9943b97e61736957745b41a3b0ff132ceaa439..bb6f91be60a86705f3ced45b64c908355c6f94dd 100644 (file)
--- a/item_transport.lua
+++ b/item_transport.lua
@@ -197,6 +197,10 @@ function tube_item(pos, item)
        return obj
 end
 
+local function roundpos(pos)
+       return {x=math.floor(pos.x+0.5),y=math.floor(pos.y+0.5),z=math.floor(pos.z+0.5)}
+end
+
 minetest.register_entity("pipeworks:tubed_item", {
        initial_properties = {
                hp_max = 1,
@@ -278,7 +282,10 @@ minetest.register_entity("pipeworks:tubed_item", {
        end,
 
        on_step = function(self, dtime)
-       if self.start_pos then
+       if self.start_pos==nil then
+               local pos = self.object:getpos()
+               self.start_pos=roundpos(pos)
+       end
        local pos = self.object:getpos()
        local node = minetest.env:get_node(pos)
        local meta = minetest.env:get_meta(pos)
@@ -356,13 +363,12 @@ minetest.register_entity("pipeworks:tubed_item", {
                self.object:setvelocity(velocity)
        end
 
-       end
 end
 })
 
 
-function addVect(pos,vect)
-return {x=pos.x+vect.x,y=pos.y+vect.y,z=pos.z+vect.z}
+local function addVect(pos,vect)
+       return {x=pos.x+vect.x,y=pos.y+vect.y,z=pos.z+vect.z}
 end
 
 adjlist={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=0,y=1,z=0},{x=0,y=-1,z=0},{x=1,y=0,z=0},{x=-1,y=0,z=0}}