Removed attached_node and fix "Placing a block on the ground where the player stands"

mods/core/init.lua

@@ -2,6 +2,7 @@ realtest = {}
 
 dofile(minetest.get_modpath("core").."/helper_functions.lua")
 dofile(minetest.get_modpath("core").."/drop.lua")
+dofile(minetest.get_modpath("core").."/place.lua")
 dofile(minetest.get_modpath("core").."/seasons.lua")
 dofile(minetest.get_modpath("core").."/creative.lua")
 dofile(minetest.get_modpath("core").."/player.lua")

mods/core/place.lua

@@ -0,0 +1,87 @@
+function minetest.item_place_node(itemstack, placer, pointed_thing)
+	local item = itemstack:peek_item()
+	local def = itemstack:get_definition()
+	if def.type ~= "node" or pointed_thing.type ~= "node" then
+		return itemstack
+	end
+
+	local under = pointed_thing.under
+	local oldnode_under = minetest.env:get_node(under)
+	local olddef_under = ItemStack({name=oldnode_under.name}):get_definition()
+	olddef_under = olddef_under or minetest.nodedef_default
+	local above = pointed_thing.above
+	local oldnode_above = minetest.env:get_node(above)
+	local olddef_above = ItemStack({name=oldnode_above.name}):get_definition()
+	olddef_above = olddef_above or minetest.nodedef_default
+
+	if not olddef_above.buildable_to and not olddef_under.buildable_to then
+		minetest.log("info", placer:get_player_name() .. " tried to place"
+			.. " node in invalid position " .. minetest.pos_to_string(above)
+			.. ", replacing " .. oldnode_above.name)
+		return
+	end
+
+	-- Place above pointed node
+	local place_to = {x = above.x, y = above.y, z = above.z}
+
+	-- If node under is buildable_to, place into it instead (eg. snow)
+	if olddef_under.buildable_to then
+		minetest.log("info", "node under is buildable to")
+		place_to = {x = under.x, y = under.y, z = under.z}
+	end
+	
+	if #minetest.env:get_objects_inside_radius(place_to, 1) ~= 0 then
+		return
+	end
+
+	minetest.log("action", placer:get_player_name() .. " places node "
+		.. def.name .. " at " .. minetest.pos_to_string(place_to))
+	
+	local oldnode = minetest.env:get_node(place_to)
+	local newnode = {name = def.name, param1 = 0, param2 = 0}
+
+	-- Calculate direction for wall mounted stuff like torches and signs
+	if def.paramtype2 == 'wallmounted' then
+		local dir = {
+			x = under.x - above.x,
+			y = under.y - above.y,
+			z = under.z - above.z
+		}
+		newnode.param2 = minetest.dir_to_wallmounted(dir)
+	-- Calculate the direction for furnaces and chests and stuff
+	elseif def.paramtype2 == 'facedir' then
+		local placer_pos = placer:getpos()
+		if placer_pos then
+			local dir = {
+				x = above.x - placer_pos.x,
+				y = above.y - placer_pos.y,
+				z = above.z - placer_pos.z
+			}
+			newnode.param2 = minetest.dir_to_facedir(dir)
+			minetest.log("action", "facedir: " .. newnode.param2)
+		end
+	end
+
+	-- Add node and update
+	minetest.env:add_node(place_to, newnode)
+
+	-- Run callback
+	if def.after_place_node then
+		-- Copy place_to because callback can modify it
+		local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
+		def.after_place_node(place_to_copy, placer)
+	end
+
+	-- Run script hook
+	local _, callback
+	for _, callback in ipairs(minetest.registered_on_placenodes) do
+		-- Copy pos and node because callback can modify them
+		local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
+		local newnode_copy = {name=newnode.name, param1=newnode.param1, param2=newnode.param2}
+		local oldnode_copy = {name=oldnode.name, param1=oldnode.param1, param2=oldnode.param2}
+		callback(place_to_copy, newnode_copy, placer, oldnode_copy)
+	end
+
+	itemstack:take_item()
+	return itemstack
+end