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-rw-r--r--builtin/game/item.lua8
1 files changed, 8 insertions, 0 deletions
diff --git a/builtin/game/item.lua b/builtin/game/item.lua
index bf456a4e0..e51da6d6b 100644
--- a/builtin/game/item.lua
+++ b/builtin/game/item.lua
@@ -147,6 +147,14 @@ function core.wallmounted_to_dir(wallmounted)
return wallmounted_to_dir[wallmounted]
end
+function core.dir_to_yaw(dir)
+ return -math.atan2(dir.x, dir.z)
+end
+
+function core.yaw_to_dir(yaw)
+ return {x = -math.sin(yaw), y = 0, z = math.cos(yaw)}
+end
+
function core.get_node_drops(nodename, toolname)
local drop = ItemStack({name=nodename}):get_definition().drop
if drop == nil then