Factorio Runtime DocsVersion 2.0.73

The smooth orientation. It is a float in the range [0, 1) that covers a full circle, starting at the top and going clockwise.

This means a value of 0 indicates "north", a value of 0.5 indicates "south". For example then, a value of 0.625 would indicate "south-west", and a value of 0.875 would indicate "north-west".