API field
Ridge gap
Ewf: the distance between the two faces' top edges
What it is
The horizontal distance between the top edges of the two faces of an east-west ridge. Each face's centre then lies gap / 2 + width / 2 × cos(tilt) across the ridge from the placement centre. Other kinds ignore it. Zero or positive; default 0. Lengths are in the scene's unit, the same for every length.
Typical values and how to get it
From the racking drawing: the opening between the two top edges, often a few centimetres to 0.3 m. Leave it at 0 when the faces meet.
API
scene.types.gap