The signed horizontal advance between consecutive line origins (-lineHeight / sin θ).
Positive marches right (up-slanted text), negative marches left (down-slanted).
The rotation, CSS degrees clockwise, normalized to [0, 360). Never 0 or 180 (callers skip).
The axis-aligned union of all strips — the painted footprint (may exceed the content box).
The available text length along a rotated line before it exhausts the content height. Wrapped
text breaks at this length; fit tests (####, repeat fills) measure against it.
One entry per laid-out text line, in reading order.
The placed geometry for all lines — see layoutLines.