Derive candidate alignment lines from a set of AABBs (siblings) plus an optional page box. Each box contributes up to 3 guides per axis: the two edges and the center. Overlapping offsets collapse to one candidate.
Derive candidate alignment lines from a set of AABBs (siblings) plus an optional page box. Each box contributes up to 3 guides per axis: the two edges and the center. Overlapping offsets collapse to one candidate.