A Single hole can take up to two straight edges of its face as references,
each with the distance of the hole's centre from that edge's line, measured
in the face's plane. `solid.hole` takes them as `references: [{edge, distance}]`;
the edges are found again by their persistent names, else their points, so
the hole follows them when the part changes, and each distance is a
parameter. A bad reference (no edge there, a curved edge, one square to the
face, parallel edges, a negative distance, a centre off the face) is refused.
In the Hole dialog, Reference 1 and 2 follow the face, each with its Distance
row; the canvas shows each distance as a dimension from its edge to the hole,
with a box just past the edge to type it in. Picking an edge measures its
distance (and its box takes the keyboard), typing one moves the hole, and
moving the hole measures them again. Edit Feature picks the edges again with
their distances.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Jacques
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