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Feat/zigzag dir auto #36

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dstadelm wants to merge 5 commits from dstadelm/circuiteria:feat/zigzag-dir-auto into main
pull from: dstadelm/circuiteria:feat/zigzag-dir-auto
merge into: HEL:main
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5 Commits
Author SHA1 Message Date
David Stadelmann beda61b9f4 feat: auto-detect zigzag-dir from port anchors 
When `zigzag-dir` is `auto` (the new default), deduce it from the
endpoint port anchors using `detect-port-side`. East/west ports yield
"vertical" and north/south ports yield "horizontal". If the direction
cannot be deduced (no port anchor on either endpoint, or conflicting
directions) it falls back to "vertical", the previous default.
 2026-10-22 00:32:01 +02:00
David Stadelmann 2c6e5f44df feat: add anchor-based zigzag bend placement via zigzag-at 
Add the `zigzag-at` parameter to place the middle bend of a zigzag wire
on the axis of a referenced anchor. It overrides `zigzag-ratio`, which
now defaults to `auto` (resolving to 50%) so the two are mutually
exclusive. Accepted forms are an anchor name, any CeTZ coordinate, or
the scalar offset `(rel: <length>, to: <coord>)`.

Add the generic helpers this relies on and that other wire styles reuse:
- `normalize-scalar-offset(at, axis)` turns a scalar offset into an x or
  y offset; `normalize-zigzag-at` is a wrapper around it.
- `detect-port-side(anchor, ctx)` deduces the cardinal side a port faces
  by comparing it with its element's `.center` anchor.

Add the `zigzag-at` example.
 2026-10-22 00:31:52 +02:00
David Stadelmann df4c956a0b chore: update minimum compiler version to 0.15.0 2026-10-21 23:39:59 +02:00
David Stadelmann ac087087c5 deps: update tidy to 0.4.3 2026-10-21 23:39:59 +02:00
David Stadelmann 77eb4fa946 deps: update CeTZ 0.3.4 to 0.5.2 with coordinate fixes 
CeTZ 0.5.2 requires 3D coordinate vectors (x, y, z) for raw
coordinate tuples passed to coordinate.resolve(). Update internal
wire computations (dodge, guided) to use 3-element tuples, fix
.last() to .at(1) for y-component access on resolved coordinates,
and add a normalize-coord utility that automatically pads user-
provided 2D points (x, y) to (x, y, 0) so users do not need to
specify the z dimension.
 2026-10-21 23:39:59 +02:00