Feat/zigzag dir auto #36

2026-10-22T00:58:16+02:00

dstadelm commented

2026-10-22 00:58:16 +02:00

First-time contributor

As the ports have a cardinal direction the orientation of the zigzag can be deduced from this.

dstadelm added 5 commits 2026-10-22 00:58:16 +02:00

deps: update CeTZ 0.3.4 to 0.5.2 with coordinate fixes 77eb4fa946

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.

deps: update tidy to 0.4.3 ac087087c5

chore: update minimum compiler version to 0.15.0 df4c956a0b

feat: add anchor-based zigzag bend placement via zigzag-at 2c6e5f44df

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.

feat: auto-detect zigzag-dir from port anchors beda61b9f4

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.

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Reference: HEL/circuiteria#36

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