Join Curves

Concatenates two Paths into one. With Auto Reverse on, the second path is automatically flipped so its start point is closest to the first path's end — minimising the seam distance.

Node

Interactive preview is available in the interactive reader.

Sockets

a (in): Path. Required — the first curve.
b (in): Path. Required — the second curve.
path (out): Path — a concatenated with b (possibly reversed).

Parameters

Auto Reverse: When on, b is flipped if b.first is closer to a.last than b.last is. When off, b is appended as-is. Default: on.

How It Works

Compute dist(a.last, b.first) and dist(a.last, b.last).
If Auto Reverse is on and the second distance is smaller, reverse b.
Append b to a. If a.last == b.first (within a tiny epsilon), the duplicate endpoint is skipped so the joined path has no repeated points.

No geometric stitching is performed — if the endpoints don't coincide, the joined path has a straight segment between them. For seamless joins, ensure a.last and b.first are at the same position (or close enough that the segment degenerates to zero length).