Polyline

A free-form contour — a flap, a holster panel, anything more complex than a rectangle or circle. Nodes can be placed as corners or smooth points right while drawing, and the shape can always be refined later with the Nodes tool.

LeatherDraft — the "Polyline" tool

How to draw

1. Click the "Polyline" button on the left panel or press L.
2. Click vertices one after another — a straight line stretches between them right away.
3. For a smooth node instead of a sharp corner — don't just click, but right after clicking, without releasing the mouse button, drag to the side. That produces a smooth node with a "handle" (a direction curve). That's exactly how all four rounded corners of the pocket and the smooth notch on top were made in the screenshot above — 15 vertices instead of a plain rectangle, yet none of them needed coordinates typed in by hand.
4. To finish: double-click or Enter. Esc cancels the drawing, Backspace removes the last placed point.

The contour in the screenshot is closed — the last point is connected to the first, and the "Closed contour" checkbox in the properties is on. For an open contour (say, a fold line rather than a whole piece) — just finish with a double-click without returning to the start.

Geometry

X, Y

Position of the contour's anchor point (its notional top-left corner).

Vertices

How many nodes are in the contour — grows if you add points with the "Nodes" tool.

Corner rounding, Corner chamfer

Set the treatment for all corner (non-smooth) nodes of the contour at once, with a single number. Chamfer cuts the corner with a straight line instead of an arc — it's a contour shape, not thinning the leather's edge. To treat one specific corner individually, see "Corner treatment" in the Nodes article.

Rotation

Rotation angle for the whole contour, in degrees.

Closed contour

Checkbox — whether the last point connects to the first. Can be toggled on or off even after drawing.

Line length

Perimeter (or length, if the contour is open) — calculated automatically.

Common piece properties

The "Piece" block is the same set of fields as the rectangle and circle: line type, leather thickness and cut quantity, "Stitch along contour", "Find Center", offset with a margin. Covered in detail in the Rectangle article. A polyline has no "Convert to curve" button — it's already a curve.