Interface PencilPoint

A single pointer sample captured during a freehand pencil stroke.

pressure / tiltX / tiltY come straight from the underlying PointerEvent and let downstream consumers modulate stroke width or opacity by stylus input. Mouse and ordinary touch report pressure: 0.5 while a button is held, 0 otherwise (per the Pointer Events spec), so a consumer that wants stylus-only modulation should gate on pointerType from the originating event — the kit exposes usePointerStylus() for that.

The dispatcher accumulates these on the drag trail and hands the whole array to insertAction, which forwards it as the pencil insert extras' samples. A consumer that wants pressure-driven Stroke.vertexWidths reads it off the samples in its own insert dep (useDepSource('insert', …)) — see apps/site/demos/VertexWidthsDemo.tsx.