indigenous bentwood

A board bent round a kerf into a corner, as at the corners of an indigenous bentwood box. On either side of the kerf a stub, rounded underneath by the quadrant of the round dovetail bit and cut back above it in an angled face through the quadrant's center, and under the floor a thin strip. The board bends at the strip until the two faces meet, at a bend of twice their angle to the vertical: the rounded undersides of the stubs then join into one arc, and the strip lies on it without a gap. Set the distance between the stubs, which come together until they touch, the angle of their faces, their radius, the size of the board and the bend angle in the control panel, or animate the bend: the strip data give its length and how much its faces are compressed or stretched once the corner has closed. With photo render off, the strip turns blue where it is compressed and red where it is stretched as it bends, and stays grey like the rest of the board where it keeps its length, on the scale under the strip data.