Dovetail shelf¶

from woodwright.examples import projects

design = projects.dovetail_shelf(height=625)

left_right  500 x 200 x 20 mm  oak, 2 pieces: left, right
            - 2 x sockets for 3 dovetails
            - dado 20 mm, 6.5 deep, in bottom_face
top_bottom  400 x 200 x 20 mm  oak, 2 pieces: top, bottom
            - 2 x 3 dovetails, slope 1:7
shelf       373 x 200 x 20 mm  oak

def dovetail_shelf(
    height: float = 500,
    width: float = 400,
    depth: float = 200,
    tail_count: int = 3,
    stock: Stock = OAK,
) -> Assembly:
    """A shelf of two stories: a case through-dovetailed at its four corners
    and a middle shelf in dados; outside sizes.

    The sides have pins at both ends, the top and the bottom tails, so the
    tails show on the sides. The sides' and the top's design lengths are
    shorter by the boards they reach through.
    """
    t = stock.thickness
    asm = Assembly("dovetail_shelf", root_location=CASE_SIDE)
    left = asm.add(Board("left", stock, length=height - 2 * t, width=depth))
    right = asm.add(Board("right", stock, length=height - 2 * t, width=depth, mirror=True))
    top = asm.add(Board("top", stock, length=width - 2 * t, width=depth))
    bottom = asm.add(Board("bottom", stock, length=width - 2 * t, width=depth, mirror=True))
    shelf = asm.add(Board("shelf", stock, length=width - 2 * t, width=depth))
    for side, top_end, bottom_end, shelf_end in [
        (left, top.left_end, bottom.left_end, shelf.left_end),
        (right, top.right_end, bottom.right_end, shelf.right_end),
    ]:
        asm.join(ThroughDovetail(tails=top_end, pins=side.right_end, tail_count=tail_count))
        asm.join(ThroughDovetail(tails=bottom_end, pins=side.left_end, tail_count=tail_count))
        asm.join(
            DadoJoint(
                dado=side.bottom_face,
                end=shelf_end,
                position=offset((height - 2 * t) / 2, side.right_end),
            )
        )
    return asm