Serpentine3D 0.8.0

Added

• A section cut is hatched by what it cut through. A detail with a
  section on it drew every cut face the same, so a drawing of a concrete
  wall with a steel pipe through it read as one material. The cut now
  carries the object it came from, and each face is drawn in the hatch
  of that object's layer: cross for the concrete, solid for the steel,
  plain lines for a layer that says nothing. Solid is a flood and not a
  line pattern, so a cut face keeps its bores open where a set of lines
  could not. Screen and plot ask the same two functions, so the sheet
  and the PDF cannot disagree. Clicking a cut face with hatch in
  Region mode opens the prompt on the material that was cut, so
  dropping a real hatch into a face does not quietly change what the
  face is made of.

• A layer says what its material is hatched with. A drawing is read by
  its fills, and what a thing is made of belongs to the layer rather than to
  the afternoon it was drawn on. Set Concrete to cross once and the hatch
  command opens on cross every time it is drawn on Concrete, in Corners mode
  and in Region mode, so hatching a wall is a click and an Enter. It stays a
  prompt, so the one region in another material still gets what you type.
  Set it from the Layers row menu, on every picked layer at once, or with
  layer and its new Hatch action. A layer that says nothing leaves the
  command where it was, on lines.

• section: draw a line across the model and get the cut back. Pick
  the objects, then the two points the saw goes through. The plane stands
  on that line and leans with the construction plane, so the same two
  points cut vertically in Front and horizontally in Top. A solid gives
  back the filled face rather than its outline, which is what a section
  drawing shows and what a hatch will need: a pipe cut across stays a ring
  of wall with a bore down the middle instead of reading as two unrelated
  circles. A surface has no inside, so it gives the curve. Everything
  lands on a Sections layer, and the objects you picked are left alone.

Fixed

• A hatch over a section leaves the holes in it empty. A cut through
  a pipe is a ring of wall with a bore down the middle, and hatching it
  as one outline filled the bore in, so the drawing said "bar" where the
  model said "pipe". A detail's section cut now comes back as regions,
  the ring around the outside plus whatever is punched out of it, and
  hatch in Region mode picks that up when you click on the wall. The
  screen and the plot used to work the hatching out separately and could
  disagree about the same cut; they now ask one function, so what you
  see on the sheet is what comes out of the PDF.

• The Layers panel is as wide as its columns need, not as wide as our
  own font wanted. The panel opens at a set width and the layer name
  takes whatever the four narrow columns beside it leave, so on a machine
  whose sans-serif is wider than the one this was measured on there was
  nothing left and the layer you draw on read Defa.... The panel now
  says how many pixels short it is and the window hands them over. A width
  you have set yourself is left alone.