On Thu, 2024-05-23 at 22:17 +0200, Marcus Poller wrote: > You should do as much in 2d as possible. That is easier to handle > mentally, easy to describe in pictures. > For instance: > >     include <BOSL2/std.scad> >     projection() >     hull() { >       sphere(6); >       right(24) sphere(4); >     } > > should be > >     include <BOSL2/std.scad> >     hull() { >       circle(6) >       right(24) circle(4) >     } I sometimes think in 2D, but just as often in 3D. > That is why we need the slices (slices labeled in attachment). > > If you want to do a path sweep (or a hullSeries), you need to > describe slice1 and slice2. I attached a few samples what the might > look like on page 2. You need to estimate their shape and get > measurements. The shapes I propose are: > >  (a) cylindrical >  (b) spherical >  (c) two spherical (requires 3 measurements: axis, r_greater, > r_lower) > > There is another component for path sweep - that is centerline > (bottom line and top line will do as well, whatever is easier for you > to measure). Is your bottom line straight? > If not, you will need to provide an aproximation. Pushing your handle > onto a piece of squared paper, drawing the outer line with a pencil, > and taking coordinates from the paper will help. > > Having a cut-through 2d shape (slice1 and slice2) and a path > (centerline), you can recreate the handle using path sweep. OK... I have that figured out. I have printed a sheet of graph paper, and printed a large outline of the shape. I will be cutting the large shape out of the paper, and placing it on the graph paper, then using a pencil to mark points along the slice1 and slice2 lines, each time marking point in pairs. I will then find the mid-point of each pair, and use those coordinates to generate a path. I already have a shape to sweep along the path. > For the knob you need to measure two cylinders. I call them circle1 > (larger diameter) and its height1 and circle2 (smaller diabeter) ind > its height2. Those measurements will provide the rounding of the > knob. I already have the knob. BOSL2 generates it easily, including the roundion on top and bottom. > The thing hardest to catch is slice3. I will need a sketch from you > of its shape, labeled slice3. Is slice3 constant along the > circumference of circle3? > You will also need to provide an approximation of circle3's radius. > The piece of plastic sticking to circle3s circumference will be > another path sweep. If I understand you correctly, you are advocating doing two path sweeps, one along slice1, and the other along slice2. If I have that wrong, please let me know. > There is a lot of detail in this handle, it will take time, patience, > measurements and iterations to get it right. Are you still shure you > want to put that much effort into it? I'm sure. Path Sweep is something I've been avoiding, as I have yet to fully understand it