Hi Gord,

re:
> Frames as requested Michael. It was network. They seem to become distorted for some reason.

Thanks for posting the curves!

So the first thing I see is that various curves do not have their endpoints touching on to the curve going in the other direction.

The first spot I checked was here:


And zooming in you can see the section's endpoint does not touch the rail curve going in the other direction:


Similarly here and in most other places:



So that's a big reason why your surface wobbles around a bit instead of being planar at its end. It would be good to tighten up the accuracy of your curves before you generate surfaces.

It is possible to true up the surface afterwards too though. To do that turn on surface control points, select the last row or column of points and use Transform > Align to get them all in a straight line in a side view. Do that before trying to construct additional pieces that should join to this surface.

- Michael


- Michael

Hi Gord,

re:
> Thanks! I think I cured that gap by manipulating the surface points slightly. Nothing shows
> when Naked Edges is run. However, try as I might, I still cannot get it to mirror and boolean
> together as a solid. I planared the top face, it joined OK, but still won't boolean together for
> some reason.

There's a problem in this area:



That corresponds to this little curve fragment in your curves setup:



- Michael

Another problem is an area where this curve folds back over on top of itself:







That's going to interfere with making an offset surface, the offset surface will go crazy trying to track along a rapidly flipping surface normal like that.

- Michael

Hi Gord, some other areas that will be problematic for surface offsetting are a sudden bend in a small area here:



And the top area has a bend in it making a lip in a very small area:




That lip is probably caused by the stations meandering around some to the inside and some to the outside of the top rail rather than being right on it.

- Michael

a small gap on your last try posted in 3dm





here another way ... easy to do ... loft between curves

with cap end ... the result is solid

you can easily build a second piece and boolean diff to obtain a hull with various width

( the yellow line is a guide to align the profiles ... not necessary in the Loft command )

and as usual .. better results with profiles cleaned with Rebuild ;)

model joined ... à toutes fins utiles

@ Corchet : Les gondoles à Venise! Excellentissismo! :)

And always the tricky function MoveSliceToPoint by Michael from an existing document
where you redraw the curves! The best and easy way!
http://moi3d.com/forum/messages.php?webtag=MOI&msg=2749.36





else!

yes ;)

something easy to modify to change the general shape of the " noix de coco " ;) mixture of 2 lofts and 2 networks

1 - 4 lines to loft on each side give only 2 pieces

2 - select the 2 pieces and copy paste

3 - 4 - in the top view draw a line as closest as possible of the middle of the hull ( to prevent join problem ... it's better to do that )

4 - boolean diff to cut the half hull

5 - mirror to obtain 2 perfectly joined pieces

6 - draw a line as show on the pict

7 - before apply network to cap the hull ... join to verify it is closed curved - separate and rejoin the neccessary parts of the border - be sure to have the 3 parts ( in yellow )

8 ' select the four pieces ( 2 caps and 2 hull ) and join ... it's a solid

9 - with only small modfications of the curves in top or left axis ... it's easy to change the general shape of the boat

and possible to add other curves on Z axe to refine the shape for various borders etc ...

et qqs booleans plus tard

adding profiles for a round top
adding profiles with scales to loft the internal hull ( yellow )

Thanks guys - finally did it somehow!

That's great Gord!

- Michael

@ Corchet What a diversity of variable floating conception! :)

@ Gord Cool result!

Else...;)

Thanks! Really interesting!

G

OK, another issue on my next project. I'm doing a Clyde Puffer. I have the hull done and in solids. Yes, I know it could be fairer, but whatever, the master model can be sanded slightly, and these things had lumps everywhere!

I have 3 solids, but try as I might, I cannot get the two stern ones to boolean into the others. I tried Diff and Union, but no result. Why won't it do this. I can cut a line through the sterns, but I can't use this technique to trim off the ends to be flush for some reason. Nothing works again!

Thanks!

Gord.

Hi Gord, it's the bottom curved surface of the stern pieces. There are damaged trimming boundaries in these spots:


And there's a kind of mutated micro shelf in this area:



How did you create this piece, was it a result of a Shell operation? It kind of looks like the sort of stuff that Shell messes up on.

It's also possible that this very thin area here could be considered an area of self intersection:



It's not generally good to have opposite sides of a solid squish down to such a thin area.

If you have any earlier stages of these pieces if you can post them I might be able to tell you where things started to go wrong with them.

- Michael

Yep this serial of videos is very instructive how is made a wood boat! !
(i am on 20/73...; )

And Albert Strange a cool artist and Yacht designer!
https://en.wikipedia.org/wiki/Albert_Strange

Hull Plan of Tally Ho from another cool site : https://davestallyhomodel.blogspot.com/2019/02/the-first-steps.html



Amazing stuff!

Thanks. Yes, it was network surface then boolean joined. It's not repairable then? I know I'm doing a difficult shame again as one part has to go down to basically nothing, whilst the other upper part has to be 90 deg. to it. Not sure what to do now. It is OK on loft, but it doesn't follow the plan shape too accurately though.

Maybe you can see the videos about hulls about this site (and free prog ;)
(not so easy than moi! ;)
http://www.polycad.co.uk