Hi Michael,

Many thanks for your continued efforts with this. I've decided to go with my networked hull for this model. It has a hollow which I didn't notice before which is bothering me now but much additional work has been done on it (plate extrusions etc) which I've decided I don't have time to redo.

This has been a very worthwhile exercise with some water still to flow under the bridge (ship?). I have another one to do which I will attempt with a loft and trim mindset from the beginning.

Jean-Paul, I eagerly await your thoughts on this. I have already referred to several of your threads for ideas.

>In my experience, it is better to work with longitudinal curves
>(waterlines) than with vertical sections (stations) and to use
>only as few as absolutely needed to generate the shape you
>want.

Unfortunately, longitudinal curves are almost never given in the plans I have so I have had to work from stations.

I couldn't resist attaching latest progress render and a two minute scene render (with some odd coloured water!).

Cheers

Hi Mark, well your current renders there are looking great!

- Michael

I wanted to fool around with this a bit. I talked to a guy who told me that using the waterlines as opposed to the stations is how they build hulls. The stations are more a way to get your waterlines. So I took your loose loft of the stations that created your shape fairly close to what you want, then I created a direction array of a few lines out to the side and projected them onto the side of the loft. Then I ran rebuild curve on those new waterlines and used about 20 points to get curves with no deviation. I then lofted with "normal" the waterlines and got a good points structure that could be manipulated a bit easier to adjust areas. I could do this while the loft was still active in history and just use the points from the input curves.

I think I could go back to Station manipulation by reversing the process, but it is much harder to manipulate the overall shape by stations.




Any further input from you Mark, and JP is appreciated.

Hi Burr,

Wow, that looks great. Thanks so much for following this through. I wonder if that is the technique that Jean-Paul uses?

I need to have a go at this today. I think I understand the technique and will get back to you with results. I really hope I can duplicate what you have done there as this is looking like the method for hull generation.

What a great forum this is. Thanks again Burr :)

Mark

There is a tutorial in the Rhino website from the guy that did the Boat that is on their main page. He has a model that you can download to look at his tutorial, and in his model this is what he did.

I revisited it after I posted and the waterline curves, rebuilt at 20 points, actually do deviate a hair from the original curve. Really only at the bow and stern. More points just means harder to work with, but this does give a different angle to adjust the shape in some areas. It may be small enough to still work it this way.

Good luck.