Use Rhino to create surface between stations?

[ivansalasj]

Hi,

I am just starting to export my designs to rhino since i was told to try the program out. I hace a yacht hull form defined by 26 stations, is it possible to create an accurate surface in rhino to define this hull form as accurate as possible?
Thanks for your help.
Ivan

[CGN]

Yes you can use rhino for what you want to do, there is many posts around here, maybe you can do some search here and follow some of this posts that covers hull modeling for rhino,

You can create a surface trough the stations that you have already but there is some work to be done in order to obtain a nice and fair hull, and i have to say that, do not expect to have a 100% of accuracy from what you have now.

But it will be close, and if well done, it will be amazing close to what you have.

good luck

[ivansalasj]

Thanks for your reply, i have been looking through the forum and haven't found any specific answer for creating a surface thorugh stations using rhino, but i am glad to know that it can be done. No i am not expecting 100% accuracy, but enough to be able to get hydrostatics and use a simulation program.
Thanks again
Ivan

[CGN]

Have a look at this webpage:

http://www.tjhsst.edu/~kdomina/Cad04/tjohnsto/Index.htm

See the attached tutorial

good luck

[lutor]

Hey,
obviously if you want to rebuilt wirh a surface a lines plan that you have, and the original lines plan give u 26 station ok you can buid the surface with 26 station with rhinoceros.
But if you are looking for a fair hull, starting from zero, the best is to work with less master curves, as the more the master curves, the more the fairing problem you will have during the hull design and final fairing.
Every designers have his own mthods, but since now, 26 station to fair a hull is too much.
Another problem will be that, in the case you have digitalized a lines plan from paper, now you have several sections of the hull, but every section contain some error dued to the digitalization. So if it is the case (may be, don't understand) I suggest you to use only maximum 10 section to draw your surface with Rhino...and you have to choose the most important section in the bodyplan.

[JEM]

If your stations are outlined as one continous line, you can do it. Here's how:

Click "Surface" and "Loft": Then click each station in order. Make sure that you click each station in the same location. In other words, if you click on the upper left edge of station #1, click the upper left of station #2, (excuse my lack of nautical terms).

Then in the loft options box that will pop up, select "Loose" in the drop down box.

What that does is Rhino will follow your stations but will automatically adjust to create a fair surface. So if you analyse things closely (and you have your grid display set to the highest resolution), you can see where the surface deviates from some of the stations.

Hope that helps. E-mail me if you need a better explaination.

26 stations is overkill. I'm guessing you got them from framing locations or something. Rhino will take the best average of those stations, but you may want to consider dropping at least every-other stations to make things easier.


Matt

[Tim B]

I would use no more than 10 or 12 stations to define a hull, prior to fairing in Rhino. Look under the surfaces menu, and use "make surface from point grid". Be warned that you must be consistant with the order you select the points, it will work (assuming all the stations have the same number of points) you'll just have to play with it. That gives you the basic surface. Now fair the surface (make use of the curvature displays under "Analysis --> Surface") then check the deviation of the new surface using 'Deviation from point grid' also under "Analysis --> Surface". If you are starting to design a hull from scratch, though, it is preferable to build the whole hull from a single NURBS surface in the first place and use control points to copy hull geometry. If your surface was origenally a B-Spline make the Degree of the NURBS Surface 1 less than the number of control points in that direction.

Hope that helps,

Tim B.

[Skywalker]

Looks like this is a popular software for hull fairing. Can you tell me more about this application and the product manufacturer's home page ? I use AutoCAD 2002 and fair hull visually (not good !), using splines. Need a better way to do this ! Thanks in advance.

[JEM]

http://www.rhino3d.com/

There's a demo version. I highly recommend doing the free tutorials. If you can use AutoCAD, using Rhino is very intuitive.

[Raggi_Thor]

I use Rhino but aslo Naval Designer in the early stages, www.navaldesigner.com