I have seen Cliff's tutorials before (long time agao) and if I remember correctly, he concentrates on round hull forms and not multichine developed panels. If you were looking at multichine hulls, I'd suggest that Lofting does not always work for every type of panel you may design.
Location: Southern England Actually, used properly NURBS is EXTREMELY powerful, and it is possible to create most hull-forms from a single surface. If you start with a single surface, you should only need to split it to match keels and shaft exits, prop-tunnels etc. For developable shapes I tend to use Sweep2Rails; provided that the cross-section curve is a simple straight line and the rail curves are smooth and not radically twisted the resulting panel is usually well within 1% of being perfectly developable.
Location: Trondheim, NORWAY For a single chined hull I prefer to start with a flat surface of degree 1 in the transverse direction and degree 3 longitudinally. Location: Southern England Ok, well you can't create a non-standard knot vector (ie. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Rather than having the corner (of the rectangular mesh) at the stern, make it the lower corner of the keel, as in the Skookum53 pic attached. Upon first inspection I'd try two different sweeps, based on where I think you intended the seams to lay, but I would prefer to just edit your file myself and then if I get it to work, explain what I did. I have got a surface by using NetworkSrf, but it still gets too round down where the propeller comes out and it makes the curve go up under the stern. Location: Southern England Think of the hull as two objects, the hull itself, plus the skeg. Location: Italy (Garda Lake) and Croatia (Istria) I agree with Tim B, there is too little info about the hull shape to accurately reconstruct it.
Do you think I need to measure more bulkheads to be able "cheat" my way to something that will look pretty close to the original?
I have attached a file with the bulkheads, and a picture of a tug with a similar hull shape. I have been told that the tug used to have a draft on 2m, right now its much lighter and more on the heel. Location: australia Cph I think you need a few more sections, maybe one in the middle and around the stern (see pic).
These are only quick models based on some of the available information, so it depends on how accurate you need to be and the type of information you want out, as to how you create the surfaces.
2) Copy the master deck curve to the end of the sheer with the centerline end of the deck curve on the sheer.

Location: Kotka, Finland Designing Origami Boat in Rhino This thread is started to make clear that there is nothing mystic in designing origami boats.
At first I design a decent hull shape (I use mainly 3 x 3 point surfaces and operate with point weigths and centerline cutting to tuning the hull).
Thirdly I unroll the planks, orient them below topside plank and cut the others at the middle. Location: Australia That's cool but I have to wonder what the advantages of origami boats are in practice. I have found that the Sweep 2 command is far more accurate, though there are some interesting twists in the application.
Some work better than others, but with a little trial and error you'll find the best solution for the job in hand. Then in the front view I rotate, move and nudge the control points to match the estimated midship section, then edit the control points in top view and side view. FAILURE OF THIS HULL TO PASS STABILITY CRITERIA OR PERFORMANCE CRITERIA IS NOT THE CONCERN OF THE AUTHOR. Rhinoceros 3D is compatible with all design software, drafting, cam, engineering, analysis 5 Jul 2011 I also use Strata Design 3D CX ($699) which I find good for geometric Rhino is usually a paid piece of software available on on a PC, but as angry birds 100 save game 10 Jul 2012 Do you love concept design, character art or jus. From the images it looks like you need a bit more information before you can accurately re-build the hull shape. By manipulation of the control points by moving and adjusting the weighting of some points to massage it into the shape you want. Based on these these few lines I wanted to build a hull that was pretty close to the original. I created a surface that shape was close to the two bulkhead shapes but the mid section is not right. Generally for hulls I prefer to manipulate the surface manually rather than get the programme to fill in the blank spaces.
It seems to me that in some ways they could be as difficult to build or even more difficult, compared to just making a chine hull out of seperate panels. People do seem to be rather taken with the idea of origami boats though and I was wondering if it had any advantages over other methods of construction. Choice of method - especially for the home builder - is not just a matter of logical decisions. I have noticed that the Author is fairly insistent that hull surfaces be created by the loft command and then trimmed. Using the weighting function (which makes NURBS distinct from non-uniform B-Splines) you can produce produce chines with radius, or by introducing a singularity in the knot vector, produce a kink.

The funny thing about 3D drawing is that you have to forget about fitting sections, buttocks and waterlines, as these become a result of the geometry, not the definitiion of it. One important detail is to extend the (half) hull forward and sideways so that when you trim along the keel (x-axis) the bow profile looks good. Here are some screenshots of a simple hard-chine powerboat hull made with a single surface with two rows of control points with weighting 1000.
I like Rhinoceros 3D made by McNeel and Associates; this software is affordable, accessible Fully integrated Rhinoceros CAM plug-in. Here is a file of what I mean, I have also added dynamic section, waterline and buttock planes that can be slid back and forth to show the shape where you want it.
You could use the line drawing you have as stating point then adjust that to get closer to what you want. I did use surface from lines for the stern add on but I then manipulate that to get better shape. Their shape, dimensions and coefficients are contollable if you just check the hydrostatics before developing plates.
One may choose origami because one likes the way and feeling of bending a steel plate to itself.
He doesn't go into any explanation why this is his preferred method or why the Sweep 2 Rails command should not be used. Rhino + RhinoCAM is a powerful CAD CAM CNC software combination for design and manufacture using Rhino. With wine most of its functionality is too unstable to be useful, but if you start with any hull with the correct number of chines, rename it to default.hul, and do saving by exiting, and answering yes to the save question, it is possible to design any hullform.
Or one may choose a frame first method because one likes the rithm and symmetry of erected frames. We make powerful 3D modeling software with cutting-edge technology for product Modeling aesthetic designs with CAD software is painfully complex. Keep in mind though that the centerplane deck profile will depend in part on the master deck section.

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