I need your help please, I was trying to create a solid shape from the curves in the attached file using Sweep 2 and loft, but I didn’t achieve the desired result. I am sure I was doing something wrong, but I couldn’t figure it out. So, I changed the approach, and I applied sweep 2 on the main shape. Then, I offset the bottom profile to ensure a straight and clean cut when applying Boolean difference. However, the outcome is not accurate.
I would appreciate your guidance on how to achieve an accurate solid out of the curves in the file attached.
Actually, what I am looking for is how to create a soild shape from the main curves using Sweep 2 or loft (as in the attachment). Because the outcome of the option I did in the Rhino file was inaccurate.
Thank you so much.
The first thing to do is to re-draw your curves - they are way too complicated for shapes this simple and also there are some nasty G0 transitions in the bottom curve. Also, since the object is symmetrical, I just did half the shape - at least the blend-part. This isn’t always possible/an advantage, but in this case, it just seems easier.
Other than that, I start out using the same methodology as @Tom_P, but in order to get the lower edge to match the curve exactly, I cut off a strip at the bottom and use sweep2 to match to the bottom curve.
Notice that I start by sweeping using (part of) the original curves and then use matchsrf to bump it up to curvature. This prevents the isocurves from getting too out of place. I’m sure some of the Class-A guys could do it better, but at least it’s a place to start Shape 01_JN.3dm (3.2 MB)
Wow, this is amazing @Normand Jakob , I like the method you used, actually I tried before the half shape, but it never occured to my mind the way you did it, this is a Class-A
Thank you very much Jakob for the detailed instructions and for providing the video steps. It’s incredibly helpful, and this is exactly what I was looking for , I will follow your advice and redraw the curves to make sure that they are clean.
And thank you once more for your time and for teaching me new things, I really appreciate it
and many thanks @Tom_P for your help and input!
, I like the method you used, actually I tried before the half shape, but it never occured to my mind the way you did it, this is a Class-A 
, I will follow your advice and redraw the curves to make sure that they are clean.