This episode deals with "y" blends! They can be tricky to truly do right - this is my approach. The link to theoretical edges is here: tinyurl.com/y5... This is not an easy one and took me a long time to prepare, hope you enjoy!
Thank you so much for your time in explaining these steps so well. Your pacing and demeaner when teaching is superb and appreciated. I've watched a lot of these kinds of videos and being able to sit, follow and retain so much info for even over 30 mins says a lot about your process in teaching.. Thanks again
Great tutorial! I mostly appreciate that you let us see that even masters at your level have to sometimes struggle so much when modeling. In most tutorials, out there, everything is smooth and easy when done by the teacher. thanks for sharing that it's not always the case.
This is so much more complex than it should be. Tedious, pain in the ass. Surely there must be a simpler way. That being said, thanks for taking the time to get these out there.
@@thirtysixverts I watched it and it is a help but this whole process is very frustrating when you're trying to be creative. Are there any other alternatives to Rhino at a similar budget?
@@seankelly5318 there's really no other alternative at this price point for NURBS modeling. What many people do - and you might want to look into because I fully hear you on the creativity side - is do your conceptual modeling in something like Blender using subdivision modeling. NURBS are, regardless of program, the hardest and most time consuming way to explore concept when compared to other modeling approaches.
@@thirtysixverts Thanks for the reply, I will give that a go. The funny thing is I found a simple clay model actually can be the best thing to get my head around 3d surfaces. I will continue to plug away at Rhino.
Gold- Did not know that Tab extended the line. Did not know to symmetrically adjust blend curves with Shift. This should be the Level 2 technique for Y Blends- instead of what Rhino documentation teaches. This is so much more clean and nuanced!
I'm very new to nurbs and Rhino (Actually, I'm learning by means of your videos) but while following you tutorial I never had so many problems as you had with the tangency of an edge being destroyed when adjusting the other edges. I sorted it out by simply using the PRESERVE options on the MatchSrf dialog, which I see you never used. Thanks for your videos. I'm learning a lot. Many years with polygonal modeling but I'm discovering nurbs now.
Note: Of course I haven't been able to reach values even close to those of yours; what I mean is that it went much more worse when I didn't check these options when matching opposing edges and by checking them I didn't have so many troubles as you had. I'm using Rhino 7 and its new "Edge continuity" analysis feature to test the results. I haven't been able to lower the value of the tangency bellow 0.14 just in the point where all these 5 edges meet and my zebra lines get spoiled just there.
@@dbogucki Well, I mean, when he decides to stop matching multiple surfaces and starts matching one at the time. When I did it I had to do only one or two tries in order to achieve a good matching; but I did select the options to preserve the opposite edges when I did it. By the way, I have stopped learning NURBs (only temporarily, I hope). Thanks for the feedback, though.
Honestly one of the trickiest things in NURBS modeling. I for sure use the "cheaters" method I describe at the end - MUCH faster, more predictable process.
hey i was wondering if you could do a tutorial on the front part of a 2020 acura nsx there is an "E" shape on the front lower left/right of the bumper that i have been trying to figure out how to model to add to a shoe design and i can not for the life of me figure out where to begin and how to accomplish this. If not can you point me in the right direction on how to do so? Thanks and love your videos!
Thanks for this but I have some question to insertknots.Doesn't it better to up the degree with control points? If using insertknots, it can't be singlespan srf.
Hi! Thank you for demonstrating that with Rhino is possible to get clean surfaces with a quality result. But could you do the same exercise with vsr matching tool? My feel is that is more tricky to use but more accurate. Another issue, is it not more appropriate instead of inserting spans in the 2 small patches, detach them in a smaller pieces locally? Saludos amigo!
Hello ! thanks for this deep explanation how to fit a set of surfaces that gives a nice result ; I am using rhinoceros for many years and still struggling with the transition surfaces to master G2 continuity, I think VSR tool is advantageous and helpful for this situation, so why does not it integrated in Rhino 7?
How different between Rhino and Alias in term of automotive body design? Now I just bought upgrade Rhino to Rhino7. I am looking too the price Alias now subscribe license. It still almost 5 times cost. If alias better and faster I would change to it.
At 30:28 (duplicating the two parts of the S-curve and joining) I get a Polycurve as a result, and later a polysurface (yuck!). I confirmed that S-curve is nicely G2 continuous. The S is slightly more pronounced in my case, but I don't think that should cause the difference. What could be the cause of my problem?
This is actually correct, so long as you have setup everything correctly. If you follow along to 32:00, you'll see I split the surface into two by Isocurve and shrink them. The result is two correctly built single span surfaces that are ready for matching to final shape/continuity. So long as after splitting the surfaces you get two single span surfaces, of the appropriate degree and point count, you are doing it right.
@@thirtysixverts Thank you for your quick response! Can't believe I missed that! All is well now. I'd like to suggest an idea for a future video. After following your primary surfacing series, I feel pretty confident at making the general shapes I want to make. However, filleting is still a bit of an issue in complex situations (multiple fillets meeting each other). The "Complex Surface Transitions Thread" video has been the most helpful in this regard, but it's still not working out right. My current workflow is: make an object with hard edges, then use Pipe, BlendCrv and EdgeSurface to fillet. This feels very laborious. So, if you deem it interesting enough, I'd like to see a video on basic filleting workflow. 🙌
Awesome content. best i've found so far. got a couple of questions. what do you think about this statement "it is ok to end up with 1+ span surfaces if they are final and won't need any further editing" ?? also do you know why McNeel removed the simple sweep option in 2RailSweep in V6 ?
Thanks!! As for your questions - I'm a HUGE fan of what I call "near single span" or jokingly "single span adjacent" surfaces - which is to say I often end up with a degree 5 surface with 7 points instead of 6. These can be hugely helpful in terms of hitting a certain continuity target, or just in having a little more control. No clue why they removed that option - I'd say use Surface From Edge Curves instead, and then MatchSrf, that way you can control the point count and degree of the surface you make.
@@thirtysixverts Awesome. Thank you so much. Just eye-balling the results from SurfaceFromEdge and Simple Sweep they look fairly similar; so may be that's why they removed it, but can not say for sure if mathematically they are under the hood.
@@FadyMegally The two commands produce slightly different results, even when Sweep is used in Simple mode but in a certain sense the point is moot - the workflow I'm trying to show with this series is one in which you create base surfaces that are the correct point count/degree/point spacing in order to achieve your desired result, and then you simply use Match and/or point editing to achieve your desired result. Once you get comfortable working this way, you'll find it will seem a little odd when people obsess over which method they used to create a surface in the beginning.
Hey, great tut again! Your video reminded me of a couple others on the same topic: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AEWdtlm5mvw.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-d8cEXL56_sk.html I've tried both and they kind of work in Rhino, but you'll probably have to spend the best part of an afternoon, while risking your sanity in the process. Nevertheless it's always nice to see what solutions other people can come up with. That first one bears some resemblance to your method too. The second one is just WILD, but he seems to use that same method in many other cases, where two fillets merge into each other.
That second one....I dunno man......That first one tho! That was absolutely a big inspiration for this video. I'm even more proud of the "cheaters blend" I put at the end of the video tho - honestly whenever you can get away with that trick, do it!
