In creating a surface with slight curve looking from front and right view,
what would be a good approach?
Hi Toshiaki - is the perimeter curve planar?
edit (Answer: Yes, read the subjectā¦)
-Pascal
yes the perimeter is planar.
Iāll check out the link. Thanksļ¼
Hi Pascal,
Canāt seem to get the edges of the surface produced by patch to
meet up with the original perimeter curveā¦
Sorry not to mention in beginning, I also wanted the edge of the
created surface to be planar.
patch.3dm (153.7 KB)
Hi Toshiaki - Well, yours is pooched up rather more than my example. I guess the idea is to have the surface planar enough to Cap on the bottom side, right?
Iād still be tempted to use Patch with a starting surface here with the straight edges and sharp corners, but a loose loft can also make this kind of shape, it just does not lend itself to this hard āarcs and straightsā shape all that well. Iāll see if I can cook up an example.
I guess, if I understand the shape you want Iād patch the curves with a good number of spans - 30 or 40 each way. Then untrim the result (or donāt ask for automatic trim in Patch) and then trim/split the result with a level line or plane. The result will have a planar perimeter and should come pretty close to the original perimeter.
-Pascal
Hello,
Perhaps I donāt understand the question, but here is the result using your lines joined in a particular way and Network Surface. The outside edges are planar and will cap into a solid.
Hi Pascal,
Iāll try to bump up the UV to see how it goes.
Thanks for the tip!
Make sure the distance between the points which Parch generates for fitting the surface are closer together than the distance between control points on the surface. Something like 3 or more patch points per control point spacing would be good.
Also, the Stiffness in Patch can have a significant effect. Experiment with different values. For this you may want a value of 100 or so.
Hi OSTexo
Iām trying to get a all around soft curved surface.
Basically what patch is doing is great, but also want the edges to be able to be capped.
sort of railrevolve with two guiding curves I guessā¦
Actually your Networksrf looks nice. Can you teach me the steps?
I couldnāt get it to go smoothly all aroundā¦
Using networksrf I end up with something not smooth or get a flattened corner¬ smooth.
Thanks! Iāll check out the stiffness.
I only changed them when adjust tangency is set on.
Hello,
Please see attached images. I joined the curves indicated by the common colors, selected all curves and ran the network surface command. The last image is what I was left with. I see your point about the surface flattening at the rounded corners, Iām wondering if additional guide lines or different positioning of those guide curves would improve that even more. Iāll do some more testing over the next few days to see if I can come up with something.
OSTexo,
Thanks for the explanation. Iāll try it out!
At first I was hoping this kind of surface was a bit more easier to make and a common oneā¦like surface on buttons, smartphone back, soap dishes, etcā¦
Trying out railrevolve then adjusting pointsā¦
seems ok here, but canāt control muchā¦
(and more flattened version for nowā¦)
railrevolve_then_adjustingpts.3dm (125.1 KB)
ehā¦ curve with more height railrevolve doesnāt seem to work too well.
If you can help out againā¦
Iām still trying to work on the soft round surfaceā¦
I guess Iām aiming for front of macbook, so a smooth surface all around that joins with a hardedge.
I guess samsung galaxy backside maybe(I donāt own it thoughā¦)
Trying different ways to make it, but I canāt get the corner right.
Closest I came so far is using a using sweep2 in the end. But still I get some bumpsā¦
Others are a messā¦
For the patchā¦ Iām seem to not be handling it wellā¦ I also face problem closing up the surface tooā¦
Round_soft_surfaec.3dm (1.0 MB)
Hi Toshiaki - Iād built is something like this, not a surface but several, (I did not understand that from your original post).
Round_soft_surfaec_PG.3dm (98.4 KB)
Updated the fileā¦ I noticed I had not made the outer edges tangent to the vertical edges like the curves are.
BTW, looking at your base shape - I notice that the corner has a slight flattening of the curvature in the middle - Iād say to maintain really nice visually smoothly-progressing lines, there should only be one acceleration in curvature with maximum curvature in the middle, rather than two max curvatures - a small difference but it looks cleaner when reflections and light fall on it.
-Pascal
Thank you pascal.
Yes, when I was writing my original post I didnāt have a clear way of explaining what I wantedā¦
The explanation of the curvature really helps.
Getting more understanding of curvature of curves and how it affects the outputted surface
with different tools seems to be my next steps.
hi Pascal,
For the doc which you attached, just to double check,
could you explain the process order?
Is it,
- sweeping the curve to get a big surface,
- Trim to make the round edge in the surface
- split edges so there would be three edges both in the surface side and frame
- blendsrf straight edges x 2 (wasnāt sure since your surface here looked very simple)
- and last do a sweep2 in the corner?
Similar question of making a soft round surfaceā¦ but with the frame being like a kidney shape.
Having trouble making the first large surface to work fromā¦
I tried a sweep all around by using a short split reference curve,
but of course I get overlapā¦
tried couple of other ways but couldnāt figure it outā¦
Soft_Round_Surface_edgesgoingin.3dm (161.2 KB)
Hi Toshiaki - for this new shape, Iād be inclined to use the āloose loftā technique - see the attached file - if that is more or less what you have in mind, Iāll describe the process. Tomorrowā¦
Soft_Round_Surface_edgesgoingin_PG.3dm (207.9 KB)
-Pascal
Hello,
Iām not sure that surface is as simple as it seems to be, particularly if your aim is an Apple like surface. I was able to get something that looked decent with a decent higher continuity, but Iām curious to see if I could actually build out a much larger surface and do some specific point editing to model that very gradual surface you seem to be looking for. Iāll think about it some more and let you know what I come up with anything that is a possibility.
Thank you for the file pascal.
I didnāt know loft can be used this clean starting from the point.
Trying it out.
Trying_Soft_round_surface.3dm (218.9 KB)