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Rubber Bands
Posted: 03 November 2022 10:22 AM   [ Ignore ]  
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Hello, I’ve been trying to follow some tutorials about creating a “rubber band” wrapping around an object effect.
However I keep running into issues.
In the file below you can see
1/With the cloth solver, despite adding many substeps and iterations, I constantly get some bouncing and tearing
2/With the collision deformed, the rubber band won’t really wrap around the object, it keeps a “distance”
https://www.dropbox.com/s/ap6qpo3kz82g0ex/RubberBand2.c4d?dl=0

What am I doing wrong?  My goal is to wrap many overlapping rubber bands on an object, so they look like they were progressively added on top of each other in a random and messy way.

Thanks!

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Posted: 03 November 2022 08:24 PM   [ Ignore ]   [ # 1 ]  
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Hi Alex,

Perhaps have a look here:
https://www.dropbox.com/s/fihgg33hwfnnq2n/CV3_2023_drs_22_MOrb_01.c4d.zip?dl=0

Screen capture
https://www.dropbox.com/s/xqmotqc6h6gwkhf/Rubberbands.mp4?dl=0

When the splines are projected, set the Spline interpolation to B-Spline, and when the bend is too “sharp” over the other Rubberband’s edges, perhaps delete a few points from the splines to make it look more stretchy.

All the best

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Dr. Sassi V. Sassmannshausen Ph.D.
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Posted: 04 November 2022 02:46 AM   [ Ignore ]   [ # 2 ]  
Total Posts:  434
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Ha!  Thanks Sassi, that’s perfect, looks exactly like what I need.
So this is a mostly manual process, do you think something similar can be achieved with cloners or with larger groups of splines?  Or will that result in messy artifacts?

Thanks again!

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Posted: 04 November 2022 10:05 AM   [ Ignore ]   [ # 3 ]  
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You’re very welcome, Alex.

I have no idea how to automate this idea from above, as each new Rubber-band (spline pair) reacts to the previous.

I tried to get it as fast as possible, with the setup copies that only two splines need to be placed as a child. So, you can make copies and projects and place them next. Of course, if you need to do this 1000 times, perhaps that needs to be explored if the first 900 can be just a sphere with displacement. And then an hour of work to get the missing 100 (perhaps a ratio of 700 to 300 might be more realistic).

Alternative
The tricky part is that it is about flat Rubber-bands; otherwise, the Simulation would allow for a quick setup.
Example
https://www.dropbox.com/s/5lugfp7fdcx5ovb/CV3_2023_drs_22_SIrb_01.c4d.zip?dl=0
Perhaps it can be stretched in one direction as a final setup to get a more “flat” Rubber-band.

BTW, Gravity is zero for this.

Cheers

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Dr. Sassi V. Sassmannshausen Ph.D.
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Posted: 05 November 2022 02:41 AM   [ Ignore ]   [ # 4 ]  
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Thanks Sassi, this is great to see.  I’m going to keep exploring based on these tactics.
Out of curiosity, was there anything special you did to keep the simulation approach smooth like this?
And why would this not work well with flat surfaces?  Not enough collision information?

Thanks!!!

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Posted: 05 November 2022 09:55 AM   [ Ignore ]   [ # 5 ]  
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Thank you very much for the feedback, Alex!

Please have a look here:
https://www.dropbox.com/s/uhka3ojozwl22vt/CV3_2023_drs_22_SIrb_11.c4d.zip?dl=0

I tend to increase polygons if something isn’t working, but more is difficult to say without a file.

Besides, I love to set the Gravity low or, in some cases, even to zero, like in post #2

Another idea is to explore the Interpolation of the spline later on.

All the best

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Posted: 06 November 2022 09:42 AM   [ Ignore ]   [ # 6 ]  
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Hello Sassi
So I was just trying the technique from your first post with my geometry, and somehow the splines are not wanting to project.  I have the file here and a screen recording here as well.

https://www.dropbox.com/s/n29059hykf86g2p/FrameProjectTest.c4d?dl=0
https://www.dropbox.com/s/f7sihrhfovk0a1v/Recording 2022-11-06 at 6.39.58 PM.mp4?dl=0

Do you see what I am doing wrong?

Thanks!

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Posted: 06 November 2022 10:24 AM   [ Ignore ]   [ # 7 ]  
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Hi Alex,

Thanks for the file.

Please have a look here:
https://www.dropbox.com/s/s9c6hdez8fj88hr/CV3_2023_drs_22_MOrb_11.c4d.zip?dl=0

When the project is set to spherical, the Spline Object axis is the center the Spline points move along, towards, or away (from it). The axis can be set anywhere before. (L key of axis Tool)

There must be enough points to reshape what the spline finds; the current State to Object is the key while having the original (Primitive) set to natural or uniform, for example, and the point amount to something higher than four)

If an object is a ring shape, like in your case, it can’t decide what part to project to, so make a copy of that object and delete the parts it should not project onto it.

All the best

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES member

Photography For C4D Artists: 200 Free Tutorials. Texture, Panorama, HDRI, Camera Projection, etc.
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Posted: 07 November 2022 01:56 AM   [ Ignore ]   [ # 8 ]  
Total Posts:  434
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Hello Sassi
Ok that makes sense.  I think that you shared an old file though?  Its the one with the stacks of rubber bands. I tried adding points to the circle before converting, and splitting my geometry, but haven’t gotten any luck yet, so hopefully your file will help clarify

Thanks!

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Posted: 07 November 2022 10:56 AM   [ Ignore ]   [ # 9 ]  
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Hi Alex,

Please look at the file here, and ensure that no other geometry is active in your file.
https://www.dropbox.com/s/s9c6hdez8fj88hr/CV3_2023_drs_22_MOrb_11.c4d.zip?dl=0
I just double-checked this one.

Let me know what isn’t working; I’m happy to look into it.

All the best

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES member

Photography For C4D Artists: 200 Free Tutorials. Texture, Panorama, HDRI, Camera Projection, etc.
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Posted: 08 November 2022 12:45 AM   [ Ignore ]   [ # 10 ]  
Total Posts:  434
Joined  2012-01-05

Hello Sassi

That worked! Thanks a lot, I’ll try to apply this technique to what I’m doing now

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Posted: 08 November 2022 11:27 AM   [ Ignore ]   [ # 11 ]  
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Thanks for the feedback, Alex!

My best wishes for the project.

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
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Posted: 24 November 2022 04:45 AM   [ Ignore ]   [ # 12 ]  
Total Posts:  434
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Hello Sassi
Happy Thanksgiving!

I wanted to ask a follow up question, as I’ve started working along the lines of your initial suggestion, which is great and it is gives quite a bit of control over placement etc.
But I’m running into a problem and as I re-watched your video, I couldn’t understand how you solved it, which is the penetration of the newly created mesh on the mesh used a projection surface.
I tried remeshing, changing the order of the splines in the loft generator, but I still get penetration.  Is the solution to use sculpting tools?  What do you recommend?
Thanks!

Image : https://www.dropbox.com/s/q1ni5dnru99pplk/2022-11-24_13h41_51.png?dl=0
Project file : https://www.dropbox.com/s/uvl1d4cbda1lh28/WrappingTailing_CV.c4d?dl=0

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Posted: 24 November 2022 03:05 PM   [ Ignore ]   [ # 13 ]  
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Thanks for the files, Alex.

The Splines were set to Bezier, which will not work correctly, as the Bezier handles will have no real clue about the projection.

I have used the Spline> Point Order to bring both more into sync. Move it up and down for one to see the effect.

To get the thickness of the Cloth usable, I switched off the Caps of the Loft and reversed the Point order of the Splines.

A little back and for with the Segment numbers of the Loft and Remesh, and things were sitting better.

I would perhaps delete some points where the profile goes inwards (edge)

Your file
https://www.dropbox.com/s/uhjozsp119m3pzm/CV3_2023_drs_22_MOrb_41.c4d.zip?dl=0

Happy Thanksgiving, and thanks for the wishes.

Cheers

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Posted: 28 November 2022 01:53 AM   [ Ignore ]   [ # 14 ]  
Total Posts:  434
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Thanks Sassi, I tried following those steps, but I’m still not getting your smooth result? Would you have time to do a short screenrecording of how you did this?

Thanks so much for your help

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Posted: 28 November 2022 10:34 AM   [ Ignore ]   [ # 15 ]  
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Hi Alex,

Can you share the last file you are not happy with, so I can see where I have to focus on for you?

All the best

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES member

Photography For C4D Artists: 200 Free Tutorials. Texture, Panorama, HDRI, Camera Projection, etc.
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