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danielkaiser
07-24-2010, 09:49 PM
Is it possible and how would you go about creating a truly single surface figure 8 type Mobius Strip? and then having a camera and objects follow a path around the strip?

Hopper
07-24-2010, 11:33 PM
Using the Box tool, create a flat (2D), long, and narrow box with many segments lengthwise (like a sidewalk). Then use the Twist tool and twist 180 degrees along the long edge. Then use the Bend tool and bend the shape at 360 degrees and merge points.

To make the figure 8, simply duplicate, break them apart, use splines to patch it.
Note: It's getting late, so I just did the easy part just to get it started.

EDIT: select all polys -> Surface Editor -> Double Sided

Here are some quick and dirty screen shots:
===========================================

Step 1 - Create a 2D box with many segments.
http://comdotslashnet.com/images/moebius1.jpg

Step 2 - Twist 180 degrees along the long edge.
http://comdotslashnet.com/images/moebius2.jpg

Step 3 - Bend 360 degrees, then merge points and make double sided polys. (Bend in "Back" view).
http://comdotslashnet.com/images/moebius3.jpg

Hope this helps.

probiner
07-25-2010, 12:15 AM
aahh Hopper beat me to it.
I did exaclty what hopper did to get the shape. But instead of double sided i duplicated the actual geometry so that you can have a UV map going all the way along the strip. I gave it some thickness too so that those 2 sides were notorious.

As for the Camera following the surface i guess you can make a Cut right in the middle of the strip in modeler and export it to Motion Path and Offset it in Layout, but i have no idea how to get a good Pole Vector for the Bank.

Cheers

http://i153.photobucket.com/albums/s202/animatics/Lightwave/strip_image.png

Hopper
07-25-2010, 12:18 AM
ooooh .. pretty probiner! Much cleaner than mine...

I did the "8" .. but by hand so it's pretty sloppy. Normally you would simply spline patch them together.

--And as for the camera. Couldn't you just use Sticky and a null object, then parent the camera?

Oh, and be careful about "when" you give your geometry thickness. When you twist and bend, it will distort and become thinner in places.

http://comdotslashnet.com/images/moebius4.jpg

Enjoy.

TripD
07-25-2010, 03:16 AM
Awesome techniques. You could also plug in the formula right into the parametric object tool in modeler. You can make a pure mobius or an infinite variety of tweaks by manually changing the inputs. Only trouble is that the end almost always needs cleaning up. I inclosed the parameters to try. By changing the Vmin and Vmax you can get wilder varieties of mobiuses... mobiusi... errrr yah.

probiner
07-25-2010, 06:48 AM
Trip D i opened your txt and got :eek: (how the heck am i going to apply this?). Anyway, always nice to have the precise expression, thanks.

Gave it a shot on the 8 too but shape is sucky. Basicly i used the array of the orange box nulls to bake motion and export motion path to modeler. I did the Bank manually since it canb e kind of predictable.
Cheers

http://i153.photobucket.com/albums/s202/animatics/Lightwave/Mobius-8.gif

Hopper
07-25-2010, 09:23 AM
Looks like you made a pretty cool new avatar there.. :)

TripD
07-25-2010, 01:06 PM
@Probiner

Modeler: Creative Elements/Primitives/More Primitives/Parametricobj

Then just plug in the numbers.

edit: Copy and Paste are your friend. :)

probiner
07-25-2010, 11:35 PM
Ah i see TripD, but after i put the numbers, nothing happens, i just get 1600 vertices at the origin =S

Cheers

TripD
07-26-2010, 03:23 PM
Hmm.... well, I got it to work via copy/paste. Just gotta be sure the equation uses Lightwave math symbols. I made a picture... hopefully it is worth more than my words.

You will see that the last band needs to be deleted and patched up. But by tweaking the right things you can get pretty wild stuff. In this case Vmin and Vmax.

Also, modeler will remember your inputs during the whole session.

bobakabob
07-28-2010, 03:55 PM
Great project, and you seem to be having lots of success with the motion. I had a go at doing something similar a while back, though for some reason the object following the spline got 'confused' at 2 points along the strip and I had to keyframe it back in place which wasn't easy. The spline was originally straight along with the track and I used the same techniques to create the strip.

Love the figure of 8 moebius strip, especially when the planes cross. Looking forward to see how this pans out in finished renders.

http://www.johnnyrem.com/moebius_highway.htm

Hopper
07-28-2010, 04:05 PM
Here's a pic (hope you don't think I'm hijacking the thread!)
That's funny... As soon as I saw the original post of "Mobius Strip", I thought of your animation. (Probably because he's got a Telecaster strapped to his back).