Shaping a cylinder - interesting technique

jeff hammond

the thing that's really interesting to me is another one of his videos.. i can replicate it but i really don't understand why this is possible..

http://www.youtube.com/watch?v=LZKO8sT0-U4&feature=related

parts of the shape look like things i do in my work but this technique appears uncontrollable.. does anybody know what's going on here?

[edit] -- more specifically, i'm talking about what happens at 25 seconds into the video.. the 'wiggling' of the rotate tool on the selected hidden lines... it causes the ends of the shape to puff up.

whatthe.skp

xrok1

ha, looks like a glitch. i can hear the gears turning, it wouldn't surprise me if someone can pervert this into a bend ruby.

ton baeten

The unexpected depts of SketchUp!
This 'feature' has always been there, but hardly anyone ever payed any attention to it....untill now.
It's fun, interesting and intriguing at the same time.
I have been playing with it for hours and created unexpected shapes and forms within minutes.
It took me some time to really 'get' the tricks shown in all of KitoRaub's videos, I replayed them a couple of times, but in fact the trick is just adding a coherent, simple, sticking, visible geometry to a 3d shape and manipulating just that geometry with standard SU functions. No rubies needed, just simple SU.
The videos show a bit of perpendicular rotation and scaling of the selection, but I have already found out it is not limited to these. More basic SU functionality can be used and combinations result in very unexpected free formed shapes.
The only thing now is to learn how to control the results of a deformation: what happens and why?
Try and error will be the road to go, but I have already found a new and easy way to create some shapes which took me qiute a hard time, untill now.
Thanks Watkins for your finding.

Teezer

New toy! Yummy...

Ecuadorian

[recovers from shock]
[picks up jaw from the floor]
[rushes to give 5 stars to all of Kito's SU videos and subscribe to his channel]

thomthom

That method with selecting a line along the length of a segmented tube, using the protractor to bend it... what on earth is going on here? I don't understand. I see it working, but I don't understand. Though, somewhat unpredictable, it's very cool.

pilou

@unknownuser said:

what on earth is going on here? I don't understand. I see it working, but I don't understand

Maybe like this?
As the spiral line is inside each little "squares" (hidden geometry) and these are "unbreakable" all must follow!

jeff hammond

pilou, thomas is talking about a separate techinique

watch this and please tell me what is happening.
http://homepage.mac.com/jeffhammond/.Public/scf/Qtool.mov

.

kwistenbiebel

Could this technique be made into a ruby?
Following what I see in the youtube (using the auxiliary spiral), this could be done, right?

A ruby that would model the spiral for you and make the scaling behave as described in this thread would be wonderful.

thomthom

@kwistenbiebel said:

Could this technique be made into a ruby?
Following what I see in the youtube (using the auxiliary spiral), this could be done, right?

A ruby that would model the spiral for you and make the scaling behave as described in this thread would be wonderful.

Harnessing it into something more controllable... hmmm..

pilou

@unknownuser said:

watch this and please tell me what is happening.

Maybe this little image can explicit that
No magic inside, it's totally normal! (click image if scrollbars)

It's like escarpolette (seesaw) Ground don't move!

Ecuadorian

Just stick to the standard 640x480 size and you'll get no scrollbars.

xrok1

pilou, it works with no bottom as well! you may have something with the triangle thought but it would be the triangle nearest to the selected edges that would be effecting the shape not the ones on the opposite flat side.