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Wrapping tepee cover - Printable Version

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Wrapping tepee cover - Willy Tschager - 2016-11-11

Guys,

as you might know I'm slowly authoring all the missing Western parts from the late nineties, which are missing in the library. Sooner or later the "last part standing" will be "Cloth Tepee Cover with ... Pattern":

[Image: x172px1.png]

http://www.bricklink.com/v2/catalog/catalogitem.page?P=x172px1&idColor=1#T=C&C=1

It will be fairly easy designing a flat version in LDPC, but how do wrap the cloth? Any ideas? How about a wrapper prog for this kind of job?

w.


RE: Wrapping tepee cover - Philippe Hurbain - 2016-11-11

Hopefully this should be usable: http://forums.ldraw.org/thread-16349-post-16349.html#pid16349


RE: Wrapping tepee cover - Willy Tschager - 2016-11-11

(2016-11-11, 19:28)Philippe Hurbain Wrote: Hopefully this should be usable: http://forums.ldraw.org/thread-16349-post-16349.html#pid16349

As I understand it is for slightly curved surfaces, but the tepee would project on a some sort of cone, offset from the top has to be adjusted, overlap must be allowed 'cos the tepee would wrap and the ends would overlap.

w.


RE: Wrapping tepee cover - Philippe Hurbain - 2016-11-12

(2016-11-11, 20:28)Willy Tschager Wrote:
(2016-11-11, 19:28)Philippe Hurbain Wrote: Hopefully this should be usable: http://forums.ldraw.org/thread-16349-post-16349.html#pid16349

As I understand it is for slightly curved surfaces, but the tepee would project on a some sort of cone, offset from the top has to be adjusted, overlap must be allowed 'cos the tepee would wrap and the ends would overlap.

w.
I guess a ldpc template can be done using Meshmixer unwrap tool https://youtu.be/PCgP8VLFaz4?t=3m11s . I'll give it a try!


RE: Wrapping tepee cover - Magnus Forsberg - 2016-11-12

[attachment=2582]

It looks like the tent needs to have an octagonal base. I can't get a single cone to fit the brick base and the ball-pins.


RE: Wrapping tepee cover - Philippe Hurbain - 2016-11-12

(2016-11-12, 13:30)Magnus Forsberg Wrote: It looks like the tent needs to have an octagonal base. I can't get a single cone to fit the brick base and the ball-pins.

I am indeed facing the same problem... I guess that IRL it works with flexibility of the fabric. Willy, any suggestion?


RE: Wrapping tepee cover - Philippe Hurbain - 2016-11-12

Aside from problems mentionned by Magnus, I tried to create a template for LDPC. Good and not so good news...
I was able to create a cone template using the following method:
- Create the cone in LDraw.
- convert it to stl with LDView.
- import the cone in Meshmixer
- Create the flat template with Meshmixer unwrap tool
- export the flat template to stl and convert it to LDraw domain with stl2dat
- Import that file in LDPC and make a template.
- Replace flat projection data of the LDPC template with 3D values from the initial cone.

Now the problems...
- you have to take care of the order of polygons, and of the order of vertices of each polygon, and the long travel between tools tends to mess up things.
- LDPC projection precision looks fairly limited, and resulting pattern has small gaps.

Attached the files. As the process is fairly manual, I limited myself to 7 segments of cones...

Template file: [attachment=2585]
example LPC project: [attachment=2584]
result: [attachment=2586]
"raw" cone to see difference between "ideal" shape and somewhat off projected result: [attachment=2587]


RE: Wrapping tepee cover - Willy Tschager - 2016-11-12

(2016-11-12, 13:52)Philippe Hurbain Wrote:
(2016-11-12, 13:30)Magnus Forsberg Wrote: It looks like the tent needs to have an octagonal base. I can't get a single cone to fit the brick base and the ball-pins.

I am indeed facing the same problem... I guess that IRL it works with flexibility of the fabric. Willy, any suggestion?

The fabric is not stressed in no point and wraps around quiet loosely. Here are some pics:

https://www.dropbox.com/s/apqtky13762sbwu/Tepee1.jpg?dl=0

https://www.dropbox.com/s/6xl7yo05ayzp7yr/Tepee2.jpg?dl=0

https://www.dropbox.com/s/jayz3frjf6gmvjk/Tepee3.jpg?dl=0

w.


RE: Wrapping tepee cover - Philippe Hurbain - 2016-11-13

Results so far for basic shape (without holes). Comments?


RE: Wrapping tepee cover - Willy Tschager - 2016-11-14

(2016-11-13, 21:34)Philippe Hurbain Wrote: Results so far for basic shape (without holes). Comments?

Awsome! Looks really good. Get out the driller and let's make some some holes :-)

w.