topic Re: Modeling a strange shape in Modeling

Modeling a strange shape

agroni — Fri, 09 Nov 2007 14:56:33 GMT

Hello,

i am working on a competition and reached a dead point since i am not able to model a certain shape. I think that in AC11 i am not able to do it, but i heard something about archiforma???

do you think that i can manage to model the shape like in the sketch below???
i really need to model this thing

Thanx in advance 😉

Re: Modeling a strange shape

Chris Phillips — Fri, 09 Nov 2007 15:56:15 GMT

Hi

use mesh tool, make contour lines of tent shape, curve bottom edges, highlight mesh tool and magic wand contours setting z for all points on contour, make hole in top in similar way.

Chris Phillips

Re: Modeling a strange shape

Anonymous — Fri, 09 Nov 2007 18:30:01 GMT

You should use Tentmaker.

Re: Modeling a strange shape

Anonymous — Fri, 09 Nov 2007 18:35:19 GMT

This is that object.

Re: Modeling a strange shape

Anonymous — Sat, 10 Nov 2007 22:10:35 GMT

Beart wrote:
This is that object.

For an updated English version <Tentmaker 07 int>, please check the link below.
Cheers.

Re: Modeling a strange shape

Anonymous — Sun, 11 Nov 2007 12:40:37 GMT

Olivier wrote:
Beart wrote:
This is that object.
For an updated English version <Tentmaker 07 int>, please check the link below.
Cheers.

Thank you, Olivier Dentan! And desire... I’m hope, that we’ll can change the thickness in next version of Tentmaker.

Re: Modeling a strange shape

Dwight — Sun, 11 Nov 2007 23:52:06 GMT

Once again, the hero here is the complex profile wall, combined with SEO.

Making a parametric tent with approximate realism:

• Define the tent corners with a polyline.
• Define the circle center with a circle.
• Establish a larger circle encompassing all tent corners.
• Make a hypothetical tent drape using descriptive geometry and transfer it to the custom profile.
• Establish a slab as an SEO with an opening corresponding to the polyline establishing the tent corners.
• Cut upward with the slab as an SEO,
• Adjust scalloped edges to suit.

Re: Modeling a strange shape

Anonymous — Mon, 12 Nov 2007 09:41:04 GMT

If you have some Autocad skills it could be modeled quite easily with it! Then import it in AC!

Tent structures are one of the reasons I still keep an old AutoCad version on my computer!

Re: Modeling a strange shape

Rex Maximilian — Mon, 12 Nov 2007 10:49:24 GMT

I tend to use native elements unless it simply can't be done without too much effort. I think this is made for the mesh tool.

1. In 11 I would create a new worksheet. *
2. Draw the spine in profile
3. Draw 1' to 6" (depending on desired resolution) horizontal lines from the base of the spine all the way to the top to intersect with the spine profile. Then project long lines down from these points.
4. Go to the plan and turn on the trace feature and show the new worksheet. Position it above the area you wish to make it.
5. Draw the shape of the tent in plan
6. Using the offset feature, draw a polyline inside with the shape of the tent and offset it to the amount shown in the tracing where it intersects.
7. Once you have them all done, use the magic wand to create new points on the mesh.
8. Elevate the mesh points at either 1' or 6"; what ever you chose before.
9a. Use a round column in the center placed on an S.E.O. layer (that is always turned off) and subtract from the mesh's center... or... **
9b. Just draw a circular hole in the mesh the same way you made the points.
10. Set the mesh to planar.

And there you have it!

* Of course if you are in 9 or 10, then you would just draw the spine profile in the plan window. 11 enables you to keep it around in the worksheet and reference by trace whenever you need it again!
** I would probably use S.E.O. so that I could resize the hole whenever needed, and it won't compromise the original mesh shape with permanently altering it.

Re: Modeling a strange shape

Anonymous — Mon, 12 Nov 2007 12:50:12 GMT

Beart wrote:
And desire... I’m hope, that we’ll can change the thickness in next version of Tentmaker.

I did wrotte a "thickness" Tentmaker object, but it is surface only (hollow), because scripted with coons command.
Not any chance to perform as an operator for SEOs.

You can check for the "Mesh3D" object on the depository. Impressive piece of GDL,
despite some artefacts in rendering, easy to correct. This last one is solid and allows SEOs.

Re: Modeling a strange shape

Anonymous — Wed, 14 Nov 2007 08:33:26 GMT

Just in case you need to model such structures more often:

Learn basic drafting and modelling with Autocad!

An ordinary AC user can grab the basics of Autocad in days!
If you use it just for modeling, and don't have to hatch, write text, dimension or plot with it, Autocad turns out to be a very handy and friendly tool!

Model took an hour and a half to make!

I think Autocad is the best AC add-on I have!

Re: Modeling a strange shape

Anonymous — Wed, 14 Nov 2007 11:26:24 GMT

Olivier wrote:
Beart wrote:
This is that object.
For an updated English version <Tentmaker 07 int>, please check the link below.
Cheers.

Where can I finde the updated version?
Thanks

Re: Modeling a strange shape

Anonymous — Wed, 14 Nov 2007 12:18:54 GMT

Archi wrote:
Where can I finde the updated version?
Thanks

The link is in my signature. 😉

Re: Modeling a strange shape

Anonymous — Wed, 14 Nov 2007 14:53:09 GMT

Great!
Thanks

Re: Modeling a strange shape

Anonymous — Wed, 14 Nov 2007 19:36:22 GMT

Olivier wrote:
You can check for the "Mesh3D" object on the depository. Impressive piece of GDL,
despite some artefacts in rendering, easy to correct.

Indeed a GDL master piece...

But how can you correct those rendering artefacts?

Re: Modeling a strange shape

Anonymous — Thu, 15 Nov 2007 09:53:41 GMT

Braza wrote:
But how can you correct those rendering artefacts?

Attached a modified part, because i am not good for explanations.
I have added a switch parameter for sides status: Smooth/Rough.
Plus a tiny change in UI, for a correct display on Mac platform.

GDL can not handle correctly an edge between two curved surfaces (photorealistic rendering).
A workaround exists, but it seems very difficult for such a complex object.

I have tried to email the author, without success. Pity.

Re: Modeling a strange shape

Anonymous — Thu, 15 Nov 2007 10:26:32 GMT

Olivier wrote:
I have tried to email the author, without success. Pity.

I think graphisoft should hire him to improve the "Old" mesh tool...

Thank you Petri! (Ah! and of course you Olivier )

Re: Modeling a strange shape

Anonymous — Thu, 15 Nov 2007 11:08:23 GMT

Olivier wrote:
GDL can not handle correctly an edge between two curved surfaces (photorealistic rendering).

I should add : except for SEOs. Substract a portion of sphere from another one, result is correct.
Paradoxically, into a single object, you have to separate the curved surfaces by a tiny surface with a different status code.

Sorry, this turns into a GDL thread.

Re: Modeling a strange shape

agroni — Fri, 16 Nov 2007 11:45:20 GMT

Thank you very much for the help
I apologize not for answering any of your threads but i was very busy on the competition.
I used the tentmaker and i think i managed to do it. Now it has to be approved by my boss. If it gets approved, i will post it here.

thanx again
cheers