Need help for a design...

Next
 From:  Finema
7648.1 
Hi,

I need to reproduce a pattern on a vase (see the picture in attachment).
I've tried to project, flow, etc... but no way...

What is the best practice to obtain a good render

Thanks.
Image Attachments:
Size: 84.2 KB, Downloaded: 89 times, Dimensions: 314x619px
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Michael Gibson
7648.2 In reply to 7648.1 
Hi Finema - I'd probably try modeling one section and then using Transform > Array > Circular to repeat that section around to make the full shape.

To start with I'd array a line and rotate it by 1/2 turn to build the "base wedge" that you then want to build the section inside of, see attached 3DM file for a quick starting example, which looks like this:



Hope this gives you an idea for how to get started - you'd need to add more details like trimming the top of this shape from the right-side view, and then modeling a second piece rotated at a 1/2 step interval for the next section.

- Michael

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  bemfarmer
7648.3 In reply to 7648.1 
The general vase shape is a surface of revolution.

I would try subtracting the "pleats" negatives.

Can you form ONE of the long "pleats," the short pleat at the top, and the tiny pleat at the very top, to use as a cutting object?

Curve the one pleat trio slightly from top to bottom to match the curvature of the vase from top to bottom, maybe with flow.

Circular array the pleat cutting, and trim or Boolean difference, to remove part of the smooth vase.

Do you have a .3dm of one pleat trio?

- Brian
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  bemfarmer
7648.4 In reply to 7648.3 
I tried a 32 sided polygon, an arc, copy and scale, and loft.
Too late to play any more today :-)
- Brian


EDITED: 24 Oct 2015 by BEMFARMER

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Finema
7648.5 
Thank you very much Michael and Brian...
It's time to work for me !
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  bemfarmer
7648.6 In reply to 7648.5 
The vase looks like an origami folded object.
It looks like 3 cones, or frustums of cones.
Maybe it is developable.

I did a simple pleat .3dm. Basically just triangles, non-equilateral tetrahedrons.
Fillet will work on it at .2 units.

After some fillet, maybe it could be bent or flowed, then circular arrayed?


- Brian
Attachments:

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Mik (MIKULAS)
7648.7 In reply to 7648.5 
Hi Finema,

I have used Michael's surface and added the rest of volume.

It's not absolute prefect smooth, but maybe it helps you :-)



Mik

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Finema
7648.8 
HI,
I'm here (see picture in attachment) and i can't fillet it now
Image Attachments:
Size: 321.2 KB, Downloaded: 40 times, Dimensions: 653x679px
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Finema
7648.9 In reply to 7648.7 
@Mik
thanks for that
it's near i want but rounded and i don"t understand your technique...
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Michael Gibson
7648.10 In reply to 7648.8 
Hi Finema,

re:
> I'm here (see picture in attachment) and i can't fillet it now

Yes with such very sharply pointed thin needle like ends it's not likely that you will be able to fillet stuff like that, it makes it very difficult for the filleter to put in corner junctures on such super sharp pointed things and also you've got very narrow areas so there would be only a very tiny amount of space for a fillet to fit.

You may need to trim away some empty space and use blends, or it might be better to build curved surfaces from the start like in the example I posted before.

- Michael
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Finema
7648.11 In reply to 7648.10 
"or it might be better to build curved surfaces from the start like in the example I posted before."

yes it's better
Thanks Michael
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
Next
 From:  Mik (MIKULAS)
7648.12 In reply to 7648.9 
Hi Finema,

>>i don"t understand your technique...

I've used sweep...



for rounded result you can try to use two curves start/end and rails connected between ends of these curves. I used only one curve and point ended rails.



The cyan curve is tilted in right viewport - half angle between perpendicular and transversal part of vase.



...then I jointed surfaces. Resulted surface was copied and scaled (0.99). I've created the solid via jointing lofted surface between outer and inner rim of surfaces and outer and inner basic surface of vase.

Hope this helps.

Mik

  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged

Previous
 From:  Finema
7648.13 In reply to 7648.12 
Thanks a lot Mik !
  Reply Reply More Options
Post Options
Reply as PM Reply as PM
Print Print
Mark as unread Mark as unread
Relationship Relationship
IP Logged
 

Reply to All Reply to All