Designing simple organic shapes

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kefir
Posts: 27
Joined: Wed Jul 23, 2014 9:03 pm

Designing simple organic shapes

Postby kefir » Sat Apr 28, 2018 11:27 am

Hi,

I'd like to learn if it's possible to use freecad for simple (or complex) organic shapes. For example, something like this:

Image

Where would I start to do design something like this in freecad? I'm talking about the basic "organic" shape of this lure's body, not the hooks and eye screws.
dbecad
Posts: 80
Joined: Fri Mar 16, 2018 11:10 pm

Re: Designing simple organic shapes

Postby dbecad » Sat Apr 28, 2018 2:02 pm

Good day Kefir,
you should have a look at the video on how to model a hook (kind of appropriate :D ) by Christoph here:
https://forum.freecadweb.org/viewtopic. ... 2&start=10
It's more of an organic shape than a hook, you will have to use sweeps and lofts, body first then add the eyes (maybe separate body)
Cheers
chrisb
Posts: 25204
Joined: Tue Mar 17, 2015 9:14 am

Re: Designing simple organic shapes

Postby chrisb » Sat Apr 28, 2018 2:55 pm

The product design tutorials may give you an idea of the possibilities. The bottles might be interesting.
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NormandC
Posts: 18534
Joined: Sat Feb 06, 2010 9:52 pm
Location: Québec, Canada

Re: Designing simple organic shapes

Postby NormandC » Sat Apr 28, 2018 6:20 pm

kefir wrote:
Sat Apr 28, 2018 11:27 am
simple (or complex) organic shapes.
Organic shapes are actually hard to model in CAD. FreeCAD is more geared toward mechanical design, although its underlying geometric modeling kernel supports it, the required advanced surface tools are not all fully exposed yet in the GUI. That being said you may be able to do what you need with the mentioned approaches.

It's much easier to model organic shapes in polygon modeling.
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bejant
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Joined: Thu Jul 11, 2013 3:06 pm

Re: Designing simple organic shapes

Postby bejant » Mon Apr 30, 2018 1:42 am

kefir wrote:
Sat Apr 28, 2018 11:27 am
Where would I start to do design something like this in freecad? I'm talking about the basic "organic" shape of this lure's body, not the hooks and eye screws.
Hi, still pretty much the same as when you asked back in 2014:
https://forum.freecadweb.org/viewtopic.php?f=3&t=7131

This time your model will be a lot simpler...
kefir
Posts: 27
Joined: Wed Jul 23, 2014 9:03 pm

Re: Designing simple organic shapes

Postby kefir » Mon Apr 30, 2018 9:26 am

Wow, I literally asked the same question 4 years ago. The internet has a better memory than me. I guess it's time to look more into mesh design for stuff like this, as long as nurbs or something like that isn't really an option.
ulrich1a
Posts: 1946
Joined: Sun Jul 07, 2013 12:08 pm

Re: Designing simple organic shapes

Postby ulrich1a » Mon Apr 30, 2018 10:15 am

Have a look at the Surface Workbench: https://www.freecadweb.org/wiki/Surface_Module

I tried to model an organic shape with this tools. My experiences are mixed. I set up a frame made of connected sketches and filled surfaces into this framework. The results are not always as good as I wanted, but something is doable. Be prepared to safe often, as I experienced some crashes.

Ulrich
thschrader
Posts: 1708
Joined: Sat May 20, 2017 12:06 pm
Location: Germany

Re: Designing simple organic shapes

Postby thschrader » Mon Apr 30, 2018 11:49 am

kefir wrote:
Sat Apr 28, 2018 11:27 am
I'd like to learn if it's possible to use freecad for simple (or complex) organic shapes.
Not easy, but possible.
See the post from hammax (snail-shell):
https://forum.freecadweb.org/viewtopic. ... 4&start=30
and
modelling acoustic-foam:
https://forum.freecadweb.org/viewtopic.php?t=26260