topic Re: Creating an object from curves positioned in different angles in Fusion Design, Validate & Document Forum

Creating an object from curves positioned in different angles

Anonymous — Sun, 17 Mar 2019 10:03:02 GMT

Is there a way to create an object/body from a set of curves which are distributed in 3d with different angles to each other? Something like a loft, but with curves positioned in many directions (see the examples below). In my understanding with a loft, all curves are horizontally aligned in 2 dimensions, just shifted from basic sketch in the 3rd one. Whereas what I need is that curves can be in any position to each other.

(These are just simplified examples to illustrate the functionality. In reality the curves might be any organic shape being in any angles to each other).

Betreff: Creating an object from curves positioned in different angles

g-andresen — Sun, 17 Mar 2019 10:54:37 GMT

Hi,

not sure, but that maybe something you‘re looking for.

günther

Re: Creating an object from curves positioned in different angles

Beyondforce — Sun, 17 Mar 2019 10:56:27 GMT

Hi @Anonymous ,

Yes you can, but you will have to be more specific. The examples shapes you have added can be created with only 1 or 2 sketches and with various tools. They are very basic shapes!

If you have other body shapes which are more complex, then please attach them and we will help you.

Cheers / Ben
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Betreff: Creating an object from curves positioned in different angles

Anonymous — Sun, 17 Mar 2019 11:39:48 GMT

No this is not the solution. I don't need SLICING I need the opposite process.

Re: Creating an object from curves positioned in different angles

Anonymous — Sun, 17 Mar 2019 11:49:02 GMT

Hi Ben, of course they are basic shapes! That's what I wrote below the examples - that they are just basic examples.

I didn't give any particular object on purpose, because I don't need to create a specific object. I need a FUNCTION which would produce that result for any given curves.

And no, the solution isn't to sketch and create the object manually according to the curves.

And no, the solution isn't to create a form and modify it manually to match the curves.

Re: Creating an object from curves positioned in different angles

TrippyLighting — Sun, 17 Mar 2019 11:59:08 GMT

The function you are looking for is a loft. Your understanding of what a loft does is likely incomplete.

You can loft between a number of curves that are at arbitrary orientations in space.

Re: Creating an object from curves positioned in different angles

Anonymous — Tue, 19 Mar 2019 07:05:46 GMT

Now I can see that you are correct that they can be angeled. I just tried it with a simpler example and it worked, but it doesn't work for majority of other curves. I get an error or the button OK is grey and unaccessible.

Can you post a screencast how to do it for objects in the examples above and the one here below please?

Re: Creating an object from curves positioned in different angles

davebYYPCU — Tue, 19 Mar 2019 09:20:50 GMT

Loft works with from here to there, and just to make it more complicated, will not tolerate self intersections, or Rails that are not connected to profiles.

that said, those 3 profiles are not apparently connected, so you are left with three patched plates.

Might help....

Re: Creating an object from curves positioned in different angles

Anonymous — Fri, 22 Mar 2019 09:24:53 GMT

I was hoping there could be some 3rd party plugin that someone knows about? Or perhaps there is some other tool outside of Fusion 360 which can do it?

Re: Creating an object from curves positioned in different angles

laughingcreek — Fri, 22 Mar 2019 18:37:36 GMT

I'm curious to know what you think your latest example would look like as a solid?

Re: Creating an object from curves positioned in different angles

Anonymous — Sun, 24 Mar 2019 08:37:16 GMT

That would depend on the parametrization of the solid shape calculator (e.g. how much the curves/edges would be defined as creased or smoothed), but in general I would expect similar approximation of the curves as loft does. That means this object would look like a kind of a deformed potato shape.

Re: Creating an object from curves positioned in different angles

laughingcreek — Sun, 24 Mar 2019 15:44:09 GMT

@Anonymous wrote:

I was hoping there could be some 3rd party plugin that someone knows about? Or perhaps there is some other tool outside of Fusion 360 which can do it?

To answer your question directly, I don't know of any computer/software tool that can do what our asking. The only tool I can think of would be the human brain.

Re: Creating an object from curves positioned in different angles

TrippyLighting — Sun, 24 Mar 2019 16:03:41 GMT

@Anonymous wrote:

That would depend on the parametrization of the solid shape calculator (e.g. how much the curves/edges would be defined as creased or smoothed)

No it would not. It is easy to create such a "potato" shape and derive such curves from the shape. However the reverse is not the case because these curves only describe that shape at those plane intersections and as such don't contain all the information required to re-create the shape.

These curves would also just be an approximation and would follow the surface precisely only within a given tolerance.

There are two ways to create such shapes with commonly available software: Sub-D quad polygon meshes and NURBS surfaces.

Both require a quadratic mesh of control vertices or CVs for short. That needs to be taken in consideration when creating the curves to create such an object.

Re: Creating an object from curves positioned in different angles

MichaelT_123 — Mon, 25 Mar 2019 10:44:59 GMT

Hi Mrs. Katy Sramkova,

The question you are so bravely posted on this forum is a quite complex one. It touches deep roots of topology.

It is also not precise enough to give a definitive answer. What is missing is the definition of relations of these curves to the projected outcome. F360 gives tools to define such relations and execute them so the same curve(s) can be a base for different topological outcomes ( e.g. circle can produce a circular patch, sphere, cylinder...).

Those basic tools can be merged/intermingled together creating the number of possibilities so great that (given unlimited? time) current universe could burst, collapse or seek quarkitative easing.

So,… how to intermingle F360 topological tools? Many designs/examples are available on F360 and within is a quite valuable library.

As I pointed above, most important, however, is the clear definition of the particular objective/outcome. The search for the global solution (as a topological universe is so wast) will not work. Also, as pointed rightfully by Mr. LaughingCreak, ‘the human brain’ would be a very valuable asset here.

Having said that you must be aware of significant sometimes arduous and in case of organic objects quite back-breaking/mind-breaking experiences as F360 is not strong in this area.

Dependent upon your objectives, skill level, determination and a bit of lack… everything within constraints of NATURAL LOW is possible. Achieving the impossible requires miracle(s) which happen from time to time, but it does not require any effort, just patience.

For your perusal find attached the following examples. Instructions on how to view them are stated in:

https://forums.autodesk.com/t5/fusion-360-design-validate/platonic-solids/m-p/8482551#M177760

Viewing 4K/stereo video requires hardware of reasonable punch, not extreme though.

And some video files in 4K/mp4 format :

Description Mono Videos Anaglyph Stereo Video

Shell Natalina https://a360.co/2JBpeol https://a360.co/2JAudFW

Shell Oxystele https://a360.co/2JExUKX https://a360.co/2U8FGQZ

Trefoil_3_2_K https://a360.co/2OoxUNP https://a360.co/2JCRp6m

trefoil_Fig8_K https://a360.co/2OqpVj2 https://a360.co/2Oozm2v

Regards

MichaelT