Hi everybody,

do you have any tips on how to create this interesting shape of a chocolate mold?

Kind regards

Helix has a tapered option.

sweep of a line segment for the "helicoid" ramp?

extrude? Boolean from cone?

- Brian

Corkscrew post:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6970.5

Hi rhinouser141, here's an initial attempt using sweep with the option twist = flat to make the ramp surface.

It seems like the tricky part is that the ramp needs to shrink as it approaches the top, instead of being a uniform shape like this:



- Michael

Hi rhinouser141,

take a look at the attached file. is this what u want? (notice the ramp does not have a constant width)

I was able to make that only using MOI. However, I forgot how exactly I was able to do it, let me know if you really need to know how you can do this. so, maybe I can redo it and make a little tutorial about it!

- Psygorn

Hi,
this is an option using the twist and loft tool.
I have done 2 options shown in photo.
If of some interest will post file.
Cheers
Barry

Another view of chocolate.

As for the volute of a violin, for my part, I cannot find a satisfactory solution. Well for now.

Deleted see later post

Here is my tip:



But when I look at that piece of chocolate and think of a Mould, I see the center of the twisting looks like it is at an angle.

We might think this is done due to drafting requirements for chocolate release after cooling. My method just uses the default plane with no angles added to the Mould.

I cant do it by eye. I would need an advanced Moulding software to calc the drafting releases on such a spiral and cut... then I would rotate the result around and hack off the top and bottom to use as the cut for the Mould.

And Solids ++ wins the fillet!

Hi Barry,

@If of some interest will post file.

I'd be interested to see how you made this chocolate candy (very close to the real thing, thank you).

Hi Burman, your approach is interesting, thank you.

As for violins, I know of only two artists who have mastered the subject: Cristóbal Vila, with Modo, and Ivan Kukucov with Blender (there may be others....?).

I have a whole stock of documents and videos on violins. With MoI3D, it's the Volute that's giving me trouble. I keep coming back to this subject, I'm not giving up!

Image 1 Cristóbal Vila > https://etereaestudios.com/2020/04/07/tutorial-violin/

Image 2 Ivan Kukucov > https://www.youtube.com/watch?v=aDdG91iEoH4

Deleted see later post.

I realized after the fact that my piece was not correct. The ramp starts tangent to the circle at the bottom.

Just 2 curves + sweep or NetWork and then plane top and bottom don't make the trick?
i don't yet yet try...

Hi,

Inspired by Barry's first two steps and with a passage through Blender and a return to MoI3D to finalize.

Hi Zooen,
I've found this method using solids rather than surfaces gives a better result.
The slope runs out before getting to base.
Anyway glad you have got a result with the surfaces method.
Cheers
Barry

Hi Barry,
>I have found that this method using solids rather than surfaces gives a better result.
The slope peters out before reaching the base.

Yes that's right, good job!

Hi Zooen
Try this node file. It makes the spiral shape you are looking for.
To make this work I had to modify the "sweep" node, So it can accept the "flat" option.("Sweep.js" is attached.)
Replace the "sweep" node inside "Construct.js" with attached .js file

You need to do the lofting and trimming manually. :)

Hi Mo,
can't get your node to work.
All nodes look ok.
Barry

Hi Barry-H,

Your picture looks the same as the result from my computer

I did add the new Sweep.js to the node extensions folder.
Is there some other Sweep,js that needs to be deleted?

- Brian

Hi Barry
>> can't get your node to work.

Sorry, I should've mentioned that it's not a complete node. It only makes the spiral shape and the base.
I couldn't find an easy way to automate the loft and trim process, So, Left it incomplete like you see.
Although, It is possible to do the rest manually.

After applying the node, you can join all pieces and loft the step area.
For me, the tricky part was to make a tangent line on top of the spiral.
This is how I'm doing it:
Make a construction line on the top of the spiral in the right viewport, (tan-int) Then draw a line on it.



In the top viewport, make a copy of this line and use the "loft" command to make a cutting surface.
Then, trim the spiral shape and cutting surface.