Flow tool issue

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 From:  gunter511
7149.1 
Hi,

I am trying to deform the oval donut shape into a longitudinally concave shape. Hopefully the image explains what I mean.
Problem is I'm not able to do it. I click on the shape first, then click Flow, then deform, then base line curve, then target curve but it doesn't work.
Could someone please point out what I'm doing wrong?

On another note, when I take a screen shot of the moi UI to show you guys what my problem is, I have to add annotations in Photoshop. Does Moi3d have any way
to annotate?

Thanks much.
Gunter




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 From:  Frenchy Pilou (PILOU)
7149.2 In reply to 7149.1 
Better if you link a file 3dm! ;) (that'is avoiding to redraw something! )

Annotate not yet, but you have simple text! (menu Solid/ Text)

EDITED: 29 Dec 2014 by PILOU

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 From:  Frenchy Pilou (PILOU)
7149.3 In reply to 7149.2 
Just try in view Top to rotate the original form in another axe! ;)
And move the curves! Here curves are in the same vertical plane!
It's more predictive!

EDITED: 29 Dec 2014 by PILOU

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 From:  gunter511
7149.4 In reply to 7149.3 
Hi Pilou,

Thanks, I tried that but I can't seem to get it right.

As for simple text, how do I do that? I tried the 'text' option under 'draw solid' but that is in 3d.

Thanks,
Gunter
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 From:  Michael Gibson
7149.5 In reply to 7149.1 
Hi Gunter, currently there isn't any way in MoI to put in annotations. That is something that I want to add in the future though.

Like Pilou mentions, can you please post the 3DM model file with your objects in it? It will be much easier to see what might be going on if I can examine your actual file. It's hard to tell what might be going on just by looking at a screenshot, I need to be able to examine the objects.

You might try moving the base and target curves in the Top view so that they are located on one common plane, that might help with avoiding any possible twisting effect that might be going on.

- Michael
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 From:  Michael Gibson
7149.6 In reply to 7149.4 
Hi Gunter, thanks for posting the file, I will take a look at it in a minute.

> As for simple text, how do I do that? I tried the 'text' option under 'draw solid' but that is in 3d.

Moi only currently has a text tool that generates text as solids or curves to use for modeling operations. It does not currently have what would be called "annotation text" that is meant to be just on screen labels rather than geometry.

- Michael
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 From:  Frenchy Pilou (PILOU)
7149.7 
<< As for simple text, how do I do that? I tried the 'text' option under 'draw solid' but that is in 3d.

In the Function Text You have Options Solid/ Surface/ Curves ! ;)

Damned Michael was more speedy! :)
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 From:  gunter511
7149.8 
Michael/Pilaou,

Do you guys ever sleep? It seems you're 'on' 24/7...

It never ceases to amaze me how quickly you respond.

Hats off you guys!

Gunter
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 From:  Michael Gibson
7149.9 In reply to 7149.4 
Hi Gunter, thanks for posting the file. It seems to be working ok for me over here - what I did was to select your oval solid, then run Transform > Deform > Flow. Then at the first prompt I selected the line, at the second prompt I selected the arc and I get this result here:



That's what you will get initially because it transfers your object by taking the distance of a point as located from the start of the base curve, and moving along the target curve by that same distance, extending off the end by a line if it runs past the end.

You probably want to match things by percentages along each curve rather than just directed distance along each curve. For that enable the "Stretch" checkbox option and then you'll get this result:



Also you'll probably want to shorten your base line so that it does not stick out so far to either side of the object - because the object is only contained within a small area of the line it's also only contained within a small area inside the target curve as well. If you make the line fit the width of your object more closely it will also fit more closely to the extent of the arc as well.

Hope this helps, let me know if you are still stuck.

- Michael

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 From:  gunter511
7149.10 In reply to 7149.9 
Hi Michael,

I must still be doing something wrong because this is what I get...






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 From:  Frenchy Pilou (PILOU)
7149.11 In reply to 7149.10 
No special problem for me with your file! (on PC)
But I see that you are on MAC! ;)
This maybe explain that!

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 From:  Finema
7149.12 In reply to 7149.11 
It's OK on mac also
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 From:  Finema
7149.13 In reply to 7149.12 
and also, try to center the curves VS your object
see my screenshot
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 From:  Michael Gibson
7149.14 In reply to 7149.10 
Hi Gunter, are you using an older version like version 2.52 instead of the most recent version 3 ?

There have been some fixes to flow in version 3 to prevent that type of unwanted twisting from happening.

In earlier versions you can avoid the twisting if you rotate everything by 90 degrees in the side view so that the 2 path curves are flat in the Top view rather than being arranged vertically, that should probably then flow ok for you in version 2.52 .

- Michael
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 From:  gunter511
7149.15 
Michael, yes I'm using v2.52

So this is weird.. I can get it to work BUT only if I click the arc (which I assume is the target curve) first and the straight line (base line curve??) second.

Shouldn't it be the other way round... baseline first and target second?

Thanks all.
Gunter
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 From:  Michael Gibson
7149.16 In reply to 7149.15 
Hi Gunter, yes it should normally be base line first and curvy thing second. But the other way may produce a fairly similar effect since mapping from a curved base onto a line will also produce a certain kind of bending effect as well.

In v2.52 to get this type of curve flow to work it was needed to put both curves to be planar in the top view, if you rotate your objects so that it is like that, then it should probably work for you.

But I'd really recommend upgrading to v3 instead, there are a whole lot of improvements in v3 and one of them is to this specific issue that you're running into.

- Michael
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 From:  gunter511
7149.17 In reply to 7149.16 
Hey Michael,

Okay, if you say so... :)

Just upgraded and it works perfectly.

Thanks for your incredible support.

Gunter

EDITED: 29 Dec 2014 by GUNTER511

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