Full Version: UnwrapCurve plug-in

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More examples :)

Unwrap Curve script + Curve to Curve flow





Rebuild +Unwrap Curve script + Surface to Surface flow

Image Attachments:
Construction Lines 14.gif  Image101.jpg  Image97.jpg 

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Very cool pedagogic images!

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Hello, I was not able to achieve what you had achieved!

I used arc 3pts to create a curved surface then I used unwrap curve to create a flat surface ( I tried to keep the number of points equal using rebuild command)

Then I created a textured solid and finally used Flow command!) but I was not able to achieve what you had achieved!

Could you please help?

Attachments:
Curved_Texture.3dm

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Hi Psygorn, if you select your surface and turn on control points, you should see that the "underlying surface" of your flat surface looks like this:



It's a rectangular plane with trim curves on it - that's the kind of surface that will be generated by the Construct > Planar command.

For use with Flow in your case here you need to construct a flat surface where the "underlying surface" has the trapezoidal shape to it, not just the trim curves having a trapezoidal shape. There are a few different ways to do that, one would be to loft between 2 lines like this:



If you then turn on surface control points for that shape, you can see that the actual surface has that trapezoidal shape to it, it's not just the trim curves that have that shape:


If you make the base surface like that, and also move it right on the bottom of the shape to deform, you can then run the Flow command on it to get this result (you can hide the object to be deformed after launching the Flow command to make it easier to pick on the base surface):




Let me know if you're still not able to produce this result.

- Michael

Image Attachments:
psygorn_flow1.jpg  psygorn_flow2.jpg  psygorn_flow3.jpg  psygorn_flow4.jpg 

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Hi Michael,

I got the same results :) Thank you!

However, I noticed if the lines that are used to create the trapezoid surface using loft command have more points (let's say 10) The results would be different.

Edit: Also is it possible to unwrap cylindrical or curved surfaces directly?

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Update:

I had tried the same technique to create textured cylindrical shape, However the bumps end up inside of the cylindrical surface & not outside of it!

Note: I tried to click different corners of base surface and even rotated cylindrical surface along its height . I couldn't get desired result! what am I doing wrong?

Attachments:
Cylindrical_Texture.3dm

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Hi Psygorn,

Use the option Flip normal surface in the Flow's option UI frame.

Have you tested it ?


Regards

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Hi Phiro,

Yes, I did! but it was after I left my message here! It worked! :)

and I forgot to come back here and say it! Sorry, My bad!

Anyway I want to thank you for your reply :)

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@ Michael,

Is it possible to have an "Offset" option in Flow UI?

So we can set an offset from the target surface? Is ti possible? I think it might come in handy!

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There is a home-made script to unwrap cones or frustums. It may not be working for cylinders(?)
- Brian

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Hi Phiro,

Do u know how I could wrap those Voronoi cells around that curved surface(Target Surface)?

After performing flow command generated geometry looks messy and not neat like what Zooen did in his/her work! ( look for the thread "Ears of wheat")

Any help is appreciated :)

Attachments:
Curved_Surface_Texture.3dm

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Honestly I thought the script/s are here in this thread but I couldn't find them! (I was looking for a Zip file)

Where could I find the mentioned home made Script/s?

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Hi Psygorn,

re:
> However, I noticed if the lines that are used to create the trapezoid surface using loft command
> have more points (let's say 10) The results would be different.

That could happen if the 10 points were not spaced evenly across the distance. That would then create some compression or expansion in the result since the surface parameterization would not be uniform across the base plane.

For base planes it's best to generate simple bilinear surfaces made up of only 4 corner points instead of made up of more points. That kind of surface has the most simple and predictable kind of parameterization to it.


> Edit: Also is it possible to unwrap cylindrical or curved surfaces directly?

No, not currently. There is usually not a single defined unwrapping without distortion for a general curved surface.


> I had tried the same technique to create textured cylindrical shape, However the bumps end up inside
> of the cylindrical surface & not outside of it!

Like Phiro wrote above use the "Flip surface normal" option in the Flow command to deal with this.


re:
> Is it possible to have an "Offset" option in Flow UI?
>
> So we can set an offset from the target surface? Is ti possible? I think it might come in handy!

You can accomplish this currently by positioning your object above or below the base surface by your offset distance.


> Honestly I thought the script/s are here in this thread but I couldn't find them! (I was looking for a Zip file)
>
> Where could I find the mentioned home made Script/s?

I think it's on this thread here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6175.1

- Michael

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Hi Psygorn,

re:
> After performing flow command generated geometry looks messy and not neat like
> what Zooen did in his/her work! ( look for the thread "Ears of wheat")

Using your file I get a result like this which does not look messy to me:



- Michael

Image Attachments:
psygorn_not_messy.jpg 

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Thank you Michael! :)

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Hi Michael,

By "Messy" I meant Below:

The Voronoi cells look more distorted! and it seems they are wrapped around a symmetrical surface (Like a funnel). Note: My target surface is not symmetrical!

And if you saw below link:
Edit: http://moi3d.com/forum/messages.php?webtag=MOI&msg=10315.1
Zooen has created an amazing vase!

I wanted to replicate upper part of his/her vase! I feel like my file does not look anything like that! Maybe I am wrong! but this is what I feel!

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Hi Psygorn,

re:
> The Voronoi cells look more distorted! and it seems they are wrapped around
> a symmetrical surface (Like a funnel). Note: My target surface is not symmetrical!

The funnel look is because the "underlying surface" of your trimmed surface is funnel shaped. Try selecting it and using Edit > Show pt to show its control points:



Flow works on the structure of the underlying base surface, it won't use trimming boundaries other than shrinking the underlying surface down to encompass the trims.

So you can't affect the shape of the flow result by applying a trim or boolean on the target surface like you have done here. You need to shape the underlying untrimmed base surface by generating it in that desired shape initially using something like loft or sweep to those boundaries, not cutting to those boundaries. Cutting generates trim boundaries, it does not affect the shape of the underlying surface that Flow uses.

Another thing you could do to reduce squishing would be to use the Rebuild command on your generator curve before doing a revolve with it. That will give it an even parameterization and help to avoid compression or expansion in areas where your generator curve has control points unevenly spaced.

- Michael

Image Attachments:
psygorn_trimmed_srf.jpg 

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As Michael said, if you want to flow without this problems you have to reconstruct this part with a loft or sweep method.

My proposition, but I'm not sure this is the more orthodoxe one, is to follow this process :
- drawing some horizontal lines (use array or do it one by one)
- project these lines on you object
- select the object
- (Construct / Curve / Project)
- select the lines
- with the curves you did plus the top and bottom edges of your object, you can do your loft.


I added left the superposition of original and rebuild surfaces to see if this is correct. It seems good.



Curved_Surface_Texture_fx.3dm

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Seems i have a not so bad result only with the Flow function!

Just place the Start trapezoïdal surface in the middle of the Vornonoi piece! ;)

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Thank you Michael :)

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