# Problem with spline and CVs dissapearing

**URL:** <https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75>\
**Category:** Modeling Questions\
**Created:** [March 4, 2016, 3:39pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75 "2016-03-04T15:39:00Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 3:39pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/1 "2016-03-04T15:39:00Z")

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it seems that the is a bug in the spline tool because it looses CVs

Videos:  
[https://goo.gl/photos/9jdrztNjxETTsdc37](https://goo.gl/photos/9jdrztNjxETTsdc37)

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 3:42pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/2 "2016-03-04T15:42:47Z")

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Huh, that’s a good catch, thanks! I will look into this, will be fixed in the next release.

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 4:24pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/3 "2016-03-04T16:24:31Z")

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Just fixed it, thanks again, these kind of feedbacks are very useful.

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**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 4:58pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/4 "2016-03-04T16:58:19Z")

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U are welcome! This is a pretty great app already!

there is currently no way to split trim or join curves?  
Or draw a spline tangent out of a line/arc/spline?

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 5:20pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/5 "2016-03-04T17:20:21Z")

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Currently: no, but in a few weeks: YES! 🙂  
The roadmap for the next few weeks:

Implemented already, and will be in the next build:

- regular views (top, bottom, left, right, front, back)
- predefined grids to xy, yz, zx  
-setting pivot center for transforms  
-more transform tools (move from to, mirror, rotate around axis)

Coming after the next release:  
-primitive shapes  
-primitive curves  
-curve operations (trimming, filleting)  
Who knows what else 🙂

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 5:47pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/6 "2016-03-04T17:47:16Z")

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Oh I would have plenty to add for what else lol.

This is a great step forward. This application reminds me of MOI 3D.

I am a long time Rhino user and while it is powerful, I feel it makes things to  
complicated to many tools for specific tasks.

MOI cuts that down nicely to what you want and only need!  
Obviously many tools are missing but for ideation MOI is spot on.

And I see your app going the same nice fluid way:

Just the chamfer fillet drag direction is one of those smart choices.

Curve network, G2 Blend, G2 Fillet would be very welcome tools.  
I often find many of these apps stop at G1 and as a designer this is the least  
attractive surface detail.

Maybe also the ability to have zebra and an env map projected onto the product.  
The GPU of the iPadPro is now quite powerful.

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 5:49pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/7 "2016-03-04T17:49:57Z")

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I sent you an email with a tutorial to the freeform surface tool, check it out. The freeform surface tool is basically a curve network.

Yeah, probably we will have advanced continuity controls later.

Zebra rendering could be implemented quite easily, we will do it in the next few months.

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**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 5:53pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/8 "2016-03-04T17:53:47Z")

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HOLY HOLY SHIT BUT SERIOUSLY!

This is amazing.

BTW Autodesk gave up on this with their attempt.

I love seeing this tool as I know it somewhat from Catia.

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 5:55pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/9 "2016-03-04T17:55:51Z")

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It is quite experimental, but already quite awesome stuff can be done with it.

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 5:56pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/10 "2016-03-04T17:56:36Z")

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yeah this are very comples shapes and it handles it quite well.

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**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 5:59pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/11 "2016-03-04T17:59:16Z")

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I would love to see someone making something with it 🙂 (HINT!)

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 4, 2016, 6:05pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/12 "2016-03-04T18:05:25Z")

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What does it like and not? I can get some funny results 😉

![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/e8f525f7d98fb132eaf1a1b05fca85e334b9a383.png)

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<div class="post-metadata">

**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 4, 2016, 6:16pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/13 "2016-03-04T18:16:19Z")

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Haha… 😃 If you add more contours, it will result better surfaces.

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<div class="post-metadata">

**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 5, 2016, 2:51pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/14 "2016-03-05T14:51:03Z")

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BTW, thanks for your report… It helped me to track down some hard to find issues in the freeform surface tool, and thanks to you, I could fix it, and now the entire freeform surface tool has just became much better:  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/52cae1fbbb58d54d1283f716b4b21e98b340fde7.jpg)

The fix will be included in the next release

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 5, 2016, 4:35pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/15 "2016-03-05T16:35:31Z")

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Can you push out an update ? The. Problem with the spline tool makes me not use it.

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<div class="post-metadata">

**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 5, 2016, 4:36pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/16 "2016-03-05T16:36:55Z")

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We are working on the next release. Probably we will push it out on Monday.

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 5, 2016, 5:52pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/17 "2016-03-05T17:52:59Z")

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Yuhu! Thank you for the note.

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<div class="post-metadata">

**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 7, 2016, 3:01pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/18 "2016-03-07T15:01:07Z")

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So we fixed a lot of bugs in the freeform tool, now it can make some pretty cools stuff by simply adding a few contours, it will be included in the upcoming release  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/0fd727a73ee612b3828a56e50dbf73bc807d0eab.jpg)  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/367b372f89e8dd713bde811f56049b0e6a4e8233.jpg):

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<div class="post-metadata">

**Author:** ![CEKuhnen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/cekuhnen/32/125_2.png) [@CEKuhnen](https://discourse.shapr3d.com/u/CEKuhnen)\
**Post date:** [March 7, 2016, 3:14pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/19 "2016-03-07T15:14:40Z")

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This is incredible to see - cannot wait till I can test it!

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<div class="post-metadata">

**Author:** ![Istvan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/istvan/32/23668_2.png) [@Istvan](https://discourse.shapr3d.com/u/Istvan)\
**Post date:** [March 7, 2016, 4:23pm UTC](https://discourse.shapr3d.com/t/problem-with-spline-and-cvs-dissapearing/75/20 "2016-03-07T16:23:29Z")

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You can start with non-planar surfaces as well:  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/6e6b724921f655b38073625a2efeba38557245fc.jpg)  
 ![](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/1X/af3b35b2ce766581c870ca5c4f48127dcec2b8ee.jpg)

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