# Why this using sweep1?

**URL:** <https://discourse.mcneel.com/t/why-this-using-sweep1/126770>\
**Category:** Rhino\
**Tags:** windows\
**Created:** [June 30, 2021, 6:52pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770 "2021-06-30T18:52:46Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![CalypsoArt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/calypsoart/32/770614_2.png) [@CalypsoArt](https://discourse.mcneel.com/u/CalypsoArt)\
**Post date:** [June 30, 2021, 6:52pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770/1 "2021-06-30T18:52:46Z")

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The break happens no matter the diameter.

 ![HOW](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/8/6/2/862c79f5eb00eb72e1e4120054f7f534a9dd761d.jpeg)

[WHY.3dm](https://discourse.mcneel.com/uploads/short-url/625RKST7slCZT6OJRlVbLDu614B.3dm) (980.1 KB)

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**Author:** ![Gijs](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gijs/32/769882_2.png) [@Gijs](https://discourse.mcneel.com/u/Gijs)\
**Post date:** [June 30, 2021, 7:44pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770/2 "2021-06-30T19:44:22Z")

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there is a slight kink (G0) transition there, is it needed? if you can make it G1 it will probably work correctly

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**Author:** ![CalypsoArt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/calypsoart/32/770614_2.png) [@CalypsoArt](https://discourse.mcneel.com/u/CalypsoArt)\
**Post date:** [June 30, 2021, 7:52pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770/3 "2021-06-30T19:52:09Z")

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I can see the kink when I zoom in close to the original curve I rotated. I’m not certain I’ve completely wrapped my head around the G labels, but I’m getting there. How/where do I find that info about an object, and then change it?

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**Author:** ![Gijs](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/gijs/32/769882_2.png) [@Gijs](https://discourse.mcneel.com/u/Gijs)\
**Post date:** [June 30, 2021, 7:57pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770/4 "2021-06-30T19:57:08Z")

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> [@CalypsoArt](#):
>
> How/where do I find that info about an object

exploded the curves and use GCon

> [@CalypsoArt](#):
>
> and then change it?

you could replace marked curves with tangent blendcurves, since these curves are G0 at both ends:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/4/c/8/4c8e99cd7bdd162ae2824251dac524ba4a9d0951.jpeg)

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<div class="post-metadata">

**Author:** ![CalypsoArt](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/calypsoart/32/770614_2.png) [@CalypsoArt](https://discourse.mcneel.com/u/CalypsoArt)\
**Post date:** [June 30, 2021, 8:03pm UTC](https://discourse.mcneel.com/t/why-this-using-sweep1/126770/5 "2021-06-30T20:03:43Z")

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Thanks. BlendCrv and trimming with the created blend worked.