# Points in different orders? (Polyline vs. Interpolate Curve)

**URL:** <https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585>\
**Category:** Grasshopper\
**Tags:** windows, mac\
**Created:** [April 1, 2026, 12:28pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585 "2026-04-01T12:28:22Z")\
**Posts on this page:** 11\
**Page:** 1

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**Author:** ![Andrew\_Turner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andrew_turner/32/770117_2.png) [@Andrew\_Turner](https://discourse.mcneel.com/u/Andrew_Turner)\
**Post date:** [April 1, 2026, 12:28pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/1 "2026-04-01T12:28:22Z")

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![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/2/7/02763f3c7b6dd9fe61fe3e63137b8ae2d035f896.png)

Why are these points being selected in different orders?

Just going through some basic tutorials and ran into this… haven’t found the cause, though.

Points were duplicated, so they’re exactly the same.

thanks

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**Author:** ![Edr](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/edr/32/684630_2.png) [@Edr](https://discourse.mcneel.com/u/Edr)\
**Post date:** [April 1, 2026, 12:31pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/2 "2026-04-01T12:31:35Z")

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Did you select points one by one or all at the same time?

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**Author:** ![Andrew\_Turner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andrew_turner/32/770117_2.png) [@Andrew\_Turner](https://discourse.mcneel.com/u/Andrew_Turner)\
**Post date:** [April 1, 2026, 12:36pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/3 "2026-04-01T12:36:38Z")

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All at the same time, though I’ve just reassigned the points to each, and they’re in the same (“incorrect”) order:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/5/a/3/5a34956fef222e7e9f7020c9a4453b6d2c5e0d41.png)

However, the same thing happened with a new point set. Seems like a bug:

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/5/f/c/5fc2209d4b7f79d23b14dad1d7efed15121fcc22.png)

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**Author:** ![Edr](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/edr/32/684630_2.png) [@Edr](https://discourse.mcneel.com/u/Edr)\
**Post date:** [April 1, 2026, 1:18pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/4 "2026-04-01T13:18:02Z")

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hmm, When you drag and select points you are not defining order of selected objects and leave space for interpretation and unexpected results.

But same list of points should produce same line

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**Author:** ![Eef\_Weenink](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/eef_weenink/32/764753_2.png) [@Eef\_Weenink](https://discourse.mcneel.com/u/Eef_Weenink)\
**Post date:** [April 1, 2026, 3:48pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/5 "2026-04-01T15:48:12Z")

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To be sure of the order of points: Reorder them.

- sort along curve (used very often) Create a line, curve, circle, union region of bounded box ,whatever comes close, and sort along.
- sort point in x,y,z order. SortPt
- and if nothing helps, reorder them manually.  
My method: graft , BANG (now you have a list.) connect one by one to merge,  
then to Point. Internalise, and delete the old one.

Regards, Eef

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<div class="post-metadata">

**Author:** ![Andrew\_Turner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andrew_turner/32/770117_2.png) [@Andrew\_Turner](https://discourse.mcneel.com/u/Andrew_Turner)\
**Post date:** [April 1, 2026, 4:05pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/6 "2026-04-01T16:05:26Z")

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Thanks Eef - I’d rather avoid that, as I’ll be using the same point set for multiple operation - also will be generating some sets out of Grasshopper.

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**Author:** ![Eef\_Weenink](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/eef_weenink/32/764753_2.png) [@Eef\_Weenink](https://discourse.mcneel.com/u/Eef_Weenink)\
**Post date:** [April 1, 2026, 5:09pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/7 "2026-04-01T17:09:41Z")

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then please upload your set, so we can have a look, and find maybe a cause and solution. regards Eef

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**Author:** ![Andrew\_Turner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andrew_turner/32/770117_2.png) [@Andrew\_Turner](https://discourse.mcneel.com/u/Andrew_Turner)\
**Post date:** [April 2, 2026, 3:57pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/8 "2026-04-02T15:57:20Z")

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Thanks Eef -here you go.

[tutorial 2.gh](https://discourse.mcneel.com/uploads/short-url/wlVKRgLNyMU6onWFJZKnPnn37Kx.gh) (15.3 KB)

[tutorial 2.3dm](https://discourse.mcneel.com/uploads/short-url/iw1GbOwuVoqwUzXk3u4GGWcyB2o.3dm) (189.2 KB)

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**Author:** ![Volker\_Rakow](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/volker_rakow/32/770451_2.png) [@Volker\_Rakow](https://discourse.mcneel.com/u/Volker_Rakow)\
**Post date:** [April 2, 2026, 7:22pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/9 "2026-04-02T19:22:11Z")

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![Screenshot 2026-04-02 212130](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/b/0/e/b0e97aa32069b44c31d529d14f68e60a0f2ac97b.jpeg)

No problems on my end.

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<div class="post-metadata">

**Author:** ![Andrew\_Turner](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/andrew_turner/32/770117_2.png) [@Andrew\_Turner](https://discourse.mcneel.com/u/Andrew_Turner)\
**Post date:** [April 2, 2026, 7:51pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/10 "2026-04-02T19:51:29Z")

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Thanks @Volker_Rakow - the bottom one (curve) is still in the wrong order.

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<div class="post-metadata">

**Author:** ![Volker\_Rakow](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/volker_rakow/32/770451_2.png) [@Volker\_Rakow](https://discourse.mcneel.com/u/Volker_Rakow)\
**Post date:** [April 2, 2026, 7:59pm UTC](https://discourse.mcneel.com/t/points-in-different-orders-polyline-vs-interpolate-curve/217585/11 "2026-04-02T19:59:47Z")

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The two point containers do not contain the same lists of points.