# Make2d splitting lines.....?

**URL:** <https://discourse.mcneel.com/t/make2d-splitting-lines/72626>\
**Category:** Rhino for Windows\
**Created:** [October 8, 2018, 12:32pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626 "2018-10-08T12:32:22Z")\
**Posts on this page:** 17\
**Page:** 1

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**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 8, 2018, 12:32pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/1 "2018-10-08T12:32:22Z")

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This is R6 sr8…Lines are getting split because of polysurfaces behind…? Is there a setting I’m missing. I can post an example if needed.

Brian

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**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 8, 2018, 12:56pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/2 "2018-10-08T12:56:20Z")

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This doesn’t happen in R5.

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**Author:** ![AlW](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/alw/32/53821_2.png) [@AlW](https://discourse.mcneel.com/u/AlW)\
**Post date:** [October 8, 2018, 1:22pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/3 "2018-10-08T13:22:59Z")

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R6 SR9 has now been released and so has the first RC for SR10. I would suggest upgrading and then updating your post if the problem still exists (or has been corrected).

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**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 8, 2018, 1:42pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/4 "2018-10-08T13:42:58Z")

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Problem is still there in SR9 and I’m not sure where to even get RC SR10 from. BTW when I checked for updates Rhino said I was current, I had to manually download SR9.

See attached file, make2d front view, all lines are split where any lines in the background cross.[make2d-split-lines-example.3dm](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/4/4/44cf86e22c2975de066e8e0994b444a994b1505f.3dm) (1010.0 KB)

Brian

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 12:12pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/5 "2018-10-09T12:12:47Z")

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So is this an issue on my end…a new feature…or a bug…?

Brian

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**Author:** ![davidcockey](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/davidcockey/32/732604_2.png) [@davidcockey](https://discourse.mcneel.com/u/davidcockey)\
**Post date:** [October 9, 2018, 1:49pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/6 "2018-10-09T13:49:35Z")

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I only see one line or curve in your file which is in the low-wall-cap layer. I’m referring to Rhino line and curve objects which I searched for using SelCrv.

Are you possibly referring to the “isolines” of a surface? If so isolines are a function of individual surfaces including the surfaces which make up a polysurface. They are part of the display of surfaces, not separate objects.

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 2:06pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/7 "2018-10-09T14:06:56Z")

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I should have ran the make2d function and showed the results on the file I attached above. See file attached here with the make2d function ran and the resulting line work with the circle around it in the top view. Notice all the line segments.[make2d-split-lines-example–2.3dm](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/0/2/02e2c6d248c840e999feb7c6e49a89d79a4e00ec.3dm) (1.1 MB)

Brian

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [October 9, 2018, 3:04pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/8 "2018-10-09T15:04:51Z")

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Hi Brian - is this an example of what you’re asking about?

![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/d/7/d79a0ba0f87d2c37de5b25cea789644859ce9be4.png)

-Pascal

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 3:11pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/9 "2018-10-09T15:11:39Z")

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Yes…That happens anytime there is a line in the background, the line in front is split.

Brian

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**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [October 9, 2018, 3:40pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/10 "2018-10-09T15:40:35Z")

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Hi Brian - can you post a screen grab of the Make2d settings you’re using? Either this is fixed or I am too stupid to repeat it…

-Pascal

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 4:03pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/11 "2018-10-09T16:03:30Z")

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Here you go…It’s probably something I’m doing with the settings.

 ![screen-grab-make2d-settings](https://global.discourse-cdn.com/mcneel/original/3X/d/f/df79d74320332ec24b63383ab30dc709902f3da2.jpeg)

Brian

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<div class="post-metadata">

**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [October 9, 2018, 4:06pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/12 "2018-10-09T16:06:04Z")

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Ok, yeah it was the ‘too stupid’ bit. I had grouping. I’ll see what I can find out.

-Pascal

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 4:20pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/13 "2018-10-09T16:20:41Z")

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Grouping works in Rhino but when imported into Acad there are split again.

Brian

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<div class="post-metadata">

**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [October 9, 2018, 4:22pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/14 "2018-10-09T16:22:13Z")

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… I just meant that I was being tricked by grouping into thinking things were one curve when they are not…  
Double espresso, coming up.

-Pascal

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<div class="post-metadata">

**Author:** ![pascal](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/pascal/32/479395_2.png) [@pascal](https://discourse.mcneel.com/u/pascal)\
**Post date:** [October 9, 2018, 5:23pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/15 "2018-10-09T17:23:03Z")

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@bwheeler - I just chatted with the developer - it turns out this is neither a feature nor a bug, but is just the way it is… No one, to my knowledge or recollection anyway, has said it is wrong in all the V6 cycle, though there was a ton of churn around Make2D durung development. The fact that until now this aspect seems to have been OK out in the field makes it difficult to just go in and ‘fix’ - we don’t know how much evil would ensue.

So… I will make a bugtrack item to revisit this in V7, when at least it will not be a change in mid stream, and in the meantime, if you are not doing this already, in many cases at least, you may be able to get away with selecting the Make2d output by layer and running `Join`, followed by `SimplifyCrv`.

-Pascal

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<div class="post-metadata">

**Author:** ![bwheeler](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/bwheeler/32/694352_2.png) [@bwheeler](https://discourse.mcneel.com/u/bwheeler)\
**Post date:** [October 9, 2018, 5:44pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/16 "2018-10-09T17:44:13Z")

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Thank You for looking into it Pascal…I’ll just use R5 for Make2d it works correctly…For me anyway. Once I finish the project I’m working on now I’ll switch over to the WIP. I can’t believe I never caught this before…I have used R6(WIP) since it first came out.

Brian

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<div class="post-metadata">

**Author:** ![brian](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/brian/32/504171_2.png) [@brian](https://discourse.mcneel.com/u/brian)\
**Post date:** [January 24, 2023, 10:35pm UTC](https://discourse.mcneel.com/t/make2d-splitting-lines/72626/18 "2023-01-24T22:35:23Z")

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[RH-57426](https://mcneel.myjetbrains.com/youtrack/issue/RH-57426) is fixed in the latest [WIP](https://discourse.mcneel.com/t/welcome-to-serengeti/9612)