# Curve Trim/Extend Problem

**URL:** <https://forum.dynamobim.com/t/curve-trim-extend-problem/74708>\
**Category:** Revit\
**Tags:** dynamo\
**Created:** [March 23, 2022, 3:05pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708 "2022-03-23T15:05:33Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![DynaGirlBIM](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/dynagirlbim/32/98488_2.png) [@DynaGirlBIM](https://forum.dynamobim.com/u/DynaGirlBIM)\
**Post date:** [March 23, 2022, 3:05pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/1 "2022-03-23T15:05:33Z")

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Hi everyone,

I have a problem.  
I want to trim or extend curve start and end point. I want to a complete line.  
I attached screenshot.  
Do you have any idea ?

![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/3/83b42f29a04d7dc09982ee47bf89c23aa16fc34a.png)

Thank you so much.

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**Author:** ![sovitek](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/sovitek/32/116237_2.png) [@sovitek](https://forum.dynamobim.com/u/sovitek)\
**Post date:** [March 23, 2022, 4:12pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/2 "2022-03-23T16:12:30Z")

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Hello @DynaGirlBIM …probably line merge from spring can help you here…

 ![Screenshot 2022-03-23 171109](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/0/b0c95bac453e1eb10e98dbe42c8c5b41b1a42f51.png)

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**Author:** ![Elie.Trad](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/elie.trad/32/110373_2.png) [@Elie.Trad](https://forum.dynamobim.com/u/Elie.Trad)\
**Post date:** [March 23, 2022, 4:36pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/3 "2022-03-23T16:36:50Z")

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@DynaGirlBIM make it a polycurve then use offset.

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**Author:** ![DynaGirlBIM](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/dynagirlbim/32/98488_2.png) [@DynaGirlBIM](https://forum.dynamobim.com/u/DynaGirlBIM)\
**Post date:** [March 24, 2022, 7:29am UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/4 "2022-03-24T07:29:32Z")

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Hi @sovitek ,

I understand your post. But How to use margin input ? 100 or 1 what is this ?

Thank you again 😉

@Elie.Trad Hi , I can’t make polycurve because they did not join curves.

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**Author:** ![sovitek](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/sovitek/32/116237_2.png) [@sovitek](https://forum.dynamobim.com/u/sovitek)\
**Post date:** [March 24, 2022, 7:42am UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/5 "2022-03-24T07:42:11Z")

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Hello think its the margin it will join in my case 500 works…think what @Elie.Trad suggest is join the middle curve as polycurve and offset and think its the best way in your case, but havent look the right way in your image…

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**Author:** ![Organon](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/organon/32/161404_2.png) [@Organon](https://forum.dynamobim.com/u/Organon)\
**Post date:** [March 24, 2022, 3:04pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/6 "2022-03-24T15:04:48Z")

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@DynaGirlBIM

Hi,

As @Elie.Trad mentioned, you can use the original curves to create a polycurve and offset the new curve.

Regards,

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**Author:** ![DynaGirlBIM](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/dynagirlbim/32/98488_2.png) [@DynaGirlBIM](https://forum.dynamobim.com/u/DynaGirlBIM)\
**Post date:** [March 28, 2022, 2:22pm UTC](https://forum.dynamobim.com/t/curve-trim-extend-problem/74708/7 "2022-03-28T14:22:07Z")

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Thank you for feedback @Organon , I am working on it 😉