# How to close a volume?

**URL:** <https://discourse.mcneel.com/t/how-to-close-a-volume/64725>\
**Category:** Grasshopper\
**Created:** [June 9, 2018, 4:53pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725 "2018-06-09T16:53:21Z")\
**Posts on this page:** 18\
**Page:** 1

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**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 4:53pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/1 "2018-06-09T16:53:21Z")

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I want to close this cross vault in order to have a volume

[cross vault.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/9/e/9e53a6dbd8ff4fb9ec9e4188940460f981285f69.gh) (25.2 KB)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/f/b/fbfe39dbeaac91e5a42b084e8e1b53c5eea8e54b.png)

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**Author:** ![DavidRutten](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/davidrutten/32/755688_2.png) [@DavidRutten](https://discourse.mcneel.com/u/DavidRutten)\
**Post date:** [June 9, 2018, 5:09pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/2 "2018-06-09T17:09:29Z")

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You want to close it all the way down to the groundplane? Or just the bottom of the arcs? close it with vertical surfaces?

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**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 5:14pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/3 "2018-06-09T17:14:34Z")

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I want to close it to the groundplane with vertical surfaces ( like in the simple vault below)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/4/f/4fa2beee4242daf56a88156ba4b5386b47336013.png)

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**Author:** ![HS\_Kim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/hs_kim/32/473975_2.png) [@HS\_Kim](https://discourse.mcneel.com/u/HS_Kim)\
**Post date:** [June 9, 2018, 5:17pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/4 "2018-06-09T17:17:33Z")

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![capture-20180610-021551](https://global.discourse-cdn.com/mcneel/original/3X/9/9/999a51e91bc41a1096e5a749d1d5738f54c3926d.png)[cross vault\_re.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/0/0/003db011b7e5a90f2620f51038e90bf561ed1e00.gh) (24.0 KB)

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**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 5:20pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/5 "2018-06-09T17:20:21Z")

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thank you, but i didn’t mention it. The volume is until the groundplane 🙂

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**Author:** ![Michael\_Pryor](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/michael_pryor/32/489117_2.png) [@Michael\_Pryor](https://discourse.mcneel.com/u/Michael_Pryor)\
**Post date:** [June 9, 2018, 5:23pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/6 "2018-06-09T17:23:05Z")

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Look at your screenshot, You are missing information into the flip curve (yellow means warning)

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**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 5:26pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/7 "2018-06-09T17:26:40Z")

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yes that’s the point I couldn’t make the cross vault in the same way of a simple one… @Michael_Pryor

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**Author:** ![HS\_Kim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/hs_kim/32/473975_2.png) [@HS\_Kim](https://discourse.mcneel.com/u/HS_Kim)\
**Post date:** [June 9, 2018, 5:28pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/8 "2018-06-09T17:28:30Z")

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![capture-20180610-022734](https://global.discourse-cdn.com/mcneel/original/3X/2/2/22699130281f5e204d50e1adc146f9703ca143ce.png)[cross vault\_reV2.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/9/4/94e7ad0cffed9bda57ac7e8218a3c54271eb63f9.gh) (24.2 KB)

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**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 5:28pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/9 "2018-06-09T17:28:32Z")

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I got a twisted shape I have a problem in the curve orientation @Michael_Pryor

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**Author:** ![HS\_Kim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/hs_kim/32/473975_2.png) [@HS\_Kim](https://discourse.mcneel.com/u/HS_Kim)\
**Post date:** [June 9, 2018, 5:31pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/10 "2018-06-09T17:31:03Z")

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![capture-20180610-023007](https://global.discourse-cdn.com/mcneel/original/3X/1/f/1f0a1224e26fcc5015a513eaad7a1301c48ee8b6.png)[cross vault\_reV3.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/1/a/1a4b88aadd3c167f081e365511b1b6776fce7077.gh) (27.7 KB)

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**Author:** ![Michael\_Pryor](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/michael_pryor/32/489117_2.png) [@Michael\_Pryor](https://discourse.mcneel.com/u/Michael_Pryor)\
**Post date:** [June 9, 2018, 5:32pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/11 "2018-06-09T17:32:43Z")

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Use @HS_Kim solution, it is simpler for you. I do suggest you give this a read though, so you can understand some stuff. [https://issuu.com/pabloherrera/docs/mode\_lab\_grasshopper\_primer\_third\_e](https://issuu.com/pabloherrera/docs/mode_lab_grasshopper_primer_third_e)

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**Author:** ![Michael\_Pryor](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/michael_pryor/32/489117_2.png) [@Michael\_Pryor](https://discourse.mcneel.com/u/Michael_Pryor)\
**Post date:** [June 9, 2018, 5:34pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/12 "2018-06-09T17:34:39Z")

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That is basically what the other version is doing (except weave+loft instead of ruled) but there is is nothing in the flip curve in @immen.soussi screenshot

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<div class="post-metadata">

**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 9, 2018, 11:45pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/13 "2018-06-09T23:45:08Z")

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I’m not a professional in Rhino and gh and I’m trying to learn it for my thesis…  
I did set multiple geometries and the 2 volumes are not like when it’s just 1 geometry

 ![image](https://global.discourse-cdn.com/mcneel/original/3X/5/f/5ff22539a9d92ee4049de977a126fdffe732e299.png)

when it’s only one geometry, there is a detail that I notice in the final volume ( in the corner, the volume is not vertical and it doesn’t go until the 4 vertices)

 ![image](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/8/f/8fdc09aa645cc2f266f8fff82085c30807e344af.png)

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<div class="post-metadata">

**Author:** ![HS\_Kim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/hs_kim/32/473975_2.png) [@HS\_Kim](https://discourse.mcneel.com/u/HS_Kim)\
**Post date:** [June 10, 2018, 2:50am UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/14 "2018-06-10T02:50:37Z")

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Then… here we have another solution for you…

 ![capture-20180610-114747](https://global.discourse-cdn.com/mcneel/original/3X/7/b/7bd613409f03da61435370ad9509ba9ae85a42a8.png)[cross vault\_reV4.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/8/8/8897784b7c4e98c8a5310bbac1256399c4bdc982.gh) (34.1 KB)

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**Author:** ![HS\_Kim](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/hs_kim/32/473975_2.png) [@HS\_Kim](https://discourse.mcneel.com/u/HS_Kim)\
**Post date:** [June 10, 2018, 3:08am UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/15 "2018-06-10T03:08:13Z")

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Check this as well…

 ![Canvas%20at%2012%3B06%3B23](https://global.discourse-cdn.com/mcneel/original/3X/7/1/713787d8e0754a0ad7efc462375b21038098e095.jpg)  
[cross vault\_reV5.gh](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/a/8/a8a1868cc3352b5f0b693fa392967d7beb21b79d.gh) (53.2 KB)

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<div class="post-metadata">

**Author:** ![immen.soussi](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/immen.soussi/32/150589_2.png) [@immen.soussi](https://discourse.mcneel.com/u/immen.soussi)\
**Post date:** [June 10, 2018, 9:08pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/16 "2018-06-10T21:08:53Z")

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thank you everyone, but the problem is not resolved until now 🙂

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**Author:** ![tim.stark](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/tim.stark/32/704108_2.png) [@tim.stark](https://discourse.mcneel.com/u/tim.stark)\
**Post date:** [June 11, 2018, 5:56am UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/17 "2018-06-11T05:56:40Z")

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Why not?  
@HS_Kim has provided you a lot of possible solutions.

> [@Help Us Help You](https://discourse.mcneel.com/t/help-us-help-you/50034/1):
>
> This is not a _do-my-work-for-me_ group

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**Author:** ![j.platypi](https://avatars.discourse-cdn.com/v4/letter/j/2bfe46/32.png) [@j.platypi](https://discourse.mcneel.com/u/j.platypi)\
**Post date:** [June 17, 2018, 4:31pm UTC](https://discourse.mcneel.com/t/how-to-close-a-volume/64725/19 "2018-06-17T16:31:38Z")

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Why use Grasshopper? If you create 4 vertical planes from the sides of the rectangle that will be the base, make the planes taller than the cross vault, and then use trim or split to knock off what you don’t want. Add the base and join or union the parts and you should have a closed polysurface.