# Intersection Points

**URL:** <https://forum.dynamobim.com/t/intersection-points/92395>\
**Category:** Revit\
**Tags:** revit, python, geometry, dynamo\
**Created:** [August 1, 2023, 7:48am UTC](https://forum.dynamobim.com/t/intersection-points/92395 "2023-08-01T07:48:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vishalghuge2500](https://avatars.discourse-cdn.com/v4/letter/v/7ea924/32.png) [@vishalghuge2500](https://forum.dynamobim.com/u/vishalghuge2500)\
**Post date:** [August 1, 2023, 7:48am UTC](https://forum.dynamobim.com/t/intersection-points/92395/1 "2023-08-01T07:48:34Z")

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![Family # Placement via AutoCAD_2023-08-01_01-21-08](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/0/909f4f67dfb1ee3d340cb47b596e4e1eca952160.png)  
 ![Screenshot 2023-08-01 124241](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/3/b/3b95d4c65d85ebbb4d56c4e4d80fe3416c0d02d2.jpeg)  

[https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/7/17045a85e4da3b1959dac47a13429e863c8027e9.mp4](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/7/17045a85e4da3b1959dac47a13429e863c8027e9.mp4)
  
hi everyone, I’m trying to get these intersection points.  
surfaces are from linked files & lines are created in dynamo by points.  
Im planning to place families at intersection points

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**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\
**Post date:** [August 1, 2023, 7:53am UTC](https://forum.dynamobim.com/t/intersection-points/92395/2 "2023-08-01T07:53:30Z")

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This might help if you extrude your surfaces into a solid.

[https://dictionary.dynamobim.com/#/Geometry/Solid/Action/ProjectInputOnto](https://dictionary.dynamobim.com/#/Geometry/Solid/Action/ProjectInputOnto)

Or you could union the surfaces into a Polysurface and use a Geometry.Intersect node… lots of options here actually.

You could also do use a RayBounce method to get the points and circumvent pulling geometry out of the file.

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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:** [August 1, 2023, 9:41am UTC](https://forum.dynamobim.com/t/intersection-points/92395/3 "2023-08-01T09:41:56Z")

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Looks more in your graph you intersect solid against curves it should give curves…and seems what it does, here you could take the endpoint-startpoint or use point at parameter 0-1…yeah lots of options here

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**Author:** ![vishalghuge2500](https://avatars.discourse-cdn.com/v4/letter/v/7ea924/32.png) [@vishalghuge2500](https://forum.dynamobim.com/u/vishalghuge2500)\
**Post date:** [August 1, 2023, 9:45am UTC](https://forum.dynamobim.com/t/intersection-points/92395/4 "2023-08-01T09:45:05Z")

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Yes thank you  
Curve.startpoint

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/3/93a7e12b40a8b976ed718efb2068b55b4727bce7.png)