[image] If I want red as an out put from the closed curves. what should I do

Far better for lines and arc geometry is [image] It will give quite exact skeleton for a roof skeleton [image] [image] roof skeleton.gh (6.4 KB)

Try Nautilus plug in and its medial axis components they do exactly that. [image] [image]

if you want perfectly straight lines though, as you are showing on the picture, i do not know any simple way. Only making geometrical algorithm for your specific case

Ya I want straight line . Nautilus is not working

Then you have to share more information about your project for people to be able to help

This topic might be helpful: [image] Straight Skeleton "Implementation" Grasshopper Hi, lately I been searching for a way of generate the Straight Skeleton of a polygon, but I haven’t been able to find any examples on how to implemented, for what I been able to…

Thank you so much for help. This Forum is actual fun :smiling_face_with_three_hearts:

This component calculating all other stuffs that is why it is taking too much time for giving output is there any other way :smiling_face_with_tear:

It calculates using brep intersection. It is rhinocommon calculations so there is no big room for improvement. The others uses points and voronoi but are not very clean for your geometry. So at my level I have no better solution. The improvement that could be done is the extend curve a bit smarte…

[image] Snehal Raut: what should I do First, always upload your file :wink: Second, not saying what you should do, just showing what I did for your shape type: mid-lines.gh (17.2 KB) [image] [image]

How to create ridge line in grasshopper

Grasshopper

DanielPiker (Daniel Piker) February 26, 2026, 10:15am 7

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How to create ridge line in grasshopper

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