How to extrude crv by surface's normal vector and have random length?

I want to make A, B, C, D have different length, that can help me to optimize it.
and I have to make them on the windows because they are the shadings, Please Help Me ~! (47.7 KB)

I am unable to download the attachment.

1 Like

thank you for your remind! I upload it again.

I think this is what you try to achieve. Use tree statistics to get the number of branches. (51.9 KB)

1 Like

thank you so much! I’ll try to know what can tree statistics can do !~