Hi All, My objective is to produce a correctly ordered and directed sequence of lines. The input lines have draw / selection order that is random and line directions are also inconsistent. I also input the start point of the sequence of lines. [C3D_SortLineOrderByNearest_concept] Problem: The l…

The biggest benefit of design script is that you RARELY need a for or a while loop, as the tool will iterate over a list for you. The exceptions to this are situation where an action has to be performed repeatedly until a condition is met. In your case it likely could be done via a custom node witho…

This might be relevant to your interests: [image] Sort 3D lines so they can be joined eventualluy Revit This bit of Python might help get things sorted for you @ning.zhouHNQLJ EDIT: Updated this python to deal with obscenely short curves #####################…

Awesome! Thank you, @jacob.small :heart_exclamation: I will give that a try later. However, I need to use For / While loops for some other tasks, so I need to learn why my loops don’t work.

[image] jacob.small: As a general rule when writing imperative code: Once you start imperative code you cannot use associative methods anymore. This means no lacing or list levels will work - you have to specify the for loops directly (like I did in the Python). Once you enter imperative code …

Syntax problem of For / While loops or Imperative block

DesignScript

jacob.small April 17, 2026, 11:28am 2

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Syntax problem of For / While loops or Imperative block

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