topic Get split.index of a certain segment in ArcGIS CityEngine Questions

Get split.index of a certain segment

ViDi — Sat, 12 Nov 2022 16:24:22 GMT

Hello,

I am trying to get a split.index of an intersected shape (red in picture) in order to use it later as a trigger for deleting all segments that are going after the trigger. I am planning to use this algorithm for X and Z axes as well, so height-related solutions are not suitable for me.

I tried to get the value of this particular (red) segments of splitted extrusion by setting them to attribute, but this didn't work. I am a total newbie, so maybe there is something important in work with indexes and attributes that I am missing? Or is it impossible in general?

Thanks in advance!

attr CellSize = 50 @Hidden attr CellID = 0 @Hidden attr totalCellNR = 0 @Hidden attr badCell = 0 EndMass --> label("stop") color(1,1,0) Lot --> extrude(CellSize*10) split(y) { ~CellSize : Split }* Split --> set(CellID, split.index) set(totalCellNR, split.total) Check Check --> case minimumDistance(all,"stop") == 0 : color(1,0,0) label("theEnd") set(badCell, split.index) else : X. Delete --> case badCell < CellID : NIL else: X.

Re: Get split.index of a certain segment

Houskan — Fri, 02 Dec 2022 10:16:51 GMT

Hi ViDi,

You try to use the attribute badCell as global variable to exchange information between shapes. Unfortunately, this is not possible. If you set an attribute, this value is only applied to the current shape and its successors.

Maybe you can achieve the same thing differently using the resetGeometry function:

attr CellSize = 50 EndMass --> label("stop") color(1,1,0) Lot --> extrude(CellSize*10) split(y) { ~CellSize : Check }* Redo(badCellIdx) --> resetGeometry extrude(CellSize*10) split(y) { ~CellSize : Delete(badCellIdx) }* Check --> case minimumDistance(all,"stop") == 0: t(0,'-1, 0) CheckIsLowestIntersection else : NIL // so we only Redo once. CheckIsLowestIntersection--> case minimumDistance(all,"stop") == 0: NIL else: Redo(split.index) Delete(badCellIdx) --> case badCellIdx < split.index : NIL else: X.

Let me know if that helps.

Best,

Niklaus

Re: Get split.index of a certain segment

ViDi — Sun, 08 Jan 2023 00:06:52 GMT

Hi Houskan,
Thank you for your suggestion! However, we decided to try to achieve the same result it in totally another way. I am sorry that we missed an occasion to try your code. Hope it helps somebody in the future.