nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Error in Esri rule files?

awei

Seems there're errors in City Engine Essential Skills Training project/Essential_street.cga. Specifically, these few lines:

PlantingLayout -->
  case lenAlongV > 2 && lenAlongU > 8  && heightOverTerrain < 2:
  split(u,unitSpace,0)
  {
  Crosswalk_width * 2: Pavement | 
  split(v,unitSpace,0)
  {
  Planting_Width : split(u,unitSpace,0)
  { 
  Planting_Length  : PlantingOrPavement | { Planting_Spacing:  Pavement | Planting_Length : PlantingOrPavement }* | ~1 : Pavement
  } 
  | ~1 : Pavement
  }
  | Crosswalk_width * 2: Pavement
  }
  else :  Pavement

Am I mistaken? If there're errors, how do I fix that?

Thank you!

Essential_Street.cga.zip

Esri-Training-UC24-Events-Activities.docx

Screenshot 2025-09-15 180045.png

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Accepted answers

MicahTaylor

Try the rule now (attached)...I was able to generate the following with this rule (image)

Essential_Street2.zip

Explorer.PNG

All comments

awei

Hey Chris,

Thanks for the reply. I downloaded the rule from this #6 CityEngine Essential Skills: Importing Streets - YouTube

From the link from that video.

MicahTaylor

Yes, and there is an unused median rule in the file as well. I think this may be an out-of-date/ flawed version.

DavidWasserman

It seems the sidewalk and planting textures are clashing though.

MicahTaylor

Try the rule now (attached)...I was able to generate the following with this rule (image)

Essential_Street2.zip

Explorer.PNG

Anonymous User

a wei,

Can you provide a link to the place where you downloaded the code? I can see several errors, but I'd like to see the publically posted version, so I can correct it before others download it.

One thing that seems to be happening here is that there was a change in CGA, so the inside of splits, everything separated by pipes must have a length specified.

Part of the old code shown above, which worked in older versions:

split(u,unitSpace,0) { Crosswalk_width * 2: Pavement | split(v,unitSpace,0) { ...

Must change to have a length in both parts, like this:

split(u,unitSpace,0) { Crosswalk_width * 2: Pavement | SomeValue: split(v,unitSpace,0) { ...

SomeValue could be:

~1 (means just whatever space is left. this is easiest fix)

'0.5 (means relative 50%)

123 (a literal value)

something * somethingElse (a calculated value like Crosswalk_width * 2, as seen above)

So this is just one error I noticed. More might be there. Please send link to download where you got this if possible.

Thanks!

Chris

awei

Uploaded! Thank you Micah!

MicahTaylor

Also, here is a link to the Complete_Street rule. It offers many more options and will most likely be of more use to you.

https://community.esri.com/external-link.jspa?url=http://www.arcgis.com/home/item.html?id=863f4e7139314101a5cee1d7cde079d9

MicahTaylor

Try adding this asterisk...This will run this line of code for the entire sidewalk until it ends that segment.

MicahTaylor

Hmm. This seemed to fix the error in my code. I know we are using the same file, but could you upload your Essential_Street.cga so I can use it? I might be able to see what is different about your copy.

Thanks!

awei

yeah but that created more errors

MicahTaylor

Remove the Bar after Pavement.

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