topic Re: Error in Esri rule files? in ArcGIS CityEngine Questions

Error in Esri rule files?

awei — Sat, 11 Dec 2021 13:56:39 GMT

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!

Re: Error in Esri rule files?

MicahTaylor — Wed, 12 Aug 2015 17:57:44 GMT

Remove the Bar after Pavement.

Re: Error in Esri rule files?

awei — Thu, 13 Aug 2015 14:27:55 GMT

yeah but that created more errors

Re: Error in Esri rule files?

MicahTaylor — Thu, 13 Aug 2015 14:34:10 GMT

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!

Re: Error in Esri rule files?

MicahTaylor — Thu, 13 Aug 2015 15:00:38 GMT

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

Re: Error in Esri rule files?

MicahTaylor — Thu, 13 Aug 2015 15:10:30 GMT

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

Re: Error in Esri rule files?

awei — Thu, 13 Aug 2015 15:15:02 GMT

Uploaded! Thank you Micah!

Re: Error in Esri rule files?

Anonymous User — Thu, 13 Aug 2015 15:46:08 GMT

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

Re: Error in Esri rule files?

MicahTaylor — Thu, 13 Aug 2015 15:52:45 GMT

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

Re: Error in Esri rule files?

DavidWasserman — Thu, 13 Aug 2015 16:55:45 GMT

It seems the sidewalk and planting textures are clashing though.

Re: Error in Esri rule files?

MicahTaylor — Thu, 13 Aug 2015 17:57:53 GMT

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 I think this may be an out-of-date/ flawed version.

Re: Error in Esri rule files?

awei — Thu, 13 Aug 2015 18:15:45 GMT

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.