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!

[MicahTaylor]

Remove the Bar after Pavement.

[awei]

yeah but that created more errors

[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]

Uploaded! Thank you Micah!

[MicahTaylor]

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

[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=863f4e7139...

[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]

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 · Accepted solution]

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