topic Re: Weird CGA rule: How does this work? in ArcGIS CityEngine Questions

Weird CGA rule: How does this work?

PhilDesrosiers — Thu, 07 Apr 2016 14:33:09 GMT

Poking around in the "Pompeii" example , I found this line in pompeiiStreets.cga (line 55):

split(x){ stoneLength*rand(0.8,1.2): Stone | RollingStones }

I'm pretty new to CGA in general, but the docs on the split operation don't mention the possibility of a successor block without a size (as in "RollingStones" above). What will happen when this line runs? Is "RollingStones" just the shape successor for "all the remaining geometry" after the split?

Re: Weird CGA rule: How does this work?

LR — Fri, 08 Apr 2016 13:26:22 GMT

Must be old code, that doesn't work anymore. It should be ~1: RollingStones.

Re: Weird CGA rule: How does this work?

CherylLau — Mon, 11 Apr 2016 09:28:18 GMT

I downloaded the code from the link you sent (and also from within CE by going to Help -> Download Tutorials and Examples), but I have something different on line 55. The code you mention appears on line 98 instead, and it has a ~1 as Z R mentioned.

split(x){ StoneLength*rand(0.8,1.2): Stone | ~1: RollingStones }