topic Re: Specify the value of RandomSeed in the CGA in ArcGIS CityEngine Questions

Specify the value of RandomSeed in the CGA

biaozeng — Fri, 15 Aug 2025 03:02:47 GMT

I hope to specify the value of RandomSeed in the cga. I have tried to assign values to seedian and rand, but found that neither of them can cover the global random value.

Re: Specify the value of RandomSeed in the CGA

biaozeng — Fri, 15 Aug 2025 03:08:45 GMT

I created fixed random values for each shape within the region. I hope to use these values to overwrite RandomSeed to maintain their consistency.

Re: Specify the value of RandomSeed in the CGA

JonasObertuefer — Wed, 03 Sep 2025 09:44:45 GMT

Hi @biaozeng,

you can set and read the Random Seed in CGA using the seedian shape attribute

print(seedian) set(seedian, 2137) print(seedian)

Please note: The seedian is equal to the Random Seed up to certain value, negative and very high positives Random Seed values are mapped to the allowed range in CGA.

Hope this helps.

Best,
Jonas

Re: Specify the value of RandomSeed in the CGA

biaozeng — Thu, 04 Sep 2025 03:03:32 GMT

It cannot change this value.

Re: Specify the value of RandomSeed in the CGA

JonasObertuefer — Thu, 04 Sep 2025 12:09:01 GMT

You can't change any inspector values including the Random Seed from CGA. If you you wish to set it to a certain value you can do it in the Inspector by editing the value in the input field directly or you use python with ce.setSeed()