topic Re: Need to add delay before running ce.generateModels? in ArcGIS CityEngine Questions

Need to add delay before running ce.generateModels?

RobertYu — Mon, 10 Apr 2017 23:30:45 GMT

Hello,

I am doing the following all in python:

Associate a rule file with a shape
Generate the model
Create an new rule file
Associate the new rule file with the shape

But when I try to regenerate the model using the new rule file, it seems to fail unless I put a delay in front, as in:

time.sleep(10)

shapes = ce.getObjectsFrom(ce.scene, ce.isShape)

ce.generateModels(shapes)

Is there a reason why the delay is needed? I might be doing something wrong here.

Thanks,

Robert

Re: Need to add delay before running ce.generateModels?

LR — Tue, 11 Apr 2017 12:00:32 GMT

That's probably because CE is still busy with the first model generation. Try ce.waitForUIIdle().

Re: Need to add delay before running ce.generateModels?

RobertYu — Wed, 12 Apr 2017 00:07:08 GMT

Thanks for the suggestion. I gave it a try it works a bit better. I ended up doing a hack, where

I estimate the wait delay based on how many buildings (collada) I need to redraw.

def framewait(delay=0😞

print "Waiting", delay, "seconds ..."

time.sleep(delay)

views = ce.getObjectsFrom(ce.get3DViews())

views[0].frame()

ce.waitForUIIdle()

print "frame finished"

Re: Need to add delay before running ce.generateModels?

LR — Wed, 12 Apr 2017 08:35:54 GMT

Have you looked into @noUIupdate and ce.generateModels ( --> asynchronous)? Those might help as well.

Re: Need to add delay before running ce.generateModels?

RobertYu — Wed, 12 Apr 2017 18:06:31 GMT

I upload the results to arcGIS online, so I do need the model to be complete. With @noUIUpdate and asynchronous, how can I tell when the models are ready for upload?

Re: Need to add delay before running ce.generateModels?

RobertYu — Sat, 15 Apr 2017 15:50:16 GMT

From trial and error, it looks like whenever you associate a .cga with a shape,

one should add a bit of delay to it, as in (function "framewait" defined in earlier post)

ruleFile = "rules/foo.cga"

ce.setAttribute(zone, "/ce/rule/ruleFile", ruleFile)

framewait(2)