topic Re: Can I prevent automatic model generation when changing user attributes with python? in ArcGIS CityEngine Questions

Can I prevent automatic model generation when changing user attributes with python?

LR — Sat, 11 Dec 2021 15:37:43 GMT

I'm trying to change an attribute in a bunch of shapes and then generate all the models at once after the shapes had their attribute set. However CE generates each model separately while running through the loop, resulting in a rather slow process. Can I somehow prevent this?

My code:

    shapes = getObjectsFrom(ce.selection, ce.isShape)
    for shape in shapes:
        ce.setAttributeSource(shape, "/ce/rule/someAttribute", "USER")
        ce.setAttribute(shape, "/ce/rule/someAttribute", "hello")
    ce.generateModels(shapes, False, True)

Re: Can I prevent automatic model generation when changing user attributes with python?

ThomasFuchs — Sat, 11 Dec 2021 15:37:46 GMT

Yes, this is possible!

Python Scripting Interface Reference

noUIupdate(f)Decorator to mark a function as non-UI updating. By decorating a function with @noUIupdate: the function will be executed on the UI thread thus preventing UI updates.Note: # mark setAttributes() to run faster without UI updates

@noUIupdate
 def setAttributes():
     for shape in ce.getObjectsFrom(ce.selection, ce.isShape):
          ce.setAttribute(shape, 'height', 15)

 if __name__ == '__main__':
      setAttributes()

Re: Can I prevent automatic model generation when changing user attributes with python?

LR — Wed, 30 Mar 2016 22:57:20 GMT

Great, thanks.