How do you get reference do the currently active sketch (Python)??

[Anonymous]

I want to write a script that runs in the currently active sketch. So, in the UI I want to activate any sketch I want to on any plane or face I want to, so *I* will manually get the UI into sketch mode, and then I want run my script to let it drawing new lines in the sketch.

So, what's the API reference access "the current sketch"?

[BrianEkins · Accepted solution]

You want to use the activeEditObject property of the Application object.

[JesusFreke]

I think Application.activeEditTarget is what you're looking for.

Also, you might consider using UserInterface.selectEntity

[Anonymous]

Should I be able to find activeEditObject on the API Object Model pdf???

https://help.autodesk.com/cloudhelp/ENU/Fusion-360-API/images/Fusion.pdf

[JesusFreke]

It looks like that chart only has Objects, not methods.

If it had every method of every object, it would be enormous 🙂

[erik]

As @JesusFreke writes, it is for objects in the different areas of the Fusion API. So no, you shouldn't be able to find a property of an object in the API Object Model.

I would refer to the Fusion API where one can find every object along with its methods and properties under Programming Interface -> Fusion 360 API Reference Manual -> Objects.

Here you can find the Application object with its property activeEditObject.

I hope this answers your question.

Btw, please mark one or more answers as the solution if they answered your question so others can use this thread for reference.

Cheers,

Erik

[Anonymous]

Thanks! This is a very helpful resource. 

It is clear that the full API of Objects, Methods, and Properties of the Fusion 360 platform is non-trivial. It is a complex model, understandably, and one must simply invest many hours to become versed in this programming area.  I would have scoured the docs a LOONG time to find this reference. It sure helps to have humans who are a few steps ahead to pass along this knowledge. Eventually, the student (me) will gain some insight and hopefully intuition to discover things on their own more easily.

[erik]

You are absolutely right, the API is complex and it can take some time to get used to using it as a reference book and search for information.

I strongly recommend you continue to ask questions here on the forum if you are ever in doubt how to get some information or do a specific task in Fusion 360. I have gained a lot of knowledge from browsing the forum and asking questions myself.

- Erik

[Anonymous]

For others learning from this thread, to get an actual reference to the "current sketch" using this property, you have to "cast" to activeEditObject to a Sketch object, using the adsk.fusion.Sketch.cast() method.

        # Get current sketch
        app = adsk.core.Application.get()
        sketch = adsk.fusion.Sketch.cast(app.activeEditObject)

[JesusFreke]

No, you don't have to cast it 🙂

Here's a quick test, in a document with an active sketch:

import adsk.core
import adsk.fusion


def run(_):
    sketch = adsk.core.Application.get().activeEditObject
    print(sketch)
    print(type(sketch).__name__)

    sketch = adsk.fusion.Sketch.cast(sketch)
    print(sketch)
    print(type(sketch).__name__)

Which results in:

<adsk.fusion.Sketch; proxy of <Swig Object of type 'std::vector< adsk::core::Ptr< adsk::fusion::Sketch > >::value_type *' at 0x000001CFA6ABC300> >
Sketch
<adsk.fusion.Sketch; proxy of <Swig Object of type 'std::vector< adsk::core::Ptr< adsk::fusion::Sketch > >::value_type *' at 0x000001CFA6ABC300> >
Sketch

As you can see, the object was already a sketch before the cast.

Furthermore, you can take a look at the implementation of the cast method itself. i.e. in <Autodesk>\webdeploy\production\<GUID>\Api\Python\packages\adsk\fusion.py

Sketch.cast = lambda arg: arg if isinstance(arg, Sketch) else None

As you can see, it just returns the unmodified argument, as long as it is a sketch, of course.

Since Application.activeEditObject could be different types of objects, it's best to do a type check on it before using it. You could use Sketch.cast() and check the return value for None, or just do the isinstance check directly yourself.

[dzid_]

I am getting:

active_sketch = adsk.core.Application.get().activeEditObject

print(active_sketch)
<adsk.fusion.Sketch; proxy of <Swig Object of type 'std::vector< adsk::core::Ptr< adsk::fusion::Sketch > >::value_type *' at 0x000001729C61E030> >

The sketch is opened.