Missing from Maya devkit MDagMessage::addMatrixModifiedCallback

[negow]

Putting this here for the next person searching for a missing devkit member. Missing from 2018, 2019 and 2020 devkits for both Windows or Linux.

- help.autodesk.com/view/MAYAUL/2020/ENU/?guid=__cpp_ref_class_m_dag_message_html#abf57819e7ef5d1badcc6adff5ba3f273

[brentmc]

Hi,

What exactly do you mean by "missing"? Are you referring to the documentation or something else?

Thanks.

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Brent

[negow]

Sorry, I mean the documented member is missing from maya/MDagMessage.h

Here's a visual to clarify. 🙂

[brentmc]

Hi,

That method was introduced in an update release so if you didn't download a new DevKit that would explain why it is missing.

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Brent

[negow]

Hm, that doesn't sound right. It's documented since 2019, and is missing from 2020.2.

- help.autodesk.com/view/MAYAUL/2019/ENU/?guid=__cpp_ref_class_m_dag_message_html#abf57819e7ef5d1badcc6adff5ba3f273

Do you mean it got removed in 2020, and re-added in 2020.3 and above? Mind you, it is missing from 2019.3 as well.

Edit: Earliest I can spot it is in the devkit for 2021.pr118, if that helps!

[brentmc · Accepted solution]

Hi,

That method was added in 2020.3. I know because I added it. 🙂

I think the 2019 doc entry is an error. I'm checking on why that is listed...

It is a brand new method that was added to supplement addWorldMatrixModifiedCallback which only picks up changes in parent matrices. If you add that to a transform you will not get called when the transforms matrix changes so we added a new callback for that case.

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Brent

[negow]

Great, case closed. 🙂 That also reflects what I was hoping to get out of the callback. Would be great with a note in the docs about when it got added. I really like the deprecation notes with mention of specific versions.

[brentmc]

The 2019 docs have been corrected now. (if you flush your browser cache)

Thanks.

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Brent