Well, I found how not to get it to crash!
In my loop over the multi indexes, which I've now turned into a
for m_id in range(multi_output_handle.__len__():
where before, I got every child output handle with:
for m_id in multi_indices:
m_child = plug.selectAncestorLogicalIndex(m_id)
output_handle = data.outputValue(m_child)
I now get the handle using:
for m_id in range(multi_output_length):
multi_output_handle.jumpToLogicalElement(m_id)
output_handle = multi_output_handle.outputValue()
So, apparently Maya didn't like me trying to get the MDataHandle of the
output[0], that's what caused the crashing when i tried setting its value.
Instead, I get the MArrayDataHandle, iterate through its length, and get
the current output handle by using .jumpToLogicalElement.
Now I just have to figure out why it always outputs zero-values, it can't
get the inputs as anything other than zero or a list of zero.
On Tuesday, April 14, 2020 at 5:07:05 PM UTC+2, Peter Jemstedt wrote:
>
> Hello everyone!
>
> I'm trying to create my first custom MpxNode for Maya, and the node keeps
> crashing on me.
> The node takes two inputs and has an integer attribute.
> The integer attribute selects which output should take the first input,
> all the other outputs will take the second input. Basically, it's a node
> that would toggle (for example visibility) on one out of many objects,
> while off on any other.
>
> Now, I also wanted the node to be more flexible, so you could toggle other
> types of attributes, like, one object gets a certain vector or color or
> whatever.
> So the two inputs and the output are generic attributes.
>
> Using Api 2.0, cuz it feels right, if that could be anything.
>
> My code as it lewks right now:
> https://pastebin.ubuntu.com/p/xbCwP85dk6/
>
> With some debuggy prints, I've noticed it can parse the whole compute
> function without crashing, it's after that it just crashes, no errors.
>
> /Peter
>
>
>
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