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Zeno Pelgrims avatar image
Zeno Pelgrims asked ·

Required AOVs in AiRawDriverInitialize();

Hi,


I'm wondering what the "required aovs" in a raw driver actually does.


I usually fill it in like a good citizen of the arnold universe:

static const char *required_aovs[] = {"RGBA RGBA", "VECTOR P", "FLOAT Z", "RGBA transmission", NULL}; AiRawDriverInitialize(node, required_aovs, false);


However, it doesn't make a difference if I remove the required aovs. So I was wondering what the purpose of this is. The API docs simply say:



NULL-terminated array of AOV descriptors ("TYPE name") to route to this driver


Thanks lads

Z

apiraw driversdk
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Stephen Blair avatar image
Stephen Blair answered ·

@ You should be able to access any AOV that is generated by any driver.
The required_aovs is for ensuring that Arnold generates the AOVs needed by the raw driver, even if no other driver generates them.

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cheers stephen, thanks for clarifying

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Stephen Blair avatar image
Stephen Blair answered ·

You can remove the required AOVs and still access them?

And they are not output by for any other driver?

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Yes, I can remove them and still access them. They are output by another driver currently (both exr_driver and a custom one).
However, I cannot access the AOVs if linked to the exr_driver only (regardless of specification in the required_aovs)

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