Thanks for your help and ideas Abigail and Jonathan. Looks like Jonathan was
right about the way things are being calculated, so I must have been doing
things slightly wrong when I tried to duplicate his instructions. Everything
seems to be OK now though (using a custom per-view hash).
-Nathan
-----Original Message-----
From: Abigail Brady
Sent: Wednesday, June 15, 2011 2:44 AM
To: Nuke plug-in development discussion
Subject: Re: [Nuke-dev] Write::getHashOfInputs() vs. Op::hash().getHash()
Hash Write::getHashOfInputs()
{
Hash inputHash;
if ( inputs() > 1 ) {
// split input ( eg. stereo )
for ( int i = 0 ; i < inputs(); i++ ) {
inputHash.append( input(i)->hash() );
}
}
else {
inputHash = input0().hash();
}
return inputHash;
}
HTH.
On Tue, 2011-06-14 at 11:52 -0700, Nathan Rusch wrote:
I’m trying to make use of the “nuke/node_hash” metadata value in
written EXR sequences. In my plugin, I’m fetching the value from the
metadata stream of input1() and comparing it to the hash returned by
input0().hash().getHash().
This all works fine for mono comps; if I write out a comp at a certain
point and then read it back in, the hash my plugin reports for the
tree matches the hash embedded in the written EXR’s metadata.
However, as soon as multiple views are introduced, everything breaks.
Looking over the exrWriter source, it’s using Write::getHashOfInputs()
to fetch the hash that gets embedded in the metadata. This doesn’t
ever match the Op::hash().getHash() return value in stereo situations
(which doesn’t vary per-view unless a split knob is changed for that
view, even when I append outputContext().view() to my plugin’s hash).
So my question is, what is Write::getHashOfInputs() doing differently
to fetch its hash? Is there anything I can append to my plugin’s hash
to get it to match the getHashOfInputs() return? Or are my only
options to A) invent my own metadata hash that I can control or B)
compile my own modified exrWriter that embeds what I want? This has me
righteously stumped, so I would really appreciate any ideas.
Thanks,
-Nathan
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Abigail Brady, Senior Architect
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