Strings In Read-filenames And Other Things

[eindoppelganger]

Hello,

as I have quite a bunch of shots that always use pretty much th same setup again and again, just with different 3D-renderings, I was trying to setup a script that allows one to enter a vfx number and then generates all reads for all passes using a file structure like /shots/vfx060/passes/diffuse/vfx060_diffuse.%04d.exr and-/shots/vfx060/passes/spec/vfx060_spec.%04d.exr and so on.....hope you get the idea.

So, I tried to setup a script (once again, really poor skills in that matter, at least so far...) that you can input a number and then this number is put as a string into the readers, eg.

/shots/vfx$number/diffuse/vfx$number_diffuse.%.04d.exr

but can't get it to work..... So annoying to always read-in all 3d-passes, steppping through all the directories....arggghh

Anybody out there that can help me?

Cheers, michi.

Oh, and some more: What are you guys using to correctly distort 3d-renderings with the lens distortion of a plate? Lookin' for something like the "lenswarp"-tool in shake, but in Nuke there seems to be this one-paramter-slider "perspDstort" only - so, I'm kinda curious 'cause to me, it always seems to be a compromise between correcting the horizontal or the vertical distortion with that thing...

Btw, is there also some kind of index which nodes concatenate (transformational-and colorwise) in Nuke and which do not?

[user_deleted]

you can set up a user knob in either an extra node (i.e. NoOp node) or even in the root's script settings.
Then link to it from the Read node's file field.

Example:

Create a NoOp node, right click in it's panel and select Manage User Knobs.
Create an integer knob and call it something like "vfxNumber" (without the quotes).

Then in the Read nodes' file knobs use something like this:

/shots/[value NoOp1.vfxNumber]/diffuse/[value NoOp1.vfxNumber]_diffuse.%.04d.exr

You could use [knob NoOp1.vfxNumber] as well but using 'value' instead of 'knob' will always return a number even if the there is an expression in the vfxNumber knob.

cheers,
frank