yes, that's how I can do it and probably will (happy to use your setup in stead of reinventing the wheel). I did send in a feature request to have a DeepToPosition node though (though it should probably be a "DepthToPosition" node seeing you don't need deep for this)

On 20/11/12 4:39 PM, Michael Garrett wrote:
If you're just trying to create a regular "flat" position pass, can't you just flatten deep.front and then use a regular Nuke Expression node plus the Camera matrix to convert that to position? I can send you the setup if you need it.

I've gone over the expressions required to convert a deep opacity file to deep position (position render as deep data) and as we know, the DeepExpression node doesn't support some things yet.


On 19 November 2012 01:27, Patrick Heinen <mailingli...@patrickheinen.com <mailto:mailingli...@patrickheinen.com>> wrote:

    Ok, i thought you wanted to use the DeepExpression node to
    calculate those xyz coordinates, which as you say would be
    possible, but not comfortable. Yes Deep is always camera relative,
    that's the drawback with it. But as the DeepToPoints node exists,
    you're right that it shouldn't be to complicated to write a deep
     to point position node.
    +1 for the feature request, maybe it makes it into the releas
    *hope* ;)

    cheers,
    Patrick

    ----- Original Message -----
    From: fr...@beingfrank.info <mailto:fr...@beingfrank.info>
    To: nuke-users@support.thefoundry.co.uk
    <mailto:nuke-users@support.thefoundry.co.uk>
    Date: 19.11.2012 02:42:30
    Subject: Re: [Nuke-users] deep position in DeepExpression?


    > Hi Patrick,
    >
    > x and y only give you screen space positions, not world positions.
    > With the camera and depth available obviously this can be
    converted to
    > world position, but I'd really like to see a built in solution.
    > Basically like the DeepToPoints but a DeepToPosition.
    >
    > The brute force way would be to render a full resolution DeepToPoint
    > through the ScanlineRender node and generate positon vectors in
    it. But
    > that is stupidly slow and really shouldn't be necessary.
    >
    > Will send in a feature request.
    >
    > Cheers,
    > frank
    >
    > On 19/11/12 11:41 AM, Patrick Heinen wrote:
    >> Hi Frank,
    >>
    >> you should be able to acces x and y with x and y. I was at
    least able to produce a uv map, if that's the kind of funcionality
    you're somehow looking for. However the Deep Expression Node is
    not working exactly as the Expression Node. This came up on the
    mailinglist and there is a feature request logged for expanding
    the deep expression node to match the functionality of the
    expression node #27372.
    >> Tell me if you succeed in your attempt of creating a world
    position pass, I would really be interested in that.
    >>
    >> cheers
    >> Patrick
    >> Am 18.11.2012 um 21:58 schrieb Frank Rueter:
    >>
    >>> Is it possible to get a pixel's position in a DeepExrpression
    node? I am trying to create a world position pass from the image
    and the associated camera.
    >>>
    >>> Cheers,
    >>> frank
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