Re: [Nuke-users] reference camera data with expressions

Erik Winquist Thu, 11 Aug 2011 18:51:59 -0700

pretty slick workaround, michael.

nice one.

erik

Michael Garrett wrote:

I got something working that seems to enable metadata in the camera pipe. So you could add this right after the camera, where you don't need a Dot to keep things clean, then access camera values via metadata. Not ideal, but it could be helpful:

set cut_paste_input [stack 0]
version 6.2 v1
push $cut_paste_input
Group {
name AddCamMetaData
selected true
xpos -152
ypos -129
addUserKnob {20 User}
addUserKnob {41 shownmetadata l "" -STARTLINE T ViewMetaData2.shownmetadata}
}
Input {
inputs 0
name Input1
xpos 61
ypos -238
}
ModifyMetaData {
metadata {
{set focal "\[value parent.input0.focal]"}
}
name ModifyMetaData1
selected true
xpos 61
ypos -176
}
ViewMetaData {
name ViewMetaData2
xpos 61
ypos -150
}
Output {
name Output1
xpos 61
ypos -40
}
end_group
Blur {
size {{"\[metadata focal]"}}
name Blur3
selected true
xpos -152
ypos -103
}

On 11 August 2011 14:59, Michael Garrett <[email protected]> wrote:

Hi Ivan, great, thanks! I was just trying Camera1.focal

On 11 August 2011 14:47, Ivan Busquets <[email protected]> wrote:

Hi Michael,

You can use tcl expressions in the "value" field of a ModifyMetadata node.

ex:
[value Camera1.focal]

On Thu, Aug 11, 2011 at 2:40 PM, Michael Garrett <[email protected]> wrote:
> Do you mean _expression_ link to the modifymetadata "value" field? How
> exactly do you do this?
>
> On 11 August 2011 14:36, Frank Rueter <[email protected]> wrote:
>>
>> You can _expression_ link a camera's parameter to generically create meta
>> data. But of course this creates the same problem. It would be good to have
>> multiple inputs for the ModifyMetadata node that allows any type of input
>> type to do this sort of thing (I guess input 0 would be the type being
>> passes through like a copy node)
>>
>>
>> On Aug 11, 2011, at 1:20 PM, Paul Raeburn <[email protected]>
>> wrote:
>>
>> I wondered about that, but metadata node dont work in camera pipes, so I
>> ran into a dead end. Getting the name of the camera node node world be
>> great (as per Ivans recommendation). Ideally it would be great to et the
>> data from the camera pipe directly, so it can be modified by downstream axis
>> etc, but I assume that a foundry question.
>> Any suggestions on how to access the metadata of the camera pipe?
>>
>> On 12 August 2011 05:51, Frank Rueter <[email protected]> wrote:
>>>
>>> Try "[topnode]" which will give you the top most node of a stream.
>>> Obviously it won't work if the camera's parent pipe is connected. In that
>>> case you will need a script that walks upstream and returns the first camera
>>> node, then use that in your _expression_. Or use meta Data to make the camera
>>> info flow in the stream which is more elegant and probably faster.
>>>
>>>
>>>
>>> On Aug 10, 2011, at 8:24 PM, Paul Raeburn <[email protected]>
>>> wrote:
>>>
>>> >
>>> > We have been using references tot he input node and then values to get
>>> > values from a camera node. ie. NoOp1.input.focal
>>> >
>>> > This works fine but breaks if there is anything in between the NoOp and
>>> > the camera, so you can tidy up the script with Dots or end up with multiple
>>> > cameras just to be tidy.
>>> >
>>> > Is there a way to get camera stream directly, or even the name of the
>>> > camera node from the stream?
>>> >
>>> > thanks
>>> >
>>> > Paul Raeburn
>>> > _______________________________________________
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-- 
erik winquist
weta digital

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Re: [Nuke-users] reference camera data with expressions

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