simple questions

[Tocy]

Hi!
I have several questions again, as i learn Nuke more, maybe someone can answer these:
1. how can I put motion blur to bezier rotomasks? I mean other than applying an optiflow node...
2. How can I call an expression that reads values of a node on another frame. For example I would like to get the translation difference of a tracker node between the actual and the previous frame (or next).
Thats it for now, more to come...
Thank you:
T

sorry, I solved the second one, reading the previous thread. Next I have to be a bit more careful. If someone is looking for something like this, the formula is:
Tracker2.translate.x-Tracker2.translate.x(frame-1)
Sorry again, I was looking for something with value/curve expressions...

[hugo_guerra]

Hi, to make Motion Blur in bezier masks, just pipe a "TimeBlur" node, and blur the hell out of it with the sutter speed.

Any Transform node also can be blured this way.

All of best

[nathan]

Transform nodes you can hook up to Filter/MotionBlur2d nodes as well. This will generate uv vectors to which you can then pipe the MotionBlur2d node into a Filter/VectorBlur node.

[Diogo Girondi]

Just remember to add a NoTimeBlur node right before the masks when using the TimeBlur otherwise it will blur all the channels and not just the ones which your beziers are acting on.

For transforms I think the method nrgy described is best in most cases.

[Tocy]

Ah, time blur. Thanks for everybody for the replies. I knew about the motionblur2d/vectorblur method, I just couldn't pipe the beziers to motionblur2d node...
Thanks
T.

[Tocy]

Me again, and my stupid questions, sorry for that. I've been testing nuke for a while now, and I have more (questions)
1. Can I display on merge nodes the actual names (as is in the node tab, if I rename it), not only over/in/multiply...?
2. Is there a way to get quickly the size of the actual node without displaying it, something like a tooltip in fusion, or shake infoline? (or maybe with some tcl?)
3. Creating mask channels, and piping into another branch using a shuffle copy, is there a way to leave a channel as it is? For example I have a masklayer, with 2 existing maskchannel, along with the usual rgb. I need to pipe in an alpha from another branch, to this masklayer as a third channel. What can I do to not change the other 2 existing channel? Or I have to put it on separate layer? By the way how can I save the all other layers/channels after using the shuffle copy? Seems to erase anything else, or am I doing something wrong?
Thank you very much:
T

[rueter]

1. no. it's a feature . just use the label for that.
you can link the label to the node name by typing:

[value name]

2.you can hit 'n' on a selected node to get a quick edit field but you'll have to hit esc to close it again so it's not quite as elegant for display only. it would be possible to do some tcl for that but that would pop up a window that you have to close as well.
The following would print the name into the terminal which, if it's behind your Nuke UI, isn't very handy either:
[CODE]puts [value [selected_node].name][CODE]
It would be nice to have tooltips in the DAG which, I believe, has been discussed but maybe another feature request mail could help.

3.not quite sure what you mean. if you have a layer with two channels and copy in a third one it shouldn't alter any existing channels. As for the shuffle copy node, it should preserve all channels of input 2 that aren't over written with data from input 1 in the ShuffleCopy node. To be honest, I never use the shuffle copy node, the Copy node usually does what I need. Will that work for what you're trying to do?

[Tocy]

Ok, thanks Frank, again I really appreciate it. Regarding the shuffle copy, yes, in the future I also will use the copy node instead Shuffle copy doesn't erase existing layers, but if I want to put a channel beside 1-2 another channel in that layer, I have to set those existing channels as well. Nevermind. Copy node is the best
Here's another: how can I set defaults for nodes? I read that I can save gizmos from the node with the desired values, and replace in menu.tcl the node with this gizmo. Isn't there an easier way?
Thanks
T.

[Aruna]

Yes.. In your init.tcl or menu.tcl, you can set defaults. For example, I've got this set up.

knob_default Bezier.channel alpha
knob_default Viewer.camera_near .01
knob_default Viewer.camera_far  200000
knob_default Viewer.use_alpha true

When I create a Bezier node, it only activates the alpha channel, instead of the usualy default of rgba. And there are some Viewer camera defaults too.

[rueter]

yes, you can do that in your menu.tcl:

knob_default <class>.<knob> <value>

example:

knob_default Blur.size 10

[465]

What does optiflow do exactly? Is it the same as Time>Oflow? I need the motion blur in roto-bezier as well.. Time blur works, kinda. It's just that the blur is inside the roto bezier, while I've roto-ed the core. So, instead of adding the blur outside the core, it's eating the core part. And I can't make the roto-ed core matte smaller/bigger overall since the part that needs to have blur is only on some areas. Any suggestions?