Nodes and Nodegraphs in Lua. Tweet

[abstrax]

How to manipulate static pins attributes inside nodes?
For example how to set camera aperture inside render target without creating camera node?

You can't. To provide values you need nodes. That's their whole purpose.

[phdubrov]

So if i need create compact preset with not default camera and kernel i create nodegraph with render target out and mesh input and make inside rendertarget, camera and kernel nodes with my defaults? It works but there is no more compact way to make it?

[stratified]

You could create your setup once and then save it as an OCS file.

Code: Select all

-- create your setup in a graph
...

-- save your graph out as an OCS file
xml = myGraph:writeOCs()
file = io.open("/path/to/file.ocs", "w")
file:write(xml)
file:close()

-- in another script you could load your setup again in the root graph
xml = file:read("*a")
octane.project.readOcs(xml, myGraph)

Hope this helps...

cheers,
Thomas

[abstrax]

So if i need create compact preset with not default camera and kernel i create nodegraph with render target out and mesh input and make inside rendertarget, camera and kernel nodes with my defaults? It works but there is no more compact way to make it?

I think here is something not clear enough yet: When you create a new node, it will be configured, i.e. for most pins an internal default node is created. You then only have to modify those things you need to modify and leave the rest alone. So if you create a new render target node, it already has an internal camera node, kernel node etc. Only the P_MESH will stay empty.

As an alternative you can set up whatever you want interactively in Octane Standalone and save it as .ocs file. Then load it into some temporary root node graph, like Thomas described and then copy the content of the root node graph into the root node graph of the current project. This way you won't loose the content of your current project, but merge the .ocs file into it.

[phdubrov]

I tried set camera attributes via rendertarget node not internal camera node. My bad. Didn't get internal nodes concept.
working code

Code: Select all

frontCamera = frontRT:getOwnedItem(octane.P_CAMERA)
frontCamera:setPinValue(octane.P_APERTURE, 0, true)


[abstrax]

I tried set camera attributes via rendertarget node not internal camera node. My bad. Didn't get internal nodes concept.
working code

Code: Select all

frontCamera = frontRT:getOwnedItem(octane.P_CAMERA)
frontCamera:setPinValue(octane.P_APERTURE, 0, true)


Don't know how your code above can work, but you would actually write:

Code: Select all

frontCamera = frontRT:getConnectedNode(octane.P_CAMERA)
frontCamera:setPinValue(octane.P_APERTURE, 0, true)


The key here is that a pin is not only connected to external nodes, but also to internal nodes. By fetching the connected node instead of the owned item, it would work if the pin is connected to an internal or an external node.

[phdubrov]

Why it shouldn't work? But your code is better, thanks.

[abstrax]

Why it shouldn't work? But your code is better, thanks.

I was wrong, your code should work as long as the pin has an internal node.

[Tugpsx]

Quick question, although this may have been answered elsewhere.
Since saving shaders is currently disabled, can we create a script to export shaders nodes to ocm files that we can load and use later.
It would make life easier not to recreate the settings every time I use these characters. I know mine isn't as complicated as others but every bit help.

Material Node example.

[stratified]

Quick question, although this may have been answered elsewhere.
Since saving shaders is currently disabled, can we create a script to export shaders nodes to ocm files that we can load and use later.
It would make life easier not to recreate the settings every time I use these characters. I know mine isn't as complicated as others but every bit help.

Materialnode.JPG

Hi,

I don't think it's worth to create the script because we shall re-enable material macros in one of the next releases... . You could save your materials with Octane 1.20 for now, the macros are compatible with this version.

cheers,
Thomas