Scripted node stuff Tweet

[grimm]

Hi Jason,

I think you're getting confused by the rounding errors:

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****Event Started****
Scrubber Time - 0.03999999910593
I think this is frame # 0


The time in Octane is represented in floating point. For example if you have 25 fps, the frame duration is 0.04 seconds. In floating point this is represented as 0.03999... . If you then use math.floor(currentTime / frameTime), you will always underestimate the frame number. What you should do is have an epsilon and if you're close enough to the integer, clamp it to the integer. I know it's subtle but there's not much we can do here.

Yarg, fp errors are a pita! Thanks Thomas.

It is operating in it's own graph. The turntable animation script takes a copy of the root graph of the project but not of the project itself. But octane.project.getSceneGraph() will always return the root graph of the original project. You can get around this by getting the parent graph of the scripted graph which is always the correct one.

Cool I will try that.

Accessing the project settings is the culprit here. I guess the best thing is to always fetch them during evaluation.

cheers,
Thomas

I will move that too for now, thanks again.

Jason

[grimm]

It is operating in it's own graph. The turntable animation script takes a copy of the root graph of the project but not of the project itself. But octane.project.getSceneGraph() will always return the root graph of the original project. You can get around this by getting the parent graph of the scripted graph which is always the correct one.

Hi Thomas,

I can get the parent of the graph easily by doing:

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graph:getProperties().graphOwner

But for the life of me I can't get from there to getting the project properties so I can pull the number of frames per second?!?

I also modified my frame calculator function to this, works much better now:

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function getFrame(currentTime)
   local halfFrame = frameTime/2 -- Force fix rounding errors
   return math.floor((currentTime + halfFrame)/frameTime)
end


[stratified]

I just tested it and I'm afraid you can't access the project settings either during evaluation until we fixed our bug. As a workaround I would add an extra input pin that configures the frame rate. It's a hassle for the user but I don't see any other way to work around this problem.

cheers,
Thomas

[grimm]

Cool, thanks, I will do that.

Jason

[grimm]

Hey Thomas,

*sigh* Looks like it's something else than accessing the root graph properties at start up. I removed all the properties code when I was adding the other input pin and it still locks up Octane when it is loading the script node script.

script_node_test2.ocs

(34.78 KiB) Downloaded 308 times

Thanks again,

Jason

[stratified]

Hey Jason,

I need to see your script that is referenced in the ocs (anim_texture.lua).

cheers,
Thomas

[grimm]

Here you go:

anim_texture.lua

(2.15 KiB) Downloaded 308 times

[stratified]

Here you go:

anim_texture.lua

You can't access the project settings either. Line 28 needs to go. You should have the user configure the fps.

cheers,
Thomas

[grimm]

*AAARG!* Thanks Thomas,

The bad lines of code have been thoroughly exercised. And it's working.

Jason