Script Callbacks Between Rendered Frames?

[jamie_galimberti]

Hi, I'm trying to execute a script between each frame when rendering a sequence, but the usual 3dsmax callbacks aren't working. I've tried

[B]callbacks.addScript #postRenderFrame[/B]

and

[B]callbacks.addScript [/B][B]#preRenderFrame[/B]

, but neither calls mid-sequence: only at the beginning or end of the entire sequence being rendered. Is there another way to approach this that's vray-specific?

[^Lele^]

fn myCallback = print "hello"
callbacks.addScript #prerenderframe myCallback id:#myPRFCallback

This prints out at each frame of a rendered sequence for me.
#prerenderframe callbacks have certain limitations, what isn't working for you?

[jamie_galimberti]

Ah, thanks for confirming that it should be working! I added a few more "print" calls to help debug, and discovered I was removing the callback prematurely.

Edit: also discovered that currentTime.frame does not change between each frame, and always returns the first frame number of the sequence being rendered.

[^Lele^]

That too works for me.

fn myCallback = print (currentTime.frame as string)
callbacks.addScript #prerenderframe myCallback id:#myPRFCallback

This prints me out the float value for each rendered frame.

[jamie_galimberti]

Interesting. When I tried the following, all I ever got was "0000":

f = formattedPrint currentTime.frame format:"04d"
print f

Alternatively, when I just create my own variable and increment it, I get the desired output:

frameStart = 0;
frameSkip = 10;

function saveIRM =
(
    f = formattedPrint frameStart format:"04d"
    print f
    irmPath = "v:\\IRM\\irm"+f+".vrmap"
    vr=renderers.current
    vr.saveIrradianceMap(irmPath)
    frameStart = frameStart + frameSkip
)

There's certainly some nuances of MaxScript that slip past me.