Fading though an image folder

[jameseye]

This is one that I have actually solved before -- like a year ago -- and I was happy with my final elegant solution.
(I had tried finding various solutions for a few weeks before one came to me in-a-flash...)

BUT, damn, I forgot how I did it and I cant find my magic file! :[

Goal: I have a JpegFolder thingy.... aiming at a folder with 10 images. and it is set to use an Index based on an "increase" parameter (so, it is spitting out image1... then image2... etc)

I want to fade from one image to the next.... and cycle back around when I get to the end.
So, image 1 fades to 2, 2 fades to 3..... , 9 fades to 10, 10 fades to 1....

I have tried a multimix getting input from two (essentially duplicate) JpegFolders [with the second one having an "offset" of 1]....
And I have tried playing around with the various timings (in the JpegFolders and the MultiMix).

But, no luck....
Anyone have any elegant ways?
Thanks!

[Sadler]

This setup will always ensure your images will sync. Have a global to control the looping with just an oscillator (or a ramp!) to drive 3 nodes: 2 JpegFolders and the Mix node. The expression in one JppegFolder tests for when the oscillator is close to 1, the other tests for when it is close to zero.

mix-jpeg-folder.png (58.42 KiB) Viewed 1304 times

If you want to have oscillators quicker or slower you might have to adjust the tests at either end so that the trigger triggers.

[jameseye]

Thanks SO much! Awesome!
But, I have an embarrassing question: what is inside the two expressions? I can see just the start.... if (X<0.0,...)?
Sorry -- I tried a few things and I cant get it figured out. Thanks!

[Sadler]

The first one is a test for when the oscillator is close to 1, something like: if (x>0.99, 1, 0). This means, when the input value is greater than 0.99, output 1 (to trigger the image change for this parameter), otherwise output 0.

Similarly for the second one, though this time you're checking close to zero, so: if (x<0.01,1,0).