VFX - setting Tex Index does not work

Hello there, I have this simple graph with 1x2 atlas and trying to set a atlas index in Initialization context but it always renders first frame only.

Setting Tex Index to zero shows red color (first frame):



Setting Tex Index to 1 (or whatever other number) also shows only first frame (red) instead of second one (green):

 

Hi @sergiusz308,
Did you try in update? I think it should work OK. Don't use initialize context which I presume is above your empty update.



Just a thought - If you are going to do flip book plane with alpha in front of a gun, maybe VFX Graph is not the ideal tool for this as it can do so much more

 

@Olmi you mean add "set tex index" in the update? I want it to be randomized - as @JulienF_Unity suggested in other post to put it in the init context - I did it and it seems not being taken into account whatsoever.

If I'd have a single value maybe putting it in the update would do the trick but I want it to be initialized to random value and then play using that value. There's even a block called "Set Tex Index Random" and it does not work either

About using VFX being for much more - I am looking at it from code/assets mgmt point of view: it's easier to deal with a single particle system than multiple ones. Here it's a simple muzzle flash for a gun, but for other weapons we can have much more elaborated effects.

 

Well can't you set the random value from outside, C#? You could use some exposed parameter and set a random value there. Or just set random int value inside VFX Graph.

I'm not sure if I understand correctly. You want to set a single frame or a start frame. What do you mean with play? Play the flipbook sequence from that point forward? You would need to limit the range somehow if you want to play a region of your flipbook, like from frame 4-10, for example, so that it would wrap around.

 

I got two frames playbook and at each burst I just want to show a single frame, selected randomly. So in the example above it's a simple red and green rectangle - at each burst I want it to be red or green, picked randomly and displayed throughout the particle life.

 

Well, I think you can then just set the index through exposed parameter, if random doesn't function inside VFX Graph for some reason.

 

@Olmi - I will try that, but it looks like a bug.

 

Maybe that's the same issue as with ShaderGraph with uneven flipbook grids.
https://twitter.com/cayou66/status/1190695364476710912

 

@VladVNeykov Thanks for looking into this.

Anyway, I end up with this setup:



Upon clicking "play" it gives random value for the tex index.