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ANIMATED_SEQUENCE_FROM_COP_SOP_ISSUE

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Hi everyone, 

 

Since a long time on this forum but first post. I always found a solution that already exist here, but today...

 

First of all, let me explain the effect I want to do.

 

For some production, I have to reconstruct a ring (like a torus) and make a "compression" of it (to make it more solid). I don't know if i'm really clear but the meaning is, I create a displacement node in vopsop to make this effect. 

To manipulate the "compression" like i want, i create a map in cops to keep back the color data (or luminance) and use it with the displacement node.

 

 With a single image, it works perfectly. But (yes there is always a "but"!!) here is the issue: When i want to use a sequence (to have a animated displacement), Houdini crash, or it doesn't care of the sequence and use only the first pic.

 

I always found a solution without picture, I used an animated torus with a points from volume sop and an attribute transfer sop to keep back the red color. But I really want to use a pic sequence to make a better animation...

 

 

Obviously, it's not very clear, so I made a little hip file with a simple grid for you to see what i mean. ;)

 

Maybe someone could enlight me about this or tell me about another way to do this. 

 

Thx by advance.

 

Cheers, 

Paul

ANIMATED_COP_TO_SOP_ISSUE.hip

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I don't know about this, but; after you created the images in COPs and written them to disk - can't you just skip COPs altogether after that, and just read the images from disk directly?

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I Skybar, 

 

I already test this option and I'd got the same problem. Maybe a bug in H13?... I read something about link problems between COPs and SOPs.

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Yeah I mean, don't read them from disk in COPs, read them back in directly in SOPs. So you skip COPs entirely.

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Thx, I tried it.

 

But in VOPs, ColorMap node and Texture node "cannont have channels which depend on time". In other words, no image sequence. 

 

And when I read them directly with a material, i can't find a way to have "Cd" attribute from material :/

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Ok, with an AttribFromMap SOP, it works perfectly... I just have to write my COPs like you said and read the attribute I want with this node. 

 

So simple, sorry for the distrubance ;)

 

Thx

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Hi H20, can you post your solution up please, it really helps everyone who needs to resolve similar issues. Thanks!

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