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Skin with smooth transition


Alexey Vanzhula

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Hi. i want to produse acurate procedural skin (sweep, bridge).

 

I want to get smooth trasition between two faces. Like in this image http://i.imgur.com/Z37FK9d.png

 

I tried skin, sweep, bridge, loft, copy SOPs and it combinations, but the result is not acurate as I need.

All I get is good smooth curve between faces. But how to connect faces with the same topologies but with different shapes.

 

Any ideas?..

 

test scene:

https://dl.dropboxusercontent.com/u/75376916/sweep.hipnc

Edited by Alexey Vanzhula
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Bit of a brain exercise! I've never done anything like it but I thought I'd give it a go. Essentially what I do is to create a blendshape between the two faces, copy the range of the blend onto your curve and then skin it. The "resolution" is dependent on your curve, so give it a resample if it's needed.

One could even adjust it so that the blendshape is not linear if one would want that, could be more interesting. This is just a quick concept I came up with and it seems to work alright, hope it helps!

sweep_dv.hipnc

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Skybar, nice solution. I also used blendshape for copy profile. But look at this http://i.imgur.com/MzSvppm.png
I think in this situation we need to rotate profile on curve. But I dont undestand how to mix blended shape with rotation on curve (after polyframe for example) :(

Edited by Alexey Vanzhula
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Also i think in your example we can use simple blendshape (centered) connected to copy node. This blendshape will give blend factor from stamping (copy node). We don`t need trail, timeshift, attribcreate, attribpromote and delete SOPs. Am I right?

Edited by Alexey Vanzhula
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Yes you are absolutely right! I modified my hip a bit - modified nodes in green. I added normals to the curve which we use as "Up", and then we use the tangents as normal. The Copy SOP will use those attributes to orient the copies (I had turned it off before, it's on now), you could play around with the various template attributes to properly align the copies if it wouldn't work in another case. I suppose thats what "went wrong" in the first hip, the example was set up so nicely that it worked even if I told the Copy SOP to not orient the copies, and it looked alright. I moved the curve a bit and it seems to orient them properly now.

 

sweep2_dv.hipnc

Edited by Skybar
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