Point normals with Wire Deform SOP

[adizepl]

Hi all,

I have a problem with wrong point normals.

Basically I have an L-system vine which I am deforming with Wire Deform SOP. I am separating the 'anchor points' of the leaves and I want to add the leaves back after the Wire Deform SOP (if I keep the leaves geometry together, the wire deform screws up the leaf geometry). I also want to do it this way, as I want to control the leaves animation and growth with copy stamping which won't be possible if I keep everything together.

But if I separate the anchor points and then add the leaves back with copy SOP, the point normals are different that those I would get if I deform the whole L-system together.

I hope it makes sense, any suggestions how to fix it would be greatly appreciated.

I attached screenshots and my .hip file with both set ups.

 

Correct normals, screwed up geo:

Wrong normals, correct geo

normals_lsystem_problem.hipnc

[edward]

Do you need to deform your old normals? Otherwise, a hack is to append a Normal SOP after the merge5 node to recompute them.

[adizepl]

Yes, I need to deform my 'leaf normals' so that they match the deformed vine.

[f1480187]

 

Wire Deform doesn't orient circles at all. You need to compute orient attributes after deform.

 

orient_leafs.hipnc

[adizepl]

Thank you so much, that solves my problem