Align 2 polygons

[cudarsjanis]

Hey guys!

Does anyone knows how could I align 2 polygons and then somehow access those angle values so I could reference it on another transform node. because using just align node, I can`t any attributes form it.

I added some screen shots so you get what I`m doing.

Basically I have 2 characters. One in rest position and other one animated. The animated one changes through out the shots. So i deleted out 1 polygon from each of them and by comparing them I could transform rest position to match first frame of animation. with position it`s no problem I just use centroid expression, but I`m stuck with rotation. I thought this one approach worked with attribute wrangle:

vector n1 = prim_normal(0, 0, 0.5, 0.5);
vector n2 = prim_normal(1, 0, 0.5, 0.5);

matrix3 rot_matrix = dihedral(n1, n2);

@P *= rot_matrix;

vector rotate = cracktransform(0,0,1,@P,rot_matrix);

v@out = rotate;

Where I compare normals,

But I discovered that if angle difference is quite big it does not work.

Basically I would like to do what align node does, but through vex or vops, so I could get some usable attributes out.

Thank you

 

 

[f1480187]

It may be not what you are looking for, but try Extract Transform OBJ first. It extracts transform from geometry differences, not by simply subtracting object-level transforms, as I thought earlier. Quite powerful tool, may be used to align geometry at sop level also.

extract_transform.hipnc

 

It should help. Otherwise, another link may be useful:

 

[cudarsjanis]

Not exactly what I was looking for but thank you for the answer. Went with a bit different approach.