Extract Transform VEX Variant

[schiho]

I'm trying to replicate the 'align' node with VEX.

What I'm looking for is simple matrix transform extraction with few reference point positions.

 

The goal is to calculate a rotation/translation matrix from between the actual geo and rest.

 

Thanks in advance.

Edited January 16, 2020 by schiho

[ftaswin]

vector p = point(0,"P",0); // pivot position
vector u = set(0,1,0);
vector n = normalize(v@v);
vector o = cross(u,n);
matrix3 m3 = set(o.x, o.y, o.z,
                 u.x, u.y, u.z,
                 n.x, n.y, n.z); //3D Rotation Matrix

matrix m4  = set(o.x, o.y, o.z, 0,
                 u.x, u.y, u.z, 0, 
                 n.x, n.y, n.z, 0,
                 p.x, p.y, p.z, 1); //3D Transformation matrix

If you dont have any vectors then you can build it using 3 points reference. Let me know if you need help for this too