Like the title says,i'm struggling to convert the N attribute to orient attrtibute. Been watchinng an hour of Junichiro Horikawa's video on the topic... and i just feel dumber after it

Cheers,

A.

N doesnt define full orientation, you need up vector also
you can provide it or just assume to be {0,1,0} to get the default houdini behavior as if not proided

tamte
N doesnt define full orientation, you need up vector also
you can provide it or just assume to be {0,1,0} to get the default houdini behavior as if not proided

vector nN = normalize(v@N);
vector nup = normalize(v@up);
p@orient = quaternion(maketransform(nN, nup));

Thanks Tomas, Posted on facebook as well, and Johnathan de Blok was kind enough to remind me of Matt's docs... where the answer was waiting to be studied for years :$ Seems slightly different than your code, but it does the trick nevertheless. Any benefit using one or ther other?

//@N = {0,1,0};
//float s = sin(@Time);
//float c = cos(@Time);
@up = set(0,1,0);

@orient = quaternion(maketransform(@N, @up));

I had a polyframe above where i did set the up attribute, and normals were set as well already. That bit of code did the rest. SKipped the (0, 1, 0) though.


Cheers again,

A.

Tamte's example is preferable because it's always better to normalize any vectors which used as axis.
Another good video to demystify quaternions