Simple angle to point orient

[jonathantopf]

Hi there, I'm a new huodini user learning on the job after years using maya and this is my first odforce post after much reading.

 

I'm writing a very simple point wrangle node and the last step of the program involves turning a 0-1 rotation value representig a 360 rotation value in the Y axis into a per point orient value that a copy sop can then use to istantiate geometry with the correct orientation.

 

My problem is in converting these values, my first attempt was this

f@pi = 3.14159; 
@orient = set( 0, (2 * @pi) * @y_rot, 0  );

I do get an orient value in the correct axis but not what i was expecting and is clearly wrong.

 

Can anybody shed some light on how to construct a simple @orient value from a simple xyz rotation

 

Thanks!

[rafaelfs]

I believe orient is a vector pointing to a direction, not an array of Euler rotational values...

I could be wrong though!
Try this code:
 

float y_rot = 0;
y_rot = radians(random(@ptnum)*360);
vector axis = set(0, 1, 0);
vector4 Q = quaternion(y_rot, axis);
p@rot = set(Q);

rotation_and_copy.hip

Edited February 27, 2014 by rafaelfs

[jonathantopf]

Thats perfect thankyou, I was hoping that there was a simple way like this!