Is it possible to move 3 by 3 in the threads and output 3 values at a time inside a Float32Array ?

[itsKaspar]

I'm currently writting a particle system, and following advice I have flattened all my particle position arrays so that they look like [x,y,z,x,y,z,x,y,z,..]. Nevertheless, an issue that I am hitting is that sometimes I have to normalize vectors, or set their magnitude, which means that I'm often writting the code :

const o = this.thread.x % 3; // 0 if x, 1 if y, 2 if z

// get current position
const px = pos[this.thread.x - o + 0];
const py = pos[this.thread.x - o + 1];
const pz = pos[this.thread.x - o + 2]; 

Which is then followed by expensive operations that I had to do only once per thread when I was using a Vector3 Array as an input and output.

I gather that I can probably ignore 2 out of 3 threads with a simple %3 operation but if I do that I need to output 3 consecutive values in the same Float32Array at each thread % 3. Is there a way for a kernel to return multiple values at once. Something that would act the same way as this :

myFloat32Array.push(x)
myFloat32Array.push(y)
myFloat32Array.push(z)

Thanks a lot !