Vx = -y/s; Vy = x/s; Vz = alpha*z;
Here, s = sqrt(x*x + y*y), the radial distance in the xy plane. The origin of the coordinates is in the middle of the low-z face of the box. Alpha is a scaling parameter for the z component of the vectors.
Port: alpha
Type: Dial
Scaling parameter for the z component of the vector field.
Port: Vectors
Type: Lattice
Constraints: 3-D.
3-vector.
float.
uniform.
Output lattice.