[Getdp] how to specify direction of hc?

[Alexandr.Pulnikov at be.atlascopco.com]

As mentioned in the manual
http://www.geuz.org/getdp/doc/texinfo/getdp_6.html#IDX549
you can access local coordinates through X[], Y[] and Z[] functions. The
rest is trivial.
Since you require a unit vector pointing out of a certain center {Xs,Ys,Zs}
towards the local
point, you could use the following relation for the magnetization:
Function{
Hc = 999000;
hc [Magnet] = Hc*Vector[(X[]-Xs)#1, (Y[]-Ys)#2, (Z[]-Zs)#3]/(Sqrt[#1*#1 +
#2*#2 + #3*#3]);
}
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