|Message: Angle distribution from direction cosines||Not Logged In (login)|
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Hi, my Geant4 output file gives me the direction cosines (DX, DY, DZ) of the particle. I have to calculate theta and phi (spherical coordinates) from these cosines and I'm using:
theta = acos(-MZ) phi = atan(DY/DX)
From the GPS Users Manual I have found:
The direction cosines are calculated as
Px = - sin(q) cos(f) Py = - sin(q) sin(f) Pz = - cos(q)
The problem is that the result is bit strange and I don't know if I'm using a wrong transformation. Can someone help me?
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