Here, we fill the vector of emission directions as follows:

- Uniformly distribute in global coordinates emission positions to result
in 8 emission points
- Compute outgoing directions in local spherical coordinates:
and
- Transform to local Cartesian directions , and
*Transform to global directions***E**.

The result is shown in
Figure 18,
i.e.,
a set of emission points
** **
and outgoing global directions ** E**.

Figure 18: Initial Emission.