Returns or sets the 'emissivity computation flag' of the interface given by index in the spectrum object given by spectrum. A value of 1 indicates that the emissivity is to be computed, a value of 0 means the assigned fixed value is used (no computation is done).

Please note:

Spectra are counted 1, 2, 3, ...

Emissivity positions are counted according to the following scheme:

0 (external surface of the glazing)

1 (surface of the first pane pointing to the interior)

2 (surface of the second pane pointing to the exterior)

3 (surface of the second pane pointing to the interior)

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