Transfer Functions
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Recap: A Transfer function (TF) assigns emission and absorption coefficients to each specific scalar value s.
Linear default behavior of a gas:
with global emission and absorption coefficients μA and μE.
A non-linear assignment is realized as
- lookup table
- union of line segments.
Pre-multiplication: implicit multiplication of the emission coefficients with the respective absorption coefficients:
Note: The over-operator automatically realizes pre-multiplied alpha values, since the fragment color is multiplied with the fragment opacity.
Display of transfer functions in the TF Editor as normalized unit function curves κ(s) and ρ(s) on the unit domain s,ρ(s),κ(s)∈[0,1]:
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