diff options
Diffstat (limited to 'src/lib/maths_util.h')
| -rw-r--r-- | src/lib/maths_util.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/lib/maths_util.h b/src/lib/maths_util.h index 8adefbbc4..24c4b547f 100644 --- a/src/lib/maths_util.h +++ b/src/lib/maths_util.h @@ -30,6 +30,21 @@ extern double db_to_linear (double db); extern double linear_to_db (double linear); +/** @return linear gain according to a logarithmic curve, for fading in. + * t < 0: linear gain of 0 + * 0 >= t >= 1: logarithmic fade in curve + * t > 1: linear gain of 1 + */ +extern float logarithmic_fade_in_curve (float t); + + +/** @return linear gain according to a logarithmic curve, for fading out. + * t > 1: linear gain of 0 + * 0 >= t >= 1: logarithmic fade out curve + * t < 0: linear gain of 1 + */ +extern float logarithmic_fade_out_curve (float t); + template <class T> T clamp (T val, T minimum, T maximum) |