Underwater sound filter: an optimisation from terencehill

Signed-off-by: bones_was_here <bones_was_here@xonotic.au>

diff --git a/snd_mix.c b/snd_mix.c
index 9d5c2e54748357bac63074411114388e7d743e6e..d8ea1dbe3764a297ead5aef44712325d5d901ee4 100644 (file)
--- a/snd_mix.c
+++ b/snd_mix.c
@@ -344,7 +344,7 @@ void S_SetUnderwaterIntensity(void)
                underwater.intensity = max(underwater.intensity, target);
        }
 
-       underwater.alpha = exp(-underwater.intensity * log(12.f));
+       underwater.alpha = underwater.intensity ? exp(-underwater.intensity * log(12.f)) : 1.f;
 }
 
 static void S_UnderwaterFilter(int endtime)