From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sun, 11 Oct 2015 22:24:43 +0000 (+0200)
Subject: Make the fade look maybe a tad more natural.
X-Git-Tag: 1.0.0~240
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=0f7d09a35eaf85615d2acd2df370a4f230eb9890;p=nageru

Make the fade look maybe a tad more natural.
---

diff --git a/theme.lua b/theme.lua
index 8e433e2..b9d0b5b 100644
--- a/theme.lua
+++ b/theme.lua
@@ -273,6 +273,11 @@ function get_chain(num, t, width, height)
 
 				tt = fade_src + tt * (fade_dst - fade_src)
 
+				-- Make the fade look maybe a tad more natural, by pumping it
+				-- through a sigmoid function.
+				tt = 10.0 * tt - 5.0
+				tt = 1.0 / (1.0 + math.exp(-tt))
+
 				fade_chain_mix_effect:set_float("strength_first", tt)
 				fade_chain_mix_effect:set_float("strength_second", 1.0 - tt)
 			end