moved from h4570/tyra

2020-10-28 09:16:49 +01:00
commit 68eb496e11
90 changed files with 8066 additions and 0 deletions
@@ -0,0 +1,34 @@
+/*
+# ______       ____   ___
+#   |     \/   ____| |___|    
+#   |     |   |   \  |   |       
+#-----------------------------------------------------------------------
+# Copyright 2020, tyra - https://github.com/h4570/tyra
+# Licenced under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#include "./utils.hpp"
+
+#include <fastmath.h>
+
+/** Exponential ease-in-out animation 
+ * @param t Time
+ * @param b Start value
+ * @param c Change
+ * @param d Duration
+ * @returns Current animation position
+*/
+float Utils::expoEaseInOut(float t, float b, float c, float d)
+{
+    if (t == 0)
+        return b;
+
+    if (t == d)
+        return b + c;
+
+    if ((t /= d / 2) < 1)
+        return c / 2 * powf(2, 10 * (t - 1)) + b;
+
+    return c / 2 * (-powf(2, -10 * --t) + 2) + b;
+}