src/main/java/me/topchetoeu/keystrokes/engine/Fadeout.java.old

@@ -0,0 +1,39 @@
+package me.topchetoeu.keystrokes.engine;
+
+public class Fadeout {
+    public float slope;
+    public float duration;
+
+    private boolean near(float f) {
+        return near(slope, f);
+    }
+    private boolean near(float a, float b) {
+        return Math.abs(a - b) < 0.001f;
+    }
+
+    public float calculate(float delta) {
+        if (delta > duration) return 0;
+
+        if (near(0)) return 1;
+        if (near(1)) return 1 - delta / duration;
+        if (near(2)) return 1 - (float)Math.sqrt(delta / duration);
+
+        float pow = 1 / slope;
+
+        if (near(pow, Math.round(pow))) {
+            float a = delta / duration;
+            float b = 1;
+
+            for (int i = 0; i < pow; i++) b *= a;
+
+            return 1 - b;
+        }
+
+        return 1 - (float)Math.pow(delta / duration, pow); 
+    }
+
+    public Fadeout(float slope, float duration) {
+        this.slope = slope;
+        this.duration = duration;
+    }
+}