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falseresync · Jan 7, 2025 · bc91c95 · bc91c95
1 parent e5591bd
commit bc91c95
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Showing 2 changed files with 250 additions and 39 deletions.
diff --git a/src/main/java/falseresync/lib/math/Easing.java b/src/main/java/falseresync/lib/math/Easing.java
@@ -4,24 +4,142 @@
  * @author <a href="https://github.com/ai/easings.net">Easings.net</a>
  */
 public class Easing {
-    public static double easeInOutBack(double x) {
-        final double c1 = 1.70158;
-        final double c2 = c1 * 1.525;
+    public static double easeInSine(double x) {
+        return 1 - Math.cos((x * Math.PI) / 2);
+    }
+
+    public static double easeOutSine(double x) {
+        return Math.sin((x * Math.PI) / 2);
+    }
+
+    public static double easeInOutSine(double x) {
+        return -(Math.cos(Math.PI * x) - 1) / 2;
+    }
+
+    public static double easeInQuad(double x) {
+        return x * x;
+    }
+
+    public static double easeOutQuad(double x) {
+        return 1 - (1 - x) * (1 - x);
+    }
+
+    public static double easeInOutQuad(double x) {
+        return x < 0.5 ? 2 * x * x : 1 - Math.pow(-2 * x + 2, 2) / 2;
+    }
+
+    public static double easeInCubic(double x) {
+        return x * x * x;
+    }
 
-        return x < 0.5
-                ? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2
-                : (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
+    public static double easeOutCubic(double x) {
+        return 1 - Math.pow(1 - x, 3);
     }
 
     public static double easeInOutCubic(double x) {
         return x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2;
     }
 
+    public static double easeInQuart(double x) {
+        return x * x * x * x;
+    }
+
+    public static double easeOutQuart(double x) {
+        return 1 - Math.pow(1 - x, 4);
+    }
+
     public static double easeInOutQuart(double x) {
         return x < 0.5 ? 8 * x * x * x * x : 1 - Math.pow(-2 * x + 2, 4) / 2;
     }
 
+    public static double easeInQuint(double x) {
+        return x * x * x * x * x;
+    }
+
+    public static double easeOutQuint(double x) {
+        return 1 - Math.pow(1 - x, 5);
+    }
+
+    public static double easeInOutQuint(double x) {
+        return x < 0.5 ? 16 * x * x * x * x * x : 1 - Math.pow(-2 * x + 2, 5) / 2;
+    }
+
+    public static double easeInExpo(double x) {
+        return x == 0 ? 0 : Math.pow(2, 10 * x - 10);
+    }
+
+    public static double easeOutExpo(double x) {
+        return x == 1 ? 1 : 1 - Math.pow(2, -10 * x);
+    }
+
+    public static double easeInOutExpo(double x) {
+        return x == 0 ? 0 : x == 1 ? 1 : x < 0.5 ? Math.pow(2, 20 * x - 10) / 2 : (2 - Math.pow(2, -20 * x + 10)) / 2;
+    }
+
+    public static double easeInCirc(double x) {
+        return 1 - Math.sqrt(1 - Math.pow(x, 2));
+    }
+
     public static double easeOutCirc(double x) {
         return Math.sqrt(1 - Math.pow(x - 1, 2));
     }
+
+    public static double easeInOutCirc(double x) {
+        return x < 0.5 ? (1 - Math.sqrt(1 - Math.pow(2 * x, 2))) / 2 : (Math.sqrt(1 - Math.pow(-2 * x + 2, 2)) + 1) / 2;
+    }
+
+    public static double easeInBack(double x) {
+        final double c1 = 1.70158;
+        final double c3 = c1 + 1;
+        return c3 * x * x * x - c1 * x * x;
+    }
+
+    public static double easeOutBack(double x) {
+        final double c1 = 1.70158;
+        final double c3 = c1 + 1;
+        return 1 + c3 * Math.pow(x - 1, 3) + c1 * Math.pow(x - 1, 2);
+    }
+
+    public static double easeInOutBack(double x) {
+        final double c1 = 1.70158;
+        final double c2 = c1 * 1.525;
+        return x < 0.5 ? (Math.pow(2 * x, 2) * ((c2 + 1) * 2 * x - c2)) / 2 : (Math.pow(2 * x - 2, 2) * ((c2 + 1) * (x * 2 - 2) + c2) + 2) / 2;
+    }
+
+    public static double easeInElastic(double x) {
+        final double c4 = (2 * Math.PI) / 3;
+        return x == 0 ? 0 : x == 1 ? 1 : -Math.pow(2, 10 * x - 10) * Math.sin((x * 10 - 10.75) * c4);
+    }
+
+    public static double easeOutElastic(double x) {
+        final double c4 = (2 * Math.PI) / 3;
+        return x == 0 ? 0 : x == 1 ? 1 : Math.pow(2, -10 * x) * Math.sin((x * 10 - 0.75) * c4) + 1;
+    }
+
+    public static double easeInOutElastic(double x) {
+        final double c5 = (2 * Math.PI) / 4.5;
+        return x == 0 ? 0 : x == 1 ? 1 : x < 0.5 ? -(Math.pow(2, 20 * x - 10) * Math.sin((20 * x - 11.125) * c5)) / 2 : (Math.pow(2, -20 * x + 10) * Math.sin((20 * x - 11.125) * c5)) / 2 + 1;
+    }
+
+    public static double easeInBounce(double x) {
+        return 1 - easeOutBounce(1 - x);
+    }
+
+    public static double easeOutBounce(double x) {
+        final double n1 = 7.5625;
+        final double d1 = 2.75;
+        if (x < 1 / d1) {
+            return n1 * x * x;
+        } else if (x < 2 / d1) {
+            return n1 * (x -= 1.5 / d1) * x + 0.75;
+        } else if (x < 2.5 / d1) {
+            return n1 * (x -= 2.25 / d1) * x + 0.9375;
+        } else {
+            return n1 * (x -= 2.625 / d1) * x + 0.984375;
+        }
+    }
+
+    public static double easeInOutBounce(double x) {
+        return x < 0.5 ? (1 - easeOutBounce(1 - 2 * x)) / 2 : (1 + easeOutBounce(2 * x - 1)) / 2;
+    }
 }