From 8fd678bbb21a768bb6907f275db1e461f05b086f Mon Sep 17 00:00:00 2001
From: Evan Hemsley <evan@moonside.games>
Date: Tue, 29 Oct 2019 17:38:04 -0700
Subject: [PATCH] OutInQuad

---
 Easing/Easing.cs | 34 ++++++++++++++++++++++++++++++++++
 Test/Easing.cs   | 26 ++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)

diff --git a/Easing/Easing.cs b/Easing/Easing.cs
index 66c2c50..6ac25c4 100644
--- a/Easing/Easing.cs
+++ b/Easing/Easing.cs
@@ -124,5 +124,39 @@ namespace MoonTools.Core.Easing
                 return -c / 2 * ((t - 1) * (t - 3) - 1) + b;
             }
         }
+
+        // OUT IN QUAD
+
+        public static float OutInQuad(float t) => NormalizedTime(OutInQuad, t);
+        public static float OutInQuad(float time, float start, float end) => TimeRange(OutInQuad, time, start, end);
+
+        public static float OutInQuad(float t, float b, float c, float d)
+        {
+            CheckTime(t, d);
+            if (t < d / 2)
+            {
+                return OutQuad(t * 2, b, c / 2, d);
+            }
+            else
+            {
+                return InQuad((t * 2) - d, b + c / 2, c / 2, d);
+            }
+        }
+
+        public static double OutInQuad(double t) => NormalizedTime(OutInQuad, t);
+        public static double OutInQuad(double time, double start, double end) => TimeRange(OutInQuad, time, start, end);
+
+        public static double OutInQuad(double t, double b, double c, double d)
+        {
+            CheckTime(t, d);
+            if (t < d / 2)
+            {
+                return OutQuad(t * 2, b, c / 2, d);
+            }
+            else
+            {
+                return InQuad((t * 2) - d, b + c / 2, c / 2, d);
+            }
+        }
     }
 }
diff --git a/Test/Easing.cs b/Test/Easing.cs
index c9216fb..df9a951 100644
--- a/Test/Easing.cs
+++ b/Test/Easing.cs
@@ -123,5 +123,31 @@ namespace Test
             Easing.InOutQuad(4.0, 2, 6).Should().Be(4);
             Easing.InOutQuad(5.0, 2, 6).Should().Be(5.5);
         }
+
+        [Test]
+        public void OutInQuad()
+        {
+            Easing.OutInQuad(0.25f).Should().Be(0.375f);
+            Easing.OutInQuad(0.5f).Should().Be(0.5f);
+            Easing.OutInQuad(0.75f).Should().Be(0.625f);
+
+            Action invalidTime = () => Easing.OutInQuad(1.5f);
+            invalidTime.Should().Throw<ArgumentException>();
+
+            Easing.OutInQuad(0.25).Should().Be(0.375);
+            Easing.OutInQuad(0.5).Should().Be(0.5);
+            Easing.OutInQuad(0.75).Should().Be(0.625);
+
+            Easing.OutInQuad(3, 2, 6).Should().Be(3.5f);
+            Easing.OutInQuad(4, 2, 6).Should().Be(4f);
+            Easing.OutInQuad(5, 2, 6).Should().Be(4.5f);
+
+            invalidTime = () => Easing.OutInQuad(7, 2, 6);
+            invalidTime.Should().Throw<ArgumentException>();
+
+            Easing.OutInQuad(3.0, 2, 6).Should().Be(3.5);
+            Easing.OutInQuad(4.0, 2, 6).Should().Be(4);
+            Easing.OutInQuad(5.0, 2, 6).Should().Be(4.5);
+        }
     }
 }
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