BCSTM-Player |

external/tween-engine/src/equations/Bounce.cpp

@@ -0,0 +1,42 @@
+//
+//  Bounce.cpp
+//
+//  This code is derived from Universal Tween Engine
+//  Licensed under Apache License 2.0 - http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#include <TweenEngine/equations/Bounce.h>
+
+namespace TweenEngine
+{
+    inline float outBounce(float t) {
+        if (t < (1/2.75)) {
+            return 7.5625f*t*t;
+        } else if (t < (2/2.75)) {
+            t = t - (1.5 / 2.75);
+            return (7.5625 * t * t + 0.75);
+        } else if (t < (2.5/2.75)) {
+            t = t - (2.25 / 2.75);
+            return (7.5625 * t * t + 0.9375);
+        } else {
+            t = t - (2.625 / 2.75);
+            return (7.5625 * t * t + 0.984375);
+        }
+    }
+
+    inline float inBounce(float t) {
+        return 1 - outBounce(1-t);
+    }
+   
+    float BounceIn::compute(float t) { return inBounce(t); }
+    const char *BounceIn::toString() { return "Bounce.IN"; }
+    
+    float BounceOut::compute(float t) { return outBounce(t); }
+    const char *BounceOut::toString() { return "Bounce.OUT"; }
+    
+    float BounceInOut::compute(float t) {
+        if (t < 0.5f) return (inBounce(t*2) * 0.5f);
+        else return (outBounce(t*2-1) * 0.5f + 0.5f);
+    }
+    const char *BounceInOut::toString() { return "Bounce.INOUT"; }
+}