Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROTimingFunctionCubicBezier.h

@@ -0,0 +1,58 @@
+//
+//  VROTimingFunctionCubicBezier.h
+//  ViroRenderer
+//
+//  Created by Raj Advani on 10/22/15.
+//  Copyright © 2016 Viro Media. All rights reserved.
+//
+
+#ifndef __VROTunedCubicBezierTimingFunction__
+#define __VROTunedCubicBezierTimingFunction__
+
+#include "VROTimingFunction.h"
+#include <algorithm>
+
+static const int kTunedBezierLookupSteps = 3000;
+
+class VROTimingFunctionCubicBezier : public VROTimingFunction {
+
+public:
+
+    VROTimingFunctionCubicBezier(float x1, float y1, float x2, float y2) {
+        for (int i = 0; i < kTunedBezierLookupSteps; i++) {
+            float t = (float) i / (float) (kTunedBezierLookupSteps - 1);
+            float t_inv = 1-t;
+            float tsq = t*t;
+            float t_invsq = t_inv *t_inv;
+            float a = 3 * t_invsq * t;
+            float b = 3 * tsq * t_inv;
+            float c = tsq * t;
+
+            xLookup[i] = x1 * a + x2 * b + c;
+            yLookup[i] = y1 * a + y2 * b + c;
+        }
+    }
+
+    float getT(float t) {
+        float *begin = &xLookup[0];
+        float *end = &xLookup[kTunedBezierLookupSteps];
+
+        int index = std::binary_search(begin, end, t);
+        if (index < 0) {
+            index = 0 - (index + 1);
+        }
+
+        index = std::max(std::min(index, kTunedBezierLookupSteps - 1), 0);
+        return yLookup[index];
+    }
+
+    virtual ~VROTimingFunctionCubicBezier() {}
+
+private:
+
+    float xLookup[kTunedBezierLookupSteps];
+    float yLookup[kTunedBezierLookupSteps];
+
+};
+
+#endif /* defined(VROTunedCubicBezierTimingFunction__) */