Android WebVR implementation, Cardboard 0.5.5 SDK

content/browser/vr/vr_transform_util.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_VR_VR_TRANSFORM_UTILS_H
+#define CONTENT_BROWSER_VR_VR_TRANSFORM_UTILS_H
+
+#include "content/common/vr_service.mojom.h"
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+namespace content {
+
+VRVector4Ptr MatrixToOrientationQuaternion(
+    const float m0[3], const float m1[3], const float m2[3]);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_VR_VR_TRANSFORM_UTILS_H