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diff --git a/gfx/vr/service/osvr/Util/Vec3C.h b/gfx/vr/service/osvr/Util/Vec3C.h
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+++ b/gfx/vr/service/osvr/Util/Vec3C.h
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+/** @file
+    @brief Header
+
+    Must be c-safe!
+
+    @date 2014
+
+    @author
+    Sensics, Inc.
+    <http://sensics.com/osvr>
+*/
+
+/*
+// Copyright 2014 Sensics, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#ifndef INCLUDED_Vec3C_h_GUID_BF4E98ED_74CF_4785_DB61_109A00BA74DE
+#define INCLUDED_Vec3C_h_GUID_BF4E98ED_74CF_4785_DB61_109A00BA74DE
+
+/* Internal Includes */
+#include <osvr/Util/APIBaseC.h>
+
+/* Library/third-party includes */
+/* none */
+
+/* Standard includes */
+/* none */
+
+OSVR_EXTERN_C_BEGIN
+
+/** @addtogroup UtilMath
+    @{
+*/
+/** @brief A structure defining a 3D vector, often a position/translation.
+ */
+typedef struct OSVR_Vec3 {
+  /** @brief Internal array data. */
+  double data[3];
+} OSVR_Vec3;
+
+#define OSVR_VEC_MEMBER(COMPONENT, INDEX)                             \
+  /** @brief Accessor for Vec3 component COMPONENT */                 \
+  OSVR_INLINE double osvrVec3Get##COMPONENT(OSVR_Vec3 const* v) {     \
+    return v->data[INDEX];                                            \
+  }                                                                   \
+  /** @brief Setter for Vec3 component COMPONENT */                   \
+  OSVR_INLINE void osvrVec3Set##COMPONENT(OSVR_Vec3* v, double val) { \
+    v->data[INDEX] = val;                                             \
+  }
+
+OSVR_VEC_MEMBER(X, 0)
+OSVR_VEC_MEMBER(Y, 1)
+OSVR_VEC_MEMBER(Z, 2)
+
+#undef OSVR_VEC_MEMBER
+
+/** @brief Set a Vec3 to the zero vector */
+OSVR_INLINE void osvrVec3Zero(OSVR_Vec3* v) {
+  osvrVec3SetX(v, 0);
+  osvrVec3SetY(v, 0);
+  osvrVec3SetZ(v, 0);
+}
+
+/** @} */
+
+OSVR_EXTERN_C_END
+
+#ifdef __cplusplus
+template <typename StreamType>
+inline StreamType& operator<<(StreamType& os, OSVR_Vec3 const& vec) {
+  os << "(" << vec.data[0] << ", " << vec.data[1] << ", " << vec.data[2] << ")";
+  return os;
+}
+#endif
+
+#endif