/// <summary>
        /// Get projection matrix
        /// </summary>
        /// <returns>Matrix4x4 projection matrix</returns>
        public Matrix4x4 GetProjectionMatrix()
        {
            float[] glProjection = new float[16];

            NativeAPI.CameraDevice_getProjectionMatrix(glProjection);

            return(MatrixUtils.ConvertGLProjectionToUnityProjection(glProjection));
        }