public SrdXrDisplay(SrdXrDisplaySize in_display_size, SrdXrDisplayResolution in_display_resolution, SrdXrPosef in_display_pose)
 {
     display_size       = in_display_size;
     display_resolution = in_display_resolution;
     display_pose       = in_display_pose;
 }
 private static Pose ToUnityPose(SrdXrPosef p)
 {
     return(new Pose(ToUnityVector(p.position), ToUnityQuaternion(p.orientation)));
 }