public static CoordSys CalculateCoordSystem(IReadOnlyList <CameraSpacePoint> vertices)
{
CameraSpacePoint noseTip = vertices[18];
CameraSpacePoint foreheadCenter = vertices[28];
CameraSpacePoint leftCheekBone = vertices[458];
CameraSpacePoint avgPoint = new CameraSpacePoint()
{
X = vertices.Average(a => a.X),
Y = vertices.Average(a => a.Y),
Z = vertices.Average(a => a.Z)
};
CameraSpacePoint translTop = avgPoint.SubtractFrom(foreheadCenter);
CameraSpacePoint translFront = avgPoint.SubtractFrom(noseTip);
CameraSpacePoint translSide = avgPoint.SubtractFrom(leftCheekBone);
return(Utilities.GramSchmidt(translFront, translTop, translSide, avgPoint));
}