/// <summary>
/// retrieve the component (0:X, 1:Y, 2:Z)
/// </summary>
public double GetOrd(OrdIdx ord)
{
switch (ord)
{
case OrdIdx.X: return(X);
case OrdIdx.Y: return(Y);
case OrdIdx.Z: return(Z);
default: throw new ArgumentException($"invalid ord {ord}. Must between one of 0,1,2");
}
}
/// <summary>
/// return a copy of this vector with ordinate ( 0:x 1:y 2:z ) changed
/// </summary>
public Vector3D Set(OrdIdx ordIdx, double value)
{
var x = X;
var y = Y;
var z = Z;
switch (ordIdx)
{
case OrdIdx.X: x = value; break;
case OrdIdx.Y: y = value; break;
case OrdIdx.Z: z = value; break;
default: throw new Exception($"invalid ordIdx:{ordIdx}");
}
return(new Vector3D(x, y, z));
}
