private Observer(double t, double x, double v)
{
this._v = v;
Origin = new SpacetimePoint(t, x);
}
public Coordinate Coord(SpacetimePoint p)
{
var g = LorentzFactor(Observer.Default);
return(new Coordinate(g * (p.T - Origin.T - _v * (p.X - Origin.X)), g * (p.X - Origin.X - _v * (p.T - Origin.T))));
}
public bool Equals(SpacetimePoint c) => (this.T - c.T < 1.0e-10) && (this.X - c.X < 1.0e-10);