public void Constructor_Default()
{
RectangularCoordinate rc = default;
PolarCoordinate pc = rc.ToPolar();
pc.R.AssertIsEqualTo(0);
pc.Φ.AssertIsEqualTo(0);
}
public void Cast_HyperspehricalEqualsRectangular(double x, double y)
{
var rc = new RectangularCoordinate(x, y);
Span <Number> cc = new Number[] { x, y };
Span <Number> buffer = stackalloc Number[1];
var pc = rc.ToPolar();
HypersphericalCoordinate sc = cc.ToSpherical(in buffer);
sc.DimensionsCount.AssertIsEqualTo(2);
sc.R.AssertIsEqualTo(pc.R);
sc.Angles.Span.Single().AssertIsEqualTo(pc.Φ);
}