public static Point2d[] ParabolaHyperbola(Parabola2d pab, Hyperbola2d hyp) //tested ok
{
Transform2d tr = pab.ToStandardPosition; //y=x^2
hyp = new Hyperbola2d(hyp); //copy for transformation
hyp.Transform(tr); //to standard space of parabola for stabillity
GeneralConic2d gencon = hyp.ToGeneralConic();
var ptset = StandardPosParabolaGeneralConic(gencon);
ptset.Transform(tr.Inversed);
return(ptset.ToArray());
}
public override bool Transform(Transform2d t)
{
//transform hyperbola centered at origin, because it's more stable general conic
Hyperbola2d hyp = new Hyperbola2d(this);
hyp.center = Point2d.Origo;
var gencon = hyp.ToGeneralConic();
if (!gencon.Transform(new Transform2d(t.AX, t.AY, t.BX, t.BY, 0.0, 0.0)))
{
return(false);
}
hyp = gencon.Reduce() as Hyperbola2d;
if (hyp == null)
{
return(false);
}
//now transform centerpoint separately,
//and write bac to this
center = center.GetTransformed(t);
ratio = hyp.ratio;
majoraxis = hyp.majoraxis;
return(true);
/* double majax = majoraxis.Length;
* double minax = -majax * ratio;
* double rot = Rotation;
* bool reverse;
* Hyperbola_Transform(ref majax, ref minax, ref rot, ref center, t, out reverse);
*
* majoraxis = Vector2d.FromAngleAndLength(rot, majax);
* ratio = minax / majax;
*
* return true;*/
}