/////////////INTERSECTION_METHODS//////////////
///////////////////////////////////////////////
////////////////TANGENT_METHODS////////////////
public override GlLineR2 getTangentFromBelongs(GlPointR2 P)
{
if (P == null || !this.isPointBelongs(P))
{
return(new GlLineR2(new GlPointR2(null), new GlVectorR2(null)));
}
GlPointR2 TP = P.getPointTranslatedToRotatedSystem(this.SIN, this.COS, this.Center);
float k = (TP.Y >= 0 ? 1 : -1) * AdditionalHalfAixis * TP.X / (RealHalfAixis * (float)Math.Sqrt(TP.X * TP.X - Math.Pow(RealHalfAixis, 2.0)));
GlLineR2 tangent = new GlLineR2(P, new GlVectorR2(1, 0).getRotatedVector((float)Math.Atan(k)));
tangent.Rotate(this.SIN, this.COS);
return(tangent);
}
/////////////INTERSECTION_METHODS//////////////
///////////////////////////////////////////////
////////////////TANGENT_METHODS////////////////
public override GlLineR2 getTangentFromBelongs(GlPointR2 P)
{
if (P == null || P.isNullPoint())
{
return(new GlLineR2(new GlPointR2(null), new GlVectorR2(null)));
}
GlParabola TPB = new GlParabola(this.A, new GlPointR2(0, 0), new GlVectorR2(1, 0));
GlPointR2 TP = P.getPointTranslatedToRotatedSystem(this.SIN, this.COS, this.Vertex);
float k = 2 * TPB.A * TP.X + TPB.B;
GlLineR2 tangent = new GlLineR2(P, new GlVectorR2(1, 0).getRotatedVector((float)Math.Atan(k)));
tangent.Rotate(this.SIN, this.COS);
return(tangent);
}
public override GlLineR2 getTangentFromBelongs(GlPointR2 P)
{
if (P == null || P.isNullPoint() || !this.isPointBelongs(P) || this.RadA == 0.0f)
{
return(new GlLineR2(new GlPointR2(null), new GlVectorR2(null)));
}
GlOval IO = new GlOval(this.RadA, this.RadB, new GlVectorR2(this.RadA, 0.0f), new GlPointR2(0.0f, 0.0f));
GlPointR2 MovedPoint = P.getPointTranslatedToRotatedSystem(this.SIN, this.COS, new GlPointR2(this.CenterX, this.CenterY));
GlLineR2 tangent = new GlLineR2(MovedPoint, new GlVectorR2(-(float)Math.Pow(this.RadA, 2.0) * MovedPoint.Y, (float)Math.Pow(this.RadB, 2.0) * MovedPoint.X));
tangent.Rotate(this.SIN, this.COS);
tangent.moveTo(P);
return(tangent);
}