public void Move(Double bearing, Double distance)
{
PointD np = FlatGeo.GetPoint(this, bearing, distance);
_X = np.X;
_Y = np.Y;
}
static Line LineFromCenterAndBearing(PointD centerPoint, Double bearing, Double distance)
{
PointD p1 = FlatGeo.GetPoint(centerPoint, Angle.Reverse(bearing), distance / 2);
PointD p2 = FlatGeo.GetPoint(centerPoint, bearing, distance / 2);
return(new Line(p1, p2));
}
void RecalculateAxes()
{
MajorAxis = new Line(
FlatGeo.GetPoint(_center, Angle.Reverse(_majorAxisBearing), _majorAxisLength / 2),
FlatGeo.GetPoint(_center, _majorAxisBearing, _majorAxisLength / 2));
Double minorAxisBearing = Angle.Add(_majorAxisBearing, 90);
MinorAxis = new Line(
FlatGeo.GetPoint(_center, Angle.Reverse(minorAxisBearing), _minorAxisLength / 2),
FlatGeo.GetPoint(_center, minorAxisBearing, _minorAxisLength / 2));
}
void RecalculateFociAndArea()
{
// __________
// \/ r1² * r2²
Double fociDistance = Math.Sqrt(MajorRadius * MajorRadius - MinorRadius * MinorRadius);
Foci = new PointD[]
{
FlatGeo.GetPoint(Center, Angle.Reverse(MajorAxis.Bearing), fociDistance),
FlatGeo.GetPoint(Center, MajorAxis.Bearing, fociDistance)
};
Eccentricity = new Line(Foci[0], Center).Length / new Line(Foci[0], MinorAxis.P1).Length;
Area = Math.PI * MajorRadius * MinorRadius;
}
public PointD GetPointAt(Double bearing, Double distance)
{
return(FlatGeo.GetPoint(this, bearing, distance));
}
public PointD GetPointAt(BearingAndRange vector)
{
return(FlatGeo.GetPoint(this, vector.Bearing, vector.Range));
}
public Line(PointD origin, Double bearing, Double distance)
: this(origin, FlatGeo.GetPoint(origin, bearing, distance))
{
}