/// <summary>
/// Returns the corresponding circle's centre.
/// </summary>
public C2DPoint GetCircleCentre()
{
if (!IsValid())
{
return(new C2DPoint(0, 0));
}
C2DPoint MidPoint = new C2DPoint(Line.GetMidPoint());
double dMinToStart = MidPoint.Distance(Line.point);
double dMidToCentre = Math.Sqrt(Radius * Radius - dMinToStart * dMinToStart);
C2DVector MidToCentre = new C2DVector(Line.vector);
if (CentreOnRight)
{
MidToCentre.TurnRight();
}
else
{
MidToCentre.TurnLeft();
}
MidToCentre.SetLength(dMidToCentre);
return(MidPoint.GetPointTo(MidToCentre));
}
/// <summary>
/// Returns the projection of this onto the vector provided, given as the interval on
/// (or off) the vector. Interval given as distance from the start of the vector.
/// The vector is equivalent to a line from (0, 0).
/// </summary>
/// <param name="Vector">The projection vector.</param>
/// <param name="Interval">The interval to recieve the result.</param>
public override void Project(C2DVector Vector, CInterval Interval)
{
C2DArc ThisCopy = new C2DArc(this);
C2DVector VecCopy = new C2DVector(Vector);
double dAng = VecCopy.AngleFromNorth();
VecCopy.TurnLeft(dAng);
ThisCopy.RotateToRight(-dAng, new C2DPoint(0, 0));
C2DRect rect = new C2DRect();
ThisCopy.GetBoundingRect(rect);
Interval.dMax = rect.GetTop() - VecCopy.j;
Interval.dMin = Interval.dMax;
Interval.ExpandToInclude(rect.GetBottom() - VecCopy.j);
}
/// <summary>
/// Returns the projection of this onto the vector provided, given as the interval on
/// (or off) the vector. Interval given as distance from the start of the vector.
/// The vector is equivalent to a line from (0, 0).
/// </summary>
/// <param name="Vector">The projection vector.</param>
/// <param name="Interval">The interval to recieve the result.</param>
public override void Project(C2DVector Vector, CInterval Interval)
{
C2DArc ThisCopy = new C2DArc(this);
C2DVector VecCopy = new C2DVector(Vector);
double dAng = VecCopy.AngleFromNorth();
VecCopy.TurnLeft(dAng);
ThisCopy.RotateToRight( -dAng, new C2DPoint(0, 0));
C2DRect rect = new C2DRect();
ThisCopy.GetBoundingRect( rect);
Interval.dMax = rect.GetTop() - VecCopy.j;
Interval.dMin = Interval.dMax;
Interval.ExpandToInclude( rect.GetBottom() - VecCopy.j );
}
/// <summary>
/// Returns the corresponding circle's centre.
/// </summary>
public C2DPoint GetCircleCentre()
{
if (!IsValid() )
return new C2DPoint(0, 0);
C2DPoint MidPoint = new C2DPoint(Line.GetMidPoint());
double dMinToStart = MidPoint.Distance( Line.point);
double dMidToCentre = Math.Sqrt( Radius * Radius - dMinToStart * dMinToStart);
C2DVector MidToCentre = new C2DVector(Line.vector);
if ( CentreOnRight)
MidToCentre.TurnRight();
else
MidToCentre.TurnLeft();
MidToCentre.SetLength(dMidToCentre);
return (MidPoint.GetPointTo(MidToCentre));
}