/// <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>
/// Rotates this to the right about the origin provided.
/// </summary>
/// <param name="dAng">The angle through which to rotate.</param>
/// <param name="Origin">The origin about which to rotate.</param>
public override void RotateToRight(double dAng, C2DPoint Origin)
{
C2DVector vector = new C2DVector(Origin, this);
vector.TurnRight(dAng);
x = Origin.x + vector.i;
y = Origin.y + vector.j;
}
/// <summary>
/// Rotates this to the right about the origin provided.
/// </summary>
/// <param name="dAng">The angle through which to rotate.</param>
/// <param name="Origin">The origin about which to rotate.</param>
public override void RotateToRight(double dAng, C2DPoint Origin)
{
C2DVector vector = new C2DVector(Origin, this);
vector.TurnRight(dAng);
x = Origin.x + vector.i;
y = Origin.y + vector.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));
}