/// <summary>
/// Distance between this and the test point.
/// </summary>
/// <param name="TestPoint">The test point.</param>
/// <param name="ptOnThis">The closest point on this to the given point as a returned value.</param>
public override double Distance(C2DPoint TestPoint, C2DPoint ptOnThis)
{
C2DPoint ptCen = new C2DPoint(GetCircleCentre());
C2DCircle Circle = new C2DCircle(ptCen, Radius);
C2DPoint ptOnCircle = new C2DPoint();
double dCircleDist = Circle.Distance(TestPoint, ptOnCircle);
if (ArcOnRight ^ Line.IsOnRight(ptOnCircle))
{
// The closest point on the circle isn't on the curve
double d1 = TestPoint.Distance(Line.point);
double d2 = TestPoint.Distance(Line.GetPointTo());
if (d1 < d2)
{
ptOnThis.Set(Line.point);
return(d1);
}
else
{
ptOnThis.Set(Line.GetPointTo());
return(d2);
}
}
else
{
// The closest point on the circle IS on the curve
ptOnThis.Set(ptOnCircle);
return(Math.Abs(dCircleDist));
}
}
/// <summary>
/// Distance between this and another straight line.
/// </summary>
/// <param name="TestLine">The test line.</param>
/// <param name="ptOnThis">The closest point on this to the other as a returned value.</param>
/// <param name="ptOnOther">The closest point on the other to this as a returned value.</param>
public double Distance(C2DLine TestLine, C2DPoint ptOnThis, C2DPoint ptOnOther)
{
C2DCircle Circle = new C2DCircle(GetCircleCentre(), Radius);
double dCircDist = Circle.Distance(TestLine, ptOnThis, ptOnOther);
double dDist = 0;
if (TestLine.IsOnRight(ptOnThis) ^ ArcOnRight)
{
// The point found isn't on this.
// This means the 2 closest points cannot be ON both lines, we must have a end point as one.
ptOnThis.Set(Line.point);
dDist = TestLine.Distance(ptOnThis, ptOnOther);
C2DPoint ptThisTemp = new C2DPoint(Line.GetPointTo());
C2DPoint ptOtherTemp = new C2DPoint();
double d2 = TestLine.Distance(ptThisTemp, ptOtherTemp);
if (d2 < dDist)
{
dDist = d2;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(ptOtherTemp);
}
// If the line was outside the circle then stop here as no need to go any further.
// This is because the closest point on this must be one of the end points.
if (dCircDist < 0)
{
double d3 = Distance(TestLine.point, ptThisTemp);
if (d3 < dDist)
{
dDist = d3;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(Line.point);
}
double d4 = Distance(TestLine.GetPointTo(), ptThisTemp);
if (d4 < dDist)
{
dDist = d4;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(Line.GetPointTo());
}
}
}
else
{
dDist = Math.Abs(dCircDist);
}
// ptOnThis.Set(ptThis);
// ptOnOther.Set(ptOther);
return(dDist);
}
/// <summary>
/// Distance between this and another straight line.
/// </summary>
/// <param name="TestLine">The test line.</param>
/// <param name="ptOnThis">The closest point on this to the other as a returned value.</param>
/// <param name="ptOnOther">The closest point on the other to this as a returned value.</param>
public double Distance(C2DLine TestLine, C2DPoint ptOnThis, C2DPoint ptOnOther)
{
C2DCircle Circle = new C2DCircle( GetCircleCentre(), Radius);
double dCircDist = Circle.Distance(TestLine, ptOnThis, ptOnOther);
double dDist = 0;
if (TestLine.IsOnRight(ptOnThis) ^ ArcOnRight)
{
// The point found isn't on this.
// This means the 2 closest points cannot be ON both lines, we must have a end point as one.
ptOnThis.Set(Line.point);
dDist = TestLine.Distance(ptOnThis, ptOnOther);
C2DPoint ptThisTemp = new C2DPoint(Line.GetPointTo());
C2DPoint ptOtherTemp = new C2DPoint();
double d2 = TestLine.Distance(ptThisTemp, ptOtherTemp);
if (d2 < dDist)
{
dDist = d2;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(ptOtherTemp);
}
// If the line was outside the circle then stop here as no need to go any further.
// This is because the closest point on this must be one of the end points.
if (dCircDist < 0)
{
double d3 = Distance(TestLine.point, ptThisTemp);
if (d3 < dDist)
{
dDist = d3;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(Line.point);
}
double d4 = Distance(TestLine.GetPointTo(), ptThisTemp);
if (d4 < dDist)
{
dDist = d4;
ptOnThis.Set(ptThisTemp);
ptOnOther.Set(Line.GetPointTo());
}
}
}
else
{
dDist = Math.Abs(dCircDist);
}
// ptOnThis.Set(ptThis);
// ptOnOther.Set(ptOther);
return dDist;
}
/// <summary>
/// Distance between this and the test point.
/// </summary>
/// <param name="TestPoint">The test point.</param>
/// <param name="ptOnThis">The closest point on this to the given point as a returned value.</param>
public override double Distance(C2DPoint TestPoint, C2DPoint ptOnThis)
{
C2DPoint ptCen = new C2DPoint( GetCircleCentre());
C2DCircle Circle = new C2DCircle(ptCen, Radius);
C2DPoint ptOnCircle = new C2DPoint();
double dCircleDist = Circle.Distance(TestPoint, ptOnCircle);
if (ArcOnRight ^ Line.IsOnRight(ptOnCircle))
{
// The closest point on the circle isn't on the curve
double d1 = TestPoint.Distance(Line.point);
double d2 = TestPoint.Distance(Line.GetPointTo());
if (d1 < d2)
{
ptOnThis.Set(Line.point);
return d1;
}
else
{
ptOnThis.Set(Line.GetPointTo());
return d2;
}
}
else
{
// The closest point on the circle IS on the curve
ptOnThis.Set(ptOnCircle);
return Math.Abs(dCircleDist);
}
}