public override DistanceResult Distance(Point2D from)
{
DistanceResult res = new DistanceResult();
double angle = CalcAngle(from);
double endAngle = Utils.NormalizeAngle(StartAngle + SweepAngle);
if (IsAngleOnArc(angle) && angle != StartAngle && angle != endAngle)
{
double distFromCntr = Utils.Distance(from, Center);
res.Value = Math.Abs(distFromCntr - Radius);
res.Closest = CalcPoint(angle);
res.PointType = DistancePointType.Other;
}
else
{
Point2D startPoint = CalcPoint(StartAngle);
Point2D endPoint = CalcPoint(endAngle);
double l1 = Utils.Distance(from, startPoint);
double l2 = Utils.Distance(from, endPoint);
if (l1 <= l2)
{
res.Value = l1;
res.Closest = startPoint;
res.PointType = DistancePointType.Start;
}
else
{
res.Value = l2;
res.Closest = endPoint;
res.PointType = DistancePointType.End;
}
}
return(res);
}
public override DistanceResult Distance(Point2D from)
{
DistanceResult res = new DistanceResult();
double d1 = Utils.Distance(from, StartPoint);
double d2 = Utils.Distance(from, EndPoint);
Point2D closest;
double dm = Utils.DistanceXYFromLine(from, StartPoint, EndPoint, out closest);
if (d1 <= d2 && d1 <= dm)
{
res.Value = d1;
res.Closest = StartPoint;
res.PointType = DistancePointType.Start;
}
else if (d2 <= dm)
{
res.Value = d2;
res.Closest = EndPoint;
res.PointType = DistancePointType.End;
}
else
{
res.Value = dm;
res.Closest = closest;
res.PointType = DistancePointType.Other;
}
return(res);
}
private static LoopDistanceResult DistanceToLoop(Point2D from, Trace trace)
{
LoopDistanceResult minDist = new LoopDistanceResult();
minDist.Value = double.MaxValue;
foreach (Entity ent in trace.Entities)
{
DistanceResult dist = ent.Distance(from);
if (minDist.Value > dist.Value)
{
minDist.Value = dist.Value;
minDist.Entity = ent;
minDist.Closest = dist.Closest;
minDist.PointType = dist.PointType;
}
}
return(minDist);
}
public void Visit(Arc arc)
{
// проверяем указывает ли на дугу
DistanceResult dist = arc.Distance(Cursor);
Match = dist.Value < Epsilon / 2;
if (Match)
{
switch (dist.PointType)
{
case DistancePointType.Start:
MatchPoint = true;
Pt = dist.Closest;
break;
case DistancePointType.End:
MatchPoint = true;
Pt = dist.Closest;
break;
}
}
}
