public static bool SnapLineToIntersection(IEnumerable <LineShape> lines, double threshold, Point2 point, out Point2 snap, out LineSnapMode result)
{
snap = default(Point2);
result = default(LineSnapMode);
foreach (var line0 in lines)
{
foreach (var line1 in lines)
{
if (line0 == line1)
{
continue;
}
Point2 clip;
if (Line2.LineIntersectWithLine(line0.StartPoint.ToPoint2(), line0.Point.ToPoint2(), line1.StartPoint.ToPoint2(), line1.Point.ToPoint2(), out clip))
{
var distance = clip.DistanceTo(point);
if (distance < threshold)
{
snap = clip;
result = LineSnapMode.Intersection;
return(true);
}
}
}
}
return(false);
}
public static bool SnapLineToMiddle(IEnumerable <LineShape> lines, double threshold, Point2 point, out Point2 snap, out LineSnapMode result)
{
snap = default(Point2);
result = default(LineSnapMode);
foreach (var line in lines)
{
var middle = Line2.Middle(line.StartPoint.ToPoint2(), line.Point.ToPoint2());
var distance = middle.DistanceTo(point);
if (distance < threshold)
{
snap = middle;
result = LineSnapMode.Middle;
return(true);
}
}
return(false);
}
