public static IntersectionResult ArcArc(GArc arc, GLine line)
{
var result = new IntersectionResult();
var d = line.EndPoint.Sub(line.StartPoint);
var al = Math.Atan(d.Y / d.X);
var endAngle = arc.StartAngle - arc.SweepAngle;
//no intersection
if (al < arc.StartAngle || al > endAngle)
{
return(result);
}
else
{
}
return(result);
}
public static IntersectionResult ArcLine(GArc arc, GLine line)
{
var result = new IntersectionResult();
double dx = line.EndPoint.X - line.StartPoint.X;
double dy = line.EndPoint.Y - line.StartPoint.Y;
double theta = Math.Atan2(dy, dx);
var d = line.StartPoint.Distance(line.EndPoint);
double r = d - ((arc.MajorAxe * arc.MinorAxe) /
Math.Sqrt(Math.Pow(arc.MinorAxe * Math.Cos(theta), 2)
+ Math.Pow(arc.MajorAxe * Math.Sin(theta), 2)));
result.IntersectionPoints.Add(
new PointF((float)(line.StartPoint.X + r * Math.Cos(theta)),
(float)(line.StartPoint.Y + r * Math.Sin(theta)))
);
return(result);
}