public PolyCurve ToPolyCurve(double radius)
{
Circle2 circle2 = new Circle2(this.M, radius);
PolyCurve polyCurve1 = new PolyCurve();
Circle circle = new Circle(new Point3d(this.M.x, this.M.y, 0.0), radius);
double num1 = double.NaN;
double num2 = double.NaN;
List <Line2> line2List = this.Edges();
PolyCurve polyCurve2;
if (line2List.Count == 0)
{
polyCurve2 = (PolyCurve)null;
}
else
{
int num3 = line2List.Count - 1;
for (int index = 0; index <= num3; ++index)
{
double l0 = 0.0;
double l1 = 0.0;
double a0 = 0.0;
double a1 = 0.0;
switch (circle2.Intersect(line2List[index], ref l0, ref l1, ref a0, ref a1))
{
case LineCircleX.Secant:
Node2 node2_1 = line2List[index].PointAt(l0);
Node2 node2_2 = line2List[index].PointAt(l1);
if (l0 <= 1.0 && l1 >= 0.0)
{
if (l0 >= 0.0)
{
if (l0 < 1.0)
{
if (double.IsNaN(num1))
{
num1 = a0;
}
if (!double.IsNaN(num2))
{
Node2 node2_3 = circle2.PointAt(num2);
Node2 node2_4 = circle2.PointAt(a0);
Vec2 vec2 = circle2.TangentAt(num2);
Arc arc = new Arc(new Point3d(node2_3.x, node2_3.y, 0.0), new Vector3d(vec2.x, vec2.y, 0.0), new Point3d(node2_4.x, node2_4.y, 0.0));
polyCurve1.Append(arc);
}
if (l1 > l0 && l1 <= 1.0)
{
polyCurve1.Append(new Line(new Point3d(node2_1.x, node2_1.y, 0.0), new Point3d(node2_2.x, node2_2.y, 0.0)));
num2 = a1;
break;
}
polyCurve1.Append(new Line(new Point3d(node2_1.x, node2_1.y, 0.0), new Point3d(line2List[index].Bx, line2List[index].By, 0.0)));
num2 = double.NaN;
break;
}
break;
}
if (l1 >= 0.0 && l1 <= 1.0)
{
polyCurve1.Append(new Line(new Point3d(line2List[index].Ax, line2List[index].Ay, 0.0), new Point3d(node2_2.x, node2_2.y, 0.0)));
num2 = a1;
break;
}
polyCurve1.Append(new Line(new Point3d(line2List[index].Ax, line2List[index].Ay, 0.0), new Point3d(line2List[index].Bx, line2List[index].By, 0.0)));
num2 = double.NaN;
break;
}
break;
}
}
if (!double.IsNaN(num2) && !double.IsNaN(num1))
{
Node2 node2_1 = circle2.PointAt(num2);
Node2 node2_2 = circle2.PointAt(num1);
Vec2 vec2 = circle2.TangentAt(num2);
Arc arc = new Arc(new Point3d(node2_1.x, node2_1.y, 0.0), new Vector3d(vec2.x, vec2.y, 0.0), new Point3d(node2_2.x, node2_2.y, 0.0));
polyCurve1.Append(arc);
}
if (polyCurve1.SegmentCount == 0)
{
polyCurve1.Append((Curve) new ArcCurve(new Circle(new Point3d(this.M.x, this.M.y, 0.0), radius)));
}
polyCurve2 = polyCurve1;
}
return(polyCurve2);
}