public static Ellipse ToCadEllipse(EllipticArc arc, double defaultElevation)
{
EllipticArc ellipticArc = (EllipticArc)Utility.CloneObject(arc);
PointN pointN = (PointN)ellipticArc.CenterPoint;
if (double.IsNaN(pointN.Z))
{
pointN.Z = 0.0;
}
if (!pointN.ZSpecified)
{
pointN.Z = defaultElevation;
((PointN)ellipticArc.FromPoint).Z = defaultElevation;
((PointN)ellipticArc.ToPoint).Z = defaultElevation;
}
Point3d point3d = GIS2CAD.ToCadPoint3d((PointN)ellipticArc.FromPoint);
Point3d point3d2 = GIS2CAD.ToCadPoint3d((PointN)ellipticArc.ToPoint);
if (!ellipticArc.EllipseStd)
{
AGSEllipticalArc.TransformToEllipseStd(ref ellipticArc);
}
PointN pointN2 = (PointN)ellipticArc.FromPoint;
PointN pointN3 = (PointN)ellipticArc.ToPoint;
double arg_B7_0 = pointN2.X;
double arg_BF_0 = pointN2.Y;
double num = ellipticArc.MinorMajorRatio * ellipticArc.MinorMajorRatio;
double x = pointN2.X;
double y = pointN2.Y;
double x2 = pointN3.X;
double y2 = pointN3.Y;
double num2 = Math.Sqrt(num * x * x + y * y);
double num3 = Math.Sqrt(num * x2 * x2 + y2 * y2);
double num4 = 0.5 * (num2 + num3);
double num5 = num4 / ellipticArc.MinorMajorRatio;
Vector3d vector3d = new Vector3d(num5, 0.0, 0.0);
Vector3d vector3d2 = new Vector3d(0.0, num4, 0.0);
Vector3d vector3d3 = vector3d.RotateBy(ellipticArc.Rotation, Vector3d.ZAxis);
Vector3d vector3d4 = vector3d2.RotateBy(ellipticArc.Rotation, Vector3d.ZAxis);
Point3d point3d3 = GIS2CAD.ToCadPoint3d(pointN);
EllipticalArc3d ellipticalArc3d = new EllipticalArc3d(point3d3, vector3d3, vector3d4, num5, num4);
double num6 = ellipticalArc3d.GetParameterOf(point3d);
double num7 = ellipticalArc3d.GetParameterOf(point3d2);
if (!ellipticArc.IsCounterClockwise)
{
double num8 = num6;
num6 = num7;
num7 = num8;
}
return(new Ellipse(point3d3, Vector3d.ZAxis, vector3d3, ellipticArc.MinorMajorRatio, num6, num7));
}
private static void TransformToEllipseStd(ref EllipticArc arc)
{
PointN pointN = (PointN)arc.CenterPoint;
if (double.IsNaN(pointN.Z))
{
pointN.Z = 0.0;
}
PointN fromPoint = (PointN)arc.FromPoint;
PointN toPoint = (PointN)arc.ToPoint;
AGSEllipticalArc.TransformToEllipseStd(ref fromPoint, pointN, arc.Rotation);
AGSEllipticalArc.TransformToEllipseStd(ref toPoint, pointN, arc.Rotation);
arc.FromPoint = fromPoint;
arc.ToPoint = toPoint;
}
