/// <summary>Создание дуг</summary>
private void CreateArcs(XElement root, Transaction tr, BlockTableRecord btr)
{
foreach (XElement curveXelement in root.Elements("Arc"))
{
XElement startPointXElement = curveXelement.Element("StartPoint");
Point3d startPoint = startPointXElement.GetAsPoint();
XElement endPointXElement = curveXelement.Element("EndPoint");
Point3d endPoint = endPointXElement.GetAsPoint();
XElement pointOnArcXElement = curveXelement.Element("PointOnArc");
Point3d pointOnArc = pointOnArcXElement.GetAsPoint();
// create a CircularArc3d
CircularArc3d carc = new CircularArc3d(startPoint, pointOnArc, endPoint);
// now convert the CircularArc3d to an Arc
Point3d cpt = carc.Center;
Vector3d normal = carc.Normal;
Vector3d refVec = carc.ReferenceVector;
Plane plan = new Plane(cpt, normal);
double ang = refVec.AngleOnPlane(plan);
using (Arc arc = new Arc(cpt, normal, carc.Radius, carc.StartAngle + ang, carc.EndAngle + ang))
{
btr.AppendEntity(arc);
tr.AddNewlyCreatedDBObject(arc, true);
}
// dispose CircularArc3d
carc.Dispose();
}
}
public static Arc CreateArcFromRadius(this Editor acCurEd, Point3d startPoint, Point3d endPoint, double radius)
{
Arc arc = null;
var ucsMat = acCurEd.CurrentUserCoordinateSystem;
var vNormal = ucsMat.CoordinateSystem3d.Zaxis;
var pStart = startPoint.TransformBy(ucsMat); // Start point in WCS
var pEnd = endPoint.TransformBy(ucsMat); // End point in WCS
// Finding center point of arc.
var circ1 = new CircularArc3d(pStart, vNormal, radius);
var circ2 = new CircularArc3d(pEnd, vNormal, radius);
var pts = circ1.IntersectWith(circ2);
circ1.Dispose();
circ2.Dispose();
try
{
if (pts.Length < 1)
{
return(null);
}
}
catch (Exception)
{
return(null);
}
var pCenter = pts[0];
Vector3d v1 = pStart - pCenter, v2 = pEnd - pCenter;
if (v1.CrossProduct(v2).DotProduct(vNormal) < 0)
{
pCenter = pts[1];
}
var cCirc = new CircularArc3d(pCenter, vNormal, radius);
var parStart = cCirc.GetParameterOf(pStart);
var parEnd = cCirc.GetParameterOf(pEnd);
var parMid = (parStart + parEnd) * 0.5;
var pMid = cCirc.EvaluatePoint(parMid);
cCirc.Dispose();
var cArc = new CircularArc3d(pStart, pMid, pEnd);
var angle =
cArc.ReferenceVector.AngleOnPlane(new Plane(cArc.Center, cArc.Normal));
arc = new Arc(cArc.Center, cArc.Normal, cArc.Radius, cArc.StartAngle + angle, cArc.EndAngle + angle);
cArc.Dispose();
return(arc);
}