Point3dCollection ArcToVectors(CircularArc3d arc, int numSegments)
{
Interval interval = arc.GetInterval();
double increment = interval.Length / (double)numSegments;
double controller = interval.LowerBound;
Point3dCollection points = new Point3dCollection();
for (int i = 0; i < numSegments; ++i)
{
points.Add(arc.EvaluatePoint(controller));
controller += increment;
}
points.Add(arc.EvaluatePoint(controller));
return(points);
}
// Arc
public Arc ArcToSpeckle(CircularArc3d arc)
{
var interval = arc.GetInterval();
var _arc = new Arc(PlaneToSpeckle(arc.GetPlane()), arc.Radius, arc.StartAngle, arc.EndAngle, Math.Abs(arc.EndAngle - arc.StartAngle), ModelUnits);
_arc.startPoint = PointToSpeckle(arc.StartPoint);
_arc.endPoint = PointToSpeckle(arc.EndPoint);
_arc.midPoint = PointToSpeckle(arc.EvaluatePoint((interval.UpperBound - interval.LowerBound) / 2));
_arc.domain = IntervalToSpeckle(arc.GetInterval());
_arc.length = arc.GetLength(arc.GetParameterOf(arc.StartPoint), arc.GetParameterOf(arc.EndPoint), tolerance);
_arc.bbox = BoxToSpeckle(arc.OrthoBoundBlock);
return(_arc);
}
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);
}