public Arc ArcToSpeckle(DB.Arc arc, string units = null)
{
var u = units ?? ModelUnits;
// see https://forums.autodesk.com/t5/revit-api-forum/how-to-retrieve-startangle-and-endangle-of-arc-object/td-p/7637128
var arcPlane = DB.Plane.CreateByOriginAndBasis(arc.Center, arc.XDirection, arc.YDirection);
XYZ center = arc.Center;
XYZ dir0 = (arc.GetEndPoint(0) - center).Normalize();
XYZ dir1 = (arc.GetEndPoint(1) - center).Normalize();
XYZ start = arc.Evaluate(0, true);
XYZ end = arc.Evaluate(1, true);
XYZ mid = arc.Evaluate(0.5, true);
double startAngle = arc.XDirection.AngleOnPlaneTo(dir0, arc.Normal);
double endAngle = arc.XDirection.AngleOnPlaneTo(dir1, arc.Normal);
var a = new Arc(PlaneToSpeckle(arcPlane, u), u == Units.None ? arc.Radius : ScaleToSpeckle(arc.Radius), startAngle, endAngle, endAngle - startAngle, u);
a.endPoint = PointToSpeckle(end, u);
a.startPoint = PointToSpeckle(start, u);
a.midPoint = PointToSpeckle(mid, u);
a.length = ScaleToSpeckle(arc.Length);
a.domain = new Interval(arc.GetEndParameter(0), arc.GetEndParameter(1));
return(a);
}
public Arc ArcToSpeckle(DB.Arc arc)
{
// see https://forums.autodesk.com/t5/revit-api-forum/how-to-retrieve-startangle-and-endangle-of-arc-object/td-p/7637128
var arcPlane = DB.Plane.CreateByNormalAndOrigin(arc.Normal, arc.Center);
XYZ center = arc.Center;
XYZ dir0 = (arc.GetEndPoint(0) - center).Normalize();
XYZ dir1 = (arc.GetEndPoint(1) - center).Normalize();
XYZ start = arc.Evaluate(0, true);
XYZ end = arc.Evaluate(1, true);
XYZ mid = arc.Evaluate(0.5, true);
double startAngle = dir0.AngleOnPlaneTo(arc.XDirection, arc.Normal);
double endAngle = dir1.AngleOnPlaneTo(arc.XDirection, arc.Normal);
var a = new Arc(PlaneToSpeckle(arcPlane), ScaleToSpeckle(arc.Radius), startAngle, endAngle, endAngle - startAngle, ModelUnits);
a.endPoint = PointToSpeckle(end);
a.startPoint = PointToSpeckle(start);
a.midPoint = PointToSpeckle(mid);
return(a);
}