/***************************************************/
public static BHG.ICurve FromRhino(this RHG.Curve rCurve)
{
if (rCurve == null)
{
return(null);
}
Type curveType = rCurve.GetType();
if (rCurve.IsLinear() && rCurve.SpanCount < 2)
{
return(new BHG.Line {
Start = rCurve.PointAtStart.FromRhino(), End = rCurve.PointAtEnd.FromRhino(), Infinite = false
});
}
if (rCurve.IsCircle())
{
RHG.Circle circle = new RHG.Circle();
rCurve.TryGetCircle(out circle);
return(circle.FromRhino());
}
else if (rCurve.IsArc() || typeof(RHG.ArcCurve).IsAssignableFrom(curveType))
{
RHG.Arc arc = new RHG.Arc();
rCurve.TryGetArc(out arc);
return(arc.FromRhino());
}
else if (rCurve.IsPolyline() || typeof(RHG.PolylineCurve).IsAssignableFrom(curveType))
{
RHG.Polyline polyline = new RHG.Polyline();
rCurve.TryGetPolyline(out polyline);
return(polyline.FromRhino());
}
else if (rCurve.IsClosed && rCurve.IsEllipse())
{
RHG.Ellipse ellipse = new RHG.Ellipse();
rCurve.TryGetEllipse(out ellipse);
return(ellipse.FromRhino());
}
else if (rCurve is RHG.NurbsCurve)
{
return(((RHG.NurbsCurve)rCurve).FromRhino());
}
else if (rCurve is RHG.PolyCurve)
{
return(((RHG.PolyCurve)rCurve).FromRhino()); //The test of IsPolyline above is very important to make sure we can cast to PolyCurve here
}
else
{
return((rCurve.ToNurbsCurve()).FromRhino());
}
}
/***************************************************/
private static BHG.ICurve ToBHoMTrimCurve(this RHG.Curve curve)
{
if (curve.IsArc())
{
RHG.Arc arc;
curve.TryGetArc(out arc);
return(arc.FromRhino());
}
else
{
return(curve.FromRhino());
}
}
/// <summary>
/// Convert a Rhino curve to a Nucleus one
/// </summary>
/// <param name="curve"></param>
/// <returns></returns>
public static Curve Convert(RC.Curve curve)
{
if (curve == null)
{
return(null);
}
if (curve is RC.LineCurve)
{
return(Convert((RC.LineCurve)curve));
}
else if (curve.IsLinear())
{
return(Convert(new RC.Line(curve.PointAtStart, curve.PointAtEnd)));
}
else if (curve.IsPolyline())
{
RC.Polyline pLine;
if (curve.TryGetPolyline(out pLine))
{
return(Convert(pLine));
}
}
else if (curve is RC.PolyCurve)
{
return(Convert((RC.PolyCurve)curve));
}
else if (curve.IsArc())
{
RC.Arc arc;
if (curve.TryGetArc(out arc))
{
return(Convert(arc));
}
}
throw new NotImplementedException();
}
private LyrebirdCurve GetLBCurve(Curve crv)
{
LyrebirdCurve lbc = null;
List<LyrebirdPoint> points = new List<LyrebirdPoint>();
if (crv.IsLinear())
{
// standard linear element
points.Add(new LyrebirdPoint(crv.PointAtStart.X, crv.PointAtStart.Y, crv.PointAtStart.Z));
points.Add(new LyrebirdPoint(crv.PointAtEnd.X, crv.PointAtEnd.Y, crv.PointAtEnd.Z));
lbc = new LyrebirdCurve(points, "Line");
}
else if (crv.IsCircle())
{
crv.Domain = new Interval(0, 1);
points.Add(new LyrebirdPoint(crv.PointAtStart.X, crv.PointAtStart.Y, crv.PointAtStart.Z));
points.Add(new LyrebirdPoint(crv.PointAt(0.25).X, crv.PointAt(0.25).Y, crv.PointAt(0.25).Z));
points.Add(new LyrebirdPoint(crv.PointAt(0.5).X, crv.PointAt(0.5).Y, crv.PointAt(0.5).Z));
points.Add(new LyrebirdPoint(crv.PointAt(0.75).X, crv.PointAt(0.75).Y, crv.PointAt(0.75).Z));
points.Add(new LyrebirdPoint(crv.PointAtEnd.X, crv.PointAtEnd.Y, crv.PointAtEnd.Z));
lbc = new LyrebirdCurve(points, "Circle");
}
else if (crv.IsArc())
{
crv.Domain = new Interval(0, 1);
// standard arc element
points.Add(new LyrebirdPoint(crv.PointAtStart.X, crv.PointAtStart.Y, crv.PointAtStart.Z));
points.Add(new LyrebirdPoint(crv.PointAt(0.5).X, crv.PointAt(0.5).Y, crv.PointAt(0.5).Z));
points.Add(new LyrebirdPoint(crv.PointAtEnd.X, crv.PointAtEnd.Y, crv.PointAtEnd.Z));
lbc = new LyrebirdCurve(points, "Arc");
}
else
{
// Spline
// Old line: if (crv.Degree >= 3)
if (crv.Degree == 3)
{
NurbsCurve nc = crv as NurbsCurve;
if (nc != null)
{
List<LyrebirdPoint> lbPoints = new List<LyrebirdPoint>();
List<double> weights = new List<double>();
List<double> knots = new List<double>();
foreach (ControlPoint cp in nc.Points)
{
LyrebirdPoint pt = new LyrebirdPoint(cp.Location.X, cp.Location.Y, cp.Location.Z);
double weight = cp.Weight;
lbPoints.Add(pt);
weights.Add(weight);
}
for (int k = 0; k < nc.Knots.Count; k++)
{
double knot = nc.Knots[k];
// Add a duplicate knot for the first and last knot in the Rhino curve.
// Revit needs 2 more knots than Rhino to define a spline.
if (k == 0 || k == nc.Knots.Count - 1)
{
knots.Add(knot);
}
knots.Add(knot);
}
lbc = new LyrebirdCurve(lbPoints, weights, knots, nc.Degree, nc.IsPeriodic) { CurveType = "Spline" };
}
}
else
{
const double incr = 1.0 / 100;
List<LyrebirdPoint> pts = new List<LyrebirdPoint>();
List<double> weights = new List<double>();
for (int i = 0; i <= 100; i++)
{
Point3d pt = crv.PointAtNormalizedLength(i * incr);
LyrebirdPoint lbp = new LyrebirdPoint(pt.X, pt.Y, pt.Z);
weights.Add(1.0);
pts.Add(lbp);
}
lbc = new LyrebirdCurve(pts, "Spline") { Weights = weights, Degree = crv.Degree };
}
}
return lbc;
}
