public static IEnumerable <GeometryBase> ToRhino(this DB.GeometryObject geometry)
{
var scaleFactor = Revit.ModelUnits;
switch (geometry)
{
case DB.GeometryElement element:
foreach (var g in element.SelectMany(x => x.ToRhino()))
{
yield return(g);
}
break;
case DB.GeometryInstance instance:
var xform = instance.Transform.ToRhino().ChangeUnits(scaleFactor);
foreach (var g in instance.SymbolGeometry.ToRhino())
{
g?.Transform(xform);
yield return(g);
}
break;
case DB.Mesh mesh:
var m = mesh.ToRhino();
yield return(m?.ChangeUnits(scaleFactor));
break;
case DB.Solid solid:
var s = solid.ToRhino();
yield return(s?.ChangeUnits(scaleFactor));
break;
case DB.Curve curve:
var c = curve.ToRhino();
yield return(c?.ChangeUnits(scaleFactor));
break;
case DB.PolyLine polyline:
var p = new PolylineCurve(polyline.GetCoordinates().ToRhino());
yield return(p?.ChangeUnits(scaleFactor));
break;
}
}