/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object can be used to retrieve data from input parameters and
/// to store data in output parameters.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
List <Curve> curveList = new List <Curve>();
DA.GetDataList(0, curveList);
//GH_Structure<GH_Activ> in_IDtree = new GH_Structure<Curve>();
double width = new double();
if (!DA.GetData(1, ref width))
{
width = .1;
}
double halfwidth = width / 2.0;
CurveOffsetCornerStyle cornerstyle = new CurveOffsetCornerStyle();
List <PolylineCurve> plines = new List <PolylineCurve>();
Vector3d normal = new Vector3d(0.0, 0.0, 1.0);
Point3d origin = new Point3d(0.0, 0.0, 0.0);
Plane plane = new Plane(origin, normal);
foreach (Curve c in curveList)
{
Polyline pl = new Polyline();
if (c.TryGetPolyline(out pl))
{
int segCount = pl.SegmentCount;
Line[] segments = pl.GetSegments();
foreach (Line l in segments)
{
l.Extend(halfwidth, halfwidth);
Curve crv = l.ToNurbsCurve();
Curve[] offset1 = crv.Offset(plane, halfwidth, 0.0, cornerstyle);
Curve[] offset2 = crv.Offset(plane, -halfwidth, 0.0, cornerstyle);
Point3d[] rect = new Point3d[5] {
offset1[0].PointAtStart, offset1[0].PointAtEnd, offset2[0].PointAtEnd, offset2[0].PointAtStart, offset1[0].PointAtStart
};
PolylineCurve plc = new PolylineCurve(rect);
plines.Add(plc);
}
}
}
// 2. Boolean Union
Curve[] final = PolylineCurve.CreateBooleanUnion(plines);
// 3. Set data back
DA.SetDataList(0, final);
}