protected override void DoWork(System.ComponentModel.BackgroundWorker worker, System.ComponentModel.DoWorkEventArgs doWorkEventArgs)
{
const int passCount = 50;
if (!UpdateProgressAndCheckCancelled(100, 100, "Triangulating surface 1/1", worker, doWorkEventArgs))
{
return;
}
Mesh m = surface.ConvertToMesh(tolerance);
// The plane used to slice the surface
Plane pln = Plane.YZ;
pln.Rotate(-Math.PI / 4, Vector3D.AxisZ);
pln.Translate(0, 60, 0);
List <Point3D> pointList = new List <Point3D>();
for (int i = 0; i < passCount; i++)
{
pln = pln.Offset(2);
ICurve[] sectionCurves = m.Section(pln, 0);
if (sectionCurves.Length > 0)
{
LinearPath pass = (LinearPath)sectionCurves[0];
ICurve[] offsetLp = pass.QuickOffset(ballToolRadius, pln);
if (offsetLp != null)
{
if (i % 2 == 1)
{
offsetLp[0].Reverse();
}
pointList.AddRange(((Entity)offsetLp[0]).Vertices);
}
}
if (!UpdateProgressAndCheckCancelled(i, passCount, "Computing passes", worker, doWorkEventArgs))
{
return;
}
}
// raises approach and retract
Point3D approach = (Point3D)pointList[0].Clone();
approach.Z += 20;
pointList.Insert(0, approach);
Point3D retract = (Point3D)pointList[pointList.Count - 1].Clone();
retract.Z += 40;
pointList.Add(retract);
// return the toolpath as a LinearPath entity
toolPath = new LinearPath(pointList);
}
