public static void PlaneSlice(this Brep brep, Plane sliceplane, ref List <Curve> curves)
{
//brep.Faces.StandardizeFaceSurfaces();
//BrepSolidOrientation bso = brep.SolidOrientation;
Curve[] xCrvs;
Point3d[] xPts;
bool[] inside;
Rhino.Geometry.Intersect.Intersection.BrepPlane(brep, sliceplane, 0.001, out xCrvs, out xPts);
if (xCrvs == null)
{
return;
}
xCrvs = Rhino.Geometry.Curve.JoinCurves(xCrvs);
curves = new List <Curve>();
inside = new bool[xCrvs.Length];
for (int i = 0; i < xCrvs.Length; ++i)
{
//int sign = 1;
Point3d tpt = xCrvs[i].PointAtNormalizedLength(0.5);
Vector3d n = brep.ClosestNormal(tpt);
n = n.ProjectToPlane(sliceplane);
tpt.Transform(Transform.Translation(n * 0.001));
PointContainment pcon = xCrvs[i].Contains(tpt, sliceplane, 0.0001);
if (pcon == PointContainment.Inside)
{
inside[i] = true;
//sign = -1;
}
else
{
inside[i] = false;
//sign = 1;
}
curves.Add(xCrvs[i]);
Curve[] offsets = xCrvs[i].Offset(tpt, sliceplane.ZAxis, 3.0, 0.0001, CurveOffsetCornerStyle.Sharp);
//Curve[] offsets = xCrvs[i].Offset(sliceplane, 3.0 * sign, 0.001, CurveOffsetCornerStyle.Sharp);
curves.AddRange(offsets);
}
return;
}
