public BrepLoop(Brep brep, int faceIndex, List <int> trimIndices, BrepLoopType type)
{
Brep = brep;
FaceIndex = faceIndex;
TrimIndices = trimIndices;
Type = type;
}
public static Curve[] _GetEdgesWithDirectionsSameAsTrims(this Surface srf, BrepLoopType loopType, Curve[] loopEdges)
{
// duplicate edges coz we want to edit curves (reverse some of them)
var crvs = loopEdges.Select(o => o.DuplicateCurve()).ToArray();
// connect them together
for (var i = 1; i < crvs.Length; i++)
{
var iPrev = i - 1;
var crv = crvs[i];
var crvPrev = crvs[iPrev];
CurvesConnectionInfo connectionInfo;
crv._AreConnected(crvPrev, out connectionInfo, 10000);
if (connectionInfo.Crv1End == connectionInfo.Crv2End)
{
crv.Reverse();
}
}
// Join them into 1 curve
var jC = Curve.JoinCurves(crvs, 100);// we must tell tollerance to be independed from document tolerance
// enshure orientation of curves are same as should be for trims: clockwise for Outer loops, and CounterClockwise for Inner loops
if (jC.Length == 1)
{
//Layers.Debug.AddCurve(jC[0], Color.Red, ObjectDecoration.EndArrowhead);
var loopCentroid = srf._GetCentroid(loopEdges, true);
var normal = srf._NormalAt(loopCentroid);
//Layers.Debug.AddNormal(srf.PointAt(u, v), normal, Color.Red, "_GetEdgesWithDirectionsSameAsTrims - loop centroid normal");
var orientation = jC[0].ClosedCurveOrientation(normal);
var needOrientation = (loopType == BrepLoopType.Outer)
? CurveOrientation.Clockwise
: CurveOrientation.CounterClockwise;
if (orientation != needOrientation)
{
foreach (var crv in crvs)
{
crv.Reverse();
}
}
}
else
{
log.wrong("_BrepLoop._GetEdgesWithDirectionsSameAsTrims failed to join {0} curves", loopEdges.Length);
}
return(crvs);
}
