/***************************************************/
/**** Public Methods ****/
/***************************************************/
public static Polyline ClipPolylines(Polyline subject, Polyline clip)
{
Polyline clippedPolyline = new Polyline();
var clippedPoints = GetIntersectedPolygon(subject.ControlPoints, clip.ControlPoints);
if (clippedPoints.Count > 0)
{
clippedPoints.Add(clippedPoints[0]);
}
clippedPolyline = Create.Polyline(clippedPoints);
return(clippedPolyline);
}
public static Polyline Extend(this Polyline curve, double start = 0.0, double end = 0.0, bool tangentExtensions = false, double tolerance = Tolerance.Distance)
{
if (curve.IsClosed(tolerance))
{
Reflection.Compute.RecordNote("Cannot Trim or Extend closed curves.");
return(curve);
}
if (start + end + curve.Length() < tolerance)
{
Reflection.Compute.RecordError("Negative extend values are smaller than curve length.");
return(null);
}
Polyline result = new Polyline();
List <Line> lines = curve.SubParts();
if (start < 0 && -start > lines[0].ILength())
{
double startCut = -lines[0].ILength();
while (startCut > start && lines.Count > 1)
{
lines.RemoveAt(0);
startCut -= lines[0].ILength();
}
startCut += lines[0].ILength();
if (lines.Count > 1)
{
lines[0] = lines[0].Extend(start - startCut, 0, false, tolerance);
}
else
{
lines[0] = lines[0].Extend(start - startCut, end, tangentExtensions, tolerance);
result = Create.Polyline(lines);
return(result);
}
}
else
{
lines[0] = lines[0].Extend(start, 0, tangentExtensions, tolerance);
}
if (end < 0 && -end > lines[lines.Count - 1].ILength())
{
double endCut = -lines[lines.Count - 1].ILength();
while (endCut > end)
{
lines.RemoveAt(lines.Count - 1);
endCut -= lines[lines.Count - 1].ILength();
}
endCut += lines[lines.Count - 1].ILength();
lines[lines.Count - 1] = lines[lines.Count - 1].Extend(0, end - endCut, tangentExtensions, tolerance);
}
else
{
lines[lines.Count - 1] = lines[lines.Count - 1].Extend(0, end, tangentExtensions, tolerance);
}
result = Create.Polyline(lines);
return(result);
}