// Method for polyline extension
private bool ExtendPolyLine(ICurve lineCurve, ICurve boundary, bool nearStart)
{
LinearPath line = secondSelectedEntity as LinearPath;
Point3D[] tempVertices = line.Vertices;
// create temp line with proper direction
Line tempLine = new Line(line.StartPoint, line.StartPoint);
Vector3D direction = new Vector3D(line.Vertices[1], line.StartPoint);
if (!nearStart)
{
tempLine = new Line(line.EndPoint, line.EndPoint);
direction = new Vector3D(line.Vertices[line.Vertices.Length - 2], line.EndPoint);
}
direction.Normalize();
tempLine.EndPoint = tempLine.EndPoint + direction * extensionLength;
#if NURBS
Point3D[] intersetionPoints = Curve.Intersection(boundary, tempLine);
if (intersetionPoints.Length == 0)
{
intersetionPoints = Curve.Intersection(GetExtendedBoundary(boundary), tempLine);
}
if (intersetionPoints.Length > 0)
{
if (nearStart)
{
tempVertices[0] = GetClosestPoint(line.StartPoint, intersetionPoints);
}
else
{
tempVertices[tempVertices.Length - 1] = GetClosestPoint(line.EndPoint, intersetionPoints);
}
line.Vertices = tempVertices;
AddAndRefresh((Entity)line.Clone(), ((Entity)lineCurve).LayerName);
return(true);
}
#endif
return(false);
}
