//--------------------------------------------------------------------------------------------------
void _AddBezierSegment(SketchSegmentBezier bezierSegment)
{
if (_Document.Flags.HasFlag(DxfFlags.ExportSplineAsPolygon))
{
var curve = bezierSegment.MakeCurve(_Sketch.Points);
if (curve == null)
{
Messages.Error($"Cannot make curve for converting bezier segment to polyline.");
return;
}
_AddPolygonCurve(curve);
}
else
{
var pointCount = bezierSegment.Points.Length;
var knots = new double[pointCount * 2];
knots.Fill(0, pointCount, 0.0);
knots.Fill(pointCount, pointCount, 1.0);
var points = bezierSegment.Points.Select(idx => _Sketch.Points[idx]).ToArray();
var entity = new DxfDomSpline("0", pointCount - 1, knots, points, null, DxfDomSpline.SplineFlags.None);
_Document.Entities.Add(entity);
}
}
//--------------------------------------------------------------------------------------------------
void _ImportSplineWithFitPoints(DxfDomSpline dxfSpline)
{
// Copy points
var pointCount = dxfSpline.FitPoints.Length;
var points = new TColgp_HArray1OfPnt2d(1, pointCount);
for (int i = 0; i < pointCount; i++)
{
points.SetValue(i + 1, dxfSpline.FitPoints[i]);
}
// Interpolate
var algo = new Geom2dAPI_Interpolate(points, false, 0.001);
if (dxfSpline.HasTangents)
{
algo.Load(dxfSpline.StartTangent, dxfSpline.EndTangent);
}
algo.Perform();
if (!algo.IsDone())
{
Messages.Warning("DxfImporter: Cannot create spline through fit points.");
return;
}
_AddBSplineCurve(algo.Curve());
}
//--------------------------------------------------------------------------------------------------
void _ImportSpline(DxfDomSpline dxfSpline)
{
if (dxfSpline.ControlPoints.Length > 0 && dxfSpline.Knots.Length > 0)
{
_ImportSplineWithControlPoints(dxfSpline);
}
else if (dxfSpline.FitPoints.Length > 0)
{
_ImportSplineWithFitPoints(dxfSpline);
}
}
//--------------------------------------------------------------------------------------------------
void IDrawingRenderer.BSplineCurve(int degree, double[] knots, Pnt2d[] controlPoints, double[] weights, bool isRational)
{
if (_Document.Flags.HasFlag(DxfFlags.ExportSplineAsPolygon))
{
var spline = Geom2dUtils.MakeBSplineCurve(degree, knots, controlPoints, weights, false);
_AddPolygonCurve(spline);
return;
}
var flags = isRational ? DxfDomSpline.SplineFlags.IsRational : DxfDomSpline.SplineFlags.None;
var entity = new DxfDomSpline(_CurrentLayerName, degree, knots, controlPoints, weights, flags);
_AddEntity(entity);
}
//--------------------------------------------------------------------------------------------------
void _ImportSplineWithControlPoints(DxfDomSpline dxfSpline)
{
var spline = Geom2dUtils.MakeBSplineCurve(dxfSpline.Degree, dxfSpline.Knots, dxfSpline.ControlPoints, dxfSpline.Weights, dxfSpline.Flags.Has(DxfDomSpline.SplineFlags.IsClosed));
_AddBSplineCurve(spline);
}
