//--------------------------------------------------------------------------------------------------
void _ImportEllipse(DxfDomEllipse dxfEllipse)
{
var centerPoint = dxfEllipse.CenterPoint;
var majorRimPoint = centerPoint.Translated(dxfEllipse.MajorAxisPointOffset.ToVec());
var minorRimPoint = centerPoint.Translated(dxfEllipse.MajorAxisPointOffset.ToVec().Rotated(90.0.ToRad()).Scaled(dxfEllipse.Ratio));
var centerIndex = _AddPoint(centerPoint, false);
var majorRimIndex = _AddPoint(majorRimPoint, false);
var minorRimIndex = _AddPoint(minorRimPoint, false);
if (majorRimIndex != minorRimIndex)
{
_Segments.Add(new SketchSegmentEllipse(centerIndex, majorRimIndex, minorRimIndex));
}
}
//--------------------------------------------------------------------------------------------------
void _ImportEllipticalArc(DxfDomEllipse dxfEllipse)
{
var centerPoint = dxfEllipse.CenterPoint;
var majorRimPoint = centerPoint.Translated(dxfEllipse.MajorAxisPointOffset.ToVec());
var minorRimPoint = centerPoint.Translated(dxfEllipse.MajorAxisPointOffset.ToVec().Rotated(90.0.ToRad()).Scaled(dxfEllipse.Ratio));
var ellipse = Geom2dUtils.MakeEllipse(centerPoint, majorRimPoint, minorRimPoint);
var bezierPointArray = Geom2dUtils.EllipticalArcToBezier(ellipse, dxfEllipse.StartParameter, dxfEllipse.EndParameter);
foreach (var bezierPoints in bezierPointArray)
{
var startPoint = _AddPoint(bezierPoints.p1);
var endPoint = _AddPoint(bezierPoints.p2);
_Segments.Add(new SketchSegmentBezier(startPoint, _AddPoint(bezierPoints.c1, false), _AddPoint(bezierPoints.c2, false), endPoint));
}
}
//--------------------------------------------------------------------------------------------------
void _AddEllipseSegment(SketchSegmentEllipse ellipseSegment)
{
var ellipse = ellipseSegment.GetEllipse(_Sketch.Points);
if (_Document.Flags.HasFlag(DxfFlags.ExportEllipseAsPolygon))
{
_AddPolygonCurve(new Geom2d_Ellipse(ellipse));
return;
}
var center = ellipse.Location();
var majorAxisPointOffset = ellipse.XAxis().Direction.ToVec().Multiplied(ellipse.MajorRadius()).ToPnt();
var ratio = ellipse.MinorRadius() / ellipse.MajorRadius();
var entity = new DxfDomEllipse("0", center, majorAxisPointOffset, ratio);
_Document.Entities.Add(entity);
}
//--------------------------------------------------------------------------------------------------
void _AddEllipse(Geom2d_Ellipse ellipse, double first, double last)
{
if (_Document.Flags.HasFlag(DxfFlags.ExportEllipseAsPolygon))
{
if (Math.Abs(last - first) < ellipse.Period())
{
// Elliptical arc
var trimmedCurve = new Geom2d_TrimmedCurve(ellipse, first, last);
_AddPolygonCurve(trimmedCurve);
}
else
{
// Full ellipse
_AddPolygonCurve(ellipse);
}
return;
}
var center = ellipse.Location();
var majorAxisPointOffset = ellipse.XAxis().Direction.ToVec().Multiplied(ellipse.MajorRadius());
var ratio = ellipse.MinorRadius() / ellipse.MajorRadius();
if (Math.Abs(last - first) < ellipse.Period())
{
// Elliptical arc
if (ellipse.Position().Sense() > 0)
{
var temp = first;
first = ellipse.Period() - last;
last = ellipse.Period() - temp;
}
var entity = new DxfDomEllipse(_CurrentLayer, center, majorAxisPointOffset.ToPnt(), ratio, first, last);
_Document.Entities.Add(entity);
}
else
{
// Full ellipse
var entity = new DxfDomEllipse(_CurrentLayer, center, majorAxisPointOffset.ToPnt(), ratio);
_Document.Entities.Add(entity);
}
}
//--------------------------------------------------------------------------------------------------
void _AddEllipticalArcSegment(SketchSegmentEllipticalArc arcSegment)
{
var parameter = new double[2];
var ellipse = arcSegment.GetEllipse(_Sketch.Points, parameter);
if (_Document.Flags.HasFlag(DxfFlags.ExportEllipseAsPolygon))
{
var trimmedCurve = new Geom2d_TrimmedCurve(new Geom2d_Ellipse(ellipse), parameter[0], parameter[1]);
_AddPolygonCurve(trimmedCurve);
return;
}
var center = ellipse.Location();
var majorAxisPointOffset = ellipse.XAxis().Direction.ToVec().Multiplied(ellipse.MajorRadius()).ToPnt();
var ratio = ellipse.MinorRadius() / ellipse.MajorRadius();
var entity = new DxfDomEllipse("0", center, majorAxisPointOffset, ratio, parameter[0], parameter[1]);
_Document.Entities.Add(entity);
}
//--------------------------------------------------------------------------------------------------
void _ReadEntities(DxfReader reader)
{
while (reader.GroupCode >= 0)
{
if (reader.GroupCode != 0)
{
reader.Skip();
continue;
}
var type = reader.ReadString()?.ToUpper();
if (type == null)
{
continue;
}
DxfDomEntity entity = null;
switch (type)
{
case "ENDSEC":
return;
case "LINE":
entity = new DxfDomLine();
break;
case "CIRCLE":
case "ARC":
entity = new DxfDomCircle();
break;
case "ELLIPSE":
entity = new DxfDomEllipse();
break;
case "LWPOLYLINE":
entity = new DxfDomLwPolyline();
break;
case "POLYLINE":
entity = new DxfDomPolyline();
break;
case "SPLINE":
entity = new DxfDomSpline();
break;
}
if (entity == null)
{
continue;
}
if (entity.Read(reader))
{
Entities.Add(entity);
}
else
{
Messages.Error($"DxfReader: Incomplete entity description at line {reader.Line}.");
}
}
}
