//--------------------------------------------------------------------------------------------------
void _ImportArc(DxfDomCircle dxfCircle)
{
Pnt2d center = dxfCircle.CenterPoint;
double radius = dxfCircle.Radius;
if (radius <= 0)
{
return;
}
var startParam = dxfCircle.StartAngle.ToRad();
var endParam = dxfCircle.EndAngle.ToRad();
if (endParam < startParam)
{
endParam += 2 * Math.PI;
}
var geomCircle = new Geom2d_Circle(new Ax2d(center, Dir2d.DX), radius);
var startIndex = _AddPoint(geomCircle.Value(startParam));
var endIndex = _AddPoint(geomCircle.Value(endParam));
var rimIndex = _AddPoint(geomCircle.Value(startParam.Lerp(endParam, 0.5)), false);
if (startIndex != endIndex)
{
_Segments.Add(new SketchSegmentArc(startIndex, endIndex, rimIndex));
}
}
//--------------------------------------------------------------------------------------------------
void _AddCircleSegment(SketchSegmentCircle circleSegment)
{
var p1 = _Sketch.Points[circleSegment.CenterPoint];
var radius = circleSegment.Radius(_Sketch.Points);
var entity = new DxfDomCircle("0", p1, radius);
_Document.Entities.Add(entity);
}
//--------------------------------------------------------------------------------------------------
void _ImportCircle(DxfDomCircle dxfCircle)
{
var centerIndex = _AddPoint(dxfCircle.CenterPoint, false);
double radius = dxfCircle.Radius;
if (radius <= 0)
{
return;
}
var rimIndex = _AddPoint(dxfCircle.CenterPoint.Translated(new Vec2d(radius, 0)), false);
if (centerIndex != rimIndex)
{
_Segments.Add(new SketchSegmentCircle(centerIndex, rimIndex));
}
}
//--------------------------------------------------------------------------------------------------
void _AddArcSegment(SketchSegmentArc arcSegment)
{
var circle = arcSegment.GetCircle(_Sketch.Points);
Pnt2d startPoint;
Pnt2d endPoint;
if (circle.Position().Sense() < 0)
{
startPoint = _Sketch.Points[arcSegment.StartPoint];
endPoint = _Sketch.Points[arcSegment.EndPoint];
}
else
{
startPoint = _Sketch.Points[arcSegment.EndPoint];
endPoint = _Sketch.Points[arcSegment.StartPoint];
}
var entity = new DxfDomCircle("0", circle.Location(), circle.Radius(), startPoint, endPoint);
_Document.Entities.Add(entity);
}
//--------------------------------------------------------------------------------------------------
void _AddCircle(Geom2d_Circle circle, double first, double last)
{
if (Math.Abs(last - first) < circle.Period())
{
// Circle arc
if (circle.Position().Sense() > 0)
{
var temp = first;
first = last;
last = temp;
}
var entity = new DxfDomCircle(_CurrentLayer, circle.Location(), circle.Radius(), circle.Value(first), circle.Value(last));
_Document.Entities.Add(entity);
}
else
{
// Full circle
var entity = new DxfDomCircle(_CurrentLayer, circle.Location(), circle.Radius());
_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}.");
}
}
}