private Ellipse CreateEllipticalArc(Core2D.Shapes.XArc arc, double dx, double dy)
{
var a = Core2D.Math.Arc.GdiArc.FromXArc(arc, dx, dy);
double _cx = ToDxfX(a.X + a.Width / 2.0);
double _cy = ToDxfY(a.Y + a.Height / 2.0);
double minor = Math.Min(a.Height, a.Width);
double major = Math.Max(a.Height, a.Width);
double startAngle = -a.EndAngle;
double endAngle = -a.StartAngle;
double rotation = 0;
if (a.Height > a.Width)
{
startAngle += 90;
endAngle += 90;
rotation = -90;
}
return(new Ellipse()
{
Center = new Vector3(_cx, _cy, 0),
MajorAxis = major,
MinorAxis = minor,
StartAngle = startAngle,
EndAngle = endAngle,
Rotation = rotation
});
}
/// <inheritdoc/>
public override void Draw(object dc, Core2D.Shapes.XArc arc, double dx, double dy, ImmutableArray <Core2D.Data.XProperty> db, Core2D.Data.Database.XRecord r)
{
var _gfx = dc as XGraphics;
var a = Core2D.Math.Arc.GdiArc.FromXArc(arc, dx, dy);
if (arc.IsFilled)
{
var path = new XGraphicsPath();
// NOTE: Not implemented in PdfSharp Core version.
path.AddArc(
_scaleToPage(a.X),
_scaleToPage(a.Y),
_scaleToPage(a.Width),
_scaleToPage(a.Height),
a.StartAngle,
a.SweepAngle);
if (arc.IsStroked)
{
_gfx.DrawPath(
ToXPen(arc.Style, _scaleToPage, _sourceDpi, _targetDpi),
ToXSolidBrush(arc.Style.Fill),
path);
}
else
{
_gfx.DrawPath(
ToXSolidBrush(arc.Style.Fill),
path);
}
}
else
{
if (arc.IsStroked)
{
_gfx.DrawArc(
ToXPen(arc.Style, _scaleToPage, _sourceDpi, _targetDpi),
_scaleToPage(a.X),
_scaleToPage(a.Y),
_scaleToPage(a.Width),
_scaleToPage(a.Height),
a.StartAngle,
a.SweepAngle);
}
}
}
/// <inheritdoc/>
public override void Draw(object dc, Core2D.Shapes.XArc arc, double dx, double dy, ImmutableArray <Core2D.Data.XProperty> db, Core2D.Data.Database.XRecord r)
{
var dxf = dc as DxfDocument;
var style = arc.Style;
var dxfEllipse = CreateEllipticalArc(arc, dx, dy);
if (arc.IsFilled)
{
var fill = ToColor(style.Fill);
var fillTransparency = ToTransparency(style.Fill);
// TODO: The netDxf does not create hatch for Ellipse with end angle equal to 360.
var bounds =
new List <HatchBoundaryPath>
{
new HatchBoundaryPath(
new List <EntityObject>
{
(Ellipse)dxfEllipse.Clone()
})
};
var hatch = new Hatch(HatchPattern.Solid, bounds, false);
hatch.Layer = _currentLayer;
hatch.Color = fill;
hatch.Transparency.Value = fillTransparency;
dxf.AddEntity(hatch);
}
if (arc.IsStroked)
{
var stroke = ToColor(style.Stroke);
var strokeTansparency = ToTransparency(style.Stroke);
var lineweight = ToLineweight(style.Thickness);
dxfEllipse.Layer = _currentLayer;
dxfEllipse.Color = stroke;
dxfEllipse.Transparency.Value = strokeTansparency;
dxfEllipse.Lineweight = lineweight;
dxf.AddEntity(dxfEllipse);
}
}
