public static bool Import(Stream stream, out IDictionary <int, Pnt2d> points, out IDictionary <int, SketchSegment> segments,
DxfFlags flags = DxfFlags.None, double precision = 0.01, double scale = 1.0)
{
var importer = new DxfSketchImporter();
return(importer._Import(stream, out points, out segments, flags, precision, scale));
}
public static MemoryStream Export(Drawing drawing,
DxfVersion version, DxfFlags flags = DxfFlags.None, double precision = 0.01)
{
var exporter = new DxfDrawingExporter();
return(exporter._Export(drawing, version, flags, precision));
}
public static MemoryStream Export(VectorExportTemplate template, VectorExportLayer[] layers,
DxfVersion version, DxfFlags flags = DxfFlags.None, double precision = 0.01)
{
var exporter = new DxfVectorExporter();
return(exporter._Export(template, layers, version, flags, precision));
}
//--------------------------------------------------------------------------------------------------
void _ReadFromBytes(byte[] bytes, Sketch sketch, bool replace, DxfFlags flags = DxfFlags.None, double scale = 1.0)
{
Assert.IsTrue(DxfSketchImporter.Import(new MemoryStream(bytes), out var points, out var segments, flags, 0.01, scale));
if (replace && points?.Count > 0)
{
sketch.Clear();
}
sketch.AddElements(points, null, segments, null);
}
//--------------------------------------------------------------------------------------------------
MemoryStream _Export(Drawing drawing, DxfVersion version, DxfFlags flags, double precision)
{
_Precision = precision;
_Document = new DxfDomDocument(version, flags);
// Export
drawing.Render(this);
var stream = _Document.WriteToStream();
_Document = null;
return(stream);
}
//--------------------------------------------------------------------------------------------------
#endregion
#region c'tor
public DxfDomDocument(DxfVersion version = DxfVersion.Latest, DxfFlags flags = DxfFlags.None)
{
Version = version == DxfVersion.Latest ? DxfVersion.AC1015 : version;
Flags = flags;
if (Version < DxfVersion.AC1012)
{
Flags = flags.Added(DxfFlags.ExportSplineAsPolygon)
.Added(DxfFlags.ExportEllipseAsPolygon);
}
Layers.Add(new DxfDomLayer("0"));
Linetypes.Add(new DxfDomLinetype("BYBLOCK", "", 0.0, new double[0]));
Linetypes.Add(new DxfDomLinetype("BYLAYER", "", 0.0, new double[0]));
Linetypes.Add(new DxfDomLinetype("CONTINUOUS", "Solid line", 0.0, new double[0]));
}
//--------------------------------------------------------------------------------------------------
MemoryStream _Export(VectorExportTemplate template, VectorExportLayer[] layers,
DxfVersion version, DxfFlags flags, double precision)
{
_Precision = precision;
_Document = new DxfDomDocument(version, flags);
_AddLinetypes(template);
// Export
foreach (var layer in layers)
{
_ExportLayer(layer);
}
var stream = _Document.WriteToStream();
_Document = null;
return(stream);
}
//--------------------------------------------------------------------------------------------------
#region Helper
MemoryStream RunExporter(bool useTriangulation, Ax3 projection, TopoDS_Shape[] shapes,
DxfVersion version = DxfVersion.Latest, DxfFlags flags = DxfFlags.None)
{
var helper = new DrawingExportHelper(useTriangulation, projection);
helper.IncludeEdgeType(HlrEdgeType.VisibleSharp);
helper.IncludeEdgeType(HlrEdgeType.VisibleOutline);
helper.IncludeEdgeType(HlrEdgeType.VisibleSmooth);
helper.IncludeEdgeType(HlrEdgeType.HiddenSharp);
helper.IncludeEdgeType(HlrEdgeType.HiddenOutline);
var layers = helper.PrepareExportLayers(shapes);
if (layers == null || layers.Length == 0)
{
return(new MemoryStream("!HLRExporterError!".ToUtf8Bytes()));
}
return(DxfVectorExporter.Export(VectorExportTemplate.Drawing, layers, version, flags));
}
//--------------------------------------------------------------------------------------------------
MemoryStream _Export(Sketch sketch, DxfVersion version, DxfFlags flags, double precision)
{
_Sketch = sketch;
_Precision = precision;
_Document = new DxfDomDocument(version, flags);
foreach (var segment in _Sketch.Segments.Values)
{
switch (segment)
{
case SketchSegmentLine line:
_AddLineSegment(line);
break;
case SketchSegmentCircle circle:
_AddCircleSegment(circle);
break;
case SketchSegmentArc arc:
_AddArcSegment(arc);
break;
case SketchSegmentEllipse ellipse:
_AddEllipseSegment(ellipse);
break;
case SketchSegmentEllipticalArc ellipArc:
_AddEllipticalArcSegment(ellipArc);
break;
case SketchSegmentBezier bezier:
_AddBezierSegment(bezier);
break;
}
}
var stream = _Document.WriteToStream();
_Document = null;
return(stream);
}
//--------------------------------------------------------------------------------------------------
#endregion
#region Importer
bool _Import(Stream stream, out IDictionary <int, Pnt2d> points, out IDictionary <int, SketchSegment> segments,
DxfFlags flags, double precision, double scale)
{
points = null;
segments = null;
try
{
_MergePrecision = precision;
_Document = new DxfDomDocument(DxfVersion.Latest, flags);
if (!_Document.ReadFromStream(stream, scale))
{
Messages.Error("DxfImporter: The DXF document is invalid or does not contain any importable entities.");
_Document = null;
return(false);
}
// Iterate through children
foreach (var entity in _Document.Entities)
{
_ImportEntity(entity);
}
if (_Segments.Count == 0)
{
Messages.Error("DxfImporter: Could not find any usable elements in DXF data.");
return(false);
}
points = _Points;
segments = _Segments.ToIndexedDictionary();
return(true);
}
catch (Exception e)
{
Messages.Exception("DxfImporter: An exception occured while importing the dxf file.", e);
return(false);
}
}
public static MemoryStream Export(Sketch sketch, DxfVersion version, DxfFlags flags, double precision = 0.01)
{
var exporter = new DxfSketchExporter();
return(exporter._Export(sketch, version, flags, precision));
}
//--------------------------------------------------------------------------------------------------
#region Helper
MemoryStream RunExporter(bool useTriangulation, Ax3 projection, DxfVersion version, DxfFlags flags, params Body[] bodies)
{
var hlrEdgeTypes = HlrEdgeTypes.VisibleSharp | HlrEdgeTypes.VisibleOutline | HlrEdgeTypes.VisibleSmooth
| HlrEdgeTypes.HiddenSharp | HlrEdgeTypes.HiddenOutline;
IBrepSource[] sources = bodies.Select(body => (IBrepSource) new BodyBrepSource(body)).ToArray();
var hlrBrepDrawing = HlrDrawing.Create(projection, hlrEdgeTypes, sources);
hlrBrepDrawing.UseTriangulation = useTriangulation;
var drawing = new Drawing();
drawing.Add(hlrBrepDrawing);
return(DxfDrawingExporter.Export(drawing, version, flags));
}
