//--------------------------------------------------------------------------------------------------
void _WriteClasses(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "CLASSES");
writer.Write(0, "ENDSEC");
}
public MemoryStream WriteToStream()
{
var writer = new DxfWriter(Version, Flags.HasFlag(DxfFlags.ExportBinaryFile));
Write(writer);
return(writer.Finish());
}
//--------------------------------------------------------------------------------------------------
void _WriteEntities(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "ENTITIES");
Entities.ForEach(entity => entity.Write(writer));
writer.Write(0, "ENDSEC");
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
writer.Write(0, "LINE");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, LayerName);
writer.WriteSubclass("AcDbLine");
writer.Write(10, StartPoint.X);
writer.Write(20, StartPoint.Y);
writer.Write(30, 0.0);
writer.Write(11, EndPoint.X);
writer.Write(21, EndPoint.Y);
writer.Write(31, 0.0);
}
//--------------------------------------------------------------------------------------------------
void _WriteHeader(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "HEADER");
writer.Write(9, "$ACADVER");
writer.Write(1, Version.ToString()); // AutoCad R13 (SPLINE,Layer.Lineweight)
writer.Write(9, "$HANDSEED");
writer.Write(5, "FFFFFF");
writer.Write(9, "$ANGDIR");
writer.Write(70, 1); // Clockwise Angles
writer.Write(9, "$MEASUREMENT");
writer.Write(70, 1); // Metric
writer.Write(0, "ENDSEC");
}
//--------------------------------------------------------------------------------------------------
public void Write(DxfWriter writer)
{
if (Version >= DxfVersion.AC1012)
{
_WriteHeader(writer);
_WriteClasses(writer);
_WriteTables(writer);
_WriteBlocks(writer);
}
_WriteEntities(writer);
if (Version >= DxfVersion.AC1012)
{
_WriteObjects(writer);
}
}
//--------------------------------------------------------------------------------------------------
void _WriteBlocks(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "BLOCKS");
writer.Write(0, "BLOCK");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, "0");
writer.WriteSubclass("AcDbBlockBegin");
writer.Write(2, "*Model_Space");
writer.Write(70, 0);
writer.Write(10, 0.0);
writer.Write(20, 0.0);
writer.Write(30, 0.0);
writer.Write(3, "*Model_Space");
writer.Write(1, "");
writer.Write(0, "ENDBLK");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, "0");
writer.WriteSubclass("AcDbBlockEnd");
writer.Write(0, "BLOCK");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, "0");
writer.WriteSubclass("AcDbBlockBegin");
writer.Write(2, "*Paper_Space");
writer.Write(70, 0);
writer.Write(10, 0.0);
writer.Write(20, 0.0);
writer.Write(30, 0.0);
writer.Write(3, "*Paper_Space");
writer.Write(1, "");
writer.Write(0, "ENDBLK");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, "0");
writer.WriteSubclass("AcDbBlockEnd");
writer.Write(0, "ENDSEC");
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
if (writer.Version < DxfVersion.AC1012)
{
return;
}
writer.Write(0, "SPLINE");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, LayerName);
writer.WriteSubclass("AcDbSpline");
writer.Write(210, 0.0); // Plane normal vector
writer.Write(220, 0.0);
writer.Write(230, 1.0);
writer.Write(70, (int)Flags.Added(SplineFlags.IsPlanar));
writer.Write(71, Degree);
writer.Write(72, Knots.Length);
writer.Write(73, ControlPoints.Length);
writer.Write(74, 0); // Number of fit points
foreach (var knot in Knots)
{
writer.Write(40, knot);
}
foreach (var point in ControlPoints)
{
writer.Write(10, point.X);
writer.Write(20, point.Y);
writer.Write(30, 0.0);
}
bool saveWeights = Weights?.Any(w => w.IsEqual(1.0, 0.0001)) ?? false;
if (saveWeights)
{
foreach (var weight in Weights)
{
writer.Write(41, weight);
}
}
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
// LWPOLYLINE supported by AC1012 or later
if (writer.Version >= DxfVersion.AC1012)
{
writer.Write(0, "LWPOLYLINE");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, LayerName);
writer.WriteSubclass("AcDbPolyline");
writer.Write(90, Points.Length);
writer.Write(70, IsClosed ? 1 : 0);
foreach (var point in Points)
{
writer.Write(10, point.X);
writer.Write(20, point.Y);
writer.Write(30, 0.0);
}
}
else
{
// Version only for AC1009
writer.Write(0, "POLYLINE");
writer.WriteHandle();
writer.Write(8, LayerName);
writer.Write(66, 1);
writer.Write(10, 0.0);
writer.Write(20, 0.0);
writer.Write(30, 0.0);
writer.Write(70, IsClosed ? 1 : 0);
foreach (var point in Points)
{
writer.Write(0, "VERTEX");
writer.WriteHandle();
writer.Write(8, LayerName);
writer.Write(10, point.X);
writer.Write(20, point.Y);
writer.Write(30, 0.0);
}
writer.Write(0, "SEQEND");
}
}
//--------------------------------------------------------------------------------------------------
void _WriteObjects(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "OBJECTS");
writer.Write(0, "DICTIONARY");
int lastHandle = writer.WriteHandle();
writer.WriteSubclass("AcDbDictionary");
writer.Write(281, 1);
writer.Write(3, "ACAD_GROUP");
writer.Write(350, (lastHandle + 1).ToString("X"));
writer.Write(0, "DICTIONARY");
writer.WriteHandle();
writer.WriteSubclass("AcDbDictionary");
writer.Write(281, 1);
writer.Write(0, "ENDSEC");
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
writer.Write(0, IsArc ? "ARC" : "CIRCLE");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, LayerName);
writer.WriteSubclass("AcDbCircle");
writer.Write(10, CenterPoint.X);
writer.Write(20, CenterPoint.Y);
writer.Write(30, 0.0);
writer.Write(40, Radius);
if (IsArc)
{
writer.WriteSubclass("AcDbArc");
writer.Write(50, StartAngle);
writer.Write(51, EndAngle);
}
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
writer.Write(0, "POLYLINE");
writer.WriteHandle();
writer.Write(8, LayerName);
writer.Write(66, 1);
writer.Write(10, 0.0);
writer.Write(20, 0.0);
writer.Write(30, 0.0);
writer.Write(70, IsClosed ? 1 : 0);
foreach (var point in Points)
{
writer.Write(0, "VERTEX");
writer.WriteHandle();
writer.Write(8, LayerName);
writer.Write(10, point.X);
writer.Write(20, point.Y);
writer.Write(30, 0.0);
}
writer.Write(0, "SEQEND");
}
//--------------------------------------------------------------------------------------------------
internal override void Write(DxfWriter writer)
{
if (writer.Version < DxfVersion.AC1012)
{
return;
}
writer.Write(0, "ELLIPSE");
writer.WriteHandle();
writer.WriteSubclass("AcDbEntity");
writer.Write(8, LayerName);
writer.WriteSubclass("AcDbEllipse");
writer.Write(10, CenterPoint.X);
writer.Write(20, CenterPoint.Y);
writer.Write(30, 0.0);
writer.Write(11, MajorAxisPointOffset.X);
writer.Write(21, MajorAxisPointOffset.Y);
writer.Write(31, 0.0);
writer.Write(40, Ratio);
writer.Write(41, StartParameter);
writer.Write(42, EndParameter);
}
//--------------------------------------------------------------------------------------------------
void _WriteTables(DxfWriter writer)
{
writer.Write(0, "SECTION");
writer.Write(2, "TABLES");
// VPORT
writer.Write(0, "TABLE");
{
writer.Write(2, "VPORT");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 0);
}
writer.Write(0, "ENDTAB");
// LTYPE
writer.Write(0, "TABLE");
{
writer.Write(2, "LTYPE");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, Linetypes.Count);
{
Linetypes.ForEach(linetype => linetype.Write(writer));
}
}
writer.Write(0, "ENDTAB");
// LAYER
writer.Write(0, "TABLE");
{
writer.Write(2, "LAYER");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, Layers.Count);
Layers.ForEach(layer => layer.Write(writer));
}
writer.Write(0, "ENDTAB");
// STYLE
writer.Write(0, "TABLE");
{
writer.Write(2, "STYLE");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 1);
{
writer.Write(0, "STYLE");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTableRecord");
writer.WriteSubclass("AcDbTextStyleTableRecord");
writer.Write(2, "STANDARD");
writer.Write(70, 0);
writer.Write(40, 0.0);
writer.Write(41, 1.0);
writer.Write(50, 0.0);
writer.Write(71, 0);
writer.Write(42, 2.5);
writer.Write(3, "txt");
writer.Write(4, "");
}
}
writer.Write(0, "ENDTAB");
// VIEW
writer.Write(0, "TABLE");
{
writer.Write(2, "VIEW");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 0);
}
writer.Write(0, "ENDTAB");
// UCS
writer.Write(0, "TABLE");
{
writer.Write(2, "UCS");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 0);
}
writer.Write(0, "ENDTAB");
// APPID
writer.Write(0, "TABLE");
{
writer.Write(2, "APPID");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 1);
{
writer.Write(0, "APPID");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTableRecord");
writer.WriteSubclass("AcDbRegAppTableRecord");
writer.Write(2, "ACAD");
writer.Write(70, 0);
}
}
writer.Write(0, "ENDTAB");
// DIMSTYLE
writer.Write(0, "TABLE");
{
writer.Write(2, "DIMSTYLE");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 1);
if (Version >= DxfVersion.AC1015)
{
writer.WriteSubclass("AcDbDimStyleTable");
}
{
writer.Write(0, "DIMSTYLE");
writer.WriteHandle(105);
writer.WriteSubclass("AcDbSymbolTableRecord");
writer.WriteSubclass("AcDbDimStyleTableRecord");
writer.Write(2, "STANDARD");
writer.Write(70, 0);
}
}
writer.Write(0, "ENDTAB");
// BLOCK_RECORD
writer.Write(0, "TABLE");
{
writer.Write(2, "BLOCK_RECORD");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTable");
writer.Write(70, 2);
{
writer.Write(0, "BLOCK_RECORD");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTableRecord");
writer.WriteSubclass("AcDbBlockTableRecord");
writer.Write(2, "*MODEL_SPACE");
writer.Write(0, "BLOCK_RECORD");
writer.WriteHandle();
writer.WriteSubclass("AcDbSymbolTableRecord");
writer.WriteSubclass("AcDbBlockTableRecord");
writer.Write(2, "*PAPER_SPACE");
}
}
writer.Write(0, "ENDTAB");
writer.Write(0, "ENDSEC");
}
internal abstract void Write(DxfWriter writer);
