private static void WriteDxfFile()
{
DxfDocument dxf = new DxfDocument();
//arc
Arc arc = new Arc(new Vector3(10, 10, 0), 10, 45, 135);
arc.Layer = new Layer("arc");
arc.Layer.Color.Index = 1;
dxf.AddEntity(arc);
//xData sample
XData xdata = new XData(new ApplicationRegistry("netDxf"));
xdata.XDataRecord.Add(new XDataRecord(XDataCode.String, "extended data with netDxf"));
xdata.XDataRecord.Add(XDataRecord.OpenControlString);
xdata.XDataRecord.Add(new XDataRecord(XDataCode.WorldSpacePositionX, 0));
xdata.XDataRecord.Add(new XDataRecord(XDataCode.WorldSpacePositionY, 0));
xdata.XDataRecord.Add(new XDataRecord(XDataCode.WorldSpacePositionZ, 0));
xdata.XDataRecord.Add(XDataRecord.CloseControlString);
XData xdata2 = new XData(new ApplicationRegistry("other application"));
xdata2.XDataRecord.Add(new XDataRecord(XDataCode.String, "extended data with netDxf"));
xdata2.XDataRecord.Add(XDataRecord.OpenControlString);
xdata2.XDataRecord.Add(new XDataRecord(XDataCode.String, "string record"));
xdata2.XDataRecord.Add(new XDataRecord(XDataCode.Real, 15.5));
xdata2.XDataRecord.Add(new XDataRecord(XDataCode.Int32, 350));
xdata2.XDataRecord.Add(XDataRecord.CloseControlString);
//circle
Vector3 extrusion = new Vector3(1, 1, 1);
Vector3 centerWCS = new Vector3(1, 1, 1);
Vector3 centerOCS = MathHelper.Transform(centerWCS,
extrusion,
CoordinateSystem.World,
CoordinateSystem.Object);
Circle circle = new Circle(centerOCS, 5);
circle.Layer = new Layer("circle with spaces");
circle.Layer.Color=AciColor.Yellow;
circle.LineType = LineType.Dashed;
circle.Normal = extrusion;
circle.XData.Add(xdata);
circle.XData.Add(xdata2);
dxf.AddEntity(circle);
//points
Point point1 = new Point(new Vector3(-3, -3, 0));
point1.Layer = new Layer("point");
point1.Color = new AciColor(30);
Point point2 = new Point(new Vector3(1, 1, 1));
point2.Layer = point1.Layer;
point2.Layer.Color.Index = 9;
point2.Normal = new Vector3(1, 1, 1);
dxf.AddEntity(point1);
dxf.AddEntity(point2);
//3dface
Face3d face3D = new Face3d(new Vector3(-5, -5, 5),
new Vector3(5, -5, 5),
new Vector3(5, 5, 5),
new Vector3(-5, 5, 5));
face3D.Layer = new Layer("3dface");
face3D.Layer.Color.Index = 3;
dxf.AddEntity(face3D);
//polyline
LwPolylineVertex polyVertex;
List<LwPolylineVertex> polyVertexes = new List<LwPolylineVertex>();
polyVertex = new LwPolylineVertex(new Vector2(-50, -50));
polyVertex.StartWidth = 2;
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(50, -50));
polyVertex.StartWidth = 1;
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(50, 50));
polyVertex.Bulge = 1;
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(-50, 50));
polyVertexes.Add(polyVertex);
LwPolyline polyline2d = new LwPolyline(polyVertexes, true);
polyline2d.Layer = new Layer("polyline2d");
polyline2d.Layer.Color.Index = 5;
polyline2d.Normal = new Vector3(1, 1, 1);
polyline2d.Elevation = 100.0f;
dxf.AddEntity(polyline2d);
//lightweight polyline
LwPolylineVertex lwVertex;
List<LwPolylineVertex> lwVertexes = new List<LwPolylineVertex>();
lwVertex = new LwPolylineVertex(new Vector2(-25, -25));
lwVertex.StartWidth = 2;
lwVertexes.Add(lwVertex);
lwVertex = new LwPolylineVertex(new Vector2(25, -25));
lwVertex.StartWidth = 1;
lwVertexes.Add(lwVertex);
lwVertex = new LwPolylineVertex(new Vector2(25, 25));
lwVertex.Bulge = 1;
lwVertexes.Add(lwVertex);
lwVertex = new LwPolylineVertex(new Vector2(-25, 25));
lwVertexes.Add(lwVertex);
LwPolyline lwPolyline = new LwPolyline(lwVertexes, true);
lwPolyline.Layer = new Layer("lwpolyline");
lwPolyline.Layer.Color.Index = 5;
lwPolyline.Normal = new Vector3(1, 1, 1);
lwPolyline.Elevation = 100.0f;
dxf.AddEntity(lwPolyline);
// polyfaceMesh
List<PolyfaceMeshVertex> meshVertexes = new List<PolyfaceMeshVertex>
{
new PolyfaceMeshVertex(0, 0, 0),
new PolyfaceMeshVertex(10, 0, 0),
new PolyfaceMeshVertex(10, 10, 0),
new PolyfaceMeshVertex(5, 15, 0),
new PolyfaceMeshVertex(0, 10, 0)
};
List<PolyfaceMeshFace> faces = new List<PolyfaceMeshFace>
{
new PolyfaceMeshFace(new short[] {1, 2, -3}),
new PolyfaceMeshFace(new short[] {-1, 3, -4}),
new PolyfaceMeshFace(new short[] {-1, 4, 5})
};
PolyfaceMesh mesh = new PolyfaceMesh(meshVertexes, faces);
mesh.Layer = new Layer("polyfacemesh");
mesh.Layer.Color.Index = 104;
dxf.AddEntity(mesh);
//line
Line line = new Line(new Vector3(0, 0, 0), new Vector3(10, 10, 10));
line.Layer = new Layer("line");
line.Layer.Color.Index = 6;
dxf.AddEntity(line);
//3d polyline
PolylineVertex vertex;
List<PolylineVertex> vertexes = new List<PolylineVertex>();
vertex = new PolylineVertex(new Vector3(-50, -50, 0));
vertexes.Add(vertex);
vertex = new PolylineVertex(new Vector3(50, -50, 10));
vertexes.Add(vertex);
vertex = new PolylineVertex(new Vector3(50, 50, 25));
vertexes.Add(vertex);
vertex = new PolylineVertex(new Vector3(-50, 50, 50));
vertexes.Add(vertex);
Polyline polyline = new Polyline(vertexes, true);
polyline.Layer = new Layer("polyline3d");
polyline.Layer.Color.Index = 24;
dxf.AddEntity(polyline);
//block definition
Block block = new Block("TestBlock");
block.Entities.Add(new Line(new Vector3(-5, -5, 5), new Vector3(5, 5, 5)));
block.Entities.Add(new Line(new Vector3(5, -5, 5), new Vector3(-5, 5, 5)));
//insert
Insert insert = new Insert(block, new Vector3(5, 5, 5));
insert.Layer = new Layer("insert");
insert.Layer.Color.Index = 4;
dxf.AddEntity(insert);
//text
TextStyle style=new TextStyle("True type font","Arial.ttf");
Text text = new Text("Hello world!", Vector3.Zero, 10.0f,style);
text.Layer = new Layer("text");
text.Layer.Color.Index = 8;
text.Alignment = TextAlignment.TopRight;
dxf.AddEntity(text);
dxf.DrawingVariables.AcadVer = DxfVersion.AutoCad2010;
dxf.Save("AutoCad2010.dxf");
dxf.DrawingVariables.AcadVer = DxfVersion.AutoCad2007;
dxf.Save("AutoCad2007.dxf");
dxf.DrawingVariables.AcadVer = DxfVersion.AutoCad2004;
dxf.Save("AutoCad2004.dxf");
dxf.DrawingVariables.AcadVer = DxfVersion.AutoCad2000;
dxf.Save("AutoCad2000.dxf");
dxf = DxfDocument.Load("AutoCad2000.dxf");
dxf.Save("AutoCad2000 result.dxf");
}
private EntityObject ReadPolyline()
{
// the entity Polyline in dxf can actually hold three kinds of entities
// 3d polyline is the generic polyline
// polyface mesh
// polylines 2d is the old way of writing polylines the AutoCAD2000 and newer always use LwPolylines to define a 2d polyline
// this way of reading 2d polylines is here for compatibility reasons with older dxf versions.
PolylinetypeFlags flags = PolylinetypeFlags.OpenPolyline;
PolylineSmoothType smoothType = PolylineSmoothType.NoSmooth;
double elevation = 0.0;
double thickness = 0.0;
Vector3 normal = Vector3.UnitZ;
List<Vertex> vertexes = new List<Vertex>();
List<XData> xData = new List<XData>();
this.chunk.Next();
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 30:
elevation = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 39:
thickness = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 70:
flags = (PolylinetypeFlags) this.chunk.ReadShort();
this.chunk.Next();
break;
case 75:
smoothType = (PolylineSmoothType) this.chunk.ReadShort();
this.chunk.Next();
break;
case 71:
//this field might not exist for polyface meshes, we cannot depend on it
//numVertexes = int.Parse(code.Value); code = this.ReadCodePair();
this.chunk.Next();
break;
case 72:
//this field might not exist for polyface meshes, we cannot depend on it
this.chunk.Next();
break;
case 210:
normal.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 220:
normal.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 230:
normal.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 1001:
string appId = this.DecodeEncodedNonAsciiCharacters(this.chunk.ReadString());
XData data = this.ReadXDataRecord(this.GetApplicationRegistry(appId));
xData.Add(data);
break;
default:
if (this.chunk.Code >= 1000 && this.chunk.Code <= 1071)
throw new Exception("The extended data of an entity must start with the application registry code.");
this.chunk.Next();
break;
}
}
//begin to read the vertex list (although it is not recommended the vertex list might have 0 entries)
while (this.chunk.ReadString() != DxfObjectCode.EndSequence)
{
if (this.chunk.ReadString() == DxfObjectCode.Vertex)
{
Vertex vertex = this.ReadVertex();
vertexes.Add(vertex);
}
}
// read the end sequence object until a new element is found
this.chunk.Next();
string endSequenceHandle = null;
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 5:
endSequenceHandle = this.chunk.ReadHex();
this.chunk.Next();
break;
case 8:
// the polyline EndSequence layer should be the same as the polyline layer
this.chunk.Next();
break;
default:
this.chunk.Next();
break;
}
}
EntityObject pol;
bool isClosed = flags.HasFlag(PolylinetypeFlags.ClosedPolylineOrClosedPolygonMeshInM);
//to avoid possible error between the vertex type and the polyline type
//the polyline type will decide which information to use from the read vertex
if (flags.HasFlag(PolylinetypeFlags.Polyline3D))
{
List<PolylineVertex> polyline3dVertexes = new List<PolylineVertex>();
foreach (Vertex v in vertexes)
{
PolylineVertex vertex = new PolylineVertex
{
Flags = v.Flags,
Position = v.Position,
Handle = v.Handle,
};
polyline3dVertexes.Add(vertex);
}
pol = new Polyline(polyline3dVertexes, isClosed)
{
Flags = flags,
SmoothType = smoothType,
Normal = normal
};
((Polyline) pol).EndSequence.Handle = endSequenceHandle;
}
else if (flags.HasFlag(PolylinetypeFlags.PolyfaceMesh))
{
//the vertex list created contains vertex and face information
List<PolyfaceMeshVertex> polyfaceVertexes = new List<PolyfaceMeshVertex>();
List<PolyfaceMeshFace> polyfaceFaces = new List<PolyfaceMeshFace>();
foreach (Vertex v in vertexes)
{
if (v.Flags.HasFlag(VertexTypeFlags.PolyfaceMeshVertex | VertexTypeFlags.Polygon3dMesh))
{
PolyfaceMeshVertex vertex = new PolyfaceMeshVertex
{
Location = v.Position,
Handle = v.Handle,
};
polyfaceVertexes.Add(vertex);
}
else if (v.Flags.HasFlag(VertexTypeFlags.PolyfaceMeshVertex))
{
PolyfaceMeshFace vertex = new PolyfaceMeshFace(v.VertexIndexes)
{
Handle = v.Handle
};
polyfaceFaces.Add(vertex);
}
}
pol = new PolyfaceMesh(polyfaceVertexes, polyfaceFaces)
{
Normal = normal
};
((PolyfaceMesh) pol).EndSequence.Handle = endSequenceHandle;
}
else
{
List<LwPolylineVertex> polylineVertexes = new List<LwPolylineVertex>();
foreach (Vertex v in vertexes)
{
LwPolylineVertex vertex = new LwPolylineVertex
{
Position = new Vector2(v.Position.X, v.Position.Y),
StartWidth = v.StartWidth,
Bulge = v.Bulge,
EndWidth = v.EndWidth,
};
polylineVertexes.Add(vertex);
}
pol = new LwPolyline(polylineVertexes, isClosed)
{
Flags = flags,
Thickness = thickness,
Elevation = elevation,
Normal = normal,
};
}
pol.XData.AddRange(xData);
return pol;
}
private LwPolyline ReadLwPolyline()
{
double elevation = 0.0;
double thickness = 0.0;
PolylinetypeFlags flags = PolylinetypeFlags.OpenPolyline;
double constantWidth = -1.0;
List<LwPolylineVertex> polVertexes = new List<LwPolylineVertex>();
LwPolylineVertex v = null;
double vX = 0.0;
Vector3 normal = Vector3.UnitZ;
List<XData> xData = new List<XData>();
this.chunk.Next();
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 38:
elevation = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 39:
thickness = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 43:
// constant width (optional; default = 0). If present it will override any vertex width (codes 40 and/or 41)
constantWidth = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 70:
flags = (PolylinetypeFlags) this.chunk.ReadShort();
this.chunk.Next();
break;
case 90:
//numVertexes = int.Parse(code.Value);
this.chunk.Next();
break;
case 10:
vX = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 20:
double vY = this.chunk.ReadDouble();
v = new LwPolylineVertex(vX, vY);
polVertexes.Add(v);
this.chunk.Next();
break;
case 40:
double startWidth = this.chunk.ReadDouble();
if (v != null)
if (startWidth >= 0.0)
v.StartWidth = startWidth;
this.chunk.Next();
break;
case 41:
double endWidth = this.chunk.ReadDouble();
if (v != null)
if (endWidth >= 0.0)
v.EndWidth = endWidth;
this.chunk.Next();
break;
case 42:
if (v != null)
v.Bulge = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 210:
normal.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 220:
normal.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 230:
normal.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 1001:
string appId = this.DecodeEncodedNonAsciiCharacters(this.chunk.ReadString());
XData data = this.ReadXDataRecord(this.GetApplicationRegistry(appId));
xData.Add(data);
break;
default:
if (this.chunk.Code >= 1000 && this.chunk.Code <= 1071)
throw new Exception("The extended data of an entity must start with the application registry code.");
this.chunk.Next();
break;
}
}
LwPolyline entity = new LwPolyline
{
Elevation = elevation,
Thickness = thickness,
Flags = flags,
Normal = normal
};
entity.Vertexes.AddRange(polVertexes);
if (constantWidth >= 0.0)
entity.SetConstantWidth(constantWidth);
entity.XData.AddRange(xData);
return entity;
}
private static void ExplodeTest()
{
DxfDocument dxf = new DxfDocument();
//polyline
LwPolylineVertex polyVertex;
List<LwPolylineVertex> polyVertexes = new List<LwPolylineVertex>();
polyVertex = new LwPolylineVertex(new Vector2(-50, -23.5));
polyVertex.Bulge = 1.33;
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(34.8, -42.7));
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(65.3, 54.7));
polyVertex.Bulge = -0.47;
polyVertexes.Add(polyVertex);
polyVertex = new LwPolylineVertex(new Vector2(-48.2, 42.5));
polyVertexes.Add(polyVertex);
LwPolyline polyline2d = new LwPolyline(polyVertexes);
polyline2d.Layer = new Layer("polyline2d");
polyline2d.Layer.Color.Index = 5;
polyline2d.Normal = new Vector3(1, 1, 1);
polyline2d.Elevation = 100.0f;
dxf.AddEntity(polyline2d);
dxf.AddEntity(polyline2d.Explode());
dxf.Save("explode.dxf");
}
private static void LineWidth()
{
// the line thickness works as expected, according to the AutoCAD way of doing things
Line thickLine = new Line(new Vector3(0,10,0), new Vector3(10,20,0));
// when you assign a thickness to a line, the result is like a wall, it is like a 3d face whose vertexes are defined by the
// start and end points of the line and the thickness along the normal of the line.
thickLine.Thickness = 5;
// maybe what you are trying to do is create a line with a width (something that we can read it as a line with thickness), the only way to do this is to create a polyline
// the kind of result you will get if you give a width to a 2d polyline
// you can only give a width to a vertex of a Polyline or a LightweigthPolyline
// I am planning to drop support to AutoCAD 12 dxf files, so to define a bidimensional polyline the only way will be to use lightweight polyline
// (the Polyline class and the LightWeightPolyline are basically the same).
LwPolyline widthLine = new LwPolyline();
LwPolylineVertex startVertex = new LwPolylineVertex(new Vector2(0, 0));
LwPolylineVertex endVertex = new LwPolylineVertex(new Vector2(10, 10));
widthLine.Vertexes.AddRange(new[] { startVertex, endVertex });
// the easy way to give a constant width to a polyline, but you can also give a polyline width by vertex
// there is a mistake on my part, following the AutoCAD documentation I should have called the PolylineVertex.StartThickness and PolylineVertex.EndThickness as
// PolylineVertex.StartWidth and PolylineVertex.EndWidth
// SetConstantWidth is a sort cut that will assign the given value to every start width and end width of every vertex of the polyline
widthLine.SetConstantWidth(0.5);
DxfDocument dxf = new DxfDocument();
// add the entities to the document (both of them to see the difference)
dxf.AddEntity(thickLine);
dxf.AddEntity(widthLine);
dxf.Save("line width.dxf");
}
private static void TestOCStoWCS()
{
// vertexes of the light weight polyline, they are defined in OCS (Object Coordinate System)
LwPolylineVertex v1 = new LwPolylineVertex(1, -5);
LwPolylineVertex v2 = new LwPolylineVertex(-3, 2);
LwPolylineVertex v3 = new LwPolylineVertex(8, 15);
LwPolyline lwp = new LwPolyline(new List<LwPolylineVertex> {v1, v2, v3});
// the normal will define the plane where the lwpolyline is defined
lwp.Normal = new Vector3(1, 1, 0);
// the entity elevation defines the z vector of the vertexes along the entity normal
lwp.Elevation = 2.5;
DxfDocument dxf = new DxfDocument();
dxf.AddEntity(lwp);
dxf.Save("OCStoWCS.dxf");
// if you want to convert the vertexes of the polyline to WCS (World Coordinate System), you can
Vector3 v1OCS = new Vector3(v1.Position.X, v1.Position.Y, lwp.Elevation);
Vector3 v2OCS = new Vector3(v2.Position.X, v2.Position.Y, lwp.Elevation);
Vector3 v3OCS = new Vector3(v3.Position.X, v3.Position.Y, lwp.Elevation);
IList<Vector3> vertexesWCS = MathHelper.Transform(new List<Vector3> { v1OCS, v2OCS, v3OCS }, lwp.Normal, CoordinateSystem.Object, CoordinateSystem.World);
}
