/// <summary>
/// Reads the TEXT data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Text object with layer, value (text) and position data</returns>
private Text ReadText(ref CodePair code)
{
Text returnval = new Text(Vector2d.Zero, "", "0");
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 1:
returnval.Value = code.Value;
break;
case 8:
returnval.Layer = code.Value;
break;
case 10:
returnval.Position.X = double.Parse(code.Value);
break;
case 20:
returnval.Position.Y = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the VERTEX data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Vertex object with layer, position and bulge data</returns>
private Vertex ReadVertex(ref CodePair code)
{
Vertex returnval = new Vertex(0, 0, 0, "0");
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 10:
returnval.Position.X = double.Parse(code.Value);
break;
case 20:
returnval.Position.Y = double.Parse(code.Value);
break;
case 42:
returnval.Bulge = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the CIRCLE data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Circle object with layer, center point and radius data</returns>
private Circle ReadCircle(ref CodePair code)
{
Circle returnval = new Circle(Vector2d.Zero, 0, "0");
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 10:
returnval.Center.X = double.Parse(code.Value);
break;
case 20:
returnval.Center.Y = double.Parse(code.Value);
break;
case 40:
returnval.Radius = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the LINE data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Line object with layer and two point data</returns>
private Line ReadLine(ref CodePair code)
{
Line returnval = new Line(Vector2d.Zero, Vector2d.Zero, "0");
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 10:
returnval.P1.X = double.Parse(code.Value);
break;
case 20:
returnval.P1.Y = double.Parse(code.Value);
break;
case 11:
returnval.P2.X = double.Parse(code.Value);
break;
case 21:
returnval.P2.Y = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the SECTION name from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A string containing the section name</returns>
private string ReadSection(ref CodePair code)
{
string returnval = "";
code = this.ReadPair();
while (code.Code != 0)
{
if (code.Code == 2)
{
returnval = code.Value;
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the LWPOLYLINE data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Polyline object with layer, closed flag and vertex list data</returns>
private Polyline ReadLwPolyline(ref CodePair code)
{
Polyline returnval = new Polyline(new List <Vertex>(), "0", false);
Vertex vtx = new Vertex(Vector2d.Zero);
int flags = 0;
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 70:
flags = int.Parse(code.Value);
break;
case 10:
vtx = new Vertex(Vector2d.Zero);
vtx.Position.X = double.Parse(code.Value);
break;
case 20:
vtx.Position.Y = double.Parse(code.Value);
returnval.Vertexes.Add(vtx);
break;
case 42:
vtx.Bulge = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
if ((flags & 1) == 1)
{
returnval.Closed = true;
}
return(returnval);
}
/// <summary>
/// Reads the POLYLINE data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Polyline object with layer, closed flag and vertex list data</returns>
private Polyline ReadPolyline(ref CodePair code)
{
Polyline returnval = new Polyline(new List <Vertex>(), "0", false);
int flags = 0;
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 70:
flags = int.Parse(code.Value);
break;
}
code = this.ReadPair();
}
while (code.Value != "SEQEND")
{
if (code.Value == "VERTEX")
{
Vertex vtx = ReadVertex(ref code);
returnval.Vertexes.Add(vtx);
}
else
{
code = this.ReadPair();
}
}
if ((flags & 1) == 1)
{
returnval.Closed = true;
}
return(returnval);
}
/// <summary>
/// Reads the LAYER data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>A Layer object with name and AciColor index</returns>
private Layer ReadLayer(ref CodePair code)
{
Layer returnval = new Layer("0", 0);
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 2:
returnval.Name = code.Value;
break;
case 62:
returnval.ColorIndex = int.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Reads the ARC data from the DXF file
/// </summary>
/// <param name="code">A reference to the current CodePair read</param>
/// <returns>An Arc object with layer, center point, radius, start angle and end angle data</returns>
private Arc ReadArc(ref CodePair code)
{
Arc returnval = new Arc(Vector2d.Zero, 0, 0, 0, "0");
code = this.ReadPair();
while (code.Code != 0)
{
switch (code.Code)
{
case 8:
returnval.Layer = code.Value;
break;
case 10:
returnval.Center.X = double.Parse(code.Value);
break;
case 20:
returnval.Center.Y = double.Parse(code.Value);
break;
case 40:
returnval.Radius = double.Parse(code.Value);
break;
case 50:
returnval.StartAngle = double.Parse(code.Value);
break;
case 51:
returnval.EndAngle = double.Parse(code.Value);
break;
}
code = this.ReadPair();
}
return(returnval);
}
/// <summary>
/// Read and parse the DXF file
/// </summary>
public void Read()
{
bool entitysection = false;
CodePair code = this.ReadPair();
while ((code.Value != "EOF") && (!dxfReader.EndOfStream))
{
if (code.Code == 0)
{
//Have we reached the entities section yet?
if (!entitysection)
{
//No, so keep going until we find the ENTIIES section (and since we are here, let's try to read the layers)
switch (code.Value)
{
case "SECTION":
string sec = ReadSection(ref code);
if (sec == "ENTITIES")
{
entitysection = true;
}
break;
case "LAYER":
Layer layer = ReadLayer(ref code);
Layers.Add(layer);
break;
default:
code = this.ReadPair();
break;
}
}
else
{
//Yes, so let's read the entities
switch (code.Value)
{
case "LINE":
Line line = ReadLine(ref code);
Lines.Add(line);
break;
case "CIRCLE":
Circle circle = ReadCircle(ref code);
Circles.Add(circle);
break;
case "ARC":
Arc arc = ReadArc(ref code);
Arcs.Add(arc);
break;
case "POINT":
Point point = ReadPoint(ref code);
Points.Add(point);
break;
case "TEXT":
Text text = ReadText(ref code);
Texts.Add(text);
break;
case "POLYLINE":
Polyline polyline = ReadPolyline(ref code);
Polylines.Add(polyline);
break;
case "LWPOLYLINE":
Polyline lwpolyline = ReadLwPolyline(ref code);
Polylines.Add(lwpolyline);
break;
default:
code = this.ReadPair();
break;
}
}
}
else
{
code = this.ReadPair();
}
}
}