Polyline ReadPolyline(List <netDxf.Entities.LwPolylineVertex> vertices, bool isClosed, double x, double y)
{
Polyline poly = new Polyline();
for (int i = 0; i < vertices.Count; i++)
{
netDxf.Entities.LwPolylineVertex vertex = vertices[i];
var point = new CADPoint(vertex.Position.X + x, vertex.Position.Y + y);
poly.AddVertexAt(i, point);
}
if (isClosed)
{
poly.closed = true;
}
return(poly);
}
/// <summary>
/// build 2d dxf polyline.
/// note: use RepeatFirstAtEnd extension to build a closed polyline
/// </summary>
public static netDxf.Entities.LwPolyline ToLwPolyline(this IEnumerable <Geometry> _geom, double tolLen, bool closed = true)
{
var geom = _geom.ToList();
var N = Vector3D.ZAxis;
var cs = new CoordinateSystem3D(Vector3D.Zero, N, CoordinateSystem3DAutoEnum.AAA);
var pvtx = new List <netDxf.Entities.LwPolylineVertex>();
Vector3D lastPt = null;
for (int i = 0; i < geom.Count; ++i)
{
Vector3D from = null;
Vector3D to = null;
switch (geom[i].Type)
{
case GeometryType.Vector3D:
{
to = geom[i] as Vector3D;
var lwpv = new netDxf.Entities.LwPolylineVertex(to.ToVector2());
pvtx.Add(lwpv);
lastPt = to;
}
break;
case GeometryType.Line3D:
{
var seg = geom[i] as Line3D;
from = seg.From;
to = seg.To;
if (lastPt == null || lastPt.EqualsTol(tolLen, from))
{
var lwpv = new netDxf.Entities.LwPolylineVertex(from.ToUCS(cs).ToVector2());
pvtx.Add(lwpv);
lastPt = to;
}
else
{
var lwpv = new netDxf.Entities.LwPolylineVertex(to.ToUCS(cs).ToVector2());
pvtx.Add(lwpv);
lastPt = from;
}
}
break;
case GeometryType.Arc3D:
{
var arc = geom[i] as Arc3D;
from = arc.From;
to = arc.To;
var bulge = arc.Bulge(tolLen, arc.From, arc.To, N);
if (lastPt == null)
{
if (i < geom.Count - 1)
{
if (geom[i + 1].GeomFrom.EqualsTol(tolLen, to))
{
var lwpv = new netDxf.Entities.LwPolylineVertex(from.ToUCS(cs).ToVector2())
{
Bulge = bulge
};
pvtx.Add(lwpv);
lastPt = to;
}
else
{
var lwpv = new netDxf.Entities.LwPolylineVertex(to.ToUCS(cs).ToVector2())
{
Bulge = -bulge
};
pvtx.Add(lwpv);
lastPt = from;
}
}
else
{
var lwpv = new netDxf.Entities.LwPolylineVertex(from.ToUCS(cs).ToVector2())
{
Bulge = bulge
};
pvtx.Add(lwpv);
lastPt = to;
}
}
else
{
if (lastPt.EqualsTol(tolLen, from))
{
var lwpv = new netDxf.Entities.LwPolylineVertex(from.ToUCS(cs).ToVector2())
{
Bulge = bulge
};
pvtx.Add(lwpv);
lastPt = to;
}
else
{
var lwpv = new netDxf.Entities.LwPolylineVertex(to.ToUCS(cs).ToVector2())
{
Bulge = -bulge
};
pvtx.Add(lwpv);
lastPt = from;
}
}
}
break;
}
}
if (!closed)
{
var lwpv = new netDxf.Entities.LwPolylineVertex(lastPt.ToUCS(cs).ToVector2());
pvtx.Add(lwpv);
}
var lwpoly = new netDxf.Entities.LwPolyline(pvtx, isClosed: closed);
lwpoly.Normal = N.Normalized();
return(lwpoly);
}
//extract mark vectors from DXF
public static void Extract_Vectors(string filename, string layer_name, float mark_speed)
{
List<MarkVector> list_of_vectors = new List<MarkVector>();
DxfDocument dxf = LoadDXF(filename);
if (dxf==null)
{
MessageBox.Show("netDXF extraction from DXF failed, trying line by line.");
dxf = LineByLineLoader(filename);
//need a text only loader for this. Python or not?
}
if (dxf==null)
{
MessageBox.Show("Line by line processing failed");
list_of_vectors = null;
//return list_of_vectors;
}
int number = 0;
netDxf.Vector2 previous_point = new netDxf.Vector2(0.0d, 0.0d);
netDxf.Entities.LwPolylineVertex avertex = new netDxf.Entities.LwPolylineVertex();
netDxf.Entities.PolylineVertex bvertex = new netDxf.Entities.PolylineVertex();
//convert LWPolylines to Mark Vectors
foreach(netDxf.Entities.LwPolyline apolyline in dxf.LwPolylines)
{
if(apolyline.Layer.Name ==layer_name || layer_name =="All")
{
for(int i=0; i<apolyline.Vertexes.Count; i++)
{
avertex = apolyline.Vertexes[i];
if(i==0)
{
previous_point.X=avertex.Location.X;
previous_point.Y=avertex.Location.Y;
}
if (i!=0)
{
MarkVector aMarkVector = new MarkVector((float)previous_point.X, (float)previous_point.Y, (float)avertex.Location.X, (float)avertex.Location.Y);
list_of_vectors.Add(aMarkVector);
number++;
previous_point.X=avertex.Location.X;
previous_point.Y=avertex.Location.Y;
}
}
if(apolyline.IsClosed==true)
{
MarkVector aMarkVector = new MarkVector((float)previous_point.X, (float)previous_point.Y, (float)apolyline.Vertexes[0].Location.X, (float)apolyline.Vertexes[0].Location.X);
list_of_vectors.Add(aMarkVector);
}
}
}
//convert polylines to Mark Vectors
foreach(netDxf.Entities.Polyline apolyline in dxf.Polylines)
{
for(int i=0; i<apolyline.Vertexes.Count; i++)
{
bvertex = apolyline.Vertexes[i];
if(i==0)
{
previous_point.X=bvertex.Location.X;
previous_point.Y=bvertex.Location.Y;
}
if (i!=0)
{
MarkVector aMarkVector = new MarkVector((float)previous_point.X, (float)previous_point.Y, (float)bvertex.Location.X, (float)bvertex.Location.Y);
list_of_vectors.Add(aMarkVector);
number++;
previous_point.X=avertex.Location.X;
previous_point.Y=avertex.Location.Y;
}
}
if(apolyline.IsClosed==true)
{
MarkVector aMarkVector = new MarkVector((float)previous_point.X, (float)previous_point.Y, (float)apolyline.Vertexes[0].Location.X, (float)apolyline.Vertexes[0].Location.X);
list_of_vectors.Add(aMarkVector);
}
}
//convert Lines to Mark Vectors
foreach(netDxf.Entities.Line aline in dxf.Lines)
{
if(aline.Layer.Name ==layer_name || layer_name =="All")
{
number++;
MarkVector aMarkVector = new MarkVector((float)aline.StartPoint.X, (float)aline.StartPoint.Y, (float)aline.EndPoint.X, (float)aline.EndPoint.Y);
list_of_vectors.Add(aMarkVector);
}
}
//convert arcs
foreach(netDxf.Entities.Arc an_arc in dxf.Arcs)
{
if(an_arc.Layer.Name ==layer_name || layer_name =="All")
{
number++;
//////TO DO/////////////
}
}
//convert circles
foreach(netDxf.Entities.Circle aCircle in dxf.Circles)
{
if(aCircle.Layer.Name ==layer_name || layer_name =="All")
{
number++;
//////TO DO/////////////
}
}
//MessageBox.Show(number.ToString());
//
//return list_of_vectors;
vector_list = list_of_vectors;
}
//Method to parse DXF line by line when LoadDXF fails
public static DxfDocument LineByLineLoader(string filename)
{
vector_list.Clear();
DxfDocument dxfdata = new DxfDocument();
List<string> list_of_strings = new List<string>();
//reset logic function
reset_logic();
entity_count =0;
double intermediate =0.0d; //used for nullable exchange
int int_intermediate =0;
bool in_block = false;
bool in_entities =false;
int LineCount =0;
string coder_string ="";
string a_string ="";
string layer_string ="";
Vector2 start_point = new Vector2(0,0);
Vector2 end_point = new Vector2(0,0);
try
{
string line = null;
bool found_file_end =false;
System.IO.TextReader readFile = new StreamReader(filename);
while (found_file_end==false)
{
line = readFile.ReadLine();
if (line != null)
{
list_of_strings.Add(line);
}
else
{
found_file_end=true;
}
}
readFile.Close();
readFile = null;
}
catch(Exception e)
{
error_string=e.ToString();
return dxfdata;
}
for(int i=0;i<list_of_strings.Count; i+=2) //read strings in pairs - first is code - second is value
{
LineCount = LineCount+1;
coder_string = list_of_strings[i].Trim();
try
{
a_string = list_of_strings[i+1].Trim();
}
catch
{
a_string="";
}
//check location in structure - only read from entities section
if (coder_string =="0" && a_string=="BLOCK")
{
in_block=true;
}
if(coder_string =="2" && a_string=="ENTITIES")
{
in_entities=true;
}
if(coder_string =="0" && a_string=="ENDBLK")
{
in_block=false;
}
if(coder_string =="0" && a_string=="ENDSEC")
{
in_entities=false;
}
//read in layer info
if(coder_string=="8" && in_block==false && in_entities==true && (ReadingLine==true || ReadingPolyline == true ||ReadingArc==true || ReadingCircle == true))
{
layer_string = a_string;
FoundNewLayer=true;
//could populate a layer list here if needed
}
//read data
if(coder_string=="10")
{
double.TryParse(a_string, out intermediate);
X1=(double?)intermediate;
}
if (coder_string=="11")
{
double.TryParse(a_string, out intermediate);
X2=(double?)intermediate;
}
if(coder_string=="20")
{
double.TryParse(a_string, out intermediate);
Y1=(double?)intermediate;
}
if(coder_string=="21")
{
double.TryParse(a_string, out intermediate);
Y2=(double?)intermediate;
}
if(coder_string=="40")
{
double.TryParse(a_string, out intermediate);
radius=(double?)intermediate;
}
if(coder_string=="50")
{
double.TryParse(a_string, out intermediate);
start_angle=(double?)intermediate;
}
if(coder_string=="51")
{
double.TryParse(a_string, out intermediate);
end_angle=(double?)intermediate;
}
if(coder_string=="70")
{
if(ReadingPolyline==true)
{
if(a_string=="1")
{
polyline_closed=true;
}
else
{
polyline_closed=false;
}
}
}
if(coder_string=="90")
{
if(ReadingPolyline==true)
{
int.TryParse(a_string, out int_intermediate);
PointCount = (int?)int_intermediate;
}
}
//flag start of a line
if(coder_string =="0" && a_string=="LINE" && in_block==false && in_entities==true)
{
if(ReadingLine==false)
{
reset_logic();
ReadingLine = true;
}
else
{
reset_logic();
}
}
//add line if data complete
if(ReadingLine==true && X1!=null && Y1 !=null && X2 !=null && Y2 != null)
{
start_point = new Vector2((double)X1,(double)Y1);
end_point = new Vector2((double)X2,(double)Y2);
netDxf.Entities.Line aLine = new netDxf.Entities.Line(start_point,end_point);
aLine.Layer = new netDxf.Tables.Layer(layer_string);
dxfdata.AddEntity(aLine);
reset_logic();
entity_count++;
}
//flag start of a LWPOLYLINE
if(coder_string =="0" && a_string=="LWPOLYLINE" && in_block==false && in_entities==true)
{
if(ReadingPolyline == false)
{
reset_logic();
ReadingPolyline = true;
}
else
{
reset_logic();
}
}
//add point to polyline
if(ReadingPolyline==true && X1 !=null && Y1!=null)
{
netDxf.Entities.LwPolylineVertex aVertex = new netDxf.Entities.LwPolylineVertex(new Vector2((double)X1,(double)Y1),0.0d);
points.Add(aVertex);
X1 = null;
Y1 = null;
}
//add polyline if have enough points
if(ReadingPolyline==true && points.Count==PointCount && PointCount !=null)
{
netDxf.Entities.LwPolyline aPolyline = new netDxf.Entities.LwPolyline(points,polyline_closed);
aPolyline.Layer= new netDxf.Tables.Layer(layer_string);
dxfdata.AddEntity(aPolyline);
reset_logic();
entity_count++;
}
//flag star of a ARC
if(coder_string =="0" && a_string=="ARC" && in_block == false)
{
if(ReadingArc==false)
{
reset_logic();
ReadingArc = true;
}
else
{
reset_logic();
}
}
//add arc if data complete
if(ReadingArc==true && X1 != null && Y1 !=null && radius !=null && start_angle != null && end_angle !=null)
{
Vector2 center = new Vector2((double)X1,(double)Y1);
netDxf.Entities.Arc aArc = new netDxf.Entities.Arc(center,(double)radius,(double)start_angle,(double)end_angle);
aArc.Layer= new netDxf.Tables.Layer(layer_string);
dxfdata.AddEntity(aArc);
reset_logic();
entity_count++;
}
//flag star of a CIRCLE
if (coder_string =="0" && a_string=="CIRCLE" && in_block ==false)
{
if (ReadingArc==false)
{
reset_logic();
ReadingCircle =true;
}
else
{
reset_logic();
}
}
//add circle if data complete
if(ReadingCircle==true && X1 !=null && Y1 !=null && radius != null)
{
Vector2 center = new Vector2((double)X1,(double)Y1);
netDxf.Entities.Circle aCircle = new netDxf.Entities.Circle(center,(double)radius);
aCircle.Layer= new netDxf.Tables.Layer(layer_string);
dxfdata.AddEntity(aCircle);
reset_logic();
entity_count++;
}
}
return dxfdata;
}
