//--------------------------------------------------------------------------------------------------
void _ReadHeader(DxfReader reader)
{
while (reader.GroupCode > 0)
{
if (reader.GroupCode != 9)
{
reader.Skip();
continue;
}
var variableName = reader.ReadString()?.ToUpper();
if (variableName == null)
{
continue;
}
switch (variableName)
{
/* case "$MEASUREMENT":
* var measurement = reader.ReadInteger();
* break;*/
default:
reader.Skip();
break;
}
}
}
//--------------------------------------------------------------------------------------------------
public override bool Read(DxfReader reader)
{
var pointList = new List <Pnt2d>();
Pnt2d point = default;
bool skipNextVertex = false;
var readBits = new BitVector32(0);
// read POLYLINE
while (reader.GroupCode > 0)
{
switch (reader.GroupCode)
{
case 70:
int flags = reader.ReadInteger();
if (flags > 1)
{
Messages.Warning($"DxfReader: Entity POLYGON has flags set in line {reader.Line} which are not supported for import. The polygon will be imported using straight lines between vertices.");
}
break;
default:
reader.Skip();
break;
}
}
// read VERTEX
var type = reader.ReadString().ToUpper();
while (type.Equals("VERTEX"))
{
while (reader.GroupCode > 0)
{
switch (reader.GroupCode)
{
case 70:
int flags = reader.ReadInteger();
if (flags != 0)
{
skipNextVertex = true;
}
break;
case 10:
point.X = reader.ReadCoord();
readBits[0b01] = true;
//--------------------------------------------------------------------------------------------------
void _Read(DxfReader reader)
{
while (reader.GroupCode >= 0)
{
if (reader.GroupCode != 0)
{
reader.Skip();
continue;
}
var type = reader.ReadString()?.ToUpper();
if (type == null)
{
continue;
}
if (type.Equals("EOF"))
{
break;
}
if (type.Equals("SECTION") && reader.GroupCode == 2)
{
var name = reader.ReadString()?.ToUpper();
if (name == null)
{
continue;
}
if (name.Equals("HEADER"))
{
_ReadHeader(reader);
}
else if (name.Equals("ENTITIES"))
{
_ReadEntities(reader);
}
}
}
}
//--------------------------------------------------------------------------------------------------
void _ReadEntities(DxfReader reader)
{
while (reader.GroupCode >= 0)
{
if (reader.GroupCode != 0)
{
reader.Skip();
continue;
}
var type = reader.ReadString()?.ToUpper();
if (type == null)
{
continue;
}
DxfDomEntity entity = null;
switch (type)
{
case "ENDSEC":
return;
case "LINE":
entity = new DxfDomLine();
break;
case "CIRCLE":
case "ARC":
entity = new DxfDomCircle();
break;
case "ELLIPSE":
entity = new DxfDomEllipse();
break;
case "LWPOLYLINE":
entity = new DxfDomLwPolyline();
break;
case "POLYLINE":
entity = new DxfDomPolyline();
break;
case "SPLINE":
entity = new DxfDomSpline();
break;
}
if (entity == null)
{
continue;
}
if (entity.Read(reader))
{
Entities.Add(entity);
}
else
{
Messages.Error($"DxfReader: Incomplete entity description at line {reader.Line}.");
}
}
}