private (string LayerName, MarkGeometryArc Arc) ParseArc(AdvancedLineStreamReader readerIn)
{
var(success, layerName) = ReadLayerName(readerIn, "AcDbCircle");
if (success)
{
var result1 = readerIn.FindConsecutiveLines(
"100",
"AcDbCircle"
);
if (!result1.Success)
{
return(null, null);
}
}
MarkGeometryPoint centrePoint = ReadPointFast(readerIn);
// read radius 40
readerIn.ReadLine();
double radius = double.Parse(readerIn.ReadLine());
var result2 = readerIn.FindConsecutiveLines(
"100",
"AcDbArc"
);
if (!result2.Success)
{
return(null, null);
}
// read angle 50
readerIn.ReadLine();
var startAngle = double.Parse(readerIn.ReadLine());
// read angle 60
readerIn.ReadLine();
var endAngle = double.Parse(readerIn.ReadLine());
var arc = new MarkGeometryArc(
centrePoint,
radius, // convert angle to radians
GeometricArithmeticModule.ToRadians(startAngle),
GeometricArithmeticModule.ToRadians(endAngle)
);
return(layerName, arc);
}
private static (string Layer, IMarkGeometry Geometry) TryParseArc(StreamReader readerIn)
{
string layerName = null;
IMarkGeometry geometry = null;
double radius = 0;
var centre = new MarkGeometryPoint()
{
LayerName = layerName
};
while (true)
{
var(found, line) = SkipUntil(readerIn, MatchLayerOrArc);
if (!found)
{
break;
}
switch (MatchLayerOrArc.Match(line).Value.Trim())
{
case "8":
layerName = readerIn.ReadLine();
break;
case "AcDbCircle":
centre = TryParsePoint(readerIn);
if (centre == null)
{
throw new Exception("Failed to parse centre point of arc");
}
if (!SkipUntil(readerIn, MatchGroupCodeForRadius).Found)
{
throw new Exception("Failed to parse arc radius");
}
radius = double.Parse(readerIn.ReadLine());
break;
case "AcDbArc":
if (!SkipUntil(readerIn, MatchGroupCodeForStartAngle).Found)
{
throw new Exception("Failed to parse arc start's angle");
}
double startAngle = double.Parse(readerIn.ReadLine());
if (!SkipUntil(readerIn, MatchGroupCodeForEndAngle).Found)
{
throw new Exception("Failed to parse arc end's angle");
}
double endAngle = double.Parse(readerIn.ReadLine());
geometry = new MarkGeometryArc(centre, radius, startAngle, endAngle)
{
LayerName = layerName
};
return(layerName, geometry);
default:
throw new Exception($"Matched circle attribute is not supported: `{line}`");
}
}
return(layerName, geometry);
}