private static Layer GetOrCreateLayer(ref ReadOnlyTree <string, Layer> layers, string layerName)
{
Layer layer = null;
// entities without a layer go to '0'
layerName = layerName ?? "0";
if (layers.KeyExists(layerName))
{
layer = layers.GetValue(layerName);
}
else
{
// add the layer if previously undefined
layer = new Layer(layerName);
layers = layers.Insert(layer.Name, layer);
}
return(layer);
}
public bool ReadDrawing(string fileName, Stream fileStream, out Drawing drawing, out ViewPort viewPort)
{
ReadOnlyTree <string, Layer> layers = null;
using (var reader = new StreamReader(fileStream, encoding: Encoding.UTF8, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true))
{
var json = reader.ReadToEnd();
var jsonDrawing = JsonConvert.DeserializeObject <JsonDrawing>(json, Settings);
var layerList = new List <Layer>();
foreach (var jsonLayer in jsonDrawing.Floorplan.Layers)
{
var layer = new Layer(jsonLayer.Name, color: CadColor.FromArgb(255, jsonLayer.R, jsonLayer.G, jsonLayer.B));
layerList.Add(layer);
}
layers = ReadOnlyTree <string, Layer> .FromEnumerable(layerList, l => l.Name);
void AddEntityToLayer(string layerName, Entity entity)
{
var layer = layers.GetValue(layerName);
layer = layer.Add(entity);
layers = layers.Insert(layerName, layer);
}
foreach (var block in jsonDrawing.Floorplan.Blocks)
{
switch (block.Name.ToUpperInvariant())
{
case "*MODEL_SPACE":
foreach (var jsonEntity in block.Entities)
{
switch (jsonEntity)
{
case JsonArc jsonArc:
var arc = new Arc(jsonArc.Center, jsonArc.Radius, jsonArc.StartAngle * MathHelper.RadiansToDegrees, jsonArc.EndAngle * MathHelper.RadiansToDegrees, Vector.ZAxis);
AddEntityToLayer(jsonEntity.Layer, arc);
break;
case JsonLine jsonLine:
for (int i = 0; i < jsonLine.Points.Count - 1; i++)
{
AddEntityToLayer(jsonEntity.Layer, new Line(jsonLine.Points[i], jsonLine.Points[i + 1]));
}
if (jsonLine.Points.Count > 2)
{
AddEntityToLayer(jsonEntity.Layer, new Line(jsonLine.Points.Last(), jsonLine.Points.First()));
}
break;
default:
break;
}
}
break;
// TODO: handle other blocks?
}
}
}
drawing = new Drawing().Update(layers: layers);
viewPort = null; // auto-generate later
return(true);
}