private void WriteTrace(Trace trace)
{
this.chunk.Write(100, SubclassMarker.Trace);
// the vertexes are stored in OCS
this.chunk.Write(10, trace.FirstVertex.X);
this.chunk.Write(20, trace.FirstVertex.Y);
this.chunk.Write(30, trace.Elevation);
this.chunk.Write(11, trace.SecondVertex.X);
this.chunk.Write(21, trace.SecondVertex.Y);
this.chunk.Write(31, trace.Elevation);
this.chunk.Write(12, trace.ThirdVertex.X);
this.chunk.Write(22, trace.ThirdVertex.Y);
this.chunk.Write(32, trace.Elevation);
this.chunk.Write(13, trace.FourthVertex.X);
this.chunk.Write(23, trace.FourthVertex.Y);
this.chunk.Write(33, trace.Elevation);
this.chunk.Write(39, trace.Thickness);
this.chunk.Write(210, trace.Normal.X);
this.chunk.Write(220, trace.Normal.Y);
this.chunk.Write(230, trace.Normal.Z);
this.WriteXData(trace.XData);
}
/// <summary>
/// Creates a new Trace that is a copy of the current instance.
/// </summary>
/// <returns>A new Trace that is a copy of this instance.</returns>
public override object Clone()
{
Trace entity = new Trace
{
//EntityObject properties
Layer = (Layer)this.layer.Clone(),
LineType = (LineType)this.lineType.Clone(),
Color = (AciColor)this.color.Clone(),
Lineweight = (Lineweight)this.lineweight.Clone(),
Transparency = (Transparency)this.transparency.Clone(),
LineTypeScale = this.lineTypeScale,
Normal = this.normal,
//Solid properties
FirstVertex = this.firstVertex,
SecondVertex = this.secondVertex,
ThirdVertex = this.thirdVertex,
FourthVertex = this.fourthVertex,
Thickness = this.thickness
};
foreach (XData data in this.XData.Values)
entity.XData.Add((XData)data.Clone());
return entity;
}
private Trace ReadTrace()
{
Vector3 v0 = Vector3.Zero;
Vector3 v1 = Vector3.Zero;
Vector3 v2 = Vector3.Zero;
Vector3 v3 = Vector3.Zero;
double thickness = 0.0;
Vector3 normal = Vector3.UnitZ;
List<XData> xData = new List<XData>();
this.chunk.Next();
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 10:
v0.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 20:
v0.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 30:
v0.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 11:
v1.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 21:
v1.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 31:
v1.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 12:
v2.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 22:
v2.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 32:
v2.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 13:
v3.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 23:
v3.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 33:
v3.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 70:
thickness = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 210:
normal.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 220:
normal.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 230:
normal.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 1001:
string appId = this.DecodeEncodedNonAsciiCharacters(this.chunk.ReadString());
XData data = this.ReadXDataRecord(this.GetApplicationRegistry(appId));
xData.Add(data);
break;
default:
if (this.chunk.Code >= 1000 && this.chunk.Code <= 1071)
throw new Exception("The extended data of an entity must start with the application registry code.");
this.chunk.Next();
break;
}
}
Trace entity = new Trace
{
FirstVertex = new Vector2(v0.X, v0.Y),
SecondVertex = new Vector2(v1.X, v1.Y),
ThirdVertex = new Vector2(v2.X, v2.Y),
FourthVertex = new Vector2(v3.X, v3.Y),
Elevation = v0.Z,
Thickness = thickness,
Normal = normal
};
entity.XData.AddRange(xData);
return entity;
}
private static void TraceEntity()
{
// The Trace entity behaves exactly as the Solid, they have the same properties and have the same graphical representation.
// They are a different entity since in AutoCad they show as two distinct types of objects.
// In any case, it is recommended to always use the Solid in its place.
Vector2 a = new Vector2(-1, -1);
Vector2 b = new Vector2(1, -1);
Vector2 c = new Vector2(-1, 1);
Vector2 d = new Vector2(1, 1);
Trace trace = new Trace(a, b, c, d);
trace.Normal = new Vector3(1, 1, 0);
trace.Elevation = 2;
DxfDocument doc = new DxfDocument();
doc.AddEntity(trace);
doc.Save("TraceEntity.dxf");
}