/// <summary>
/// Read the STL file
/// </summary>
/// <returns>mesh defined in the file</returns>
public Mesh Read()
{
this._stream.Position = 0;
string header = this._stream.ReadString(80);
this.OnNotification?.Invoke(new NotificationArgs(header.Replace("\0", "")));
Mesh mesh = new Mesh();
LayerElementNormal normals = new LayerElementNormal();
mesh.Layers.Add(normals);
int nTriangles = this._stream.ReadInt <LittleEndianConverter>();
if (this.checkStreamLenth(nTriangles))
{
for (int i = 0; i < nTriangles; i++)
{
XYZ normal = new XYZ(this._stream.ReadSingle(), this._stream.ReadSingle(), this._stream.ReadSingle());
normals.Add(normal);
XYZ v1 = new XYZ(this._stream.ReadSingle(), this._stream.ReadSingle(), this._stream.ReadSingle());
XYZ v2 = new XYZ(this._stream.ReadSingle(), this._stream.ReadSingle(), this._stream.ReadSingle());
XYZ v3 = new XYZ(this._stream.ReadSingle(), this._stream.ReadSingle(), this._stream.ReadSingle());
mesh.AddTriangles(v1, v2, v3);
ushort attByteCount = this._stream.ReadUShort();
}
}
else
{
this._stream.Position = 0;
string line = this._stream.ReadUntil('\n');
string name = Regex.Match(line, @"solid \s\n", options: RegexOptions.IgnoreCase).Value;
mesh.Name = name;
line = this._stream.ReadUntil('\n');
while (!line.Contains($"endsolid {name}"))
{
XYZ normal = this.readPoint(line, "facet normal");
normals.Add(normal);
this.checkLine(this._stream.ReadUntil('\n'), "outer loop");
XYZ v1 = this.readPoint(this._stream.ReadUntil('\n'), "vertex");
XYZ v2 = this.readPoint(this._stream.ReadUntil('\n'), "vertex");
XYZ v3 = this.readPoint(this._stream.ReadUntil('\n'), "vertex");
mesh.AddTriangles(v1, v2, v3);
this.checkLine(this._stream.ReadUntil('\n'), "endloop");
this.checkLine(this._stream.ReadUntil('\n'), "endfacet");
line = this._stream.ReadUntil('\n');
}
}
return(mesh);
}