/// <summary>Reads the STL document contained within the <paramref name="stream"/> into a new <see cref="STLDocument"/>.</summary>
/// <remarks>This method expects a text-based STL document to be contained within the <paramref name="reader"/>.</remarks>
/// <param name="reader">The reader which contains the text-based STL data.</param>
/// <returns>An <see cref="STLDocument"/> representing the data contained in the stream or null if the stream is empty.</returns>
public static STLDocument Read(StreamReader reader)
{
const string regexSolid = @"solid\s+(?<Name>[^\r\n]+)?";
if (reader == null)
{
return(null);
}
//Read the header.
string header = reader.ReadLine();
Match headerMatch = Regex.Match(header, regexSolid);
STLDocument stl = null;
Facet currentFacet = null;
//Check the header.
if (!headerMatch.Success)
{
throw new FormatException("Invalid STL header, expected \"solid [name]\" but found \"{0}\".".FormatString(header));
}
//Create the STL and extract the name (optional).
stl = new STLDocument()
{
Name = headerMatch.Groups["Name"].Value
};
//Read each facet until the end of the stream.
while ((currentFacet = Facet.Read(reader)) != null)
{
stl.Facets.Add(currentFacet);
}
return(stl);
}
/// <summary>Reads the STL document contained within the <paramref name="reader"/> into a new <see cref="STLDocument"/>.</summary>
/// <remarks>This method expects a text-based STL document to be contained within the <paramref name="reader"/>.</remarks>
/// <param name="reader">The reader which contains the text-based STL data.</param>
/// <returns>An <see cref="STLDocument"/> representing the data contained in the stream or null if the stream is empty.</returns>
public static STLDocument Read(StreamReader reader)
{
if (reader == null)
{
throw new NullReferenceException(nameof(reader));
}
const string regexSolid = @"solid\s+(?<Name>[^\r\n]+)?";
string? header = reader.ReadLine();
Match headerMatch;
STLDocument stl;
// Check the header.
if (header == null || !(headerMatch = Regex.Match(header, regexSolid)).Success)
{
throw new FormatException($"Invalid STL header, expected \"solid [name]\" but found: {header}");
}
// Create the STL and extract the name (optional).
stl = new STLDocument()
{
Name = headerMatch.Groups["Name"].Value
};
// Read each facet until the end of the stream.
while (!reader.EndOfStream)
{
// Peek the next char to make sure it's a facet (e.g. not "endsolid").
if (((char)reader.Peek()) == 'e')
{
break;
}
stl.Facets.Add(Facet.Read(reader));
}
return(stl);
}
/// <summary>Reads the STL document contained within the <paramref name="stream"/> into a new <see cref="STLDocument"/>.</summary>
/// <remarks>This method will expects a binary-based <see cref="STLDocument"/> to be contained within the <paramref name="reader"/>.</remarks>
/// <param name="reader">The reader which contains the binary-based STL data.</param>
/// <returns>An <see cref="STLDocument"/> representing the data contained in the stream or null if the stream is empty.</returns>
public static STLDocument Read(BinaryReader reader)
{
if (reader == null)
{
return(null);
}
byte[] buffer = new byte[80];
STLDocument stl = new STLDocument();
Facet currentFacet = null;
//Read (and ignore) the header and number of triangles.
buffer = reader.ReadBytes(80);
reader.ReadBytes(4);
//Read each facet until the end of the stream. Stop when the end of the stream is reached.
while ((reader.BaseStream.Position != reader.BaseStream.Length) && (currentFacet = Facet.Read(reader)) != null)
{
stl.Facets.Add(currentFacet);
}
return(stl);
}
