public static StlFile Load(Stream stream)
{
var file = new StlFile();
var reader = new StlReader(stream);
file.SolidName = reader.ReadSolidName();
file.Triangles = reader.ReadTriangles();
return(file);
}
public void Write(StlFile file, Stream stream, bool asAscii)
{
if (asAscii)
{
WriteAscii(file, stream);
}
else
{
WriteBinary(file, stream);
}
}
private void WriteAscii(StlFile file, Stream stream)
{
var writer = new StreamWriter(stream);
writer.WriteLine($"solid {file.SolidName}");
foreach (var triangle in file.Triangles)
{
writer.WriteLine($" facet normal {NormalToString(triangle.Normal).Replace(",", ".")}");
writer.WriteLine(" outer loop");
writer.WriteLine($" vertex {VertexToString(triangle.Vertex1).Replace(",",".")}");
writer.WriteLine($" vertex {VertexToString(triangle.Vertex2).Replace(",", ".")}");
writer.WriteLine($" vertex {VertexToString(triangle.Vertex3).Replace(",", ".")}");
writer.WriteLine(" endloop");
writer.WriteLine(" endfacet");
}
writer.WriteLine($"endsolid {file.SolidName}");
writer.Flush();
}
private void WriteBinary(StlFile file, Stream stream)
{
var writer = new BinaryWriter(stream);
// write header
var header = new byte[80]; // can be a garbage value
writer.Write(header);
// write vertex count
writer.Write((uint)file.Triangles.Count);
// write triangles
foreach (var triangle in file.Triangles)
{
writer.Write(triangle.Normal.X);
writer.Write(triangle.Normal.Y);
writer.Write(triangle.Normal.Z);
writer.Write(triangle.Vertex1.X);
writer.Write(triangle.Vertex1.Y);
writer.Write(triangle.Vertex1.Z);
writer.Write(triangle.Vertex2.X);
writer.Write(triangle.Vertex2.Y);
writer.Write(triangle.Vertex2.Z);
writer.Write(triangle.Vertex3.X);
writer.Write(triangle.Vertex3.Y);
writer.Write(triangle.Vertex3.Z);
writer.Write((ushort)0); // garbage value
}
writer.Flush();
}
