public virtual void Read(out Mesh mesh, IProgressListener listener = null)
{
mesh = new Mesh();
Regex r = new Regex(@" |//");
NumberStyles numberStyle = NumberStyles.Float;
IFormatProvider numberFormatProvider = CultureInfo.InvariantCulture;
if (listener != null)
{
listener.OnStarted("Load mesh");
}
int indicesCount = 0;
while (m_Reader.Peek() >= 0)
{
string line = m_Reader.ReadLine();
String[] elements = r.Split(line);
// List<Vertex> normals;
switch (elements[0])
{
case "v":
{
float x, y, z;
if (
float.TryParse(elements[1], numberStyle, numberFormatProvider, out x) &&
float.TryParse(elements[2], numberStyle, numberFormatProvider, out y) &&
float.TryParse(elements[3], numberStyle, numberFormatProvider, out z)
)
{
mesh.Vertices.Add(++indicesCount, new Vertex(new Vector3(x, y, z)));
}
else
{
Trace.WriteLine(line);
}
break;
}
case "f":
{
int f1, f2, f3;
int f1Index = 1;
int f2Index = 2;
int f3Index = 3;
switch (elements.Length)
{
case 7:
{
//normal indexes in elements[2],elements[4] and elements[6] are ignored;
f1Index = 1;
f2Index = 3;
f3Index = 5;
goto case 4;
}
case 4:
{
if (
int.TryParse(elements[f1Index], numberStyle, numberFormatProvider, out f1) &&
int.TryParse(elements[f2Index], numberStyle, numberFormatProvider, out f2) &&
int.TryParse(elements[f3Index], numberStyle, numberFormatProvider, out f3)
)
{
mesh.Faces.Add(new Triangle(f1, f2, f3));
}
else
{
Trace.WriteLine(line);
throw new NotImplementedException("Only triangles are Implemented. Faces in file are not a triangles.That is bad:(");
}
}
break;
default:
Trace.WriteLine("Invalid number of components");
break;
}
break;
}
case "vn":
{
break;
}
default:
Trace.WriteLine("Unknown obj specifier.");
break;
}
if (listener != null)
{
listener.OnStep(
m_Reader.BaseStream.Position,
m_Reader.BaseStream.Length);
}
}
if (listener != null)
{
listener.OnComplete("Mesh loaded successfully");
}
mesh.Invalidate(listener, Mesh.InvalidateFlags.Faces);
}
public void WriteMesh(ref Mesh mesh, IProgressListener listener = null)
{
long current = 0;
long total = mesh.Vertices.Count + mesh.Faces.Count;
listener.OnStarted("Mesh write");
foreach (var vertex in mesh.Vertices)
{
m_Writer.WriteLine(string.Format(
CultureInfo.InvariantCulture,
"v {0} {1} {2}",
vertex.Value.Position.X.ToString("0.000000", CultureInfo.InvariantCulture),
vertex.Value.Position.Y.ToString("0.000000", CultureInfo.InvariantCulture),
vertex.Value.Position.Z.ToString("0.000000", CultureInfo.InvariantCulture)));
++current;
if (listener != null)
{
listener.OnStep(current, total);
}
}
int count = 0;
foreach (var face in mesh.Faces)
{
m_Writer.WriteLine(string.Format(CultureInfo.InvariantCulture, "f {0} {1} {2}",
face[0], face[1], face[2]));
++count;
++current;
if (listener != null)
{
listener.OnStep(current, total);
}
}
if (listener != null)
{
listener.OnComplete("Mesh write");
}
m_Writer.Close();
}
