private void Parse(TextReader sr)
{
string buf;
// Read lines from the file until EOF
while ((buf = sr.ReadLine()) != null)
{
buf = buf.Trim();
if (string.IsNullOrEmpty(buf)) continue;
if (buf[0] == '#') continue;
string[] split = buf.Split(s_stringDelimiters, StringSplitOptions.RemoveEmptyEntries);
switch (buf[0])
{
case 'v': // vertex
switch (buf[1])
{
case ' ':
case '\t':
if (split.Length != 4) // v + 3 floats
throw new ApplicationException("Parse: Vertex split.Length is invalid");
m_positions.Add(float.Parse(split[1]));
m_positions.Add(float.Parse(split[2]));
m_positions.Add(float.Parse(split[3]));
break;
case 'n':
if (split.Length != 4) // vn + 3 floats
throw new ApplicationException("Parse: Normal split.Length is invalid");
m_normals.Add(float.Parse(split[1]));
m_normals.Add(float.Parse(split[2]));
m_normals.Add(float.Parse(split[3]));
break;
case 't':
if (split.Length != 3) // vt + 2 floats
throw new ApplicationException("Parse: TexCoord split.Length is invalid");
m_texcoords.Add(float.Parse(split[1]));
m_texcoords.Add(float.Parse(split[2]));
break;
default:
break;
}
break;
case 'f': // face
if (split.Length < 4) // f v/vt/vn v/vt/vn v/vt/vn ...
throw new ApplicationException("Parse: Face split.Length is invalid");
m_currentFaceSet.Sizes.Add(split.Length - 1);
for (int vi = 1; vi < split.Length; vi++)
{
string[] ptn = split[vi].Split('/');
if (ptn.Length == 3) // v/vt/vn or v//vn
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[2]) - 1);
m_currentFaceSet.HasNormals = true;
if (!string.IsNullOrEmpty(ptn[1]))
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[1]) - 1);
m_currentFaceSet.HasTexCoords = true;
}
}
else if (ptn.Length == 2) // v/vt/
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[1]) - 1);
m_currentFaceSet.HasTexCoords = true;
}
m_currentFaceSet.Indices.Add(int.Parse(ptn[0]) - 1); // v or v// or v/vt/vn
}
break;
case 'm': // material
if (split.Length == 2)
{
var uri = new Uri(m_resolvedUri, split[1]);
string fullPath = Uri.UnescapeDataString(uri.AbsolutePath);
m_mtl = new MtlFile { Name = Path.GetFileName(fullPath) };
m_mtl.Read(fullPath);
}
break;
case 'g': // group
case 'o': // object
if (split.Length >= 2) // g + groupName + ...
{
string curMatName = m_currentFaceSet.MaterialName;
// Find group, otherwise create new group
if (!m_groups.TryGetValue(split[1], out m_currentGroup))
{
m_currentGroup = new Group { Name = split[1] };
m_groups.Add(m_currentGroup.Name, m_currentGroup);
m_currentFaceSet = new FaceSet(curMatName);
m_currentGroup.FaceSets.Add(curMatName, m_currentFaceSet);
}
// Group exists
else
{
// Find faceset with current material, otherwise create new faceset with current material
if (!m_currentGroup.FaceSets.TryGetValue(curMatName, out m_currentFaceSet))
{
m_currentFaceSet = new FaceSet(curMatName);
m_currentGroup.FaceSets.Add(curMatName, m_currentFaceSet);
}
}
}
break;
case 'u':
if (split.Length != 2) // usemtl + mat name
throw new ApplicationException("Parse: Usemtl split.Length is invalid");
string matName = split[1];
// Find material by name
if (m_mtl.Materials.ContainsKey(matName))
{
// Find faceset with current material, otherwise create new faceset with current material
if (!m_currentGroup.FaceSets.TryGetValue(matName, out m_currentFaceSet))
{
m_currentFaceSet = new FaceSet(matName);
m_currentGroup.FaceSets.Add(matName, m_currentFaceSet);
}
}
else
Outputs.WriteLine(OutputMessageType.Warning, "Material not found: {0}", matName);
break;
default:
break;
}
}
if (m_groups.Count == 0)
m_groups.Add(m_currentGroup.Name, m_currentGroup);
if (m_currentGroup.FaceSets.Count == 0)
m_currentGroup.FaceSets[m_currentFaceSet.MaterialName] = m_currentFaceSet;
// Remove empty FaceSets and mark empty Groups
var delGrpList = new List<string>();
foreach (Group grp in m_groups.Values)
{
var delList = new List<string>();
foreach (FaceSet fs in grp.FaceSets.Values)
{
if (fs.Indices.Count == 0)
delList.Add(fs.MaterialName);
}
foreach (string fsName in delList)
grp.FaceSets.Remove(fsName);
if (grp.FaceSets.Count == 0)
delGrpList.Add(grp.Name);
}
// Remove empty groups
foreach (string grpn in delGrpList)
m_groups.Remove(grpn);
}
private void Parse(TextReader sr)
{
string buf;
// Read lines from the file until EOF
while ((buf = sr.ReadLine()) != null)
{
buf = buf.Trim();
if (string.IsNullOrEmpty(buf))
{
continue;
}
if (buf[0] == '#')
{
continue;
}
string[] split = buf.Split(s_stringDelimiters, StringSplitOptions.RemoveEmptyEntries);
switch (buf[0])
{
case 'v': // vertex
switch (buf[1])
{
case ' ':
case '\t':
if (split.Length != 4) // v + 3 floats
{
throw new ApplicationException("Parse: Vertex split.Length is invalid");
}
m_positions.Add(float.Parse(split[1]));
m_positions.Add(float.Parse(split[2]));
m_positions.Add(float.Parse(split[3]));
break;
case 'n':
if (split.Length != 4) // vn + 3 floats
{
throw new ApplicationException("Parse: Normal split.Length is invalid");
}
m_normals.Add(float.Parse(split[1]));
m_normals.Add(float.Parse(split[2]));
m_normals.Add(float.Parse(split[3]));
break;
case 't':
if (split.Length != 3) // vt + 2 floats
{
throw new ApplicationException("Parse: TexCoord split.Length is invalid");
}
m_texcoords.Add(float.Parse(split[1]));
m_texcoords.Add(float.Parse(split[2]));
break;
default:
break;
}
break;
case 'f': // face
if (split.Length < 4) // f v/vt/vn v/vt/vn v/vt/vn ...
{
throw new ApplicationException("Parse: Face split.Length is invalid");
}
m_currentFaceSet.Sizes.Add(split.Length - 1);
for (int vi = 1; vi < split.Length; vi++)
{
string[] ptn = split[vi].Split('/');
if (ptn.Length == 3) // v/vt/vn or v//vn
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[2]) - 1);
m_currentFaceSet.HasNormals = true;
if (!string.IsNullOrEmpty(ptn[1]))
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[1]) - 1);
m_currentFaceSet.HasTexCoords = true;
}
}
else if (ptn.Length == 2) // v/vt/
{
m_currentFaceSet.Indices.Add(int.Parse(ptn[1]) - 1);
m_currentFaceSet.HasTexCoords = true;
}
m_currentFaceSet.Indices.Add(int.Parse(ptn[0]) - 1); // v or v// or v/vt/vn
}
break;
case 'm': // material
if (split.Length == 2)
{
var uri = new Uri(m_resolvedUri, split[1]);
string fullPath = Uri.UnescapeDataString(uri.AbsolutePath);
m_mtl = new MtlFile {
Name = Path.GetFileName(fullPath)
};
m_mtl.Read(fullPath);
}
break;
case 'g': // group
case 'o': // object
if (split.Length >= 2) // g + groupName + ...
{
string curMatName = m_currentFaceSet.MaterialName;
// Find group, otherwise create new group
if (!m_groups.TryGetValue(split[1], out m_currentGroup))
{
m_currentGroup = new Group {
Name = split[1]
};
m_groups.Add(m_currentGroup.Name, m_currentGroup);
m_currentFaceSet = new FaceSet(curMatName);
m_currentGroup.FaceSets.Add(curMatName, m_currentFaceSet);
}
// Group exists
else
{
// Find faceset with current material, otherwise create new faceset with current material
if (!m_currentGroup.FaceSets.TryGetValue(curMatName, out m_currentFaceSet))
{
m_currentFaceSet = new FaceSet(curMatName);
m_currentGroup.FaceSets.Add(curMatName, m_currentFaceSet);
}
}
}
break;
case 'u':
if (split.Length != 2) // usemtl + mat name
{
throw new ApplicationException("Parse: Usemtl split.Length is invalid");
}
string matName = split[1];
// Find material by name
if (m_mtl.Materials.ContainsKey(matName))
{
// Find faceset with current material, otherwise create new faceset with current material
if (!m_currentGroup.FaceSets.TryGetValue(matName, out m_currentFaceSet))
{
m_currentFaceSet = new FaceSet(matName);
m_currentGroup.FaceSets.Add(matName, m_currentFaceSet);
}
}
else
{
Outputs.WriteLine(OutputMessageType.Warning, "Material not found: {0}", matName);
}
break;
default:
break;
}
}
if (m_groups.Count == 0)
{
m_groups.Add(m_currentGroup.Name, m_currentGroup);
}
if (m_currentGroup.FaceSets.Count == 0)
{
m_currentGroup.FaceSets[m_currentFaceSet.MaterialName] = m_currentFaceSet;
}
// Remove empty FaceSets and mark empty Groups
var delGrpList = new List <string>();
foreach (Group grp in m_groups.Values)
{
var delList = new List <string>();
foreach (FaceSet fs in grp.FaceSets.Values)
{
if (fs.Indices.Count == 0)
{
delList.Add(fs.MaterialName);
}
}
foreach (string fsName in delList)
{
grp.FaceSets.Remove(fsName);
}
if (grp.FaceSets.Count == 0)
{
delGrpList.Add(grp.Name);
}
}
// Remove empty groups
foreach (string grpn in delGrpList)
{
m_groups.Remove(grpn);
}
}
