private void ProcessOffLine(string line, OffFileProcessorState state, ref bool ignoreFirstThreeNum)
{
// Trim out comments (allow comments trailing on a line)
int commentStart = line.IndexOf("OFF");
if (commentStart != -1)
{
line = line.Substring(0, commentStart);
}
// Tokenize line
string[] tokens = line.Split((char[])null, StringSplitOptions.RemoveEmptyEntries);
// Process line based on the keyword used
if (tokens.Length > 0)
{
int? v;
float x, y, z;
Vertex[] faceVertices;
int?[] vt, vn;
if (tokens.Length == 3)
{
if (!ignoreFirstThreeNum)
{
x = Single.Parse(tokens[0]);
y = Single.Parse(tokens[1]);
z = Single.Parse(tokens[2]);
Vertices.Add(new VertexTraits(x, y, z));
}
ignoreFirstThreeNum = false;
}
else if (tokens.Length == 4 || tokens.Length == 5)
{
faceVertices = new Vertex[tokens.Length - 1];
vt = new int?[tokens.Length - 1];
vn = new int?[tokens.Length - 1];
// Parse vertex/texture coordinate/normal indices
for (int i = 0; i < faceVertices.Length; ++i)
{
string[] vertexTokens = tokens[i + 1].Split("/".ToCharArray());
v = Int32.Parse(tokens[i + 1]);
if (vertexTokens.Length > 1 && vertexTokens[1].Length > 0)
{
vt[i] = Int32.Parse(vertexTokens[1]);
}
else
{
Traits.HasTextureCoordinates = false;
}
if (vertexTokens.Length > 2 && vertexTokens[2].Length > 0)
{
vn[i] = Int32.Parse(vertexTokens[2]);
}
else
{
Traits.HasFaceVertexNormals = false;
}
faceVertices[i] = Vertices[v.Value];
}
Face[] addedFaces = Faces.AddQuads(faceVertices);
// Set texture coordinates and normals if any are given
for (int i = 0; i < faceVertices.Length; ++i)
{
HalfEdge faceVertex;
if (vt[i].HasValue || vn[i].HasValue)
{
foreach (Face f in addedFaces)
{
faceVertex = f.FindHalfedgeTo(faceVertices[i]);
if (faceVertex != null) // Make sure vertex belongs to face if triangularization is on
{
if (vt[i].HasValue)
{
faceVertex.Traits.TextureCoordinate = state.VertexTextureCoords[vt[i].Value - 1];
}
if (vn[i].HasValue)
{
faceVertex.Traits.Normal = state.VertexNormals[vn[i].Value - 1];
}
}
}
}
}
}
}
}