private void Load(string path)
{
var numberRegex = new Regex(@"-?[\d]+(?:\.[\d]*)?(e[-|+]?\d+)?", RegexOptions.IgnoreCase);
var faceRegex = new Regex(@"(\d+)/([\d]*)/([\d]*)", RegexOptions.IgnoreCase);
Vertices.Clear();
Normals.Clear();
Textures.Clear();
Faces.Clear();
foreach (var line in File.ReadLines(path).Where(line => numberRegex.IsMatch(line)))
{
var matches = numberRegex.Matches(line);
if (line.StartsWith("v "))
{
if (matches.Count != 3)
throw new FileLoadException("Error parsing vertices.");
Vertices.Add(
new Vector4 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value),
Z = float.Parse(matches[2].Value),
W = 1f
});
}
else if (line.StartsWith("vt "))
{
if (matches.Count != 2)
throw new FileLoadException("Error parsing textures.");
Textures.Add(
new Vector2 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value)
});
}
else if (line.StartsWith("vn "))
{
if (matches.Count != 3)
throw new FileLoadException("Error parsing normals.");
Normals.Add(
Vector3.Normalize(new Vector3 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value),
Z = float.Parse(matches[2].Value)
}));
}
else if (line.StartsWith("f "))
{
matches = faceRegex.Matches(line);
if (matches.Count != 4)
throw new FileLoadException("Error parsing faces.");
var face = new Face();
foreach (var i in Enumerable.Range(0, 4))
{
var point =
new Point {
PositionIndex = int.Parse(matches[i].Groups[1].Value) - 1,
TextureIndex = matches[i].Groups[2].Value == String.Empty ? 0 : int.Parse(matches[i].Groups[2].Value) - 1,
NormalIndex = int.Parse(matches[i].Groups[3].Value) - 1
};
face.Points.Add(point);
_pointIndexLookUp[point] = (uint) (Faces.Count * 4 + i);
}
Faces.Add(face);
var patch = new AccPatch {
Points = new List<Point>(face.Points),
Prefixes = new List<int>(),
Valences = new List<int>()
};
foreach (var point in face.Points)
{
if (_pointNeighborLookUp.ContainsKey(point.PositionIndex))
_pointNeighborLookUp[point.PositionIndex].Add(patch);
else
_pointNeighborLookUp[point.PositionIndex] = new List<AccPatch> { patch };
}
AccPatches.Add(patch);
}
}
}
private void Load(string path)
{
var numberRegex = new Regex(@"-?[\d]+(?:\.[\d]*)?(e[-|+]?\d+)?", RegexOptions.IgnoreCase);
var faceRegex = new Regex(@"(\d+)/([\d]*)/([\d]*)", RegexOptions.IgnoreCase);
Vertices.Clear();
Normals.Clear();
Textures.Clear();
Faces.Clear();
foreach (var line in File.ReadLines(path).Where(line => numberRegex.IsMatch(line)))
{
var matches = numberRegex.Matches(line);
if (line.StartsWith("v "))
{
if (matches.Count != 3)
{
throw new FileLoadException("Error parsing vertices.");
}
Vertices.Add(
new Vector4 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value),
Z = float.Parse(matches[2].Value),
W = 1f
});
}
else if (line.StartsWith("vt "))
{
if (matches.Count != 2)
{
throw new FileLoadException("Error parsing textures.");
}
Textures.Add(
new Vector2 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value)
});
}
else if (line.StartsWith("vn "))
{
if (matches.Count != 3)
{
throw new FileLoadException("Error parsing normals.");
}
Normals.Add(
Vector3.Normalize(new Vector3 {
X = float.Parse(matches[0].Value),
Y = float.Parse(matches[1].Value),
Z = float.Parse(matches[2].Value)
}));
}
else if (line.StartsWith("f "))
{
matches = faceRegex.Matches(line);
if (matches.Count != 4)
{
throw new FileLoadException("Error parsing faces.");
}
var face = new Face();
foreach (var i in Enumerable.Range(0, 4))
{
var point =
new Point {
PositionIndex = int.Parse(matches[i].Groups[1].Value) - 1,
TextureIndex = matches[i].Groups[2].Value == String.Empty ? 0 : int.Parse(matches[i].Groups[2].Value) - 1,
NormalIndex = int.Parse(matches[i].Groups[3].Value) - 1
};
face.Points.Add(point);
_pointIndexLookUp[point] = (uint)(Faces.Count * 4 + i);
}
Faces.Add(face);
var patch = new AccPatch {
Points = new List <Point>(face.Points),
Prefixes = new List <int>(),
Valences = new List <int>()
};
foreach (var point in face.Points)
{
if (_pointNeighborLookUp.ContainsKey(point.PositionIndex))
{
_pointNeighborLookUp[point.PositionIndex].Add(patch);
}
else
{
_pointNeighborLookUp[point.PositionIndex] = new List <AccPatch> {
patch
}
};
}
AccPatches.Add(patch);
}
}
}