public static OBJVolume LoadFromFile(string filename)
{
OBJVolume obj = new OBJVolume();
string path = Path.Combine("Assets", "Models", filename);
try
{
using (StreamReader reader = new StreamReader(new FileStream(path, FileMode.Open, FileAccess.Read)))
{
obj = LoadFromString(reader.ReadToEnd(), filename);
}
}
catch (FileNotFoundException e)
{
Console.WriteLine("!!! ERROR: obj file not found ({0}) !!!", filename);
}
catch (Exception e)
{
Console.WriteLine("!!! ERROR: cannot load obj ({0}) !!!", filename);
}
return(obj);
}
public static OBJVolume LoadFromFile(string filename)
{
OBJVolume obj = new OBJVolume();
string path = Path.Combine("Assets", "Models", filename);
try
{
using (StreamReader reader = new StreamReader(new FileStream(path, FileMode.Open, FileAccess.Read)))
{
obj = LoadFromString(reader.ReadToEnd(), filename);
}
}
catch (FileNotFoundException e)
{
Console.WriteLine("!!! ERROR: obj file not found ({0}) !!!", filename);
}
catch (Exception e)
{
Console.WriteLine("!!! ERROR: cannot load obj ({0}) !!!", filename);
}
return obj;
}
public static OBJVolume LoadFromString(string obj, string filename = null)
{
List <string> lines = new List <string>(obj.Split('\n'));
List <Vector3> vertices = new List <Vector3>();
List <Vector2> textureCoords = new List <Vector2>();
var faces = new List <Tuple <TempVertex, TempVertex, TempVertex> >();
vertices.Add(new Vector3());
textureCoords.Add(new Vector2());
foreach (string l in lines)
{
if (l.StartsWith("v "))
{
// remove 'v '
string temp = l.Substring(2);
Vector3 v = new Vector3();
// Check if there's enough elements for a vertex (3)
if (temp.Count((char c) => c == ' ') == 2)
{
string[] vertParts = temp.Split(' ');
bool success = float.TryParse(vertParts[0], out v.X);
success |= float.TryParse(vertParts[1], out v.Y);
success |= float.TryParse(vertParts[2], out v.Z);
if (!success)
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse vertex (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse vertex (line: {0}, from string) !!!",
l);
}
}
}
vertices.Add(v);
}
else if (l.StartsWith("vt "))
{
// cut off 'vt '
string temp = l.Substring(3);
Vector2 v = new Vector2();
// Check if there's enough elements for a vertex
if (temp.Trim().Count((char c) => c == ' ') > 0)
{
string[] textureCoordParts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
bool success = float.TryParse(textureCoordParts[0], out v.X);
success |= float.TryParse(textureCoordParts[1], out v.Y);
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, from string) !!!",
l);
}
}
else
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, from string) !!!",
l);
}
}
textureCoords.Add(v);
}
else if (l.StartsWith("f "))
{
// remove 'f '
string temp = l.Substring(2);
var face = new Tuple <TempVertex, TempVertex, TempVertex>
(
new TempVertex(),
new TempVertex(),
new TempVertex()
);
// Check if there's enough elements for a face (3)
if (temp.Trim().Count((char c) => c == ' ') == 2)
{
string[] faceParts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
int i1, i2, i3;
int t1, t2, t3;
bool success = int.TryParse(faceParts[0].Split('/')[0], out i1);
success |= int.TryParse(faceParts[1].Split('/')[0], out i2);
success |= int.TryParse(faceParts[2].Split('/')[0], out i3);
if (faceParts[0].Count((char c) => c == '/') == 2)
{
success |= int.TryParse(faceParts[0].Split('/')[1], out t1);
success |= int.TryParse(faceParts[1].Split('/')[1], out t2);
success |= int.TryParse(faceParts[2].Split('/')[1], out t3);
}
else
{
t1 = i1;
t2 = i2;
t3 = i3;
}
if (!success)
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse face (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse face (line: {0}, from string) !!!",
l);
}
}
else
{
TempVertex v1 = new TempVertex(i1, 0, t1);
TempVertex v2 = new TempVertex(i2, 0, t2);
TempVertex v3 = new TempVertex(i3, 0, t3);
if (textureCoords.Count < t1)
{
textureCoords.Add(new Vector2());
}
if (textureCoords.Count < t2)
{
textureCoords.Add(new Vector2());
}
if (textureCoords.Count < t3)
{
textureCoords.Add(new Vector2());
}
face = new Tuple <TempVertex, TempVertex, TempVertex>(v1, v2, v3);
faces.Add(face);
}
}
}
}
OBJVolume volume = new OBJVolume();
textureCoords.Add(new Vector2());
textureCoords.Add(new Vector2());
textureCoords.Add(new Vector2());
foreach (var f in faces)
{
FaceVertex v1 = new FaceVertex
(
vertices[f.Item1.Vertex],
new Vector3(),
textureCoords[f.Item1.TextureCoord]
);
FaceVertex v2 = new FaceVertex
(
vertices[f.Item2.Vertex],
new Vector3(),
textureCoords[f.Item2.TextureCoord]
);
FaceVertex v3 = new FaceVertex
(
vertices[f.Item3.Vertex],
new Vector3(),
textureCoords[f.Item3.TextureCoord]
);
volume.faces.Add(new Tuple <FaceVertex, FaceVertex, FaceVertex>(v1, v2, v3));
}
return(volume);
}
public static OBJVolume LoadFromString(string obj, string filename = null)
{
List<string> lines = new List<string>(obj.Split('\n'));
List<Vector3> vertices = new List<Vector3>();
List<Vector2> textureCoords = new List<Vector2>();
var faces = new List<Tuple<TempVertex, TempVertex, TempVertex>>();
vertices.Add(new Vector3());
textureCoords.Add(new Vector2());
foreach (string l in lines)
{
if (l.StartsWith("v "))
{
// remove 'v '
string temp = l.Substring(2);
Vector3 v = new Vector3();
// Check if there's enough elements for a vertex (3)
if (temp.Count((char c) => c == ' ') == 2)
{
string[] vertParts = temp.Split(' ');
bool success = float.TryParse(vertParts[0], out v.X);
success |= float.TryParse(vertParts[1], out v.Y);
success |= float.TryParse(vertParts[2], out v.Z);
if (!success)
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse vertex (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse vertex (line: {0}, from string) !!!",
l);
}
}
}
vertices.Add(v);
}
else if (l.StartsWith("vt "))
{
// cut off 'vt '
string temp = l.Substring(3);
Vector2 v = new Vector2();
// Check if there's enough elements for a vertex
if (temp.Trim().Count((char c) => c == ' ') > 0)
{
string[] textureCoordParts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
bool success = float.TryParse(textureCoordParts[0], out v.X);
success |= float.TryParse(textureCoordParts[1], out v.Y);
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, from string) !!!",
l);
}
}
else
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse texture coordinate (line: {0}, from string) !!!",
l);
}
}
textureCoords.Add(v);
}
else if (l.StartsWith("f "))
{
// remove 'f '
string temp = l.Substring(2);
var face = new Tuple<TempVertex, TempVertex, TempVertex>
(
new TempVertex(),
new TempVertex(),
new TempVertex()
);
// Check if there's enough elements for a face (3)
if (temp.Trim().Count((char c) => c == ' ') == 2)
{
string[] faceParts = temp.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
int i1, i2, i3;
int t1, t2, t3;
bool success = int.TryParse(faceParts[0].Split('/')[0], out i1);
success |= int.TryParse(faceParts[1].Split('/')[0], out i2);
success |= int.TryParse(faceParts[2].Split('/')[0], out i3);
if (faceParts[0].Count((char c) => c == '/') == 2)
{
success |= int.TryParse(faceParts[0].Split('/')[1], out t1);
success |= int.TryParse(faceParts[1].Split('/')[1], out t2);
success |= int.TryParse(faceParts[2].Split('/')[1], out t3);
}
else
{
t1 = i1;
t2 = i2;
t3 = i3;
}
if (!success)
{
if (filename != null)
{
Console.WriteLine("!!! ERROR: cannot parse face (line: {0}, file: {1}) !!!",
l, filename);
}
else
{
Console.WriteLine("!!! ERROR: cannot parse face (line: {0}, from string) !!!",
l);
}
}
else
{
TempVertex v1 = new TempVertex(i1, 0, t1);
TempVertex v2 = new TempVertex(i2, 0, t2);
TempVertex v3 = new TempVertex(i3, 0, t3);
if (textureCoords.Count < t1)
{
textureCoords.Add(new Vector2());
}
if (textureCoords.Count < t2)
{
textureCoords.Add(new Vector2());
}
if (textureCoords.Count < t3)
{
textureCoords.Add(new Vector2());
}
face = new Tuple<TempVertex, TempVertex, TempVertex>(v1, v2, v3);
faces.Add(face);
}
}
}
}
OBJVolume volume = new OBJVolume();
textureCoords.Add(new Vector2());
textureCoords.Add(new Vector2());
textureCoords.Add(new Vector2());
foreach (var f in faces)
{
FaceVertex v1 = new FaceVertex
(
vertices[f.Item1.Vertex],
new Vector3(),
textureCoords[f.Item1.TextureCoord]
);
FaceVertex v2 = new FaceVertex
(
vertices[f.Item2.Vertex],
new Vector3(),
textureCoords[f.Item2.TextureCoord]
);
FaceVertex v3 = new FaceVertex
(
vertices[f.Item3.Vertex],
new Vector3(),
textureCoords[f.Item3.TextureCoord]
);
volume.faces.Add(new Tuple<FaceVertex, FaceVertex, FaceVertex>(v1, v2, v3));
}
return volume;
}
