public static bool Load(WavefrontModel model, string fileName)
{
try
{
using (StreamReader streamReader = new StreamReader(Config.DATA_FOLDER + fileName))
{
bool success = Load(model, streamReader);
streamReader.Close();
// cleanup
vertices = null;
uniqueNormals = null;
normals = null;
uniqueUVs = null;
uvs = null;
indices = null;
return(success);
}
}
catch (Exception e)
{
Log.WriteLine(Log.LOG_ERROR, "WavefrontLoader: " + e.Message);
return(false);
}
}
static bool Load(WavefrontModel model, TextReader textReader)
{
// if help needed: https://github.com/53V3N1X/SevenEngine/blob/1e20e0ea38854a44966557e3bfc0bca605214aaa/SevenEngine/MANAGERS/StaticModelManager.cs
bool usingNormals = false;
vertices = new List <Vector3>();
normals = new List <Vector3>();
uniqueNormals = new List <Vector3>();
uvs = new List <Vector2>();
uniqueUVs = new List <Vector2>();
indices = new List <int>();
CultureInfo culture = CultureInfo.CreateSpecificCulture("en-us");
string line = "";
PrimitiveType faceType = PrimitiveType.Triangles;
while ((line = textReader.ReadLine()) != null)
{
line = line.Trim(splitCharacters);
line = line.Replace(" ", " ");
string[] parameters = line.Split(splitCharacters);
switch (parameters[0])
{
case "p": // Point
break;
case "v": // vertex
float x = float.Parse(parameters[1], culture);
float y = float.Parse(parameters[2], culture);
float z = float.Parse(parameters[3], culture);
vertices.Add(new Vector3(x, y, z));
uvs.Add(Vector2.Zero);
normals.Add(Vector3.Zero);
break;
case "vn": // vertex normal
usingNormals = true;
float nx = float.Parse(parameters[1], culture);
float ny = float.Parse(parameters[2], culture);
float nz = float.Parse(parameters[3], culture);
uniqueNormals.Add(new Vector3(nx, ny, nz));
break;
case "vt": // vertex texCoord (UV)
float u = float.Parse(parameters[1], culture);
float v = float.Parse(parameters[2], culture);
uniqueUVs.Add(new Vector2(u, v));
break;
case "f": // face
int id;
faceType = parameters.Length == 4 ? PrimitiveType.Triangles : PrimitiveType.Quads;
switch (faceType)
{
case PrimitiveType.Triangles: // 3 vertices per face
id = indexFromFaceParameter(parameters[1], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[1], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[1], 2)];
}
indices.Add(id);
id = indexFromFaceParameter(parameters[2], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[2], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[2], 2)];
}
indices.Add(id);
id = indexFromFaceParameter(parameters[3], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[3], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[3], 2)];
}
indices.Add(id);
break;
case PrimitiveType.Quads: // 4 vertices per face
id = indexFromFaceParameter(parameters[1], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[1], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[1], 2)];
}
indices.Add(id);
id = indexFromFaceParameter(parameters[2], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[2], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[2], 2)];
}
indices.Add(id);
id = indexFromFaceParameter(parameters[3], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[3], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[3], 2)];
}
indices.Add(id);
id = indexFromFaceParameter(parameters[4], 0);
uvs[id] = uniqueUVs[indexFromFaceParameter(parameters[4], 1)];
if (usingNormals)
{
normals[id] = uniqueNormals[indexFromFaceParameter(parameters[4], 2)];
}
indices.Add(id);
break;
default:
Log.WriteLine(Log.LOG_ERROR, "WavefrontLoader: invalid number of vertices per face (" + (parameters.Length - 1).ToString() + ")");
return(false); // different formats are not supported
}
break;
}
}
model.PolygonType = faceType;
model.Vertices = vertices.ToArray();
model.Indices = indices.ToArray();
model.TexCoords = uvs.ToArray();
if (!usingNormals)
{
normals = new List <Vector3>();
}
model.Normals = normals.ToArray();
return(true);
}
