public static bool Load(ObjMesh mesh, string fileName)
{
try
{
using (var streamReader = new StreamReader(fileName))
{
Load(mesh, streamReader);
LoadTextures(mesh, fileName);
streamReader.Close();
return true;
}
}
catch { return false; }
}
static void LoadTextures(ObjMesh mesh, string filename)
{
string texdir = Path.GetFileNameWithoutExtension(filename);
string fulldir = @"Textures/"+texdir+@"/";
string[] files = Directory.GetFiles(fulldir);
var textureList = new List<ObjMesh.ObjTexture>();
foreach (string file in files)
{
string textureUniform = Path.GetFileNameWithoutExtension(file);
uint textureId;
TextureTarget textureTarget;
ImageDDS.LoadFromDisk(file, out textureId, out textureTarget);
GL.BindTexture(textureTarget, textureId);
GL.TexParameter(textureTarget, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
var mipMapCount = new int[1];
GL.GetTexParameter(textureTarget, GetTextureParameter.TextureMaxLevel, out mipMapCount[0]);
if (mipMapCount[0] == 0) GL.TexParameter(textureTarget, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
else GL.TexParameter(textureTarget, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
var newTexture = new ObjMesh.ObjTexture
{
TextureId = textureId,
TextureTarg = textureTarget,
TextureUniform = textureUniform
};
switch (textureUniform)
{
case "diffuse":
newTexture.TextureNumber = TextureUnit.Texture0;
break;
case "normal":
newTexture.TextureNumber = TextureUnit.Texture1;
break;
case "specular":
newTexture.TextureNumber = TextureUnit.Texture2;
break;
}
textureList.Add(newTexture);
}
mesh.Textures = textureList.ToArray();
}
static void Load(ObjMesh mesh, TextReader textReader)
{
_vertices = new List<Vector3>();
_normals = new List<Vector3>();
_texCoords = new List<Vector2>();
_objVertices = new List<ObjMesh.ObjVertex>();
_objTriangles = new List<ObjMesh.ObjTriangle>();
_objVerticesIndexDictionary = new Dictionary<ObjMesh.ObjVertex, int>();
_objQuads = new List<ObjMesh.ObjQuad>();
string line;
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]);
float y = float.Parse(parameters[2]);
float z = float.Parse(parameters[3]);
_vertices.Add(new Vector3(x, y, z));
break;
case "vt": // TexCoord
float u = float.Parse(parameters[1]);
float v = float.Parse(parameters[2]);
_texCoords.Add(new Vector2(u, v));
break;
case "vn": // Normal
float nx = float.Parse(parameters[1]);
float ny = float.Parse(parameters[2]);
float nz = float.Parse(parameters[3]);
_normals.Add(new Vector3(nx, ny, nz));
break;
case "f":
switch (parameters.Length)
{
case 4:
var objTriangle = new ObjMesh.ObjTriangle
{
Index0 = ParseFaceParameter(parameters[1]),
Index1 = ParseFaceParameter(parameters[2]),
Index2 = ParseFaceParameter(parameters[3])
};
_objTriangles.Add(objTriangle);
break;
case 5:
var objQuad = new ObjMesh.ObjQuad
{
Index0 = ParseFaceParameter(parameters[1]),
Index1 = ParseFaceParameter(parameters[2]),
Index2 = ParseFaceParameter(parameters[3]),
Index3 = ParseFaceParameter(parameters[4])
};
_objQuads.Add(objQuad);
break;
}
break;
}
}
// FillTangentData(); // Fill the triangles with tangents / bitangents
// IndexTangentsFix(); // Attempt to average the tangents / bitangents
mesh.Vertices = _objVertices.ToArray();
mesh.Triangles = _objTriangles.ToArray();
mesh.Quads = _objQuads.ToArray();
_objVerticesIndexDictionary = null;
_vertices = null;
_normals = null;
_texCoords = null;
_objVertices = null;
_objTriangles = null;
_objQuads = null;
}
