/// <summary>
/// This method is used to load information stored in .mtl files referenced by the .obj file.
/// </summary>
/// <param name="d3ddevice"></param>
/// <param name="file"></param>
private void parseOBJ(string basePath, string filename)
{
MaterialInfoWithFaces currentMaterial = null;
StreamReader sr = SSAssetManager.OpenStreamReader(Path.Combine(basePath, filename));
//Read the first line of text
string line = sr.ReadLine();
//Continue to read until you reach end of file
while (line != null)
{
// handle line continuation with "\"
if (line.Length > 0)
{
while (line[line.Length - 1] == '\\')
{
line = line.Substring(0, line.Length - 1); // remove line extender..
var nextline = sr.ReadLine();
if (nextline != null && nextline.Length != 0)
{
line = line + nextline; // merge with next line
}
else
{
break; // be sure to avoid infinite loop...
}
}
}
// split the line into tokens, separated by space
string[] tokens = line.Split(" ".ToArray(), 2);
if (tokens.Length < 2)
{
goto next_line;
}
string firstToken = tokens[0];
string lineContent = tokens[1];
switch (firstToken)
{
/* unsupported features - fatal */
case "cstype": // curved surface type (bmatrix, bezier, bspline, cardinal, taylor)
case "deg": // curve attr: degree
case "step": // curve attr: step size
case "bmat": // curve attr: basis matrix
case "surf": // surface
case "parm": // curve body: paramater value
case "trim": // curve body: outer trimming loop
case "hole": // curve body: inner trimming loop
case "scrv": // curve body: special curve
case "sp": // curve body: special point
case "end": // curve body: end
case "con": // connection between free form surfaces
case "vp": // paramater space vertex (for free form surfaces)
case "bevel": // bevel interpolation
case "c_interp": // color interpolation
case "d_interp": // dissolve interpolation
case "lod": // level of detail
case "ctech": // Curve approximation technique
case "stech": // Surface approximation technique
case "mg": // merging group (for free form surfaces)
throw new WavefrontObjParseException("WavefrontObjLoader.cs: fatal error, token not supported : " + firstToken);
/* unsupported features - warning */
case "o": // object name
case "g": // group name
case "s": // smoothing group
case "shadow_obj": // shadow casting
case "trace_obj": // ray tracing
Console.WriteLine("WavefrontObjLoader.cs: warning - unsupported wavefront token : " + firstToken);
break;
/* supported features */
case "#": // Nothing to read, these are comments.
break;
case "v": // Vertex position
positions.Add(WavefrontParser.readVector4(lineContent, null));
break;
case "vn": // vertex normal direction vector
normals.Add(WavefrontParser.readVector3(lineContent, null));
break;
case "vt": // Vertex texcoordinate
texCoords.Add(WavefrontParser.readVector2(lineContent, null));
break;
case "f": // Face
string[] values = WavefrontParser.FilteredSplit(lineContent, null);
int numPoints = values.Length;
Face face = new Face();
face.v_idx = new Int16[numPoints];
face.n_idx = new Int16[numPoints];
face.tex_idx = new Int16[numPoints]; // todo: how do outside clients know if there were texcoords or not?!?!
for (int i = 0; i < numPoints; i++)
{
// format is "loc_index[/tex_index[/normal_index]]" e.g. 3 ; 3/2 ; 3/2/5
// but middle part can me empty, e.g. 3//5
string[] indexes = values[i].Split('/');
int iPosition = (int.Parse(indexes[0]) - 1); // adjust 1-based index
if (iPosition < 0)
{
iPosition += positions.Count + 1;
} // adjust negative indicies
face.v_idx[i] = (Int16)iPosition;
numIndices++;
// initialize other indicies to not provided, in case they are missing
face.n_idx[i] = -1;
face.tex_idx[i] = -1;
if (indexes.Length > 1)
{
string tex_index = indexes[1];
if (tex_index != "")
{
int iTexCoord = int.Parse(tex_index) - 1; // adjust 1-based index
if (iTexCoord < 0)
{
iTexCoord += texCoords.Count + 1;
} // adjust negative indicies
face.tex_idx[i] = (Int16)iTexCoord;
}
if (indexes.Length > 2)
{
hasNormals = true;
int iNormal = int.Parse(indexes[2]) - 1; // adjust 1 based index
if (iNormal < 0)
{
iNormal += normals.Count + 1;
} // adjust negative indicies
face.n_idx[i] = (Int16)iNormal;
}
}
}
if (currentMaterial == null)
{
// no material in file, so create one
currentMaterial = createImplicitMaterial();
}
currentMaterial.faces.Add(face);
currentMaterial.nbrIndices += face.v_idx.Length;
numFaces++;
break;
case "mtllib": // load named material file
string mtlFile = lineContent;
{
var mtls = SSWavefrontMTLInfo.ReadMTLs(Path.Combine(basePath, mtlFile));
foreach (var mtl in mtls)
{
materials.Add(new MaterialInfoWithFaces(mtl));
}
}
break;
case "usemtl": // use named material (from material file previously loaded)
bool found = false;
string matName = lineContent;
for (int i = 0; i < materials.Count; i++)
{
if (matName.Equals(materials[i].mtl.name))
{
found = true;
currentMaterial = materials[i];
}
}
if (!found)
{
throw new WavefrontObjParseException("Materials are already loaded so we should have it!");
}
break;
}
next_line:
//Read the next line
line = sr.ReadLine();
}
//close the file
sr.Close();
// debug print loaded stats
Console.WriteLine("WavefrontObjLoader.cs: file processed...");
Console.WriteLine(" vertex positions: {0}", positions.Count);
Console.WriteLine(" vertex normals: {0}", normals.Count);
Console.WriteLine(" vertex texCoords: {0}", texCoords.Count);
foreach (var mtl in materials)
{
Console.WriteLine(
" Material: faces: {1} indicies: {2} ({0})", mtl.mtl.name, mtl.faces.Count, mtl.nbrIndices);
Console.WriteLine(
" diff Tex: {0}", mtl.mtl.diffuseTextureResourceName);
}
Console.WriteLine("WavefrontObjLoader.cs: end.");
}
/// <summary>
/// This method is used to load information stored in .mtl files referenced by the .obj file.
/// </summary>
/// <param name="d3ddevice"></param>
/// <param name="file"></param>
private void parseOBJ(SSAssetManager.Context ctx, string filename)
{
MaterialInfoWithFaces currentMaterial = null;
StreamReader sr = ctx.OpenText(filename);
//Read the first line of text
string line = sr.ReadLine();
//Continue to read until you reach end of file
while (line != null)
{
string[] tokens = line.Split(" ".ToArray(), 2);
if (tokens.Length < 2)
{
goto next_line;
}
string firstToken = tokens[0];
string lineContent = tokens[1];
switch (firstToken)
{
case "#": // Nothing to read, these are comments.
break;
case "v": // Vertex position
positions.Add(WavefrontParser.readVector4(lineContent, null));
break;
case "vn": // vertex normal direction vector
normals.Add(WavefrontParser.readVector3(lineContent, null));
break;
case "vt": // Vertex texcoordinate
texCoords.Add(WavefrontParser.readVector2(lineContent, null));
break;
case "f": // Face
string[] values = WavefrontParser.FilteredSplit(lineContent, null);
int numPoints = values.Length;
Face face = new Face();
face.v_idx = new Int16[numPoints];
face.n_idx = new Int16[numPoints];
face.tex_idx = new Int16[numPoints]; // todo: how do outside clients know if there were texcoords or not?!?!
for (int i = 0; i < numPoints; i++)
{
// format is "loc_index[/tex_index[/normal_index]]" e.g. 3 ; 3/2 ; 3/2/5
// but middle part can me empty, e.g. 3//5
string[] indexes = values[i].Split('/');
int iPosition = (int.Parse(indexes[0]) - 1); // adjust 1-based index
if (iPosition < 0)
{
iPosition += positions.Count + 1;
} // adjust negative indicies
face.v_idx[i] = (Int16)iPosition;
numIndices++;
// initialize other indicies to not provided, in case they are missing
face.n_idx[i] = -1;
face.tex_idx[i] = -1;
if (indexes.Length > 1)
{
string tex_index = indexes[1];
if (tex_index != "")
{
int iTexCoord = int.Parse(tex_index) - 1; // adjust 1-based index
if (iTexCoord < 0)
{
iTexCoord += texCoords.Count + 1;
} // adjust negative indicies
face.tex_idx[i] = (Int16)iTexCoord;
}
if (indexes.Length > 2)
{
hasNormals = true;
int iNormal = int.Parse(indexes[2]) - 1; // adjust 1 based index
if (iNormal < 0)
{
iNormal += normals.Count + 1;
} // adjust negative indicies
face.n_idx[i] = (Int16)iNormal;
}
}
}
if (currentMaterial == null)
{
// no material in file, so create one
currentMaterial = createImplicitMaterial();
}
currentMaterial.faces.Add(face);
currentMaterial.nbrIndices += face.v_idx.Length;
numFaces++;
break;
case "mtllib": // load named material file
string mtlFile = lineContent;
{
var mtls = SSWavefrontMTLInfo.ReadMTLs(ctx, mtlFile);
foreach (var mtl in mtls)
{
materials.Add(new MaterialInfoWithFaces(mtl));
}
}
break;
case "usemtl": // use named material (from material file previously loaded)
bool found = false;
string matName = lineContent;
for (int i = 0; i < materials.Count; i++)
{
if (matName.Equals(materials[i].mtl.name))
{
found = true;
currentMaterial = materials[i];
}
}
if (!found)
{
throw new WavefrontObjParseException("Materials are already loaded so we should have it!");
}
break;
}
next_line:
//Read the next line
line = sr.ReadLine();
}
//close the file
sr.Close();
}