private MaterialFromObj createImplicitMaterial()
{
MaterialFromObj makeMaterial = new MaterialFromObj();
materials.Add(makeMaterial);
makeMaterial.name = "[ Implicit Material ]";
return(makeMaterial);
}
private void parseOBJ(StreamReader sr)
{
MaterialFromObj currentMaterial = null;
//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(readVector3(lineContent, null));
break;
case "vn": // vertex normal direction vector
normals.Add(readVector3(lineContent, null));
break;
case "vt": // Vertex texcoordinate
texCoords.Add(readVector2_UV(lineContent, null));
break;
case "f": // Face
string[] values = 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++)
{
string[] indexes = values[i].Split('/'); // "loc_index[/tex_index[/normal_index]]"
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++;
if (indexes.Length > 1)
{
int iTexCoord = int.Parse(indexes[1]) - 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;
parseMTL(mtlFile);
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].name))
{
found = true;
currentMaterial = materials[i];
}
}
if (!found)
{
throw new Exception("Materials are already loaded so we should have it!");
}
break;
}
next_line:
//Read the next line
line = sr.ReadLine();
}
//close the file
sr.Close();
}
/// <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>
public void parseMTL(string file)
{
MaterialFromObj parseMaterial = new MaterialFromObj();
bool first = true;
// ask the delegate to open the material file for us..
StreamReader sr = new StreamReader(this.opendelegate(file));
//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 "newmtl": // create new named material
if (!first)
{
materials.Add(parseMaterial);
parseMaterial = new MaterialFromObj();
}
first = false;
parseMaterial.name = lineContent;
break;
case "Ka": // ambient color
parseMaterial.vAmbient = readVector3(lineContent, null);
parseMaterial.hasAmbient = true;
break;
case "Kd": // diffuse color
parseMaterial.vDiffuse = readVector3(lineContent, null);
parseMaterial.hasDiffuse = true;
break;
case "Ks": // specular color (weighted by Ns)
parseMaterial.vSpecular = readVector3(lineContent, null);
parseMaterial.hasSpecular = true;
break;
case "Ns": // specular color weight
parseMaterial.vSpecularWeight = float.Parse(lineContent);
break;
case "d":
case "Tr": // transparency / dissolve (i.e. alpha)
parseMaterial.fTransparency = float.Parse(lineContent);
parseMaterial.hasTransparency = true;
break;
case "illum": // illumination mode
parseMaterial.hasIlluminationMode = true;
parseMaterial.illuminationMode = (WffObjIlluminationMode)int.Parse(lineContent);
break;
case "map_Kd": // diffuse color map
parseMaterial.diffuseTextureResourceName = lineContent;
break;
case "map_Ka": // ambient color map
parseMaterial.ambientTextureResourceName = lineContent;
break;
case "map_Ks": // specular color map
parseMaterial.specularTextureResourceName = lineContent;
break;
case "map_d": // alpha mask map
parseMaterial.alphaMaskTextureResourceName = lineContent;
parseMaterial.hasTransparency = true;
break;
case "bump":
case "map_bump": // bump map
parseMaterial.bumpTextureResourceName = lineContent;
break;
}
next_line:
//Read the next line
line = sr.ReadLine();
}
materials.Add(parseMaterial);
//close the file
sr.Close();
}
/// <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>
public void parseMTL(string file)
{
MaterialFromObj parseMaterial = new MaterialFromObj();
bool first = true;
// ask the delegate to open the material file for us..
StreamReader sr = new StreamReader(this.opendelegate(file));
//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 "newmtl": // create new named material
if (!first) {
materials.Add(parseMaterial);
parseMaterial = new MaterialFromObj();
}
first = false;
parseMaterial.name = lineContent;
break;
case "Ka": // ambient color
parseMaterial.vAmbient = readVector3(lineContent, null);
parseMaterial.hasAmbient = true;
break;
case "Kd": // diffuse color
parseMaterial.vDiffuse = readVector3(lineContent, null);
parseMaterial.hasDiffuse = true;
break;
case "Ks": // specular color (weighted by Ns)
parseMaterial.vSpecular = readVector3(lineContent,null);
parseMaterial.hasSpecular = true;
break;
case "Ns": // specular color weight
parseMaterial.vSpecularWeight = float.Parse(lineContent);
break;
case "d":
case "Tr": // transparency / dissolve (i.e. alpha)
parseMaterial.fTransparency = float.Parse(lineContent);
parseMaterial.hasTransparency = true;
break;
case "illum": // illumination mode
parseMaterial.hasIlluminationMode = true;
parseMaterial.illuminationMode = (WffObjIlluminationMode) int.Parse(lineContent);
break;
case "map_Kd": // diffuse color map
parseMaterial.diffuseTextureResourceName = lineContent;
break;
case "map_Ka": // ambient color map
parseMaterial.ambientTextureResourceName = lineContent;
break;
case "map_Ks": // specular color map
parseMaterial.specularTextureResourceName = lineContent;
break;
case "map_d": // alpha mask map
parseMaterial.alphaMaskTextureResourceName = lineContent;
parseMaterial.hasTransparency = true;
break;
case "bump":
case "map_bump": // bump map
parseMaterial.bumpTextureResourceName = lineContent;
break;
}
next_line:
//Read the next line
line = sr.ReadLine();
}
materials.Add(parseMaterial);
//close the file
sr.Close();
}
private MaterialFromObj createImplicitMaterial()
{
MaterialFromObj makeMaterial = new MaterialFromObj();
materials.Add(makeMaterial);
makeMaterial.name = "[ Implicit Material ]";
return makeMaterial;
}
