unsafe IOReadResult BuildMeshes_Simple(ReadOptions options, IMeshBuilder builder)
{
if (vPositions.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No vertices in file"));
}
if (vTriangles.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No triangles in file"));
}
// [TODO] support non-per-vertex normals/colors
bool bHaveNormals = (vNormals.Length == vPositions.Length);
bool bHaveColors = (vColors.Length == vPositions.Length);
bool bHaveUVs = (vUVs.Length / 2 == vPositions.Length / 3);
int nVertices = vPositions.Length / 3;
int[] mapV = new int[nVertices];
int meshID = builder.AppendNewMesh(bHaveNormals, bHaveColors, bHaveUVs, m_bOBJHasTriangleGroups);
for (int k = 0; k < nVertices; ++k)
{
Index3i vk = new Index3i(k, k, k);
mapV[k] = append_vertex(builder, vk, bHaveNormals, bHaveColors, bHaveUVs);
}
// [TODO] this doesn't handle missing vertices...
for (int k = 0; k < vTriangles.Length; ++k)
{
append_triangle(builder, k, mapV);
}
if (UsedMaterials.Count == 1) // [RMS] should not be in here otherwise
{
int material_id = UsedMaterials.Keys.First();
string sMatName = UsedMaterials[material_id];
OBJMaterial useMat = Materials[sMatName];
int matID = builder.BuildMaterial(useMat);
builder.AssignMaterial(matID, meshID);
}
return(new IOReadResult(IOCode.Ok, ""));
}
public IOReadResult ReadMaterials(string sPath)
{
if (nWarningLevel >= 1)
{
emit_warning("[OBJReader] ReadMaterials " + sPath);
}
StreamReader reader;
try {
reader = new StreamReader(sPath);
if (reader.EndOfStream)
{
return(new IOReadResult(IOCode.FileAccessError, ""));
}
} catch {
return(new IOReadResult(IOCode.FileAccessError, ""));
}
OBJMaterial curMaterial = null;
while (reader.Peek() >= 0)
{
string line = reader.ReadLine();
string[] tokens = line.Split((char[])null, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 0)
{
continue;
}
if (tokens[0][0] == '#')
{
continue;
}
else if (tokens[0] == "newmtl")
{
curMaterial = new OBJMaterial();
curMaterial.name = tokens[1];
curMaterial.id = Materials.Count;
if (Materials.ContainsKey(curMaterial.name))
{
emit_warning("Material file " + sPath + " / material " + curMaterial.name + " : already exists in Material set. Replacing.");
}
if (nWarningLevel >= 1)
{
emit_warning("[OBJReader] parsing material " + curMaterial.name);
}
Materials[curMaterial.name] = curMaterial;
}
else if (tokens[0] == "Ka")
{
if (curMaterial != null)
{
curMaterial.Ka = parse_mtl_color(tokens);
}
}
else if (tokens[0] == "Kd")
{
if (curMaterial != null)
{
curMaterial.Kd = parse_mtl_color(tokens);
}
}
else if (tokens[0] == "Ks")
{
if (curMaterial != null)
{
curMaterial.Ks = parse_mtl_color(tokens);
}
}
else if (tokens[0] == "Ke")
{
if (curMaterial != null)
{
curMaterial.Ke = parse_mtl_color(tokens);
}
}
else if (tokens[0] == "Tf")
{
if (curMaterial != null)
{
curMaterial.Tf = parse_mtl_color(tokens);
}
}
else if (tokens[0] == "illum")
{
if (curMaterial != null)
{
curMaterial.illum = int.Parse(tokens[1]);
}
}
else if (tokens[0] == "d")
{
if (curMaterial != null)
{
curMaterial.d = Single.Parse(tokens[1]);
}
}
else if (tokens[0] == "Tr") // alternate to d/alpha, [Tr]ansparency is 1-d
{
if (curMaterial != null)
{
curMaterial.d = 1.0f - Single.Parse(tokens[1]);
}
}
else if (tokens[0] == "Ns")
{
if (curMaterial != null)
{
curMaterial.Ns = Single.Parse(tokens[1]);
}
}
else if (tokens[0] == "sharpness")
{
if (curMaterial != null)
{
curMaterial.sharpness = Single.Parse(tokens[1]);
}
}
else if (tokens[0] == "Ni")
{
if (curMaterial != null)
{
curMaterial.Ni = Single.Parse(tokens[1]);
}
}
else if (tokens[0] == "map_Ka")
{
if (curMaterial != null)
{
curMaterial.map_Ka = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "map_Kd")
{
if (curMaterial != null)
{
curMaterial.map_Kd = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "map_Ks")
{
if (curMaterial != null)
{
curMaterial.map_Ks = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "map_Ke")
{
if (curMaterial != null)
{
curMaterial.map_Ke = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "map_d")
{
if (curMaterial != null)
{
curMaterial.map_d = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "map_Ns")
{
if (curMaterial != null)
{
curMaterial.map_Ns = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "bump" || tokens[0] == "map_bump")
{
if (curMaterial != null)
{
curMaterial.bump = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "disp")
{
if (curMaterial != null)
{
curMaterial.disp = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "decal")
{
if (curMaterial != null)
{
curMaterial.decal = parse_mtl_path(line, tokens);
}
}
else if (tokens[0] == "refl")
{
if (curMaterial != null)
{
curMaterial.refl = parse_mtl_path(line, tokens);
}
}
else
{
emit_warning("unknown material command " + tokens[0]);
}
}
if (nWarningLevel >= 1)
{
emit_warning("[OBJReader] ReadMaterials completed");
}
return(new IOReadResult(IOCode.Ok, "ok"));
}
private unsafe void append_face(string[] tokens, OBJMaterial activeMaterial, int nActiveGroup)
{
int nMode = 0;
if (tokens[1].IndexOf("//") != -1)
{
nMode = 1;
}
else if (tokens[1].IndexOf('/') != -1)
{
nMode = 2;
}
Triangle t = new Triangle();
t.clear();
for (int ti = 0; ti < tokens.Length - 1; ++ti)
{
int j = (ti < 3) ? ti : 2;
if (ti >= 3)
{
t.move_vertex(2, 1);
}
// parse next vertex
if (nMode == 0)
{
// "f v1 v2 v3"
t.set_vertex(j, parse_v(tokens[ti + 1]));
}
else if (nMode == 1)
{
// "f v1//vn1 v2//vn2 v3//vn3"
string[] parts = tokens[ti + 1].Split(this.splitDoubleSlash, StringSplitOptions.RemoveEmptyEntries);
t.set_vertex(j, parse_v(parts[0]), parse_n(parts[1]));
}
else if (nMode == 2)
{
string[] parts = tokens[ti + 1].Split(this.splitSlash, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length == 2)
{
// "f v1/vt1 v2/vt2 v3/vt3"
t.set_vertex(j, parse_v(parts[0]), -1, parse_u(parts[1]));
}
else if (parts.Length == 3)
{
// "f v1/vt1/vn1 v2/vt2/vn2 v3/vt3/vn3"
t.set_vertex(j, parse_v(parts[0]), parse_n(parts[2]), parse_u(parts[1]));
}
else
{
emit_warning("parse_triangle unexpected face component " + tokens[j]);
}
}
// do append
if (ti >= 2)
{
if (activeMaterial != null)
{
t.nMaterialID = activeMaterial.id;
UsedMaterials[activeMaterial.id] = activeMaterial.name;
}
t.nGroupID = nActiveGroup;
vTriangles.Add(t);
if (t.is_complex())
{
HasComplexVertices = true;
}
}
}
}
public IOReadResult ParseInput(TextReader reader, ReadOptions options)
{
vPositions = new DVector <double>();
vNormals = new DVector <float>();
vUVs = new DVector <float>();
vColors = new DVector <float>();
vTriangles = new DVector <Triangle>();
bool bVerticesHaveColors = false;
int nMaxUVLength = 0;
OBJMaterial activeMaterial = null;
Dictionary <string, int> GroupNames = new Dictionary <string, int>();
int nGroupCounter = 0;
int nActiveGroup = Triangle.InvalidGroupID;
int nLines = 0;
while (reader.Peek() >= 0)
{
string line = reader.ReadLine();
nLines++;
string[] tokens = line.Split((char[])null, StringSplitOptions.RemoveEmptyEntries);
if (tokens.Length == 0)
{
continue;
}
// [RMS] this will hang VS on large models...
//if (nWarningLevel >= 2)
// emit_warning("Parsing line " + line);
try {
if (tokens[0][0] == 'v')
{
if (tokens[0].Length == 1)
{
if (tokens.Length == 7)
{
vPositions.Add(Double.Parse(tokens[1]));
vPositions.Add(Double.Parse(tokens[2]));
vPositions.Add(Double.Parse(tokens[3]));
vColors.Add(float.Parse(tokens[4]));
vColors.Add(float.Parse(tokens[5]));
vColors.Add(float.Parse(tokens[6]));
bVerticesHaveColors = true;
}
else if (tokens.Length >= 4)
{
vPositions.Add(Double.Parse(tokens[1]));
vPositions.Add(Double.Parse(tokens[2]));
vPositions.Add(Double.Parse(tokens[3]));
}
if (tokens.Length != 4 && tokens.Length != 7)
{
emit_warning("[OBJReader] vertex has unknown format: " + line);
}
}
else if (tokens[0][1] == 'n')
{
if (tokens.Length >= 4)
{
vNormals.Add(float.Parse(tokens[1]));
vNormals.Add(float.Parse(tokens[2]));
vNormals.Add(float.Parse(tokens[3]));
}
if (tokens.Length != 4)
{
emit_warning("[OBJReader] normal has more than 3 coordinates: " + line);
}
}
else if (tokens[0][1] == 't')
{
if (tokens.Length >= 3)
{
vUVs.Add(float.Parse(tokens[1]));
vUVs.Add(float.Parse(tokens[2]));
nMaxUVLength = Math.Max(nMaxUVLength, tokens.Length);
}
if (tokens.Length != 3)
{
emit_warning("[OBJReader] UV has unknown format: " + line);
}
}
}
else if (tokens[0][0] == 'f')
{
if (tokens.Length < 4)
{
emit_warning("[OBJReader] degenerate face specified : " + line);
}
else if (tokens.Length == 4)
{
Triangle tri = new Triangle();
parse_triangle(tokens, ref tri);
tri.nGroupID = nActiveGroup;
if (activeMaterial != null)
{
tri.nMaterialID = activeMaterial.id;
UsedMaterials[activeMaterial.id] = activeMaterial.name;
}
vTriangles.Add(tri);
if (tri.is_complex())
{
HasComplexVertices = true;
}
}
else
{
append_face(tokens, activeMaterial, nActiveGroup);
}
}
else if (tokens[0][0] == 'g')
{
string sGroupName = (tokens.Length == 2) ? tokens[1] : line.Substring(line.IndexOf(tokens[1]));
if (GroupNames.ContainsKey(sGroupName))
{
nActiveGroup = GroupNames[sGroupName];
}
else
{
nActiveGroup = nGroupCounter;
GroupNames[sGroupName] = nGroupCounter++;
}
}
else if (tokens[0][0] == 'o')
{
// TODO multi-object support
}
else if (tokens[0] == "mtllib" && options.ReadMaterials)
{
if (MTLFileSearchPaths.Count == 0)
{
emit_warning("Materials requested but Material Search Paths not initialized!");
}
string sMTLPathString = (tokens.Length == 2) ? tokens[1] :
line.Substring(line.IndexOf(tokens[1]));
string sFile = FindMTLFile(sMTLPathString);
if (sFile != null)
{
IOReadResult result = ReadMaterials(sFile);
if (result.code != IOCode.Ok)
{
emit_warning("error parsing " + sFile + " : " + result.message);
}
}
else
{
emit_warning("material file " + sMTLPathString + " could not be found in material search paths");
}
}
else if (tokens[0] == "usemtl" && options.ReadMaterials)
{
activeMaterial = find_material(tokens[1]);
}
} catch (Exception e) {
emit_warning("error parsing line " + nLines.ToString() + ": " + line + ", exception " + e.Message);
}
}
m_bOBJHasPerVertexColors = bVerticesHaveColors;
m_bOBJHasTriangleGroups = (nActiveGroup != Triangle.InvalidGroupID);
m_nSetInvalidGroupsTo = nGroupCounter++;
m_nUVComponents = nMaxUVLength;
return(new IOReadResult(IOCode.Ok, ""));
}
unsafe IOReadResult BuildMeshes_ByMaterial(ReadOptions options, IMeshBuilder builder)
{
if (vPositions.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No vertices in file"));
}
if (vTriangles.Length == 0)
{
return(new IOReadResult(IOCode.GarbageDataError, "No triangles in file"));
}
bool bHaveNormals = (vNormals.Length > 0);
bool bHaveColors = (vColors.Length > 0);
bool bHaveUVs = (vUVs.Length > 0);
List <int> usedMaterialIDs = new List <int>(UsedMaterials.Keys);
usedMaterialIDs.Add(Triangle.InvalidMaterialID);
foreach (int material_id in usedMaterialIDs)
{
int matID = Triangle.InvalidMaterialID;
if (material_id != Triangle.InvalidMaterialID)
{
string sMatName = UsedMaterials[material_id];
OBJMaterial useMat = Materials[sMatName];
matID = builder.BuildMaterial(useMat);
}
bool bMatHaveUVs = (material_id == Triangle.InvalidMaterialID) ? false : bHaveUVs;
// don't append mesh until we actually see triangles
int meshID = -1;
Dictionary <Index3i, int> mapV = new Dictionary <Index3i, int>();
for (int k = 0; k < vTriangles.Length; ++k)
{
Triangle t = vTriangles[k];
if (t.nMaterialID == material_id)
{
if (meshID == -1)
{
meshID = builder.AppendNewMesh(bHaveNormals, bHaveColors, bMatHaveUVs, false);
}
Triangle t2 = new Triangle();
for (int j = 0; j < 3; ++j)
{
Index3i vk = new Index3i(
t.vIndices[j] - 1, t.vNormals[j] - 1, t.vUVs[j] - 1);
int use_vtx = -1;
if (mapV.ContainsKey(vk) == false)
{
use_vtx = append_vertex(builder, vk, bHaveNormals, bHaveColors, bMatHaveUVs);
mapV[vk] = use_vtx;
}
else
{
use_vtx = mapV[vk];
}
t2.vIndices[j] = use_vtx;
}
append_triangle(builder, t2);
}
}
if (matID != Triangle.InvalidMaterialID)
{
builder.AssignMaterial(matID, meshID);
}
}
return(new IOReadResult(IOCode.Ok, ""));
}
// write .mtl file
IOWriteResult write_materials(List <GenericMaterial> vMaterials, WriteOptions options)
{
StreamWriter w = new StreamWriter(options.MaterialFilePath);
if (w.BaseStream == null)
{
return(new IOWriteResult(IOCode.FileAccessError, "Could not open file " + options.MaterialFilePath + " for writing"));
}
foreach (GenericMaterial gmat in vMaterials)
{
if (gmat is OBJMaterial == false)
{
continue;
}
OBJMaterial mat = gmat as OBJMaterial;
w.WriteLine("newmtl {0}", mat.name);
if (mat.Ka != GenericMaterial.Invalid)
{
w.WriteLine("Ka {0} {1} {2}", mat.Ka.x, mat.Ka.y, mat.Ka.z);
}
if (mat.Kd != GenericMaterial.Invalid)
{
w.WriteLine("Kd {0} {1} {2}", mat.Kd.x, mat.Kd.y, mat.Kd.z);
}
if (mat.Ks != GenericMaterial.Invalid)
{
w.WriteLine("Ks {0} {1} {2}", mat.Ks.x, mat.Ks.y, mat.Ks.z);
}
if (mat.Ke != GenericMaterial.Invalid)
{
w.WriteLine("Ke {0} {1} {2}", mat.Ke.x, mat.Ke.y, mat.Ke.z);
}
if (mat.Tf != GenericMaterial.Invalid)
{
w.WriteLine("Tf {0} {1} {2}", mat.Tf.x, mat.Tf.y, mat.Tf.z);
}
if (mat.d != Single.MinValue)
{
w.WriteLine("d {0}", mat.d);
}
if (mat.Ns != Single.MinValue)
{
w.WriteLine("Ns {0}", mat.Ns);
}
if (mat.Ni != Single.MinValue)
{
w.WriteLine("Ni {0}", mat.Ni);
}
if (mat.sharpness != Single.MinValue)
{
w.WriteLine("sharpness {0}", mat.sharpness);
}
if (mat.illum != -1)
{
w.WriteLine("illum {0}", mat.illum);
}
if (mat.map_Ka != null && mat.map_Ka != "")
{
w.WriteLine("map_Ka {0}", mat.map_Ka);
}
if (mat.map_Kd != null && mat.map_Kd != "")
{
w.WriteLine("map_Kd {0}", mat.map_Kd);
}
if (mat.map_Ks != null && mat.map_Ks != "")
{
w.WriteLine("map_Ks {0}", mat.map_Ks);
}
if (mat.map_Ke != null && mat.map_Ke != "")
{
w.WriteLine("map_Ke {0}", mat.map_Ke);
}
if (mat.map_d != null && mat.map_d != "")
{
w.WriteLine("map_d {0}", mat.map_d);
}
if (mat.map_Ns != null && mat.map_Ns != "")
{
w.WriteLine("map_Ns {0}", mat.map_Ns);
}
if (mat.bump != null && mat.bump != "")
{
w.WriteLine("bump {0}", mat.bump);
}
if (mat.disp != null && mat.disp != "")
{
w.WriteLine("disp {0}", mat.disp);
}
if (mat.decal != null && mat.decal != "")
{
w.WriteLine("decal {0}", mat.decal);
}
if (mat.refl != null && mat.refl != "")
{
w.WriteLine("refl {0}", mat.refl);
}
}
w.Close();
return(IOWriteResult.Ok);
}