diff --git a/include/OBJLoader.h b/include/OBJLoader.h deleted file mode 100644 index fce5133..0000000 --- a/include/OBJLoader.h +++ /dev/null @@ -1,1292 +0,0 @@ -// OBJ_Loader.h - A Single Header OBJ Model Loader - -#pragma once - -// Iostream - STD I/O Library -#include - -// Vector - STD Vector/Array Library -#include - -// String - STD String Library -#include - -// fStream - STD File I/O Library -#include - -// Math.h - STD math Library -#include - -// Print progress to console while loading (large models) -#define OBJL_CONSOLE_OUTPUT - -// Namespace: OBJL -// -// Description: The namespace that holds eveyrthing that -// is needed and used for the OBJ Model Loader -namespace objl -{ - // Structure: Vector2 - // - // Description: A 2D Vector that Holds Positional Data - struct Vector2 - { - // Default Constructor - Vector2(); - // Variable Set Constructor - Vector2(float X_, float Y_); - // Bool Equals Operator Overload - bool operator==(const Vector2& other) const - { - return (this->X == other.X && this->Y == other.Y); - } - // Bool Not Equals Operator Overload - bool operator!=(const Vector2& other) const - { - return !(this->X == other.X && this->Y == other.Y); - } - // Addition Operator Overload - Vector2 operator+(const Vector2& right) const - { - return Vector2(this->X + right.X, this->Y + right.Y); - } - // Subtraction Operator Overload - Vector2 operator-(const Vector2& right) const - { - return Vector2(this->X - right.X, this->Y - right.Y); - } - // Float Multiplication Operator Overload - Vector2 operator*(const float& other) const - { - return Vector2(this->X *other, this->Y * other); - } - - // Positional Variables - float X; - float Y; - }; - - // Structure: Vector3 - // - // Description: A 3D Vector that Holds Positional Data - struct Vector3 - { - // Default Constructor - Vector3(); - // Variable Set Constructor - Vector3(float X_, float Y_, float Z_); - // Bool Equals Operator Overload - bool operator==(const Vector3& other) const - { - return (this->X == other.X && this->Y == other.Y && this->Z == other.Z); - } - // Bool Not Equals Operator Overload - bool operator!=(const Vector3& other) const - { - return !(this->X == other.X && this->Y == other.Y && this->Z == other.Z); - } - // Addition Operator Overload - Vector3 operator+(const Vector3& right) const - { - return Vector3(this->X + right.X, this->Y + right.Y, this->Z + right.Z); - } - // Subtraction Operator Overload - Vector3 operator-(const Vector3& right) const - { - return Vector3(this->X - right.X, this->Y - right.Y, this->Z - right.Z); - } - // Float Multiplication Operator Overload - Vector3 operator*(const float& other) const - { - return Vector3(this->X * other, this->Y * other, this->Z * other); - } - // Float Division Operator Overload - Vector3 operator/(const float& other) const - { - return Vector3(this->X / other, this->Y / other, this->Z / other); - } - - // Positional Variables - float X; - float Y; - float Z; - }; - - // Structure: Vertex - // - // Description: Model Vertex object that holds - // a Position, Normal, and Texture Coordinate - struct Vertex - { - // Position Vector - Vector3 Position; - - // Normal Vector - Vector3 Normal; - - // Texture Coordinate Vector - Vector2 TextureCoordinate; - }; - - struct Material - { - Material(); - - // Material Name - std::string name; - // Ambient Color - Vector3 Ka; - // Diffuse Color - Vector3 Kd; - // Specular Color - Vector3 Ks; - // Specular Exponent - float Ns; - // Optical Density - float Ni; - // Dissolve - float d; - // Illumination - int illum; - // Ambient Texture Map - std::string map_Ka; - // Diffuse Texture Map - std::string map_Kd; - // Specular Texture Map - std::string map_Ks; - // Specular Hightlight Map - std::string map_Ns; - // Alpha Texture Map - std::string map_d; - // Bump Map - std::string map_bump; - }; - - // Structure: Mesh - // - // Description: A Simple Mesh Object that holds - // a name, a vertex list, and an index list - struct Mesh - { - // Default Constructor - Mesh(); - // Variable Set Constructor - Mesh(std::vector& _Vertices, std::vector& _Indices); - // Mesh Name - std::string MeshName; - // Vertex List - std::vector Vertices; - // Index List - std::vector Indices; - - // Material - Material MeshMaterial; - }; - - // Namespace: Math - // - // Description: The namespace that holds all of the math - // functions need for OBJL - namespace math - { - // Vector3 Cross Product - Vector3 CrossV3(const Vector3 a, const Vector3 b); - - // Vector3 Magnitude Calculation - float MagnitudeV3(const Vector3 in); - - // Vector3 DotProduct - float DotV3(const Vector3 a, const Vector3 b); - - // Angle between 2 Vector3 Objects - float AngleBetweenV3(const Vector3 a, const Vector3 b); - - // Projection Calculation of a onto b - Vector3 ProjV3(const Vector3 a, const Vector3 b); - } - - // Namespace: Algorithm - // - // Description: The namespace that holds all of the - // Algorithms needed for OBJL - namespace algorithm - { - // Vector3 Multiplication Opertor Overload - Vector3 operator*(const float& left, const Vector3& right); - - // A test to see if P1 is on the same side as P2 of a line segment ab - bool SameSide(Vector3 p1, Vector3 p2, Vector3 a, Vector3 b); - - // Generate a cross produect normal for a triangle - Vector3 GenTriNormal(Vector3 t1, Vector3 t2, Vector3 t3); - - // Check to see if a Vector3 Point is within a 3 Vector3 Triangle - bool inTriangle(Vector3 point, Vector3 tri1, Vector3 tri2, Vector3 tri3); - - // Split a String into a string array at a given token - inline void split(const std::string &in, - std::vector &out, - std::string token); - - // Get tail of string after first token and possibly following spaces - inline std::string tail(const std::string &in); - - // Get first token of string - inline std::string firstToken(const std::string &in); - - // Get element at given index position - template - inline const T & getElement(const std::vector &elements, std::string &index) - { - int idx = std::stoi(index); - if (idx < 0) - idx = int(elements.size()) + idx; - else - idx--; - return elements[idx]; - } - } - - // Class: Loader - // - // Description: The OBJ Model Loader - class Loader - { - public: - // Default Constructor - Loader(); - ~Loader(); - - // Load a file into the loader - // - // If file is loaded return true - // - // If the file is unable to be found - // or unable to be loaded return false - bool LoadFile(std::string Path); - // Loaded Mesh Objects - std::vector LoadedMeshes; - // Loaded Vertex Objects - std::vector LoadedVertices; - // Loaded Index Positions - std::vector LoadedIndices; - // Loaded Material Objects - std::vector LoadedMaterials; - - private: - // Generate vertices from a list of positions, - // tcoords, normals and a face line - void GenVerticesFromRawOBJ(std::vector& oVerts, - const std::vector& iPositions, - const std::vector& iTCoords, - const std::vector& iNormals, - std::string icurline); - - // Triangulate a list of vertices into a face by printing - // inducies corresponding with triangles within it - void VertexTriangluation(std::vector& oIndices, - const std::vector& iVerts); - - // Load Materials from .mtl file - bool LoadMaterials(std::string path); - }; -} - - - -#ifdef OBJL_IMPLIMENTATION -#undef OBJL_IMPLIMENTATION - - - -namespace objl -{ - // Structure: Vector2 - // - // Description: A 2D Vector that Holds Positional Data - // Default Constructor - Vector2::Vector2() - { - X = 0.0f; - Y = 0.0f; - } - // Variable Set Constructor - Vector2::Vector2(float X_, float Y_) - { - X = X_; - Y = Y_; - } - - - // Structure: Vector3 - // - // Description: A 3D Vector that Holds Positional Data - // Default Constructor - Vector3::Vector3() - { - X = 0.0f; - Y = 0.0f; - Z = 0.0f; - } - // Variable Set Constructor - Vector3::Vector3(float X_, float Y_, float Z_) - { - X = X_; - Y = Y_; - Z = Z_; - } - - - - Material::Material() - { - name; - Ns = 0.0f; - Ni = 0.0f; - d = 0.0f; - illum = 0; - } - - // Structure: Mesh - // - // Description: A Simple Mesh Object that holds - // a name, a vertex list, and an index list - // Default Constructor - Mesh::Mesh() - { - - } - // Variable Set Constructor - Mesh::Mesh(std::vector& _Vertices, std::vector& _Indices) - { - Vertices = _Vertices; - Indices = _Indices; - } - - // Namespace: Math - // - // Description: The namespace that holds all of the math - // functions need for OBJL - namespace math - { - // Vector3 Cross Product - Vector3 CrossV3(const Vector3 a, const Vector3 b) - { - return Vector3(a.Y * b.Z - a.Z * b.Y, - a.Z * b.X - a.X * b.Z, - a.X * b.Y - a.Y * b.X); - } - - // Vector3 Magnitude Calculation - float MagnitudeV3(const Vector3 in) - { - return (sqrtf(powf(in.X, 2) + powf(in.Y, 2) + powf(in.Z, 2))); - } - - // Vector3 DotProduct - float DotV3(const Vector3 a, const Vector3 b) - { - return (a.X * b.X) + (a.Y * b.Y) + (a.Z * b.Z); - } - - // Angle between 2 Vector3 Objects - float AngleBetweenV3(const Vector3 a, const Vector3 b) - { - float angle = DotV3(a, b); - angle /= (MagnitudeV3(a) * MagnitudeV3(b)); - return angle = acosf(angle); - } - - // Projection Calculation of a onto b - Vector3 ProjV3(const Vector3 a, const Vector3 b) - { - Vector3 bn = b / MagnitudeV3(b); - return bn * DotV3(a, bn); - } - } - - // Namespace: Algorithm - // - // Description: The namespace that holds all of the - // Algorithms needed for OBJL - namespace algorithm - { - // Vector3 Multiplication Opertor Overload - Vector3 operator*(const float& left, const Vector3& right) - { - return Vector3(right.X * left, right.Y * left, right.Z * left); - } - - // A test to see if P1 is on the same side as P2 of a line segment ab - bool SameSide(Vector3 p1, Vector3 p2, Vector3 a, Vector3 b) - { - Vector3 cp1 = math::CrossV3(b - a, p1 - a); - Vector3 cp2 = math::CrossV3(b - a, p2 - a); - - if (math::DotV3(cp1, cp2) >= 0) - return true; - else - return false; - } - - // Generate a cross produect normal for a triangle - Vector3 GenTriNormal(Vector3 t1, Vector3 t2, Vector3 t3) - { - Vector3 u = t2 - t1; - Vector3 v = t3 - t1; - - Vector3 normal = math::CrossV3(u,v); - - return normal; - } - - // Check to see if a Vector3 Point is within a 3 Vector3 Triangle - bool inTriangle(Vector3 point, Vector3 tri1, Vector3 tri2, Vector3 tri3) - { - // Test to see if it is within an infinite prism that the triangle outlines. - bool within_tri_prisim = SameSide(point, tri1, tri2, tri3) && SameSide(point, tri2, tri1, tri3) - && SameSide(point, tri3, tri1, tri2); - - // If it isn't it will never be on the triangle - if (!within_tri_prisim) - return false; - - // Calulate Triangle's Normal - Vector3 n = GenTriNormal(tri1, tri2, tri3); - - // Project the point onto this normal - Vector3 proj = math::ProjV3(point, n); - - // If the distance from the triangle to the point is 0 - // it lies on the triangle - if (math::MagnitudeV3(proj) == 0) - return true; - else - return false; - } - - // Split a String into a string array at a given token - inline void split(const std::string &in, - std::vector &out, - std::string token) - { - out.clear(); - - std::string temp; - - for (int i = 0; i < int(in.size()); i++) - { - std::string test = in.substr(i, token.size()); - - if (test == token) - { - if (!temp.empty()) - { - out.push_back(temp); - temp.clear(); - i += (int)token.size() - 1; - } - else - { - out.push_back(""); - } - } - else if (i + token.size() >= in.size()) - { - temp += in.substr(i, token.size()); - out.push_back(temp); - break; - } - else - { - temp += in[i]; - } - } - } - - // Get tail of string after first token and possibly following spaces - inline std::string tail(const std::string &in) - { - size_t token_start = in.find_first_not_of(" \t"); - size_t space_start = in.find_first_of(" \t", token_start); - size_t tail_start = in.find_first_not_of(" \t", space_start); - size_t tail_end = in.find_last_not_of(" \t"); - if (tail_start != std::string::npos && tail_end != std::string::npos) - { - return in.substr(tail_start, tail_end - tail_start + 1); - } - else if (tail_start != std::string::npos) - { - return in.substr(tail_start); - } - return ""; - } - - // Get first token of string - inline std::string firstToken(const std::string &in) - { - if (!in.empty()) - { - size_t token_start = in.find_first_not_of(" \t"); - size_t token_end = in.find_first_of(" \t", token_start); - if (token_start != std::string::npos && token_end != std::string::npos) - { - return in.substr(token_start, token_end - token_start); - } - else if (token_start != std::string::npos) - { - return in.substr(token_start); - } - } - return ""; - } - - } - - // Class: Loader - // - // Description: The OBJ Model Loader - // Default Constructor - objl::Loader::Loader() - { - - } - objl::Loader::~Loader() - { - LoadedMeshes.clear(); - } - - // Load a file into the loader - // - // If file is loaded return true - // - // If the file is unable to be found - // or unable to be loaded return false - bool objl::Loader::LoadFile(std::string Path) - { - // If the file is not an .obj file return false - if (Path.substr(Path.size() - 4, 4) != ".obj") - return false; - - - std::ifstream file(Path); - - if (!file.is_open()) - return false; - - LoadedMeshes.clear(); - LoadedVertices.clear(); - LoadedIndices.clear(); - - std::vector Positions; - std::vector TCoords; - std::vector Normals; - - std::vector Vertices; - std::vector Indices; - - std::vector MeshMatNames; - - bool listening = false; - std::string meshname; - - objl::Mesh tempMesh; - - #ifdef OBJL_CONSOLE_OUTPUT - const unsigned int outputEveryNth = 1000; - unsigned int outputIndicator = outputEveryNth; - #endif - - std::string curline; - while (std::getline(file, curline)) - { - #ifdef OBJL_CONSOLE_OUTPUT - if ((outputIndicator = ((outputIndicator + 1) % outputEveryNth)) == 1) - { - if (!meshname.empty()) - { - std::cout - << "\r- " << meshname - << "\t| vertices > " << Positions.size() - << "\t| texcoords > " << TCoords.size() - << "\t| normals > " << Normals.size() - << "\t| triangles > " << (Vertices.size() / 3) - << (!MeshMatNames.empty() ? "\t| material: " + MeshMatNames.back() : ""); - } - } - #endif - - // Generate a Mesh Object or Prepare for an object to be created - if (algorithm::firstToken(curline) == "o" || algorithm::firstToken(curline) == "g" || curline[0] == 'g') - { - if (!listening) - { - listening = true; - - if (algorithm::firstToken(curline) == "o" || algorithm::firstToken(curline) == "g") - { - meshname = algorithm::tail(curline); - } - else - { - meshname = "unnamed"; - } - } - else - { - // Generate the mesh to put into the array - - if (!Indices.empty() && !Vertices.empty()) - { - // Create Mesh - tempMesh = Mesh(Vertices, Indices); - tempMesh.MeshName = meshname; - - // Insert Mesh - LoadedMeshes.push_back(tempMesh); - - // Cleanup - Vertices.clear(); - Indices.clear(); - meshname.clear(); - - meshname = algorithm::tail(curline); - } - else - { - if (algorithm::firstToken(curline) == "o" || algorithm::firstToken(curline) == "g") - { - meshname = algorithm::tail(curline); - } - else - { - meshname = "unnamed"; - } - } - } - #ifdef OBJL_CONSOLE_OUTPUT - std::cout << std::endl; - outputIndicator = 0; - #endif - } - // Generate a Vertex Position - if (algorithm::firstToken(curline) == "v") - { - std::vector spos; - Vector3 vpos; - algorithm::split(algorithm::tail(curline), spos, " "); - - vpos.X = std::stof(spos[0]); - vpos.Y = std::stof(spos[1]); - vpos.Z = std::stof(spos[2]); - - Positions.push_back(vpos); - } - // Generate a Vertex Texture Coordinate - if (algorithm::firstToken(curline) == "vt") - { - std::vector stex; - Vector2 vtex; - algorithm::split(algorithm::tail(curline), stex, " "); - - vtex.X = std::stof(stex[0]); - vtex.Y = std::stof(stex[1]); - - TCoords.push_back(vtex); - } - // Generate a Vertex Normal; - if (algorithm::firstToken(curline) == "vn") - { - std::vector snor; - Vector3 vnor; - algorithm::split(algorithm::tail(curline), snor, " "); - - vnor.X = std::stof(snor[0]); - vnor.Y = std::stof(snor[1]); - vnor.Z = std::stof(snor[2]); - - Normals.push_back(vnor); - } - // Generate a Face (vertices & indices) - if (algorithm::firstToken(curline) == "f") - { - // Generate the vertices - std::vector vVerts; - GenVerticesFromRawOBJ(vVerts, Positions, TCoords, Normals, curline); - - // Add Vertices - for (int i = 0; i < int(vVerts.size()); i++) - { - Vertices.push_back(vVerts[i]); - - LoadedVertices.push_back(vVerts[i]); - } - - std::vector iIndices; - - VertexTriangluation(iIndices, vVerts); - - // Add Indices - for (int i = 0; i < int(iIndices.size()); i++) - { - unsigned int indnum = (unsigned int)((Vertices.size()) - vVerts.size()) + iIndices[i]; - Indices.push_back(indnum); - - indnum = (unsigned int)((LoadedVertices.size()) - vVerts.size()) + iIndices[i]; - LoadedIndices.push_back(indnum); - - } - } - // Get Mesh Material Name - if (algorithm::firstToken(curline) == "usemtl") - { - MeshMatNames.push_back(algorithm::tail(curline)); - - // Create new Mesh, if Material changes within a group - if (!Indices.empty() && !Vertices.empty()) - { - // Create Mesh - tempMesh = Mesh(Vertices, Indices); - tempMesh.MeshName = meshname; - int i = 2; - while(1) { - tempMesh.MeshName = meshname + "_" + std::to_string(i); - - for (auto &m : LoadedMeshes) - if (m.MeshName == tempMesh.MeshName) - continue; - break; - } - - // Insert Mesh - LoadedMeshes.push_back(tempMesh); - - // Cleanup - Vertices.clear(); - Indices.clear(); - } - - #ifdef OBJL_CONSOLE_OUTPUT - outputIndicator = 0; - #endif - } - // Load Materials - if (algorithm::firstToken(curline) == "mtllib") - { - // Generate LoadedMaterial - - // Generate a path to the material file - std::vector temp; - algorithm::split(Path, temp, "/"); - - std::string pathtomat = ""; - - if (temp.size() != 1) - { - for (int i = 0; i < temp.size() - 1; i++) - { - pathtomat += temp[i] + "/"; - } - } - - - pathtomat += algorithm::tail(curline); - - #ifdef OBJL_CONSOLE_OUTPUT - std::cout << std::endl << "- find materials in: " << pathtomat << std::endl; - #endif - - // Load Materials - LoadMaterials(pathtomat); - } - } - - #ifdef OBJL_CONSOLE_OUTPUT - std::cout << std::endl; - #endif - - // Deal with last mesh - - if (!Indices.empty() && !Vertices.empty()) - { - // Create Mesh - tempMesh = Mesh(Vertices, Indices); - tempMesh.MeshName = meshname; - - // Insert Mesh - LoadedMeshes.push_back(tempMesh); - } - - file.close(); - - // Set Materials for each Mesh - for (int i = 0; i < MeshMatNames.size(); i++) - { - std::string matname = MeshMatNames[i]; - - // Find corresponding material name in loaded materials - // when found copy material variables into mesh material - for (int j = 0; j < LoadedMaterials.size(); j++) - { - if (LoadedMaterials[j].name == matname) - { - LoadedMeshes[i].MeshMaterial = LoadedMaterials[j]; - break; - } - } - } - - if (LoadedMeshes.empty() && LoadedVertices.empty() && LoadedIndices.empty()) - { - return false; - } - else - { - return true; - } - } - - // Generate vertices from a list of positions, - // tcoords, normals and a face line - void Loader::GenVerticesFromRawOBJ(std::vector& oVerts, - const std::vector& iPositions, - const std::vector& iTCoords, - const std::vector& iNormals, - std::string icurline) - { - std::vector sface, svert; - Vertex vVert; - algorithm::split(algorithm::tail(icurline), sface, " "); - - bool noNormal = false; - - // For every given vertex do this - for (int i = 0; i < int(sface.size()); i++) - { - // See What type the vertex is. - int vtype; - - algorithm::split(sface[i], svert, "/"); - - // Check for just position - v1 - if (svert.size() == 1) - { - // Only position - vtype = 1; - } - - // Check for position & texture - v1/vt1 - if (svert.size() == 2) - { - // Position & Texture - vtype = 2; - } - - // Check for Position, Texture and Normal - v1/vt1/vn1 - // or if Position and Normal - v1//vn1 - if (svert.size() == 3) - { - if (svert[1] != "") - { - // Position, Texture, and Normal - vtype = 4; - } - else - { - // Position & Normal - vtype = 3; - } - } - - // Calculate and store the vertex - switch (vtype) - { - case 1: // P - { - vVert.Position = algorithm::getElement(iPositions, svert[0]); - vVert.TextureCoordinate = Vector2(0, 0); - noNormal = true; - oVerts.push_back(vVert); - break; - } - case 2: // P/T - { - vVert.Position = algorithm::getElement(iPositions, svert[0]); - vVert.TextureCoordinate = algorithm::getElement(iTCoords, svert[1]); - noNormal = true; - oVerts.push_back(vVert); - break; - } - case 3: // P//N - { - vVert.Position = algorithm::getElement(iPositions, svert[0]); - vVert.TextureCoordinate = Vector2(0, 0); - vVert.Normal = algorithm::getElement(iNormals, svert[2]); - oVerts.push_back(vVert); - break; - } - case 4: // P/T/N - { - vVert.Position = algorithm::getElement(iPositions, svert[0]); - vVert.TextureCoordinate = algorithm::getElement(iTCoords, svert[1]); - vVert.Normal = algorithm::getElement(iNormals, svert[2]); - oVerts.push_back(vVert); - break; - } - default: - { - break; - } - } - } - - // take care of missing normals - // these may not be truly acurate but it is the - // best they get for not compiling a mesh with normals - if (noNormal) - { - Vector3 A = oVerts[0].Position - oVerts[1].Position; - Vector3 B = oVerts[2].Position - oVerts[1].Position; - - Vector3 normal = math::CrossV3(A, B); - - for (int i = 0; i < int(oVerts.size()); i++) - { - oVerts[i].Normal = normal; - } - } - } - - // Triangulate a list of vertices into a face by printing - // inducies corresponding with triangles within it - void Loader::VertexTriangluation(std::vector& oIndices, - const std::vector& iVerts) - { - // If there are 2 or less verts, - // no triangle can be created, - // so exit - if (iVerts.size() < 3) - { - return; - } - // If it is a triangle no need to calculate it - if (iVerts.size() == 3) - { - oIndices.push_back(0); - oIndices.push_back(1); - oIndices.push_back(2); - return; - } - - // Create a list of vertices - std::vector tVerts = iVerts; - - while (true) - { - // For every vertex - for (int i = 0; i < int(tVerts.size()); i++) - { - // pPrev = the previous vertex in the list - Vertex pPrev; - if (i == 0) - { - pPrev = tVerts[tVerts.size() - 1]; - } - else - { - pPrev = tVerts[i - 1]; - } - - // pCur = the current vertex; - Vertex pCur = tVerts[i]; - - // pNext = the next vertex in the list - Vertex pNext; - if (i == tVerts.size() - 1) - { - pNext = tVerts[0]; - } - else - { - pNext = tVerts[i + 1]; - } - - // Check to see if there are only 3 verts left - // if so this is the last triangle - if (tVerts.size() == 3) - { - // Create a triangle from pCur, pPrev, pNext - for (int j = 0; j < int(tVerts.size()); j++) - { - if (iVerts[j].Position == pCur.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pPrev.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pNext.Position) - oIndices.push_back(j); - } - - tVerts.clear(); - break; - } - if (tVerts.size() == 4) - { - // Create a triangle from pCur, pPrev, pNext - for (int j = 0; j < int(iVerts.size()); j++) - { - if (iVerts[j].Position == pCur.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pPrev.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pNext.Position) - oIndices.push_back(j); - } - - Vector3 tempVec; - for (int j = 0; j < int(tVerts.size()); j++) - { - if (tVerts[j].Position != pCur.Position - && tVerts[j].Position != pPrev.Position - && tVerts[j].Position != pNext.Position) - { - tempVec = tVerts[j].Position; - break; - } - } - - // Create a triangle from pCur, pPrev, pNext - for (int j = 0; j < int(iVerts.size()); j++) - { - if (iVerts[j].Position == pPrev.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pNext.Position) - oIndices.push_back(j); - if (iVerts[j].Position == tempVec) - oIndices.push_back(j); - } - - tVerts.clear(); - break; - } - - // If Vertex is not an interior vertex - float angle = math::AngleBetweenV3(pPrev.Position - pCur.Position, pNext.Position - pCur.Position) * (180 / 3.14159265359); - if (angle <= 0 && angle >= 180) - continue; - - // If any vertices are within this triangle - bool inTri = false; - for (int j = 0; j < int(iVerts.size()); j++) - { - if (algorithm::inTriangle(iVerts[j].Position, pPrev.Position, pCur.Position, pNext.Position) - && iVerts[j].Position != pPrev.Position - && iVerts[j].Position != pCur.Position - && iVerts[j].Position != pNext.Position) - { - inTri = true; - break; - } - } - if (inTri) - continue; - - // Create a triangle from pCur, pPrev, pNext - for (int j = 0; j < int(iVerts.size()); j++) - { - if (iVerts[j].Position == pCur.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pPrev.Position) - oIndices.push_back(j); - if (iVerts[j].Position == pNext.Position) - oIndices.push_back(j); - } - - // Delete pCur from the list - for (int j = 0; j < int(tVerts.size()); j++) - { - if (tVerts[j].Position == pCur.Position) - { - tVerts.erase(tVerts.begin() + j); - break; - } - } - - // reset i to the start - // -1 since loop will add 1 to it - i = -1; - } - - // if no triangles were created - if (oIndices.size() == 0) - break; - - // if no more vertices - if (tVerts.size() == 0) - break; - } - } - - // Load Materials from .mtl file - bool Loader::LoadMaterials(std::string path) - { - // If the file is not a material file return false - if (path.substr(path.size() - 4, path.size()) != ".mtl") - return false; - - std::ifstream file(path); - - // If the file is not found return false - if (!file.is_open()) - return false; - - Material tempMaterial; - - bool listening = false; - - // Go through each line looking for material variables - std::string curline; - while (std::getline(file, curline)) - { - // new material and material name - if (algorithm::firstToken(curline) == "newmtl") - { - if (!listening) - { - listening = true; - - if (curline.size() > 7) - { - tempMaterial.name = algorithm::tail(curline); - } - else - { - tempMaterial.name = "none"; - } - } - else - { - // Generate the material - - // Push Back loaded Material - LoadedMaterials.push_back(tempMaterial); - - // Clear Loaded Material - tempMaterial = Material(); - - if (curline.size() > 7) - { - tempMaterial.name = algorithm::tail(curline); - } - else - { - tempMaterial.name = "none"; - } - } - } - // Ambient Color - if (algorithm::firstToken(curline) == "Ka") - { - std::vector temp; - algorithm::split(algorithm::tail(curline), temp, " "); - - if (temp.size() != 3) - continue; - - tempMaterial.Ka.X = std::stof(temp[0]); - tempMaterial.Ka.Y = std::stof(temp[1]); - tempMaterial.Ka.Z = std::stof(temp[2]); - } - // Diffuse Color - if (algorithm::firstToken(curline) == "Kd") - { - std::vector temp; - algorithm::split(algorithm::tail(curline), temp, " "); - - if (temp.size() != 3) - continue; - - tempMaterial.Kd.X = std::stof(temp[0]); - tempMaterial.Kd.Y = std::stof(temp[1]); - tempMaterial.Kd.Z = std::stof(temp[2]); - } - // Specular Color - if (algorithm::firstToken(curline) == "Ks") - { - std::vector temp; - algorithm::split(algorithm::tail(curline), temp, " "); - - if (temp.size() != 3) - continue; - - tempMaterial.Ks.X = std::stof(temp[0]); - tempMaterial.Ks.Y = std::stof(temp[1]); - tempMaterial.Ks.Z = std::stof(temp[2]); - } - // Specular Exponent - if (algorithm::firstToken(curline) == "Ns") - { - tempMaterial.Ns = std::stof(algorithm::tail(curline)); - } - // Optical Density - if (algorithm::firstToken(curline) == "Ni") - { - tempMaterial.Ni = std::stof(algorithm::tail(curline)); - } - // Dissolve - if (algorithm::firstToken(curline) == "d") - { - tempMaterial.d = std::stof(algorithm::tail(curline)); - } - // Illumination - if (algorithm::firstToken(curline) == "illum") - { - tempMaterial.illum = std::stoi(algorithm::tail(curline)); - } - // Ambient Texture Map - if (algorithm::firstToken(curline) == "map_Ka") - { - tempMaterial.map_Ka = algorithm::tail(curline); - } - // Diffuse Texture Map - if (algorithm::firstToken(curline) == "map_Kd") - { - tempMaterial.map_Kd = algorithm::tail(curline); - } - // Specular Texture Map - if (algorithm::firstToken(curline) == "map_Ks") - { - tempMaterial.map_Ks = algorithm::tail(curline); - } - // Specular Hightlight Map - if (algorithm::firstToken(curline) == "map_Ns") - { - tempMaterial.map_Ns = algorithm::tail(curline); - } - // Alpha Texture Map - if (algorithm::firstToken(curline) == "map_d") - { - tempMaterial.map_d = algorithm::tail(curline); - } - // Bump Map - if (algorithm::firstToken(curline) == "map_Bump" || algorithm::firstToken(curline) == "map_bump" || algorithm::firstToken(curline) == "bump") - { - tempMaterial.map_bump = algorithm::tail(curline); - } - } - - // Deal with last material - - // Push Back loaded Material - LoadedMaterials.push_back(tempMaterial); - - // Test to see if anything was loaded - // If not return false - if (LoadedMaterials.empty()) - return false; - // If so return true - else - return true; - } -} - -#endif diff --git a/include/tiny_obj_loader.h b/include/tiny_obj_loader.h new file mode 100644 index 0000000..8b61f05 --- /dev/null +++ b/include/tiny_obj_loader.h @@ -0,0 +1,2564 @@ +/* +The MIT License (MIT) + +Copyright (c) 2012-2018 Syoyo Fujita and many contributors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. +*/ + +// +// version 1.4.0 : Modifed ParseTextureNameAndOption API +// version 1.3.1 : Make ParseTextureNameAndOption API public +// version 1.3.0 : Separate warning and error message(breaking API of LoadObj) +// version 1.2.3 : Added color space extension('-colorspace') to tex opts. +// version 1.2.2 : Parse multiple group names. +// version 1.2.1 : Added initial support for line('l') primitive(PR #178) +// version 1.2.0 : Hardened implementation(#175) +// version 1.1.1 : Support smoothing groups(#162) +// version 1.1.0 : Support parsing vertex color(#144) +// version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138) +// version 1.0.7 : Support multiple tex options(#126) +// version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124) +// version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43) +// version 1.0.4 : Support multiple filenames for 'mtllib'(#112) +// version 1.0.3 : Support parsing texture options(#85) +// version 1.0.2 : Improve parsing speed by about a factor of 2 for large +// files(#105) +// version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104) +// version 1.0.0 : Change data structure. Change license from BSD to MIT. +// + +// +// Use this in *one* .cc +// #define TINYOBJLOADER_IMPLEMENTATION +// #include "tiny_obj_loader.h" +// + +#ifndef TINY_OBJ_LOADER_H_ +#define TINY_OBJ_LOADER_H_ + +#include +#include +#include + +namespace tinyobj { + +#ifdef __clang__ +#pragma clang diagnostic push +#if __has_warning("-Wzero-as-null-pointer-constant") +#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" +#endif + +#pragma clang diagnostic ignored "-Wpadded" + +#endif + +// https://en.wikipedia.org/wiki/Wavefront_.obj_file says ... +// +// -blendu on | off # set horizontal texture blending +// (default on) +// -blendv on | off # set vertical texture blending +// (default on) +// -boost real_value # boost mip-map sharpness +// -mm base_value gain_value # modify texture map values (default +// 0 1) +// # base_value = brightness, +// gain_value = contrast +// -o u [v [w]] # Origin offset (default +// 0 0 0) +// -s u [v [w]] # Scale (default +// 1 1 1) +// -t u [v [w]] # Turbulence (default +// 0 0 0) +// -texres resolution # texture resolution to create +// -clamp on | off # only render texels in the clamped +// 0-1 range (default off) +// # When unclamped, textures are +// repeated across a surface, +// # when clamped, only texels which +// fall within the 0-1 +// # range are rendered. +// -bm mult_value # bump multiplier (for bump maps +// only) +// +// -imfchan r | g | b | m | l | z # specifies which channel of the file +// is used to +// # create a scalar or bump texture. +// r:red, g:green, +// # b:blue, m:matte, l:luminance, +// z:z-depth.. +// # (the default for bump is 'l' and +// for decal is 'm') +// bump -imfchan r bumpmap.tga # says to use the red channel of +// bumpmap.tga as the bumpmap +// +// For reflection maps... +// +// -type sphere # specifies a sphere for a "refl" +// reflection map +// -type cube_top | cube_bottom | # when using a cube map, the texture +// file for each +// cube_front | cube_back | # side of the cube is specified +// separately +// cube_left | cube_right +// +// TinyObjLoader extension. +// +// -colorspace SPACE # Color space of the texture. e.g. +// 'sRGB` or 'linear' +// + +#ifdef TINYOBJLOADER_USE_DOUBLE +//#pragma message "using double" +typedef double real_t; +#else +//#pragma message "using float" +typedef float real_t; +#endif + +typedef enum { + TEXTURE_TYPE_NONE, // default + TEXTURE_TYPE_SPHERE, + TEXTURE_TYPE_CUBE_TOP, + TEXTURE_TYPE_CUBE_BOTTOM, + TEXTURE_TYPE_CUBE_FRONT, + TEXTURE_TYPE_CUBE_BACK, + TEXTURE_TYPE_CUBE_LEFT, + TEXTURE_TYPE_CUBE_RIGHT +} texture_type_t; + +typedef struct { + texture_type_t type; // -type (default TEXTURE_TYPE_NONE) + real_t sharpness; // -boost (default 1.0?) + real_t brightness; // base_value in -mm option (default 0) + real_t contrast; // gain_value in -mm option (default 1) + real_t origin_offset[3]; // -o u [v [w]] (default 0 0 0) + real_t scale[3]; // -s u [v [w]] (default 1 1 1) + real_t turbulence[3]; // -t u [v [w]] (default 0 0 0) + // int texture_resolution; // -texres resolution (default = ?) TODO + bool clamp; // -clamp (default false) + char imfchan; // -imfchan (the default for bump is 'l' and for decal is 'm') + bool blendu; // -blendu (default on) + bool blendv; // -blendv (default on) + real_t bump_multiplier; // -bm (for bump maps only, default 1.0) + + // extension + std::string colorspace; // Explicitly specify color space of stored texel + // value. Usually `sRGB` or `linear` (default empty). +} texture_option_t; + +typedef struct { + std::string name; + + real_t ambient[3]; + real_t diffuse[3]; + real_t specular[3]; + real_t transmittance[3]; + real_t emission[3]; + real_t shininess; + real_t ior; // index of refraction + real_t dissolve; // 1 == opaque; 0 == fully transparent + // illumination model (see http://www.fileformat.info/format/material/) + int illum; + + int dummy; // Suppress padding warning. + + std::string ambient_texname; // map_Ka + std::string diffuse_texname; // map_Kd + std::string specular_texname; // map_Ks + std::string specular_highlight_texname; // map_Ns + std::string bump_texname; // map_bump, map_Bump, bump + std::string displacement_texname; // disp + std::string alpha_texname; // map_d + std::string reflection_texname; // refl + + texture_option_t ambient_texopt; + texture_option_t diffuse_texopt; + texture_option_t specular_texopt; + texture_option_t specular_highlight_texopt; + texture_option_t bump_texopt; + texture_option_t displacement_texopt; + texture_option_t alpha_texopt; + texture_option_t reflection_texopt; + + // PBR extension + // http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr + real_t roughness; // [0, 1] default 0 + real_t metallic; // [0, 1] default 0 + real_t sheen; // [0, 1] default 0 + real_t clearcoat_thickness; // [0, 1] default 0 + real_t clearcoat_roughness; // [0, 1] default 0 + real_t anisotropy; // aniso. [0, 1] default 0 + real_t anisotropy_rotation; // anisor. [0, 1] default 0 + real_t pad0; + std::string roughness_texname; // map_Pr + std::string metallic_texname; // map_Pm + std::string sheen_texname; // map_Ps + std::string emissive_texname; // map_Ke + std::string normal_texname; // norm. For normal mapping. + + texture_option_t roughness_texopt; + texture_option_t metallic_texopt; + texture_option_t sheen_texopt; + texture_option_t emissive_texopt; + texture_option_t normal_texopt; + + int pad2; + + std::map unknown_parameter; +} material_t; + +typedef struct { + std::string name; + + std::vector intValues; + std::vector floatValues; + std::vector stringValues; +} tag_t; + +// Index struct to support different indices for vtx/normal/texcoord. +// -1 means not used. +typedef struct { + int vertex_index; + int normal_index; + int texcoord_index; +} index_t; + +typedef struct { + std::vector indices; + std::vector num_face_vertices; // The number of vertices per + // face. 3 = polygon, 4 = quad, + // ... Up to 255. + std::vector material_ids; // per-face material ID + std::vector smoothing_group_ids; // per-face smoothing group + // ID(0 = off. positive value + // = group id) + std::vector tags; // SubD tag +} mesh_t; + +typedef struct { + std::vector indices; // pairs of indices for lines +} path_t; + +typedef struct { + std::string name; + mesh_t mesh; + path_t path; +} shape_t; + +// Vertex attributes +typedef struct { + std::vector vertices; // 'v' + std::vector normals; // 'vn' + std::vector texcoords; // 'vt' + std::vector colors; // extension: vertex colors +} attrib_t; + +typedef struct callback_t_ { + // W is optional and set to 1 if there is no `w` item in `v` line + void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w); + void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z); + + // y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in + // `vt` line. + void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z); + + // called per 'f' line. num_indices is the number of face indices(e.g. 3 for + // triangle, 4 for quad) + // 0 will be passed for undefined index in index_t members. + void (*index_cb)(void *user_data, index_t *indices, int num_indices); + // `name` material name, `material_id` = the array index of material_t[]. -1 + // if + // a material not found in .mtl + void (*usemtl_cb)(void *user_data, const char *name, int material_id); + // `materials` = parsed material data. + void (*mtllib_cb)(void *user_data, const material_t *materials, + int num_materials); + // There may be multiple group names + void (*group_cb)(void *user_data, const char **names, int num_names); + void (*object_cb)(void *user_data, const char *name); + + callback_t_() + : vertex_cb(NULL), + normal_cb(NULL), + texcoord_cb(NULL), + index_cb(NULL), + usemtl_cb(NULL), + mtllib_cb(NULL), + group_cb(NULL), + object_cb(NULL) {} +} callback_t; + +class MaterialReader { + public: + MaterialReader() {} + virtual ~MaterialReader(); + + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err) = 0; +}; + +class MaterialFileReader : public MaterialReader { + public: + explicit MaterialFileReader(const std::string &mtl_basedir) + : m_mtlBaseDir(mtl_basedir) {} + virtual ~MaterialFileReader() {} + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err); + + private: + std::string m_mtlBaseDir; +}; + +class MaterialStreamReader : public MaterialReader { + public: + explicit MaterialStreamReader(std::istream &inStream) + : m_inStream(inStream) {} + virtual ~MaterialStreamReader() {} + virtual bool operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, std::string *warn, + std::string *err); + + private: + std::istream &m_inStream; +}; + +/// Loads .obj from a file. +/// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data +/// 'shapes' will be filled with parsed shape data +/// Returns true when loading .obj become success. +/// Returns warning message into `warn`, and error message into `err` +/// 'mtl_basedir' is optional, and used for base directory for .mtl file. +/// In default(`NULL'), .mtl file is searched from an application's working +/// directory. +/// 'triangulate' is optional, and used whether triangulate polygon face in .obj +/// or not. +/// Option 'default_vcols_fallback' specifies whether vertex colors should +/// always be defined, even if no colors are given (fallback to white). +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, const char *filename, + const char *mtl_basedir = NULL, bool triangulate = true, + bool default_vcols_fallback = true); + +/// Loads .obj from a file with custom user callback. +/// .mtl is loaded as usual and parsed material_t data will be passed to +/// `callback.mtllib_cb`. +/// Returns true when loading .obj/.mtl become success. +/// Returns warning message into `warn`, and error message into `err` +/// See `examples/callback_api/` for how to use this function. +bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, + void *user_data = NULL, + MaterialReader *readMatFn = NULL, + std::string *warn = NULL, std::string *err = NULL); + +/// Loads object from a std::istream, uses GetMtlIStreamFn to retrieve +/// std::istream for materials. +/// Returns true when loading .obj become success. +/// Returns warning and error message into `err` +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, std::istream *inStream, + MaterialReader *readMatFn = NULL, bool triangulate = true, + bool default_vcols_fallback = true); + +/// Loads materials into std::map +void LoadMtl(std::map *material_map, + std::vector *materials, std::istream *inStream, + std::string *warning, std::string *err); + +/// +/// Parse texture name and texture option for custom texture parameter through +/// material::unknown_parameter +/// +/// @param[out] texname Parsed texture name +/// @param[out] texopt Parsed texopt +/// @param[in] linebuf Input string +/// +bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, + const char *linebuf); +} // namespace tinyobj + +#endif // TINY_OBJ_LOADER_H_ + +#ifdef TINYOBJLOADER_IMPLEMENTATION +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +namespace tinyobj { + +MaterialReader::~MaterialReader() {} + +struct vertex_index_t { + int v_idx, vt_idx, vn_idx; + vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {} + explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {} + vertex_index_t(int vidx, int vtidx, int vnidx) + : v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {} +}; + +// Internal data structure for face representation +// index + smoothing group. +struct face_t { + unsigned int + smoothing_group_id; // smoothing group id. 0 = smoothing groupd is off. + int pad_; + std::vector vertex_indices; // face vertex indices. + + face_t() : smoothing_group_id(0), pad_(0) {} +}; + +struct line_t { + int idx0; + int idx1; +}; + +struct tag_sizes { + tag_sizes() : num_ints(0), num_reals(0), num_strings(0) {} + int num_ints; + int num_reals; + int num_strings; +}; + +struct obj_shape { + std::vector v; + std::vector vn; + std::vector vt; +}; + +// See +// http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf +static std::istream &safeGetline(std::istream &is, std::string &t) { + t.clear(); + + // The characters in the stream are read one-by-one using a std::streambuf. + // That is faster than reading them one-by-one using the std::istream. + // Code that uses streambuf this way must be guarded by a sentry object. + // The sentry object performs various tasks, + // such as thread synchronization and updating the stream state. + + std::istream::sentry se(is, true); + std::streambuf *sb = is.rdbuf(); + + if (se) { + for (;;) { + int c = sb->sbumpc(); + switch (c) { + case '\n': + return is; + case '\r': + if (sb->sgetc() == '\n') sb->sbumpc(); + return is; + case EOF: + // Also handle the case when the last line has no line ending + if (t.empty()) is.setstate(std::ios::eofbit); + return is; + default: + t += static_cast(c); + } + } + } + + return is; +} + +#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t')) +#define IS_DIGIT(x) \ + (static_cast((x) - '0') < static_cast(10)) +#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0')) + +// Make index zero-base, and also support relative index. +static inline bool fixIndex(int idx, int n, int *ret) { + if (!ret) { + return false; + } + + if (idx > 0) { + (*ret) = idx - 1; + return true; + } + + if (idx == 0) { + // zero is not allowed according to the spec. + return false; + } + + if (idx < 0) { + (*ret) = n + idx; // negative value = relative + return true; + } + + return false; // never reach here. +} + +static inline std::string parseString(const char **token) { + std::string s; + (*token) += strspn((*token), " \t"); + size_t e = strcspn((*token), " \t\r"); + s = std::string((*token), &(*token)[e]); + (*token) += e; + return s; +} + +static inline int parseInt(const char **token) { + (*token) += strspn((*token), " \t"); + int i = atoi((*token)); + (*token) += strcspn((*token), " \t\r"); + return i; +} + +// Tries to parse a floating point number located at s. +// +// s_end should be a location in the string where reading should absolutely +// stop. For example at the end of the string, to prevent buffer overflows. +// +// Parses the following EBNF grammar: +// sign = "+" | "-" ; +// END = ? anything not in digit ? +// digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; +// integer = [sign] , digit , {digit} ; +// decimal = integer , ["." , integer] ; +// float = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ; +// +// Valid strings are for example: +// -0 +3.1417e+2 -0.0E-3 1.0324 -1.41 11e2 +// +// If the parsing is a success, result is set to the parsed value and true +// is returned. +// +// The function is greedy and will parse until any of the following happens: +// - a non-conforming character is encountered. +// - s_end is reached. +// +// The following situations triggers a failure: +// - s >= s_end. +// - parse failure. +// +static bool tryParseDouble(const char *s, const char *s_end, double *result) { + if (s >= s_end) { + return false; + } + + double mantissa = 0.0; + // This exponent is base 2 rather than 10. + // However the exponent we parse is supposed to be one of ten, + // thus we must take care to convert the exponent/and or the + // mantissa to a * 2^E, where a is the mantissa and E is the + // exponent. + // To get the final double we will use ldexp, it requires the + // exponent to be in base 2. + int exponent = 0; + + // NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED + // TO JUMP OVER DEFINITIONS. + char sign = '+'; + char exp_sign = '+'; + char const *curr = s; + + // How many characters were read in a loop. + int read = 0; + // Tells whether a loop terminated due to reaching s_end. + bool end_not_reached = false; + + /* + BEGIN PARSING. + */ + + // Find out what sign we've got. + if (*curr == '+' || *curr == '-') { + sign = *curr; + curr++; + } else if (IS_DIGIT(*curr)) { /* Pass through. */ + } else { + goto fail; + } + + // Read the integer part. + end_not_reached = (curr != s_end); + while (end_not_reached && IS_DIGIT(*curr)) { + mantissa *= 10; + mantissa += static_cast(*curr - 0x30); + curr++; + read++; + end_not_reached = (curr != s_end); + } + + // We must make sure we actually got something. + if (read == 0) goto fail; + // We allow numbers of form "#", "###" etc. + if (!end_not_reached) goto assemble; + + // Read the decimal part. + if (*curr == '.') { + curr++; + read = 1; + end_not_reached = (curr != s_end); + while (end_not_reached && IS_DIGIT(*curr)) { + static const double pow_lut[] = { + 1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, + }; + const int lut_entries = sizeof pow_lut / sizeof pow_lut[0]; + + // NOTE: Don't use powf here, it will absolutely murder precision. + mantissa += static_cast(*curr - 0x30) * + (read < lut_entries ? pow_lut[read] : std::pow(10.0, -read)); + read++; + curr++; + end_not_reached = (curr != s_end); + } + } else if (*curr == 'e' || *curr == 'E') { + } else { + goto assemble; + } + + if (!end_not_reached) goto assemble; + + // Read the exponent part. + if (*curr == 'e' || *curr == 'E') { + curr++; + // Figure out if a sign is present and if it is. + end_not_reached = (curr != s_end); + if (end_not_reached && (*curr == '+' || *curr == '-')) { + exp_sign = *curr; + curr++; + } else if (IS_DIGIT(*curr)) { /* Pass through. */ + } else { + // Empty E is not allowed. + goto fail; + } + + read = 0; + end_not_reached = (curr != s_end); + while (end_not_reached && IS_DIGIT(*curr)) { + exponent *= 10; + exponent += static_cast(*curr - 0x30); + curr++; + read++; + end_not_reached = (curr != s_end); + } + exponent *= (exp_sign == '+' ? 1 : -1); + if (read == 0) goto fail; + } + +assemble: + *result = (sign == '+' ? 1 : -1) * + (exponent ? std::ldexp(mantissa * std::pow(5.0, exponent), exponent) + : mantissa); + return true; +fail: + return false; +} + +static inline real_t parseReal(const char **token, double default_value = 0.0) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + double val = default_value; + tryParseDouble((*token), end, &val); + real_t f = static_cast(val); + (*token) = end; + return f; +} + +static inline bool parseReal(const char **token, real_t *out) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + double val; + bool ret = tryParseDouble((*token), end, &val); + if (ret) { + real_t f = static_cast(val); + (*out) = f; + } + (*token) = end; + return ret; +} + +static inline void parseReal2(real_t *x, real_t *y, const char **token, + const double default_x = 0.0, + const double default_y = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); +} + +static inline void parseReal3(real_t *x, real_t *y, real_t *z, + const char **token, const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); +} + +static inline void parseV(real_t *x, real_t *y, real_t *z, real_t *w, + const char **token, const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0, + const double default_w = 1.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); + (*w) = parseReal(token, default_w); +} + +// Extension: parse vertex with colors(6 items) +static inline bool parseVertexWithColor(real_t *x, real_t *y, real_t *z, + real_t *r, real_t *g, real_t *b, + const char **token, + const double default_x = 0.0, + const double default_y = 0.0, + const double default_z = 0.0) { + (*x) = parseReal(token, default_x); + (*y) = parseReal(token, default_y); + (*z) = parseReal(token, default_z); + + const bool found_color = + parseReal(token, r) && parseReal(token, g) && parseReal(token, b); + + if (!found_color) { + (*r) = (*g) = (*b) = 1.0; + } + + return found_color; +} + +static inline bool parseOnOff(const char **token, bool default_value = true) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + + bool ret = default_value; + if ((0 == strncmp((*token), "on", 2))) { + ret = true; + } else if ((0 == strncmp((*token), "off", 3))) { + ret = false; + } + + (*token) = end; + return ret; +} + +static inline texture_type_t parseTextureType( + const char **token, texture_type_t default_value = TEXTURE_TYPE_NONE) { + (*token) += strspn((*token), " \t"); + const char *end = (*token) + strcspn((*token), " \t\r"); + texture_type_t ty = default_value; + + if ((0 == strncmp((*token), "cube_top", strlen("cube_top")))) { + ty = TEXTURE_TYPE_CUBE_TOP; + } else if ((0 == strncmp((*token), "cube_bottom", strlen("cube_bottom")))) { + ty = TEXTURE_TYPE_CUBE_BOTTOM; + } else if ((0 == strncmp((*token), "cube_left", strlen("cube_left")))) { + ty = TEXTURE_TYPE_CUBE_LEFT; + } else if ((0 == strncmp((*token), "cube_right", strlen("cube_right")))) { + ty = TEXTURE_TYPE_CUBE_RIGHT; + } else if ((0 == strncmp((*token), "cube_front", strlen("cube_front")))) { + ty = TEXTURE_TYPE_CUBE_FRONT; + } else if ((0 == strncmp((*token), "cube_back", strlen("cube_back")))) { + ty = TEXTURE_TYPE_CUBE_BACK; + } else if ((0 == strncmp((*token), "sphere", strlen("sphere")))) { + ty = TEXTURE_TYPE_SPHERE; + } + + (*token) = end; + return ty; +} + +static tag_sizes parseTagTriple(const char **token) { + tag_sizes ts; + + (*token) += strspn((*token), " \t"); + ts.num_ints = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return ts; + } + + (*token)++; // Skip '/' + + (*token) += strspn((*token), " \t"); + ts.num_reals = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return ts; + } + (*token)++; // Skip '/' + + ts.num_strings = parseInt(token); + + return ts; +} + +// Parse triples with index offsets: i, i/j/k, i//k, i/j +static bool parseTriple(const char **token, int vsize, int vnsize, int vtsize, + vertex_index_t *ret) { + if (!ret) { + return false; + } + + vertex_index_t vi(-1); + + if (!fixIndex(atoi((*token)), vsize, &(vi.v_idx))) { + return false; + } + + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + (*ret) = vi; + return true; + } + (*token)++; + + // i//k + if ((*token)[0] == '/') { + (*token)++; + if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { + return false; + } + (*token) += strcspn((*token), "/ \t\r"); + (*ret) = vi; + return true; + } + + // i/j/k or i/j + if (!fixIndex(atoi((*token)), vtsize, &(vi.vt_idx))) { + return false; + } + + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + (*ret) = vi; + return true; + } + + // i/j/k + (*token)++; // skip '/' + if (!fixIndex(atoi((*token)), vnsize, &(vi.vn_idx))) { + return false; + } + (*token) += strcspn((*token), "/ \t\r"); + + (*ret) = vi; + + return true; +} + +// Parse raw triples: i, i/j/k, i//k, i/j +static vertex_index_t parseRawTriple(const char **token) { + vertex_index_t vi(static_cast(0)); // 0 is an invalid index in OBJ + + vi.v_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return vi; + } + (*token)++; + + // i//k + if ((*token)[0] == '/') { + (*token)++; + vi.vn_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + return vi; + } + + // i/j/k or i/j + vi.vt_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + if ((*token)[0] != '/') { + return vi; + } + + // i/j/k + (*token)++; // skip '/' + vi.vn_idx = atoi((*token)); + (*token) += strcspn((*token), "/ \t\r"); + return vi; +} + +bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, + const char *linebuf) { + // @todo { write more robust lexer and parser. } + bool found_texname = false; + std::string texture_name; + + const char *token = linebuf; // Assume line ends with NULL + + while (!IS_NEW_LINE((*token))) { + token += strspn(token, " \t"); // skip space + if ((0 == strncmp(token, "-blendu", 7)) && IS_SPACE((token[7]))) { + token += 8; + texopt->blendu = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-blendv", 7)) && IS_SPACE((token[7]))) { + token += 8; + texopt->blendv = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-clamp", 6)) && IS_SPACE((token[6]))) { + token += 7; + texopt->clamp = parseOnOff(&token, /* default */ true); + } else if ((0 == strncmp(token, "-boost", 6)) && IS_SPACE((token[6]))) { + token += 7; + texopt->sharpness = parseReal(&token, 1.0); + } else if ((0 == strncmp(token, "-bm", 3)) && IS_SPACE((token[3]))) { + token += 4; + texopt->bump_multiplier = parseReal(&token, 1.0); + } else if ((0 == strncmp(token, "-o", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->origin_offset[0]), &(texopt->origin_offset[1]), + &(texopt->origin_offset[2]), &token); + } else if ((0 == strncmp(token, "-s", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->scale[0]), &(texopt->scale[1]), &(texopt->scale[2]), + &token, 1.0, 1.0, 1.0); + } else if ((0 == strncmp(token, "-t", 2)) && IS_SPACE((token[2]))) { + token += 3; + parseReal3(&(texopt->turbulence[0]), &(texopt->turbulence[1]), + &(texopt->turbulence[2]), &token); + } else if ((0 == strncmp(token, "-type", 5)) && IS_SPACE((token[5]))) { + token += 5; + texopt->type = parseTextureType((&token), TEXTURE_TYPE_NONE); + } else if ((0 == strncmp(token, "-imfchan", 8)) && IS_SPACE((token[8]))) { + token += 9; + token += strspn(token, " \t"); + const char *end = token + strcspn(token, " \t\r"); + if ((end - token) == 1) { // Assume one char for -imfchan + texopt->imfchan = (*token); + } + token = end; + } else if ((0 == strncmp(token, "-mm", 3)) && IS_SPACE((token[3]))) { + token += 4; + parseReal2(&(texopt->brightness), &(texopt->contrast), &token, 0.0, 1.0); + } else if ((0 == strncmp(token, "-colorspace", 11)) && + IS_SPACE((token[11]))) { + token += 12; + texopt->colorspace = parseString(&token); + } else { +// Assume texture filename +#if 0 + size_t len = strcspn(token, " \t\r"); // untile next space + texture_name = std::string(token, token + len); + token += len; + + token += strspn(token, " \t"); // skip space +#else + // Read filename until line end to parse filename containing whitespace + // TODO(syoyo): Support parsing texture option flag after the filename. + texture_name = std::string(token); + token += texture_name.length(); +#endif + + found_texname = true; + } + } + + if (found_texname) { + (*texname) = texture_name; + return true; + } else { + return false; + } +} + +static void InitTexOpt(texture_option_t *texopt, const bool is_bump) { + if (is_bump) { + texopt->imfchan = 'l'; + } else { + texopt->imfchan = 'm'; + } + texopt->bump_multiplier = static_cast(1.0); + texopt->clamp = false; + texopt->blendu = true; + texopt->blendv = true; + texopt->sharpness = static_cast(1.0); + texopt->brightness = static_cast(0.0); + texopt->contrast = static_cast(1.0); + texopt->origin_offset[0] = static_cast(0.0); + texopt->origin_offset[1] = static_cast(0.0); + texopt->origin_offset[2] = static_cast(0.0); + texopt->scale[0] = static_cast(1.0); + texopt->scale[1] = static_cast(1.0); + texopt->scale[2] = static_cast(1.0); + texopt->turbulence[0] = static_cast(0.0); + texopt->turbulence[1] = static_cast(0.0); + texopt->turbulence[2] = static_cast(0.0); + texopt->type = TEXTURE_TYPE_NONE; +} + +static void InitMaterial(material_t *material) { + InitTexOpt(&material->ambient_texopt, /* is_bump */ false); + InitTexOpt(&material->diffuse_texopt, /* is_bump */ false); + InitTexOpt(&material->specular_texopt, /* is_bump */ false); + InitTexOpt(&material->specular_highlight_texopt, /* is_bump */ false); + InitTexOpt(&material->bump_texopt, /* is_bump */ true); + InitTexOpt(&material->displacement_texopt, /* is_bump */ false); + InitTexOpt(&material->alpha_texopt, /* is_bump */ false); + InitTexOpt(&material->reflection_texopt, /* is_bump */ false); + InitTexOpt(&material->roughness_texopt, /* is_bump */ false); + InitTexOpt(&material->metallic_texopt, /* is_bump */ false); + InitTexOpt(&material->sheen_texopt, /* is_bump */ false); + InitTexOpt(&material->emissive_texopt, /* is_bump */ false); + InitTexOpt(&material->normal_texopt, + /* is_bump */ false); // @fixme { is_bump will be true? } + material->name = ""; + material->ambient_texname = ""; + material->diffuse_texname = ""; + material->specular_texname = ""; + material->specular_highlight_texname = ""; + material->bump_texname = ""; + material->displacement_texname = ""; + material->reflection_texname = ""; + material->alpha_texname = ""; + for (int i = 0; i < 3; i++) { + material->ambient[i] = static_cast(0.0); + material->diffuse[i] = static_cast(0.0); + material->specular[i] = static_cast(0.0); + material->transmittance[i] = static_cast(0.0); + material->emission[i] = static_cast(0.0); + } + material->illum = 0; + material->dissolve = static_cast(1.0); + material->shininess = static_cast(1.0); + material->ior = static_cast(1.0); + + material->roughness = static_cast(0.0); + material->metallic = static_cast(0.0); + material->sheen = static_cast(0.0); + material->clearcoat_thickness = static_cast(0.0); + material->clearcoat_roughness = static_cast(0.0); + material->anisotropy_rotation = static_cast(0.0); + material->anisotropy = static_cast(0.0); + material->roughness_texname = ""; + material->metallic_texname = ""; + material->sheen_texname = ""; + material->emissive_texname = ""; + material->normal_texname = ""; + + material->unknown_parameter.clear(); +} + +// code from https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html +template +static int pnpoly(int nvert, T *vertx, T *verty, T testx, T testy) { + int i, j, c = 0; + for (i = 0, j = nvert - 1; i < nvert; j = i++) { + if (((verty[i] > testy) != (verty[j] > testy)) && + (testx < + (vertx[j] - vertx[i]) * (testy - verty[i]) / (verty[j] - verty[i]) + + vertx[i])) + c = !c; + } + return c; +} + +// TODO(syoyo): refactor function. +static bool exportGroupsToShape(shape_t *shape, + const std::vector &faceGroup, + std::vector &lineGroup, + const std::vector &tags, + const int material_id, const std::string &name, + bool triangulate, + const std::vector &v) { + if (faceGroup.empty() && lineGroup.empty()) { + return false; + } + + if (!faceGroup.empty()) { + // Flatten vertices and indices + for (size_t i = 0; i < faceGroup.size(); i++) { + const face_t &face = faceGroup[i]; + + size_t npolys = face.vertex_indices.size(); + + if (npolys < 3) { + // Face must have 3+ vertices. + continue; + } + + vertex_index_t i0 = face.vertex_indices[0]; + vertex_index_t i1(-1); + vertex_index_t i2 = face.vertex_indices[1]; + + if (triangulate) { + // find the two axes to work in + size_t axes[2] = {1, 2}; + for (size_t k = 0; k < npolys; ++k) { + i0 = face.vertex_indices[(k + 0) % npolys]; + i1 = face.vertex_indices[(k + 1) % npolys]; + i2 = face.vertex_indices[(k + 2) % npolys]; + size_t vi0 = size_t(i0.v_idx); + size_t vi1 = size_t(i1.v_idx); + size_t vi2 = size_t(i2.v_idx); + + if (((3 * vi0 + 2) >= v.size()) || ((3 * vi1 + 2) >= v.size()) || + ((3 * vi2 + 2) >= v.size())) { + // Invalid triangle. + // FIXME(syoyo): Is it ok to simply skip this invalid triangle? + continue; + } + real_t v0x = v[vi0 * 3 + 0]; + real_t v0y = v[vi0 * 3 + 1]; + real_t v0z = v[vi0 * 3 + 2]; + real_t v1x = v[vi1 * 3 + 0]; + real_t v1y = v[vi1 * 3 + 1]; + real_t v1z = v[vi1 * 3 + 2]; + real_t v2x = v[vi2 * 3 + 0]; + real_t v2y = v[vi2 * 3 + 1]; + real_t v2z = v[vi2 * 3 + 2]; + real_t e0x = v1x - v0x; + real_t e0y = v1y - v0y; + real_t e0z = v1z - v0z; + real_t e1x = v2x - v1x; + real_t e1y = v2y - v1y; + real_t e1z = v2z - v1z; + real_t cx = std::fabs(e0y * e1z - e0z * e1y); + real_t cy = std::fabs(e0z * e1x - e0x * e1z); + real_t cz = std::fabs(e0x * e1y - e0y * e1x); + const real_t epsilon = std::numeric_limits::epsilon(); + if (cx > epsilon || cy > epsilon || cz > epsilon) { + // found a corner + if (cx > cy && cx > cz) { + } else { + axes[0] = 0; + if (cz > cx && cz > cy) axes[1] = 1; + } + break; + } + } + + real_t area = 0; + for (size_t k = 0; k < npolys; ++k) { + i0 = face.vertex_indices[(k + 0) % npolys]; + i1 = face.vertex_indices[(k + 1) % npolys]; + size_t vi0 = size_t(i0.v_idx); + size_t vi1 = size_t(i1.v_idx); + if (((vi0 * 3 + axes[0]) >= v.size()) || + ((vi0 * 3 + axes[1]) >= v.size()) || + ((vi1 * 3 + axes[0]) >= v.size()) || + ((vi1 * 3 + axes[1]) >= v.size())) { + // Invalid index. + continue; + } + real_t v0x = v[vi0 * 3 + axes[0]]; + real_t v0y = v[vi0 * 3 + axes[1]]; + real_t v1x = v[vi1 * 3 + axes[0]]; + real_t v1y = v[vi1 * 3 + axes[1]]; + area += (v0x * v1y - v0y * v1x) * static_cast(0.5); + } + + + face_t remainingFace = face; // copy + size_t guess_vert = 0; + vertex_index_t ind[3]; + real_t vx[3]; + real_t vy[3]; + + // How many iterations can we do without decreasing the remaining + // vertices. + size_t remainingIterations = face.vertex_indices.size(); + size_t previousRemainingVertices = remainingFace.vertex_indices.size(); + + while (remainingFace.vertex_indices.size() > 3 && remainingIterations > 0){ + npolys = remainingFace.vertex_indices.size(); + if (guess_vert >= npolys) { + guess_vert -= npolys; + } + + if (previousRemainingVertices != npolys) { + // The number of remaining vertices decreased. Reset counters. + previousRemainingVertices = npolys; + remainingIterations = npolys; + } else { + // We didn't consume a vertex on previous iteration, reduce the + // available iterations. + remainingIterations--; + } + + for (size_t k = 0; k < 3; k++) { + ind[k] = remainingFace.vertex_indices[(guess_vert + k) % npolys]; + size_t vi = size_t(ind[k].v_idx); + if (((vi * 3 + axes[0]) >= v.size()) || + ((vi * 3 + axes[1]) >= v.size())) { + // ??? + vx[k] = static_cast(0.0); + vy[k] = static_cast(0.0); + } else { + vx[k] = v[vi * 3 + axes[0]]; + vy[k] = v[vi * 3 + axes[1]]; + } + } + real_t e0x = vx[1] - vx[0]; + real_t e0y = vy[1] - vy[0]; + real_t e1x = vx[2] - vx[1]; + real_t e1y = vy[2] - vy[1]; + real_t cross = e0x * e1y - e0y * e1x; + // if an internal angle + if (cross * area < static_cast(0.0)) { + guess_vert += 1; + continue; + } + + // check all other verts in case they are inside this triangle + bool overlap = false; + for (size_t otherVert = 3; otherVert < npolys; ++otherVert) { + size_t idx = (guess_vert + otherVert) % npolys; + + if (idx >= remainingFace.vertex_indices.size()) { + // ??? + continue; + } + + size_t ovi = size_t(remainingFace.vertex_indices[idx].v_idx); + + if (((ovi * 3 + axes[0]) >= v.size()) || + ((ovi * 3 + axes[1]) >= v.size())) { + // ??? + continue; + } + real_t tx = v[ovi * 3 + axes[0]]; + real_t ty = v[ovi * 3 + axes[1]]; + if (pnpoly(3, vx, vy, tx, ty)) { + overlap = true; + break; + } + } + + if (overlap) { + guess_vert += 1; + continue; + } + + // this triangle is an ear + { + index_t idx0, idx1, idx2; + idx0.vertex_index = ind[0].v_idx; + idx0.normal_index = ind[0].vn_idx; + idx0.texcoord_index = ind[0].vt_idx; + idx1.vertex_index = ind[1].v_idx; + idx1.normal_index = ind[1].vn_idx; + idx1.texcoord_index = ind[1].vt_idx; + idx2.vertex_index = ind[2].v_idx; + idx2.normal_index = ind[2].vn_idx; + idx2.texcoord_index = ind[2].vt_idx; + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.material_ids.push_back(material_id); + shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); + } + + // remove v1 from the list + size_t removed_vert_index = (guess_vert + 1) % npolys; + while (removed_vert_index + 1 < npolys) { + remainingFace.vertex_indices[removed_vert_index] = + remainingFace.vertex_indices[removed_vert_index + 1]; + removed_vert_index += 1; + } + remainingFace.vertex_indices.pop_back(); + } + + if (remainingFace.vertex_indices.size() == 3) { + i0 = remainingFace.vertex_indices[0]; + i1 = remainingFace.vertex_indices[1]; + i2 = remainingFace.vertex_indices[2]; + { + index_t idx0, idx1, idx2; + idx0.vertex_index = i0.v_idx; + idx0.normal_index = i0.vn_idx; + idx0.texcoord_index = i0.vt_idx; + idx1.vertex_index = i1.v_idx; + idx1.normal_index = i1.vn_idx; + idx1.texcoord_index = i1.vt_idx; + idx2.vertex_index = i2.v_idx; + idx2.normal_index = i2.vn_idx; + idx2.texcoord_index = i2.vt_idx; + + shape->mesh.indices.push_back(idx0); + shape->mesh.indices.push_back(idx1); + shape->mesh.indices.push_back(idx2); + + shape->mesh.num_face_vertices.push_back(3); + shape->mesh.material_ids.push_back(material_id); + shape->mesh.smoothing_group_ids.push_back(face.smoothing_group_id); + } + } + } else { + for (size_t k = 0; k < npolys; k++) { + index_t idx; + idx.vertex_index = face.vertex_indices[k].v_idx; + idx.normal_index = face.vertex_indices[k].vn_idx; + idx.texcoord_index = face.vertex_indices[k].vt_idx; + shape->mesh.indices.push_back(idx); + } + + shape->mesh.num_face_vertices.push_back( + static_cast(npolys)); + shape->mesh.material_ids.push_back(material_id); // per face + shape->mesh.smoothing_group_ids.push_back( + face.smoothing_group_id); // per face + } + } + + shape->name = name; + shape->mesh.tags = tags; + } + + if (!lineGroup.empty()) { + shape->path.indices.swap(lineGroup); + } + + return true; +} + +// Split a string with specified delimiter character. +// http://stackoverflow.com/questions/236129/split-a-string-in-c +static void SplitString(const std::string &s, char delim, + std::vector &elems) { + std::stringstream ss; + ss.str(s); + std::string item; + while (std::getline(ss, item, delim)) { + elems.push_back(item); + } +} + +void LoadMtl(std::map *material_map, + std::vector *materials, std::istream *inStream, + std::string *warning, std::string *err) { + (void)err; + + // Create a default material anyway. + material_t material; + InitMaterial(&material); + + // Issue 43. `d` wins against `Tr` since `Tr` is not in the MTL specification. + bool has_d = false; + bool has_tr = false; + + std::stringstream warn_ss; + + size_t line_no = 0; + std::string linebuf; + while (inStream->peek() != -1) { + safeGetline(*inStream, linebuf); + line_no++; + + // Trim trailing whitespace. + if (linebuf.size() > 0) { + linebuf = linebuf.substr(0, linebuf.find_last_not_of(" \t") + 1); + } + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // new mtl + if ((0 == strncmp(token, "newmtl", 6)) && IS_SPACE((token[6]))) { + // flush previous material. + if (!material.name.empty()) { + material_map->insert(std::pair( + material.name, static_cast(materials->size()))); + materials->push_back(material); + } + + // initial temporary material + InitMaterial(&material); + + has_d = false; + has_tr = false; + + // set new mtl name + token += 7; + { + std::stringstream sstr; + sstr << token; + material.name = sstr.str(); + } + continue; + } + + // ambient + if (token[0] == 'K' && token[1] == 'a' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.ambient[0] = r; + material.ambient[1] = g; + material.ambient[2] = b; + continue; + } + + // diffuse + if (token[0] == 'K' && token[1] == 'd' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.diffuse[0] = r; + material.diffuse[1] = g; + material.diffuse[2] = b; + continue; + } + + // specular + if (token[0] == 'K' && token[1] == 's' && IS_SPACE((token[2]))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.specular[0] = r; + material.specular[1] = g; + material.specular[2] = b; + continue; + } + + // transmittance + if ((token[0] == 'K' && token[1] == 't' && IS_SPACE((token[2]))) || + (token[0] == 'T' && token[1] == 'f' && IS_SPACE((token[2])))) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.transmittance[0] = r; + material.transmittance[1] = g; + material.transmittance[2] = b; + continue; + } + + // ior(index of refraction) + if (token[0] == 'N' && token[1] == 'i' && IS_SPACE((token[2]))) { + token += 2; + material.ior = parseReal(&token); + continue; + } + + // emission + if (token[0] == 'K' && token[1] == 'e' && IS_SPACE(token[2])) { + token += 2; + real_t r, g, b; + parseReal3(&r, &g, &b, &token); + material.emission[0] = r; + material.emission[1] = g; + material.emission[2] = b; + continue; + } + + // shininess + if (token[0] == 'N' && token[1] == 's' && IS_SPACE(token[2])) { + token += 2; + material.shininess = parseReal(&token); + continue; + } + + // illum model + if (0 == strncmp(token, "illum", 5) && IS_SPACE(token[5])) { + token += 6; + material.illum = parseInt(&token); + continue; + } + + // dissolve + if ((token[0] == 'd' && IS_SPACE(token[1]))) { + token += 1; + material.dissolve = parseReal(&token); + + if (has_tr) { + warn_ss << "Both `d` and `Tr` parameters defined for \"" + << material.name + << "\". Use the value of `d` for dissolve (line " << line_no + << " in .mtl.)" << std::endl; + } + has_d = true; + continue; + } + if (token[0] == 'T' && token[1] == 'r' && IS_SPACE(token[2])) { + token += 2; + if (has_d) { + // `d` wins. Ignore `Tr` value. + warn_ss << "Both `d` and `Tr` parameters defined for \"" + << material.name + << "\". Use the value of `d` for dissolve (line " << line_no + << " in .mtl.)" << std::endl; + } else { + // We invert value of Tr(assume Tr is in range [0, 1]) + // NOTE: Interpretation of Tr is application(exporter) dependent. For + // some application(e.g. 3ds max obj exporter), Tr = d(Issue 43) + material.dissolve = static_cast(1.0) - parseReal(&token); + } + has_tr = true; + continue; + } + + // PBR: roughness + if (token[0] == 'P' && token[1] == 'r' && IS_SPACE(token[2])) { + token += 2; + material.roughness = parseReal(&token); + continue; + } + + // PBR: metallic + if (token[0] == 'P' && token[1] == 'm' && IS_SPACE(token[2])) { + token += 2; + material.metallic = parseReal(&token); + continue; + } + + // PBR: sheen + if (token[0] == 'P' && token[1] == 's' && IS_SPACE(token[2])) { + token += 2; + material.sheen = parseReal(&token); + continue; + } + + // PBR: clearcoat thickness + if (token[0] == 'P' && token[1] == 'c' && IS_SPACE(token[2])) { + token += 2; + material.clearcoat_thickness = parseReal(&token); + continue; + } + + // PBR: clearcoat roughness + if ((0 == strncmp(token, "Pcr", 3)) && IS_SPACE(token[3])) { + token += 4; + material.clearcoat_roughness = parseReal(&token); + continue; + } + + // PBR: anisotropy + if ((0 == strncmp(token, "aniso", 5)) && IS_SPACE(token[5])) { + token += 6; + material.anisotropy = parseReal(&token); + continue; + } + + // PBR: anisotropy rotation + if ((0 == strncmp(token, "anisor", 6)) && IS_SPACE(token[6])) { + token += 7; + material.anisotropy_rotation = parseReal(&token); + continue; + } + + // ambient texture + if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.ambient_texname), + &(material.ambient_texopt), token); + continue; + } + + // diffuse texture + if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.diffuse_texname), + &(material.diffuse_texopt), token); + continue; + } + + // specular texture + if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.specular_texname), + &(material.specular_texopt), token); + continue; + } + + // specular highlight texture + if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.specular_highlight_texname), + &(material.specular_highlight_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "map_bump", 8)) && IS_SPACE(token[8])) { + token += 9; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "map_Bump", 8)) && IS_SPACE(token[8])) { + token += 9; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // bump texture + if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.bump_texname), + &(material.bump_texopt), token); + continue; + } + + // alpha texture + if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) { + token += 6; + material.alpha_texname = token; + ParseTextureNameAndOption(&(material.alpha_texname), + &(material.alpha_texopt), token); + continue; + } + + // displacement texture + if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.displacement_texname), + &(material.displacement_texopt), token); + continue; + } + + // reflection map + if ((0 == strncmp(token, "refl", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.reflection_texname), + &(material.reflection_texopt), token); + continue; + } + + // PBR: roughness texture + if ((0 == strncmp(token, "map_Pr", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.roughness_texname), + &(material.roughness_texopt), token); + continue; + } + + // PBR: metallic texture + if ((0 == strncmp(token, "map_Pm", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.metallic_texname), + &(material.metallic_texopt), token); + continue; + } + + // PBR: sheen texture + if ((0 == strncmp(token, "map_Ps", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.sheen_texname), + &(material.sheen_texopt), token); + continue; + } + + // PBR: emissive texture + if ((0 == strncmp(token, "map_Ke", 6)) && IS_SPACE(token[6])) { + token += 7; + ParseTextureNameAndOption(&(material.emissive_texname), + &(material.emissive_texopt), token); + continue; + } + + // PBR: normal map texture + if ((0 == strncmp(token, "norm", 4)) && IS_SPACE(token[4])) { + token += 5; + ParseTextureNameAndOption(&(material.normal_texname), + &(material.normal_texopt), token); + continue; + } + + // unknown parameter + const char *_space = strchr(token, ' '); + if (!_space) { + _space = strchr(token, '\t'); + } + if (_space) { + std::ptrdiff_t len = _space - token; + std::string key(token, static_cast(len)); + std::string value = _space + 1; + material.unknown_parameter.insert( + std::pair(key, value)); + } + } + // flush last material. + material_map->insert(std::pair( + material.name, static_cast(materials->size()))); + materials->push_back(material); + + if (warning) { + (*warning) = warn_ss.str(); + } +} + +bool MaterialFileReader::operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, + std::string *warn, std::string *err) { + std::string filepath; + + if (!m_mtlBaseDir.empty()) { + filepath = std::string(m_mtlBaseDir) + matId; + } else { + filepath = matId; + } + + std::ifstream matIStream(filepath.c_str()); + if (!matIStream) { + std::stringstream ss; + ss << "Material file [ " << filepath << " ] not found." << std::endl; + if (warn) { + (*warn) += ss.str(); + } + return false; + } + + LoadMtl(matMap, materials, &matIStream, warn, err); + + return true; +} + +bool MaterialStreamReader::operator()(const std::string &matId, + std::vector *materials, + std::map *matMap, + std::string *warn, std::string *err) { + (void)err; + (void)matId; + if (!m_inStream) { + std::stringstream ss; + ss << "Material stream in error state. " << std::endl; + if (warn) { + (*warn) += ss.str(); + } + return false; + } + + LoadMtl(matMap, materials, &m_inStream, warn, err); + + return true; +} + +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, const char *filename, const char *mtl_basedir, + bool trianglulate, bool default_vcols_fallback) { + attrib->vertices.clear(); + attrib->normals.clear(); + attrib->texcoords.clear(); + attrib->colors.clear(); + shapes->clear(); + + std::stringstream errss; + + std::ifstream ifs(filename); + if (!ifs) { + errss << "Cannot open file [" << filename << "]" << std::endl; + if (err) { + (*err) = errss.str(); + } + return false; + } + + std::string baseDir = mtl_basedir ? mtl_basedir : ""; + if (!baseDir.empty()) { +#ifndef _WIN32 + const char dirsep = '/'; +#else + const char dirsep = '\\'; +#endif + if (baseDir[baseDir.length() - 1] != dirsep) baseDir += dirsep; + } + MaterialFileReader matFileReader(baseDir); + + return LoadObj(attrib, shapes, materials, warn, err, &ifs, &matFileReader, + trianglulate, default_vcols_fallback); +} + +bool LoadObj(attrib_t *attrib, std::vector *shapes, + std::vector *materials, std::string *warn, + std::string *err, std::istream *inStream, + MaterialReader *readMatFn /*= NULL*/, bool triangulate, + bool default_vcols_fallback) { + std::stringstream errss; + + std::vector v; + std::vector vn; + std::vector vt; + std::vector vc; + std::vector tags; + std::vector faceGroup; + std::vector lineGroup; + std::string name; + + // material + std::map material_map; + int material = -1; + + // smoothing group id + unsigned int current_smoothing_id = + 0; // Initial value. 0 means no smoothing. + + int greatest_v_idx = -1; + int greatest_vn_idx = -1; + int greatest_vt_idx = -1; + + shape_t shape; + + bool found_all_colors = true; + + size_t line_num = 0; + std::string linebuf; + while (inStream->peek() != -1) { + safeGetline(*inStream, linebuf); + + line_num++; + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // vertex + if (token[0] == 'v' && IS_SPACE((token[1]))) { + token += 2; + real_t x, y, z; + real_t r, g, b; + + found_all_colors &= parseVertexWithColor(&x, &y, &z, &r, &g, &b, &token); + + v.push_back(x); + v.push_back(y); + v.push_back(z); + + if (found_all_colors || default_vcols_fallback) { + vc.push_back(r); + vc.push_back(g); + vc.push_back(b); + } + + continue; + } + + // normal + if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; + parseReal3(&x, &y, &z, &token); + vn.push_back(x); + vn.push_back(y); + vn.push_back(z); + continue; + } + + // texcoord + if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y; + parseReal2(&x, &y, &token); + vt.push_back(x); + vt.push_back(y); + continue; + } + + // line + if (token[0] == 'l' && IS_SPACE((token[1]))) { + token += 2; + + line_t line_cache; + bool end_line_bit = 0; + while (!IS_NEW_LINE(token[0])) { + // get index from string + int idx; + fixIndex(parseInt(&token), 0, &idx); + + size_t n = strspn(token, " \t\r"); + token += n; + + if (!end_line_bit) { + line_cache.idx0 = idx; + } else { + line_cache.idx1 = idx; + lineGroup.push_back(line_cache.idx0); + lineGroup.push_back(line_cache.idx1); + line_cache = line_t(); + } + end_line_bit = !end_line_bit; + } + + continue; + } + // face + if (token[0] == 'f' && IS_SPACE((token[1]))) { + token += 2; + token += strspn(token, " \t"); + + face_t face; + + face.smoothing_group_id = current_smoothing_id; + face.vertex_indices.reserve(3); + + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi; + if (!parseTriple(&token, static_cast(v.size() / 3), + static_cast(vn.size() / 3), + static_cast(vt.size() / 2), &vi)) { + if (err) { + std::stringstream ss; + ss << "Failed parse `f' line(e.g. zero value for face index. line " + << line_num << ".)\n"; + (*err) += ss.str(); + } + return false; + } + + greatest_v_idx = greatest_v_idx > vi.v_idx ? greatest_v_idx : vi.v_idx; + greatest_vn_idx = + greatest_vn_idx > vi.vn_idx ? greatest_vn_idx : vi.vn_idx; + greatest_vt_idx = + greatest_vt_idx > vi.vt_idx ? greatest_vt_idx : vi.vt_idx; + + face.vertex_indices.push_back(vi); + size_t n = strspn(token, " \t\r"); + token += n; + } + + // replace with emplace_back + std::move on C++11 + faceGroup.push_back(face); + + continue; + } + + // use mtl + if ((0 == strncmp(token, "usemtl", 6)) && IS_SPACE((token[6]))) { + token += 7; + std::stringstream ss; + ss << token; + std::string namebuf = ss.str(); + + int newMaterialId = -1; + if (material_map.find(namebuf) != material_map.end()) { + newMaterialId = material_map[namebuf]; + } else { + // { error!! material not found } + } + + if (newMaterialId != material) { + // Create per-face material. Thus we don't add `shape` to `shapes` at + // this time. + // just clear `faceGroup` after `exportGroupsToShape()` call. + exportGroupsToShape(&shape, faceGroup, lineGroup, tags, material, name, + triangulate, v); + faceGroup.clear(); + material = newMaterialId; + } + + continue; + } + + // load mtl + if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { + if (readMatFn) { + token += 7; + + std::vector filenames; + SplitString(std::string(token), ' ', filenames); + + if (filenames.empty()) { + if (warn) { + std::stringstream ss; + ss << "Looks like empty filename for mtllib. Use default " + "material (line " + << line_num << ".)\n"; + + (*warn) += ss.str(); + } + } else { + bool found = false; + for (size_t s = 0; s < filenames.size(); s++) { + std::string warn_mtl; + std::string err_mtl; + bool ok = (*readMatFn)(filenames[s].c_str(), materials, + &material_map, &warn_mtl, &err_mtl); + if (warn && (!warn_mtl.empty())) { + (*warn) += warn_mtl; + } + + if (err && (!err_mtl.empty())) { + (*err) += err_mtl; + } + + if (ok) { + found = true; + break; + } + } + + if (!found) { + if (warn) { + (*warn) += + "Failed to load material file(s). Use default " + "material.\n"; + } + } + } + } + + continue; + } + + // group name + if (token[0] == 'g' && IS_SPACE((token[1]))) { + // flush previous face group. + bool ret = exportGroupsToShape(&shape, faceGroup, lineGroup, tags, + material, name, triangulate, v); + (void)ret; // return value not used. + + if (shape.mesh.indices.size() > 0) { + shapes->push_back(shape); + } + + shape = shape_t(); + + // material = -1; + faceGroup.clear(); + + std::vector names; + + while (!IS_NEW_LINE(token[0])) { + std::string str = parseString(&token); + names.push_back(str); + token += strspn(token, " \t\r"); // skip tag + } + + // names[0] must be 'g' + + if (names.size() < 2) { + // 'g' with empty names + if (warn) { + std::stringstream ss; + ss << "Empty group name. line: " << line_num << "\n"; + (*warn) += ss.str(); + name = ""; + } + } else { + std::stringstream ss; + ss << names[1]; + + // tinyobjloader does not support multiple groups for a primitive. + // Currently we concatinate multiple group names with a space to get + // single group name. + + for (size_t i = 2; i < names.size(); i++) { + ss << " " << names[i]; + } + + name = ss.str(); + } + + continue; + } + + // object name + if (token[0] == 'o' && IS_SPACE((token[1]))) { + // flush previous face group. + bool ret = exportGroupsToShape(&shape, faceGroup, lineGroup, tags, + material, name, triangulate, v); + if (ret) { + shapes->push_back(shape); + } + + // material = -1; + faceGroup.clear(); + shape = shape_t(); + + // @todo { multiple object name? } + token += 2; + std::stringstream ss; + ss << token; + name = ss.str(); + + continue; + } + + if (token[0] == 't' && IS_SPACE(token[1])) { + const int max_tag_nums = 8192; // FIXME(syoyo): Parameterize. + tag_t tag; + + token += 2; + + tag.name = parseString(&token); + + tag_sizes ts = parseTagTriple(&token); + + if (ts.num_ints < 0) { + ts.num_ints = 0; + } + if (ts.num_ints > max_tag_nums) { + ts.num_ints = max_tag_nums; + } + + if (ts.num_reals < 0) { + ts.num_reals = 0; + } + if (ts.num_reals > max_tag_nums) { + ts.num_reals = max_tag_nums; + } + + if (ts.num_strings < 0) { + ts.num_strings = 0; + } + if (ts.num_strings > max_tag_nums) { + ts.num_strings = max_tag_nums; + } + + tag.intValues.resize(static_cast(ts.num_ints)); + + for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { + tag.intValues[i] = parseInt(&token); + } + + tag.floatValues.resize(static_cast(ts.num_reals)); + for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { + tag.floatValues[i] = parseReal(&token); + } + + tag.stringValues.resize(static_cast(ts.num_strings)); + for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { + tag.stringValues[i] = parseString(&token); + } + + tags.push_back(tag); + + continue; + } + + if (token[0] == 's' && IS_SPACE(token[1])) { + // smoothing group id + token += 2; + + // skip space. + token += strspn(token, " \t"); // skip space + + if (token[0] == '\0') { + continue; + } + + if (token[0] == '\r' || token[1] == '\n') { + continue; + } + + if (strlen(token) >= 3) { + if (token[0] == 'o' && token[1] == 'f' && token[2] == 'f') { + current_smoothing_id = 0; + } + } else { + // assume number + int smGroupId = parseInt(&token); + if (smGroupId < 0) { + // parse error. force set to 0. + // FIXME(syoyo): Report warning. + current_smoothing_id = 0; + } else { + current_smoothing_id = static_cast(smGroupId); + } + } + + continue; + } // smoothing group id + + // Ignore unknown command. + } + + // not all vertices have colors, no default colors desired? -> clear colors + if (!found_all_colors && !default_vcols_fallback) { + vc.clear(); + } + + if (greatest_v_idx >= static_cast(v.size() / 3)) { + if (warn) { + std::stringstream ss; + ss << "Vertex indices out of bounds (line " << line_num << ".)\n" + << std::endl; + (*warn) += ss.str(); + } + } + if (greatest_vn_idx >= static_cast(vn.size() / 3)) { + if (warn) { + std::stringstream ss; + ss << "Vertex normal indices out of bounds (line " << line_num << ".)\n" + << std::endl; + (*warn) += ss.str(); + } + } + if (greatest_vt_idx >= static_cast(vt.size() / 2)) { + if (warn) { + std::stringstream ss; + ss << "Vertex texcoord indices out of bounds (line " << line_num << ".)\n" + << std::endl; + (*warn) += ss.str(); + } + } + + bool ret = exportGroupsToShape(&shape, faceGroup, lineGroup, tags, material, + name, triangulate, v); + // exportGroupsToShape return false when `usemtl` is called in the last + // line. + // we also add `shape` to `shapes` when `shape.mesh` has already some + // faces(indices) + if (ret || shape.mesh.indices.size()) { + shapes->push_back(shape); + } + faceGroup.clear(); // for safety + + if (err) { + (*err) += errss.str(); + } + + attrib->vertices.swap(v); + attrib->normals.swap(vn); + attrib->texcoords.swap(vt); + attrib->colors.swap(vc); + + return true; +} + +bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, + void *user_data /*= NULL*/, + MaterialReader *readMatFn /*= NULL*/, + std::string *warn, /* = NULL*/ + std::string *err /*= NULL*/) { + std::stringstream errss; + + // material + std::map material_map; + int material_id = -1; // -1 = invalid + + std::vector indices; + std::vector materials; + std::vector names; + names.reserve(2); + std::vector names_out; + + std::string linebuf; + while (inStream.peek() != -1) { + safeGetline(inStream, linebuf); + + // Trim newline '\r\n' or '\n' + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\n') + linebuf.erase(linebuf.size() - 1); + } + if (linebuf.size() > 0) { + if (linebuf[linebuf.size() - 1] == '\r') + linebuf.erase(linebuf.size() - 1); + } + + // Skip if empty line. + if (linebuf.empty()) { + continue; + } + + // Skip leading space. + const char *token = linebuf.c_str(); + token += strspn(token, " \t"); + + assert(token); + if (token[0] == '\0') continue; // empty line + + if (token[0] == '#') continue; // comment line + + // vertex + if (token[0] == 'v' && IS_SPACE((token[1]))) { + token += 2; + // TODO(syoyo): Support parsing vertex color extension. + real_t x, y, z, w; // w is optional. default = 1.0 + parseV(&x, &y, &z, &w, &token); + if (callback.vertex_cb) { + callback.vertex_cb(user_data, x, y, z, w); + } + continue; + } + + // normal + if (token[0] == 'v' && token[1] == 'n' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; + parseReal3(&x, &y, &z, &token); + if (callback.normal_cb) { + callback.normal_cb(user_data, x, y, z); + } + continue; + } + + // texcoord + if (token[0] == 'v' && token[1] == 't' && IS_SPACE((token[2]))) { + token += 3; + real_t x, y, z; // y and z are optional. default = 0.0 + parseReal3(&x, &y, &z, &token); + if (callback.texcoord_cb) { + callback.texcoord_cb(user_data, x, y, z); + } + continue; + } + + // face + if (token[0] == 'f' && IS_SPACE((token[1]))) { + token += 2; + token += strspn(token, " \t"); + + indices.clear(); + while (!IS_NEW_LINE(token[0])) { + vertex_index_t vi = parseRawTriple(&token); + + index_t idx; + idx.vertex_index = vi.v_idx; + idx.normal_index = vi.vn_idx; + idx.texcoord_index = vi.vt_idx; + + indices.push_back(idx); + size_t n = strspn(token, " \t\r"); + token += n; + } + + if (callback.index_cb && indices.size() > 0) { + callback.index_cb(user_data, &indices.at(0), + static_cast(indices.size())); + } + + continue; + } + + // use mtl + if ((0 == strncmp(token, "usemtl", 6)) && IS_SPACE((token[6]))) { + token += 7; + std::stringstream ss; + ss << token; + std::string namebuf = ss.str(); + + int newMaterialId = -1; + if (material_map.find(namebuf) != material_map.end()) { + newMaterialId = material_map[namebuf]; + } else { + // { error!! material not found } + } + + if (newMaterialId != material_id) { + material_id = newMaterialId; + } + + if (callback.usemtl_cb) { + callback.usemtl_cb(user_data, namebuf.c_str(), material_id); + } + + continue; + } + + // load mtl + if ((0 == strncmp(token, "mtllib", 6)) && IS_SPACE((token[6]))) { + if (readMatFn) { + token += 7; + + std::vector filenames; + SplitString(std::string(token), ' ', filenames); + + if (filenames.empty()) { + if (warn) { + (*warn) += + "Looks like empty filename for mtllib. Use default " + "material. \n"; + } + } else { + bool found = false; + for (size_t s = 0; s < filenames.size(); s++) { + std::string warn_mtl; + std::string err_mtl; + bool ok = (*readMatFn)(filenames[s].c_str(), &materials, + &material_map, &warn_mtl, &err_mtl); + + if (warn && (!warn_mtl.empty())) { + (*warn) += warn_mtl; // This should be warn message. + } + + if (err && (!err_mtl.empty())) { + (*err) += err_mtl; + } + + if (ok) { + found = true; + break; + } + } + + if (!found) { + if (warn) { + (*warn) += + "Failed to load material file(s). Use default " + "material.\n"; + } + } else { + if (callback.mtllib_cb) { + callback.mtllib_cb(user_data, &materials.at(0), + static_cast(materials.size())); + } + } + } + } + + continue; + } + + // group name + if (token[0] == 'g' && IS_SPACE((token[1]))) { + names.clear(); + + while (!IS_NEW_LINE(token[0])) { + std::string str = parseString(&token); + names.push_back(str); + token += strspn(token, " \t\r"); // skip tag + } + + assert(names.size() > 0); + + if (callback.group_cb) { + if (names.size() > 1) { + // create const char* array. + names_out.resize(names.size() - 1); + for (size_t j = 0; j < names_out.size(); j++) { + names_out[j] = names[j + 1].c_str(); + } + callback.group_cb(user_data, &names_out.at(0), + static_cast(names_out.size())); + + } else { + callback.group_cb(user_data, NULL, 0); + } + } + + continue; + } + + // object name + if (token[0] == 'o' && IS_SPACE((token[1]))) { + // @todo { multiple object name? } + token += 2; + + std::stringstream ss; + ss << token; + std::string object_name = ss.str(); + + if (callback.object_cb) { + callback.object_cb(user_data, object_name.c_str()); + } + + continue; + } + +#if 0 // @todo + if (token[0] == 't' && IS_SPACE(token[1])) { + tag_t tag; + + token += 2; + std::stringstream ss; + ss << token; + tag.name = ss.str(); + + token += tag.name.size() + 1; + + tag_sizes ts = parseTagTriple(&token); + + tag.intValues.resize(static_cast(ts.num_ints)); + + for (size_t i = 0; i < static_cast(ts.num_ints); ++i) { + tag.intValues[i] = atoi(token); + token += strcspn(token, "/ \t\r") + 1; + } + + tag.floatValues.resize(static_cast(ts.num_reals)); + for (size_t i = 0; i < static_cast(ts.num_reals); ++i) { + tag.floatValues[i] = parseReal(&token); + token += strcspn(token, "/ \t\r") + 1; + } + + tag.stringValues.resize(static_cast(ts.num_strings)); + for (size_t i = 0; i < static_cast(ts.num_strings); ++i) { + std::stringstream ss; + ss << token; + tag.stringValues[i] = ss.str(); + token += tag.stringValues[i].size() + 1; + } + + tags.push_back(tag); + } +#endif + + // Ignore unknown command. + } + + if (err) { + (*err) += errss.str(); + } + + return true; +} + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif +} // namespace tinyobj + +#endif diff --git a/src/main.cpp b/src/main.cpp index 4f6e7a7..bedf5c6 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -7,7 +7,7 @@ // #include // Custom includes -#define OBJL_IMPLIMENTATION +#define TINYOBJLOADER_IMPLEMENTATION #define LOGGER_DEFINITION #include diff --git a/src/mesh.cpp b/src/mesh.cpp index c0b16d0..e109508 100644 --- a/src/mesh.cpp +++ b/src/mesh.cpp @@ -6,8 +6,8 @@ Mesh::Mesh() { Mesh::Mesh(std::string objPath) { Logger logger; - objl::Loader loader; - bool canLoad = loader.LoadFile(objPath); + // objl::Loader loader; + // bool canLoad = loader.LoadFile(objPath); if (!canLoad) { logger << LOGGER_ERROR << "Cannot load obj '" << objPath << "'" << LOGGER_ENDL; @@ -16,17 +16,17 @@ Mesh::Mesh(std::string objPath) { logger << LOGGER_INFO << "Loaded: " << objPath << LOGGER_ENDL; - loadFromObj(loader.LoadedMeshes[0]); + // loadFromObj(loader.LoadedMeshes[0]); } Mesh::Mesh(objl::Mesh objMesh) { - loadFromObj(objMesh); + // loadFromObj(objMesh); } void Mesh::loadFromObj(objl::Mesh objMesh) { - OBJLtoGLM(objMesh.Vertices, vertices, normals, texCoords); - indices = objMesh.Indices; - name = objMesh.MeshName; + // OBJLtoGLM(objMesh.Vertices, vertices, normals, texCoords); + // indices = objMesh.Indices; + // name = objMesh.MeshName; //Logger logger; //for (int i = 0; i < 100; i++) { diff --git a/src/mesh.h b/src/mesh.h index 97ed9af..88b7394 100644 --- a/src/mesh.h +++ b/src/mesh.h @@ -10,7 +10,7 @@ #include #include -#include +#include // #include #include