Merge pull request #136 from KaoCC/v0.9.x

remove the keyword `register' for C++17

README.md

@@ -17,10 +17,17 @@ Tiny but powerful single file wavefront obj loader written in C++. No dependency
 
 `tinyobjloader` is good for embedding .obj loader to your (global illumination) renderer ;-)
 
+Notice!
+-------
+
+`master` branch will be replaced with `develop` branch in the near future: https://github.com/syoyo/tinyobjloader/tree/develop
+`develop` branch has more better support and clean API interface for loading .obj and also it has optimized multi-threaded parser(probably 10x faster than `master`). If you are new to use `TinyObjLoader`, I highly recommend to use `develop` branch.
+
 
 What's new
 ----------
 
+* Mar 13, 2016 : Introduce `load_flag_t` and flat normal calculation flag! Thanks Vazquinhos!
 * Jan 29, 2016 : Support n-polygon(no triangulation) and OpenSubdiv crease tag! Thanks dboogert!
 * Nov 26, 2015 : Now single-header only!.
 * Nov 08, 2015 : Improved API.
@@ -60,6 +67,12 @@ TinyObjLoader is successfully used in ...
 * pbrt-v3 https://github.com/mmp/pbrt-v3
 * cocos2d-x https://github.com/cocos2d/cocos2d-x/
 * Android Vulkan demo https://github.com/SaschaWillems/Vulkan
+* voxelizer https://github.com/karimnaaji/voxelizer
+* Probulator https://github.com/kayru/Probulator
+* OptiX Prime baking https://github.com/nvpro-samples/optix_prime_baking
+* FireRays SDK https://github.com/GPUOpen-LibrariesAndSDKs/FireRays_SDK
+* parg, tiny C library of various graphics utilities and GL demos https://github.com/prideout/parg
+* Opengl unit of ChronoEngine https://github.com/projectchrono/chrono-opengl
 * Your project here!
 
 Features
@@ -163,8 +176,8 @@ std::vector<tinyobj::shape_t> shapes;
 std::vector<tinyobj::material_t> materials;
   
 std::string err;
-bool triangulate = false;
-bool ret = tinyobj::LoadObj(shapes, materials, err, inputfile.c_str(), triangulate);
+int flags = 1; // see load_flags_t enum for more information.
+bool ret = tinyobj::LoadObj(shapes, materials, err, inputfile.c_str(), flags);
   
 if (!err.empty()) { // `err` may contain warning message.
   std::cerr << err << std::endl;

test.cc

@@ -8,6 +8,90 @@
 #include <sstream>
 #include <fstream>
 
+#ifdef _WIN32
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <windows.h>
+#include <mmsystem.h>
+#ifdef __cplusplus
+}
+#endif
+#pragma comment(lib, "winmm.lib")
+#else
+#if defined(__unix__) || defined(__APPLE__)
+#include <sys/time.h>
+#else
+#include <ctime>
+#endif
+#endif
+
+// not thread-safe 
+class timerutil {
+public:
+#ifdef _WIN32
+  typedef DWORD time_t;
+
+  timerutil() { ::timeBeginPeriod(1); }
+  ~timerutil() { ::timeEndPeriod(1); }
+
+  void start() { t_[0] = ::timeGetTime(); }
+  void end() { t_[1] = ::timeGetTime(); }
+
+  time_t sec() { return (time_t)((t_[1] - t_[0]) / 1000); }
+  time_t msec() { return (time_t)((t_[1] - t_[0])); }
+  time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000); }
+  time_t current() { return ::timeGetTime(); }
+
+#else
+#if defined(__unix__) || defined(__APPLE__)
+  typedef unsigned long int time_t;
+
+  void start() { gettimeofday(tv + 0, &tz); }
+  void end() { gettimeofday(tv + 1, &tz); }
+
+  time_t sec() { return (time_t)(tv[1].tv_sec - tv[0].tv_sec); }
+  time_t msec() {
+    return this->sec() * 1000 +
+           (time_t)((tv[1].tv_usec - tv[0].tv_usec) / 1000);
+  }
+  time_t usec() {
+    return this->sec() * 1000000 + (time_t)(tv[1].tv_usec - tv[0].tv_usec);
+  }
+  time_t current() {
+    struct timeval t;
+    gettimeofday(&t, NULL);
+    return (time_t)(t.tv_sec * 1000 + t.tv_usec);
+  }
+
+#else // C timer
+  // using namespace std;
+  typedef clock_t time_t;
+
+  void start() { t_[0] = clock(); }
+  void end() { t_[1] = clock(); }
+
+  time_t sec() { return (time_t)((t_[1] - t_[0]) / CLOCKS_PER_SEC); }
+  time_t msec() { return (time_t)((t_[1] - t_[0]) * 1000 / CLOCKS_PER_SEC); }
+  time_t usec() { return (time_t)((t_[1] - t_[0]) * 1000000 / CLOCKS_PER_SEC); }
+  time_t current() { return (time_t)clock(); }
+
+#endif
+#endif
+
+private:
+#ifdef _WIN32
+  DWORD t_[2];
+#else
+#if defined(__unix__) || defined(__APPLE__)
+  struct timeval tv[2];
+  struct timezone tz;
+#else
+  time_t t_[2];
+#endif
+#endif
+};
+
 static void PrintInfo(const std::vector<tinyobj::shape_t>& shapes, const std::vector<tinyobj::material_t>& materials, bool triangulate = true)
 {
   std::cout << "# of shapes    : " << shapes.size() << std::endl;
@@ -124,15 +208,18 @@ static bool
 TestLoadObj(
   const char* filename,
   const char* basepath = NULL,
-  bool triangulate = true)
+  unsigned int flags = 1 )
 {
   std::cout << "Loading " << filename << std::endl;
 
   std::vector<tinyobj::shape_t> shapes;
   std::vector<tinyobj::material_t> materials;
 
+  timerutil t;
+  t.start();
   std::string err;
-  bool ret = tinyobj::LoadObj(shapes, materials, err, filename, basepath, triangulate);
+  bool ret = tinyobj::LoadObj(shapes, materials, err, filename, basepath, flags);
+  t.end();
 
   if (!err.empty()) {
     std::cerr << err << std::endl;
@@ -143,7 +230,10 @@ TestLoadObj(
     return false;
   }
 
-  PrintInfo(shapes, materials, triangulate);
+  printf("Parse time: %lu [msecs]\n", t.msec());
+
+  bool triangulate( ( flags & tinyobj::triangulation ) == tinyobj::triangulation );
+  PrintInfo(shapes, materials, triangulate );
 
   return true;
 }
@@ -212,7 +302,8 @@ std::string matStream(
     "newmtl light\n"
     "Ka 20 20 20\n"
     "Kd 1 1 1\n"
-    "Ks 0 0 0");
+    "Ks 0 0 0\n"
+    "map_Kd tmp.png \n"); // #92(whitespace after filename)
 
     using namespace tinyobj;
     class MaterialStringStreamReader:
@@ -253,6 +344,13 @@ std::string matStream(
 
   PrintInfo(shapes, materials);
 
+  // #92
+  for (size_t i = 0; i < materials.size(); i++) {
+    if (materials[i].name.compare("light") == 0) {
+      assert(materials[i].diffuse_texname.compare("tmp.png") == 0);
+    }
+  }
+    
   return true;
 }
 
@@ -271,7 +369,7 @@ main(
     //assert(true == TestLoadObj("cornell_box.obj"));
     //assert(true == TestLoadObj("cube.obj"));
     assert(true == TestStreamLoadObj());
-    assert(true == TestLoadObj("catmark_torus_creases0.obj", NULL, false));
+    assert(true == TestLoadObj("catmark_torus_creases0.obj", NULL,  0));
   }
 
   return 0;

tiny_obj_loader.h

@@ -1,10 +1,11 @@
 //
-// Copyright 2012-2015, Syoyo Fujita.
+// Copyright 2012-2016, Syoyo Fujita.
 //
 // Licensed under 2-clause BSD license.
 //
 
 //
+// version 0.9.22: Introduce `load_flags_t`.
 // version 0.9.20: Fixes creating per-face material using `usemtl`(#68)
 // version 0.9.17: Support n-polygon and crease tag(OpenSubdiv extension)
 // version 0.9.16: Make tinyobjloader header-only
@@ -41,9 +42,10 @@
 #ifndef TINY_OBJ_LOADER_H_
 #define TINY_OBJ_LOADER_H_
 
+#include <cmath>
+#include <map>
 #include <string>
 #include <vector>
-#include <map>
 
 namespace tinyobj {
 
@@ -97,6 +99,52 @@ typedef struct {
   mesh_t mesh;
 } shape_t;
 
+typedef enum {
+  triangulation = 1, // used whether triangulate polygon face in .obj
+  calculate_normals =
+      2, // used whether calculate the normals if the .obj normals are empty
+  // Some nice stuff here
+} load_flags_t;
+
+class float3 {
+public:
+  float3() : x(0.0f), y(0.0f), z(0.0f) {}
+
+  float3(float coord_x, float coord_y, float coord_z)
+      : x(coord_x), y(coord_y), z(coord_z) {}
+
+  float3(const float3 &from, const float3 &to) {
+    coord[0] = to.coord[0] - from.coord[0];
+    coord[1] = to.coord[1] - from.coord[1];
+    coord[2] = to.coord[2] - from.coord[2];
+  }
+
+  float3 crossproduct(const float3 &vec) {
+    float a = y * vec.z - z * vec.y;
+    float b = z * vec.x - x * vec.z;
+    float c = x * vec.y - y * vec.x;
+    return float3(a, b, c);
+  }
+
+  void normalize() {
+    const float length = std::sqrt(
+        (coord[0] * coord[0]) + (coord[1] * coord[1]) + (coord[2] * coord[2]));
+    if (length != 1) {
+      coord[0] = (coord[0] / length);
+      coord[1] = (coord[1] / length);
+      coord[2] = (coord[2] / length);
+    }
+  }
+
+private:
+  union {
+    float coord[3];
+    struct {
+      float x, y, z;
+    };
+  };
+};
+
 class MaterialReader {
 public:
   MaterialReader() {}
@@ -127,13 +175,12 @@ private:
 /// Returns true when loading .obj become success.
 /// Returns warning and error message into `err`
 /// 'mtl_basepath' is optional, and used for base path for .mtl file.
-/// 'triangulate' is optional, and used whether triangulate polygon face in .obj
-/// or not.
+/// 'optional flags
 bool LoadObj(std::vector<shape_t> &shapes,       // [output]
              std::vector<material_t> &materials, // [output]
              std::string &err,                   // [output]
              const char *filename, const char *mtl_basepath = NULL,
-             bool triangulate = true);
+             unsigned int flags = 1);
 
 /// Loads object from a std::istream, uses GetMtlIStreamFn to retrieve
 /// std::istream for materials.
@@ -143,7 +190,7 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
              std::vector<material_t> &materials, // [output]
              std::string &err,                   // [output]
              std::istream &inStream, MaterialReader &readMatFn,
-             bool triangulate = true);
+             unsigned int flags = 1);
 
 /// Loads materials into std::map
 void LoadMtl(std::map<std::string, int> &material_map, // [output]
@@ -152,12 +199,12 @@ void LoadMtl(std::map<std::string, int> &material_map, // [output]
 }
 
 #ifdef TINYOBJLOADER_IMPLEMENTATION
-#include <cstdlib>
-#include <cstring>
 #include <cassert>
+#include <cctype>
 #include <cmath>
 #include <cstddef>
-#include <cctype>
+#include <cstdlib>
+#include <cstring>
 
 #include <fstream>
 #include <sstream>
@@ -203,9 +250,43 @@ struct obj_shape {
   std::vector<float> vt;
 };
 
-#define IS_SPACE( x ) ( ( (x) == ' ') || ( (x) == '\t') )
-#define IS_DIGIT( x ) ( (unsigned int)( (x) - '0' ) < (unsigned int)10 )
-#define IS_NEW_LINE( x ) ( ( (x) == '\r') || ( (x) == '\n') || ( (x) == '\0') )
+// See
+// http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf
+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();
+
+  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 += (char)c;
+    }
+  }
+}
+
+#define IS_SPACE(x) (((x) == ' ') || ((x) == '\t'))
+#define IS_DIGIT(x) ((unsigned int)((x) - '0') < (unsigned int)10)
+#define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0'))
 
 // Make index zero-base, and also support relative index.
 static inline int fixIndex(int idx, int n) {
@@ -516,11 +597,14 @@ static bool exportFaceGroupToShape(
     const std::vector<float> &in_texcoords,
     const std::vector<std::vector<vertex_index> > &faceGroup,
     std::vector<tag_t> &tags, const int material_id, const std::string &name,
-    bool clearCache, bool triangulate) {
+    bool clearCache, unsigned int flags, std::string &err) {
   if (faceGroup.empty()) {
     return false;
   }
 
+  bool triangulate((flags & triangulation) == triangulation);
+  bool normals_calculation((flags & calculate_normals) == calculate_normals);
+
   // Flatten vertices and indices
   for (size_t i = 0; i < faceGroup.size(); i++) {
     const std::vector<vertex_index> &face = faceGroup[i];
@@ -571,6 +655,44 @@ static bool exportFaceGroupToShape(
     }
   }
 
+  if (normals_calculation && shape.mesh.normals.empty()) {
+    const size_t nIndexs = shape.mesh.indices.size();
+    if (nIndexs % 3 == 0) {
+      shape.mesh.normals.resize(shape.mesh.positions.size());
+      for (size_t iIndices = 0; iIndices < nIndexs; iIndices += 3) {
+        float3 v1, v2, v3;
+        memcpy(&v1, &shape.mesh.positions[shape.mesh.indices[iIndices] * 3],
+               sizeof(float3));
+        memcpy(&v2, &shape.mesh.positions[shape.mesh.indices[iIndices + 1] * 3],
+               sizeof(float3));
+        memcpy(&v3, &shape.mesh.positions[shape.mesh.indices[iIndices + 2] * 3],
+               sizeof(float3));
+
+        float3 v12(v1, v2);
+        float3 v13(v1, v3);
+
+        float3 normal = v12.crossproduct(v13);
+        normal.normalize();
+
+        memcpy(&shape.mesh.normals[shape.mesh.indices[iIndices] * 3], &normal,
+               sizeof(float3));
+        memcpy(&shape.mesh.normals[shape.mesh.indices[iIndices + 1] * 3],
+               &normal, sizeof(float3));
+        memcpy(&shape.mesh.normals[shape.mesh.indices[iIndices + 2] * 3],
+               &normal, sizeof(float3));
+      }
+    } else {
+
+      std::stringstream ss;
+      ss << "WARN: The shape " << name
+         << " does not have a topology of triangles, therfore the normals "
+            "calculation could not be performed. Select the "
+            "tinyobj::triangulation flag for this object."
+         << std::endl;
+      err += ss.str();
+    }
+  }
+
   shape.name = name;
   shape.mesh.tags.swap(tags);
 
@@ -587,12 +709,14 @@ void LoadMtl(std::map<std::string, int> &material_map,
   material_t material;
   InitMaterial(material);
 
-  size_t maxchars = 8192;          // Alloc enough size.
-  std::vector<char> buf(maxchars); // Alloc enough size.
   while (inStream.peek() != -1) {
-    inStream.getline(&buf[0], static_cast<std::streamsize>(maxchars));
+    std::string linebuf;
+    safeGetline(inStream, linebuf);
 
-    std::string linebuf(&buf[0]);
+    // 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) {
@@ -834,7 +958,7 @@ bool MaterialFileReader::operator()(const std::string &matId,
 bool LoadObj(std::vector<shape_t> &shapes,       // [output]
              std::vector<material_t> &materials, // [output]
              std::string &err, const char *filename, const char *mtl_basepath,
-             bool trianglulate) {
+             unsigned int flags) {
 
   shapes.clear();
 
@@ -853,13 +977,14 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
   }
   MaterialFileReader matFileReader(basePath);
 
-  return LoadObj(shapes, materials, err, ifs, matFileReader, trianglulate);
+  return LoadObj(shapes, materials, err, ifs, matFileReader, flags);
 }
 
 bool LoadObj(std::vector<shape_t> &shapes,       // [output]
              std::vector<material_t> &materials, // [output]
              std::string &err, std::istream &inStream,
-             MaterialReader &readMatFn, bool triangulate) {
+             MaterialReader &readMatFn, unsigned int flags) {
+
   std::stringstream errss;
 
   std::vector<float> v;
@@ -876,12 +1001,9 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
 
   shape_t shape;
 
-  int maxchars = 8192;                                  // Alloc enough size.
-  std::vector<char> buf(static_cast<size_t>(maxchars)); // Alloc enough size.
   while (inStream.peek() != -1) {
-    inStream.getline(&buf[0], maxchars);
-
-    std::string linebuf(&buf[0]);
+    std::string linebuf;
+    safeGetline(inStream, linebuf);
 
     // Trim newline '\r\n' or '\n'
     if (linebuf.size() > 0) {
@@ -986,7 +1108,7 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
       if (newMaterialId != material) {
         // Create per-face material
         exportFaceGroupToShape(shape, vertexCache, v, vn, vt, faceGroup, tags,
-                               material, name, true, triangulate);
+                               material, name, true, flags, err);
         faceGroup.clear();
         material = newMaterialId;
       }
@@ -1022,7 +1144,7 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
       // flush previous face group.
       bool ret =
           exportFaceGroupToShape(shape, vertexCache, v, vn, vt, faceGroup, tags,
-                                 material, name, true, triangulate);
+                                 material, name, true, flags, err);
       if (ret) {
         shapes.push_back(shape);
       }
@@ -1059,7 +1181,7 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
       // flush previous face group.
       bool ret =
           exportFaceGroupToShape(shape, vertexCache, v, vn, vt, faceGroup, tags,
-                                 material, name, true, triangulate);
+                                 material, name, true, flags, err);
       if (ret) {
         shapes.push_back(shape);
       }
@@ -1115,7 +1237,8 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
         char stringValueBuffer[4096];
 
 #ifdef _MSC_VER
-        sscanf_s(token, "%s", stringValueBuffer, (unsigned)_countof(stringValueBuffer));
+        sscanf_s(token, "%s", stringValueBuffer,
+                 (unsigned)_countof(stringValueBuffer));
 #else
         sscanf(token, "%s", stringValueBuffer);
 #endif
@@ -1130,13 +1253,14 @@ bool LoadObj(std::vector<shape_t> &shapes,       // [output]
   }
 
   bool ret = exportFaceGroupToShape(shape, vertexCache, v, vn, vt, faceGroup,
-                                    tags, material, name, true, triangulate);
+                                    tags, material, name, true, flags, err);
   if (ret) {
     shapes.push_back(shape);
   }
   faceGroup.clear(); // for safety
 
   err += errss.str();
+
   return true;
 }