Fix build on MSC + CXX11 codepath.

Bugfix for multiple texture

experimental/tinyobj_loader_opt.h

@@ -1440,7 +1440,9 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     // std::cout << "mtllib :" << material_filename << std::endl;
 
     auto t1 = std::chrono::high_resolution_clock::now();
-
+	if (material_filename.back() == '\r') {
+			material_filename.pop_back();
+	}
     std::ifstream ifs(material_filename);
     if (ifs.good()) {
       LoadMtl(&material_map, materials, &ifs);
@@ -1516,13 +1518,13 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     StackVector<std::thread, 16> workers;
 
     for (size_t t = 0; t < num_threads; t++) {
-      int material_id = -1;  // -1 = default unknown material.
       workers->push_back(std::thread([&, t]() {
         size_t v_count = v_offsets[t];
         size_t n_count = n_offsets[t];
         size_t t_count = t_offsets[t];
         size_t f_count = f_offsets[t];
         size_t face_count = face_offsets[t];
+		int material_id = -1;  // -1 = default unknown material.
 
         for (size_t i = 0; i < commands[t].size(); i++) {
           if (commands[t][i].type == COMMAND_EMPTY) {
@@ -1579,7 +1581,19 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     for (size_t t = 0; t < workers->size(); t++) {
       workers[t].join();
     }
-
+	if(material_map.size()>1&& num_threads>1) {
+			for (size_t t = 0; t < num_threads; t++) {
+				size_t face_count = face_offsets[t];
+				if (-1 == attrib->material_ids[face_count]) {
+					int prev_material_id = attrib->material_ids[face_count - 1];
+					size_t max_face_offset = (t == num_threads - 1) ? attrib->material_ids.size() : face_offsets[t + 1];
+					for (int i = face_count; i<max_face_offset; ++i) {
+						if (attrib->material_ids[i] != -1) break;
+						attrib->material_ids[i] = prev_material_id;
+					}
+				}
+			}
+	}
     auto t_end = std::chrono::high_resolution_clock::now();
     ms_merge = t_end - t_start;
   }

loader_example.cc

@@ -29,6 +29,13 @@ extern "C" {
 #endif
 #endif
 
+#ifdef TINYOBJ_USE_CXX11
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+#endif
+
 class timerutil {
  public:
 #ifdef _WIN32
@@ -63,7 +70,7 @@ class timerutil {
   }
   time_t current() {
     struct timeval t;
-    gettimeofday(&t, NULL);
+    gettimeofday(&t, tobj_null);
     return static_cast<time_t>(t.tv_sec * 1000 + t.tv_usec);
   }
 
@@ -261,7 +268,7 @@ static void PrintInfo(const tinyobj::attrib_t& attrib,
   }
 }
 
-static bool TestLoadObj(const char* filename, const char* basepath = NULL,
+static bool TestLoadObj(const char* filename, const char* basepath = tobj_null,
                         bool triangulate = true) {
   std::cout << "Loading " << filename << std::endl;
 

tiny_obj_loader.h

@@ -51,6 +51,32 @@ THE SOFTWARE.
 
 namespace tinyobj {
 
+//
+// Please define `TINYOBJ_USE_CXX11` flag when you compile tinyobjloader with C++11 compiler.
+//
+#ifdef TINYOBJ_USE_CXX11
+#if defined(_MSC_VER)
+#  if _MSC_VER < 1800
+#    error This project needs at least Visual Studio 2013
+#  endif
+#define tobj_null nullptr
+#elif __cplusplus <= 199711L
+#  error This project can only be compiled with a compiler that supports C++11
+#else
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+
+#define tobj_null nullptr
+
+#endif
+#else // !TINYOBJ_USE_CXX11
+#define tobj_null NULL
+#endif
+
+
 // https://en.wikipedia.org/wiki/Wavefront_.obj_file says ...
 //
 //  -blendu on | off                       # set horizontal texture blending
@@ -259,14 +285,14 @@ typedef struct callback_t_ {
   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) {}
+      : vertex_cb(tobj_null),
+        normal_cb(tobj_null),
+        texcoord_cb(tobj_null),
+        index_cb(tobj_null),
+        usemtl_cb(tobj_null),
+        mtllib_cb(tobj_null),
+        group_cb(tobj_null),
+        object_cb(tobj_null) {}
 } callback_t;
 
 class MaterialReader {
@@ -318,7 +344,7 @@ class MaterialStreamReader : public MaterialReader {
 /// or not.
 bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
              std::vector<material_t> *materials, std::string *err,
-             const char *filename, const char *mtl_basedir = NULL,
+             const char *filename, const char *mtl_basedir = tobj_null,
              bool triangulate = true);
 
 /// Loads .obj from a file with custom user callback.
@@ -328,9 +354,9 @@ bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
 /// Returns warning 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 *err = NULL);
+                         void *user_data = tobj_null,
+                         MaterialReader *readMatFn = tobj_null,
+                         std::string *err = tobj_null);
 
 /// Loads object from a std::istream, uses GetMtlIStreamFn to retrieve
 /// std::istream for materials.
@@ -338,7 +364,7 @@ bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,
 /// Returns warning and error message into `err`
 bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes,
              std::vector<material_t> *materials, std::string *err,
-             std::istream *inStream, MaterialReader *readMatFn = NULL,
+             std::istream *inStream, MaterialReader *readMatFn = tobj_null,
              bool triangulate = true);
 
 /// Loads materials into std::map
@@ -348,6 +374,10 @@ void LoadMtl(std::map<std::string, int> *material_map,
 
 }  // namespace tinyobj
 
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
 #endif  // TINY_OBJ_LOADER_H_
 
 #ifdef TINYOBJLOADER_IMPLEMENTATION
@@ -364,6 +394,13 @@ void LoadMtl(std::map<std::string, int> *material_map,
 
 namespace tinyobj {
 
+#ifdef TINYOBJ_USE_CXX11
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wc++98-compat"
+#endif
+#endif
+
 MaterialReader::~MaterialReader() {}
 
 struct vertex_index {
@@ -2030,7 +2067,7 @@ bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,
                             static_cast<int>(names_out.size()));
 
         } else {
-          callback.group_cb(user_data, NULL, 0);
+          callback.group_cb(user_data, tobj_null, 0);
         }
       }
 
@@ -2100,6 +2137,11 @@ bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback,
 
   return true;
 }
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
 }  // namespace tinyobj
 
 #endif