Merge branch 'master' into ios-build-script

code/BaseImporter.cpp

@@ -143,7 +143,8 @@ void BaseImporter::GetExtensionList(std::set<std::string>& extensions) {
     const char**        tokens,
     unsigned int        numTokens,
     unsigned int        searchBytes /* = 200 */,
-    bool                tokensSol /* false */)
+    bool                tokensSol /* false */,
+    bool                noAlphaBeforeTokens /* false */)
 {
     ai_assert( nullptr != tokens );
     ai_assert( 0 != numTokens );
@@ -193,6 +194,11 @@ void BaseImporter::GetExtensionList(std::set<std::string>& extensions) {
             if( !r ) {
                 continue;
             }
+            // We need to make sure that we didn't accidentially identify the end of another token as our token,
+            // e.g. in a previous version the "gltf " present in some gltf files was detected as "f "
+            if (noAlphaBeforeTokens && (r != buffer && isalpha(r[-1]))) {
+                continue;
+            }
             // We got a match, either we don't care where it is, or it happens to
             // be in the beginning of the file / line
             if (!tokensSol || r == buffer || r[-1] == '\r' || r[-1] == '\n') {

code/ObjFileImporter.cpp

@@ -100,7 +100,7 @@ bool ObjFileImporter::CanRead( const std::string& pFile, IOSystem*  pIOHandler ,
     } else {
         // Check file Header
         static const char *pTokens[] = { "mtllib", "usemtl", "v ", "vt ", "vn ", "o ", "g ", "s ", "f " };
-        return BaseImporter::SearchFileHeaderForToken(pIOHandler, pFile, pTokens, 9 );
+        return BaseImporter::SearchFileHeaderForToken(pIOHandler, pFile, pTokens, 9, 200, false, true );
     }
 }
 

code/PostStepRegistry.cpp

@@ -164,9 +164,6 @@ void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out)
 #if (!defined ASSIMP_BUILD_NO_OPTIMIZEGRAPH_PROCESS)
     out.push_back( new OptimizeGraphProcess());
 #endif
-#if (!defined ASSIMP_BUILD_NO_FINDDEGENERATES_PROCESS)
-    out.push_back( new FindDegeneratesProcess());
-#endif
 #ifndef ASSIMP_BUILD_NO_GENUVCOORDS_PROCESS
     out.push_back( new ComputeUVMappingProcess());
 #endif
@@ -179,6 +176,12 @@ void GetPostProcessingStepInstanceList(std::vector< BaseProcess* >& out)
 #if (!defined ASSIMP_BUILD_NO_TRIANGULATE_PROCESS)
     out.push_back( new TriangulateProcess());
 #endif
+#if (!defined ASSIMP_BUILD_NO_FINDDEGENERATES_PROCESS)
+    //find degenerates should run after triangulation (to sort out small
+    //generated triangles) but before sort by p types (in case there are lines
+    //and points generated and inserted into a mesh)
+    out.push_back( new FindDegeneratesProcess());
+#endif
 #if (!defined ASSIMP_BUILD_NO_SORTBYPTYPE_PROCESS)
     out.push_back( new SortByPTypeProcess());
 #endif

code/TriangulateProcess.cpp

@@ -487,21 +487,22 @@ bool TriangulateProcess::TriangulateMesh( aiMesh* pMesh)
         for(aiFace* f = last_face; f != curOut; ) {
             unsigned int* i = f->mIndices;
 
-            //  drop dumb 0-area triangles
-            if (std::fabs(GetArea2D(temp_verts[i[0]],temp_verts[i[1]],temp_verts[i[2]])) < 1e-5f) {
-                ASSIMP_LOG_DEBUG("Dropping triangle with area 0");
-                --curOut;
+            //  drop dumb 0-area triangles - deactivated for now:
+            //FindDegenerates post processing step can do the same thing
+            //if (std::fabs(GetArea2D(temp_verts[i[0]],temp_verts[i[1]],temp_verts[i[2]])) < 1e-5f) {
+            //    ASSIMP_LOG_DEBUG("Dropping triangle with area 0");
+            //    --curOut;
 
-                delete[] f->mIndices;
-                f->mIndices = NULL;
+            //    delete[] f->mIndices;
+            //    f->mIndices = nullptr;
 
-                for(aiFace* ff = f; ff != curOut; ++ff) {
-                    ff->mNumIndices = (ff+1)->mNumIndices;
-                    ff->mIndices = (ff+1)->mIndices;
-                    (ff+1)->mIndices = NULL;
-                }
-                continue;
-            }
+            //    for(aiFace* ff = f; ff != curOut; ++ff) {
+            //        ff->mNumIndices = (ff+1)->mNumIndices;
+            //        ff->mIndices = (ff+1)->mIndices;
+            //        (ff+1)->mIndices = nullptr;
+            //    }
+            //    continue;
+            //}
 
             i[0] = idx[i[0]];
             i[1] = idx[i[1]];

include/assimp/BaseImporter.h

@@ -244,7 +244,8 @@ public: // static utilities
         const char** tokens,
         unsigned int numTokens,
         unsigned int searchBytes = 200,
-        bool tokensSol = false);
+        bool tokensSol = false,
+        bool noAlphaBeforeTokens = false);
 
     // -------------------------------------------------------------------
     /** @brief Check whether a file has a specific file extension