Merge pull request #607 from assimp/feature/fix_issue_121

Obj: fix issue 121 - set group names as the mesh names.

code/ObjFileData.h

@@ -219,10 +219,10 @@ struct Material
 // ------------------------------------------------------------------------------------------------
 //! \struct Mesh
 //! \brief  Data structure to store a mesh
-struct Mesh
-{
+struct Mesh {
     static const unsigned int NoMaterial = ~0u;
-
+    /// The name for the mesh
+    std::string m_name;
     /// Array with pointer to all stored faces
     std::vector<Face*> m_Faces;
     /// Assigned material
@@ -235,13 +235,14 @@ struct Mesh
     unsigned int m_uiMaterialIndex;
     /// True, if normals are stored.
     bool m_hasNormals;
+
     /// Constructor
-    Mesh() :
-        m_pMaterial(NULL),
-        m_uiNumIndices(0),
-        m_uiMaterialIndex( NoMaterial ),
-        m_hasNormals(false)
-    {
+    Mesh( const std::string &name ) 
+    : m_name( name )
+    , m_pMaterial(NULL)
+    , m_uiNumIndices(0)
+    , m_uiMaterialIndex( NoMaterial )
+    , m_hasNormals(false) {
         memset(m_uiUVCoordinates, 0, sizeof( unsigned int ) * AI_MAX_NUMBER_OF_TEXTURECOORDS);
     }
 

code/ObjFileImporter.cpp

@@ -289,6 +289,10 @@ aiMesh *ObjFileImporter::createTopology( const ObjFile::Model* pModel, const Obj
     }
     ai_assert( NULL != pObjMesh );
     aiMesh* pMesh = new aiMesh;
+    if( !pObjMesh->m_name.empty() ) {
+        pMesh->mName.Set( pObjMesh->m_name );
+    }
+
     for (size_t index = 0; index < pObjMesh->m_Faces.size(); index++)
     {
         ObjFile::Face *const inp = pObjMesh->m_Faces[ index ];
@@ -311,19 +315,16 @@ aiMesh *ObjFileImporter::createTopology( const ObjFile::Model* pModel, const Obj
     }
 
     unsigned int uiIdxCount( 0u );
-    if ( pMesh->mNumFaces > 0 )
-    {
+    if ( pMesh->mNumFaces > 0 ) {
         pMesh->mFaces = new aiFace[ pMesh->mNumFaces ];
-        if ( pObjMesh->m_uiMaterialIndex != ObjFile::Mesh::NoMaterial )
-        {
+        if ( pObjMesh->m_uiMaterialIndex != ObjFile::Mesh::NoMaterial ) {
             pMesh->mMaterialIndex = pObjMesh->m_uiMaterialIndex;
         }
 
         unsigned int outIndex( 0 );
 
         // Copy all data from all stored meshes
-        for (size_t index = 0; index < pObjMesh->m_Faces.size(); index++)
-        {
+        for (size_t index = 0; index < pObjMesh->m_Faces.size(); index++) {
             ObjFile::Face* const inp = pObjMesh->m_Faces[ index ];
             if (inp->m_PrimitiveType == aiPrimitiveType_LINE) {
                 for(size_t i = 0; i < inp->m_pVertices->size() - 1; ++i) {

code/ObjFileParser.cpp

@@ -440,7 +440,7 @@ void ObjFileParser::getFace(aiPrimitiveType type)
 
     // Assign face to mesh
     if ( NULL == m_pModel->m_pCurrentMesh ) {
-        createMesh();
+        createMesh( "defaultobject" );
     }
 
     // Store the face
@@ -496,7 +496,7 @@ void ObjFileParser::getMaterialDesc()
         m_pModel->m_pCurrentMaterial = (*it).second;
         if ( needsNewMesh( strName ))
         {
-            createMesh();
+            createMesh( strName  );
         }
         m_pModel->m_pCurrentMesh->m_uiMaterialIndex = getMaterialIndex( strName );
     }
@@ -585,7 +585,7 @@ void ObjFileParser::getNewMaterial()
         // Set new material
         if ( needsNewMesh( strMat ) )
         {
-            createMesh();
+            createMesh( strMat );
         }
         m_pModel->m_pCurrentMesh->m_uiMaterialIndex = getMaterialIndex( strMat );
     }
@@ -714,7 +714,7 @@ void ObjFileParser::createObject(const std::string &objName)
     m_pModel->m_pCurrent->m_strObjName = objName;
     m_pModel->m_Objects.push_back( m_pModel->m_pCurrent );
 
-    createMesh();
+    createMesh( objName  );
 
     if( m_pModel->m_pCurrentMaterial )
     {
@@ -725,10 +725,10 @@ void ObjFileParser::createObject(const std::string &objName)
 }
 // -------------------------------------------------------------------
 //  Creates a new mesh
-void ObjFileParser::createMesh()
+void ObjFileParser::createMesh( const std::string &meshName )
 {
     ai_assert( NULL != m_pModel );
-    m_pModel->m_pCurrentMesh = new ObjFile::Mesh;
+    m_pModel->m_pCurrentMesh = new ObjFile::Mesh( meshName );
     m_pModel->m_Meshes.push_back( m_pModel->m_pCurrentMesh );
     unsigned int meshId = m_pModel->m_Meshes.size()-1;
     if ( NULL != m_pModel->m_pCurrent )

code/ObjFileParser.h

@@ -113,9 +113,9 @@ private:
     /// Parse object name
     void getObjectName();
     /// Creates a new object.
-    void createObject(const std::string &strObjectName);
+    void createObject( const std::string &strObjectName );
     /// Creates a new mesh.
-    void createMesh();
+    void createMesh( const std::string &meshName );
     /// Returns true, if a new mesh instance must be created.
     bool needsNewMesh( const std::string &rMaterialName );
     /// Error report in token