Merge pull request #4403 from JaroslavPribyl/fix/obj_with_bspline_crash

Fix parsing OBJ with free-form curve/surface body statements

code/AssetLib/Obj/ObjFileParser.cpp

@@ -117,6 +117,7 @@ void ObjFileParser::parseFile(IOStreamBuffer<char> &streamBuffer) {
     unsigned int processed = 0;
     size_t lastFilePos(0);
 
+    bool insideCstype = false;
     std::vector<char> buffer;
     while (streamBuffer.getNextDataLine(buffer, '\\')) {
         m_DataIt = buffer.begin();
@@ -131,6 +132,18 @@ void ObjFileParser::parseFile(IOStreamBuffer<char> &streamBuffer) {
             m_progress->UpdateFileRead(processed, progressTotal);
         }
 
+        // handle cstype section end (http://paulbourke.net/dataformats/obj/)
+        if (insideCstype) {
+            switch (*m_DataIt) {
+            case 'e': {
+                std::string name;
+                getNameNoSpace(m_DataIt, m_DataItEnd, name);
+                insideCstype = name != "end";
+            } break;
+            }
+            goto pf_skip_line;
+        }
+
         // parse line
         switch (*m_DataIt) {
         case 'v': // Parse a vertex texture coordinate
@@ -219,6 +232,14 @@ void ObjFileParser::parseFile(IOStreamBuffer<char> &streamBuffer) {
             getObjectName();
         } break;
 
+        case 'c': // handle cstype section start
+        {
+            std::string name;
+            getNameNoSpace(m_DataIt, m_DataItEnd, name);
+            insideCstype = name == "cstype";
+            goto pf_skip_line;
+        } break;
+
         default: {
         pf_skip_line:
             m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);