After experiencing some odd behavior, I tracked down a bug in AntTweakBar's TwDefineEnumFromString function. The problem seems to be that the labels in the label-value pairs stored for custom enum types are stored as const char *. The original code sets these pointers to dynamically allocated std::strings via the c_str function. This is trouble because the strings are in a local scope and then the memory can be arbitrarily written over.
Without changing too much I fixed this by first copying the strings into dynamic memory. This causes a leak, but I think to fix the leak I'd have to change the implementation of the struct that stores the label-value pair and refactor.
So just change the code in TwMgr.cpp to look like:
TwType TW_CALL TwDefineEnumFromString(const char *_Name, const char *_EnumString)
{
if (_EnumString == NULL)
return TwDefineEnum(_Name, NULL, 0);
// split enumString
stringstream EnumStream(_EnumString);
string Label;
vector<string> Labels;
while( getline(EnumStream, Label, ',') ) {
// trim Label
size_t Start = Label.find_first_not_of(" \n\r\t");
size_t End = Label.find_last_not_of(" \n\r\t");
if( Start==string::npos || End==string::npos )
Label = "";
else
Label = Label.substr(Start, (End-Start)+1);
// store Label
Labels.push_back(Label);
}
// create TwEnumVal array
vector<TwEnumVal> Vals(Labels.size());
for( int i=0; i<(int)Labels.size(); i++ )
{
Vals[i].Value = i;
// CHANGE HERE:
//Vals[i].Label = Labels[i].c_str();
char * c_label = new char[Labels[i].length()+1];
std::strcpy(c_label, Labels[i].c_str());
Vals[i].Label = c_label;
}
return TwDefineEnum(_Name, Vals.empty() ? NULL : &(Vals[0]), (unsigned int)Vals.size());
}