See this: http://blog.derhess.de/2010/06/02/creative-coding-tools-which-is-the-best/

If you are beginning and have no background in C++ then Processing is the most logical solution. If you want to move to C++ then you have a choice between oF and Cinder. The performance difference between Processing and the C++ creative frameworks is most likely much smaller now compared with a few years ago.