Best way to draw an array of objects

yes, the solution i posted only goes to size()-1 for that reason. by default in gcc and clang accessing a vector with [] doesn't do bound checks for performance reasons. in visual studio it only does them in debug but not in release. with gcc, you can enable it by adding a define when compiling: -D_GLIBCXX_DEBUG or when using clang with libc++ (the default in osx since 0.9) with -D_LIBCPP_DEBUG