sentence: a large number of tech camps have opened since 1999 , some operating at just one or few regional sites , and others operating at multiple locations throughout the u.s. tech camps encompass a wide range of technology offerings , often multimedia and gaming based , such as flash animation , digital filmmaking , graphic design , video game design , comic book design , 3d character modeling , game modding , professional gaming , c++ , java , action scripting , robotics , machinima , digital photography and the adoption of web 2.0 .