roll_angle         23 include/view/NetworkViewer.hpp     double roll_angle;
roll_angle        158 src/view/NetworkViewer.cpp     roll_angle          = M_PI / 36.0;
roll_angle        394 src/view/NetworkViewer.cpp                                         roll(-roll_angle, view_index);
roll_angle        398 src/view/NetworkViewer.cpp                                         roll(roll_angle, view_index);