cam_pos      = [0.298356, 1.49994, 1.54024]';
cam_dir      = [-0.992359, -0.0603747, 0.107607]';
cam_up       = [-0.112876, 0.796431, -0.594102]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.0662772, 0.800273, 1.06022]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;