cam_pos      = [0.069417, 1.43359, 0.378792]';
cam_dir      = [-0.792135, -0.0118915, 0.61023]';
cam_up       = [0.0390063, 0.99678, 0.0700578]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.810102, -0.105466, 1.04953]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;