cam_pos      = [-1.18914, 1.53316, 0.0605803]';
cam_dir      = [0.103418, -0.430411, 0.896689]';
cam_up       = [0.146242, 0.898305, 0.41432]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.30849, -0.11742, -0.207274]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;