cam_pos      = [0.791329, 1.29914, 1.46194]';
cam_dir      = [-0.0204219, 0.000339198, -0.999791]';
cam_up       = [0.000241674, 1, 0.000334332]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.32972, 0.000312279, 0.0271613]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;