cam_pos      = [0.0727026, 1.04154, 0.594671]';
cam_dir      = [0.823589, 0.416329, 0.38519]';
cam_up       = [-0.567031, 0.588412, 0.576409]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.0177229, 0.921875, -0.958506]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;