cam_pos      = [-0.206745, 1.53731, 0.844049]';
cam_dir      = [-0.807706, 0.243103, 0.537133]';
cam_up       = [-0.261848, 0.668346, -0.69624]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.70257, 0.934995, 0.633307]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;