cam_pos      = [0.0694171, 1.43359, 0.378793]';
cam_dir      = [-0.792135, -0.0118915, 0.61023]';
cam_up       = [-0.0322973, 0.999226, -0.022453]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.810623, 0.0498678, 1.05323]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;