cam_pos      = [0.069417, 1.43359, 0.378792]';
cam_dir      = [-0.792135, -0.0118915, 0.61023]';
cam_up       = [0.0324715, 0.997573, 0.0615905]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.810611, -0.0912421, 1.05047]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;