cam_pos      = [0.107474, 1.98085, 0.0575897]';
cam_dir      = [0.590949, -0.271209, 0.759754]';
cam_up       = [-0.184841, 0.871217, 0.45477]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.04438, 0.544208, -0.61807]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;