cam_pos      = [0.342326, 1.4714, 1.19909]';
cam_dir      = [0.0736529, -0.123346, -0.989627]';
cam_up       = [-0.553464, 0.820427, -0.143448]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.10338, -0.742523, 0.0104278]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;