cam_pos      = [0.0661358, 1.73046, 0.951209]';
cam_dir      = [-0.618916, -0.0914782, 0.780112]';
cam_up       = [-0.493849, 0.817644, -0.295925]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.812341, 0.755985, 0.733135]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;