...nny, ...nny, ...nny, ...nny,
                    // 后 +y
                    ...npy, ...npy, ...npy, ...npy,
                    // 左 -x
                    ...nnx, ...nnx, ...nnx, ...nnx,
                    // 右 +x
                    ...npx, ...npx, ...npx, ...npx,
                    // 上 +z
                    ...npz, ...npz, ...npz, ...npz,
                ]);
                // 3 定义纹理数组
                var sts = new Float32Array([
                    0, 0, 1, 0, 1, 