https://developers.weixin.qq.com/miniprogram/dev/api/ai/visionkit/VKCamera.getProjectionMatrix.html

打开时 camera.getProjectionMatrix(NEAR, FAR) 值为

[0, -108.91926574707031, 0, 0, 160.55506896972656, 0, 0, 0, 0, 0, -1.0000019073486328, -1, 0, 0, -0.002000001957640052, 0]

关屏后，重新打开 camera.getProjectionMatrix(NEAR, FAR) 值为

[0, -1.4281480312347412, 0, 0, 2.105195999145508, 0, 0, 0, 0, 0, -1.0000019073486328, -1, 0, 0, -0.002000001957640052, 0]

关屏后的值，感觉是比较合适的，原因是什么？