Most smartphones released after 2018 support google arcore that allows to use some basic AR features such as placing objects in a room. But here comes the question: My redmi note 8 pro does not have any depth sensors like Lidar or TOF but it is able (like other smartphones) to calculate the dimensions of the space in a room and place objects accurately enough(phones like the iphone has Lidar, so it is more precise and it is able to do more). How are phones without any kind of depht sensors able to do this?
