Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
Google has added custom Calling Cards that will appear on compatible Android phones when you call them, so the person on the other end knows who's trying to get in contact. Available now on Android 11+ and arriving soon on Wear OS, Calling Cards require both the caller and recipient's devices to have Phone by Google set as their primary calling app. Fortunately, you can choose to only show your Calling Card to your contacts if you prefer.
，更多细节参见爱思助手
DOOM Raycaster Demo
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