Mouse coordinate tracking
There is a mechanicsm of mouse coordinate tracking within the client.
This records the
(x, y) coordinates of the mouse, and sends them
back to the server each tick.
When the client connects with the server, after it receives the player privilege, it receives a byte denoting whether or not the client should send these coordinates to the server periodically.
byte opcode = 45; byte dummy = 0; byte mouse_data;