+ 0 player's entity state as predicted by the client
+ 64 movement input, 3x 16bit signed int, each component mapped from [-1,1] to [-32767,32767]
+ 70 pitch input, 16bit signed int, mapped from [-PI/2,PI/2] to [-32767,32767]
+ 72 yaw input, 16bit signed int, mapped from [-PI,PI] to [-32767,32767]
+ 74 active actions, 8bit bit field, first three bits are primary, secondary, and tertiary
+ 75 selected inventory slot, 8bit unsigned int
+Length: 76