Return the player's pitch (angle in the up / down direction).
The default is to get the rotation for the first player spawned in the Minecraft
world, but this can be run for a different player by using the player_id
argument.
Usage
getPlayerPitch(player_id = NULL)
Arguments
player_id
Integer giving the ID of a player. You can find IDs of all
current players using getPlayerIds.
Value
A double vector of length one with a value between
-90 (looking straight up) and 90 (looking straight down)
giving the pitch of the player's viewpoint.