Mr. Meh's Datapack Library

Mr Meh's Datapack Library is a library made to assist with Datapack creation

Features:

Swapping Item with Offhand Function

function mrlib:player/inventory/swap_hands

• This essentially emulates the "Swap Item with Offhand" keybind but is not dependent on what your keybind is set to

Modifying a Held Item without giving the player a new item

data merge storage mrlib:storage {item:{components:{"minecraft:custom_name":'{"text":"New Item Name"}'}}}
function mrlib:player/inventory/modify_mainhand

• There is a function for modifying offhand
• Put all data for mainhand modifications or offhand modifications in storage, mrlib:storage
• Doesn't directly modify item, instead gives player new item with modified nbt

Movement Tracking Scores

execute as @a run function mrlib:player/movement/update_times
scoreboard players get @s mrlib.movement.walk_time
scoreboard players get @s mrlib.movement.sprint_time
scoreboard players get @s mrlib.movement.fly_time

• These scores all work just like the sneak_time built in score except they reset when you stop moving.
• There is an additional has_motion score which just tracks if you are moving at all and how long, it also resets upon idle
• In order to use the has_motion score you must also run the function mrlib:player/movement/update_has_motion function

Entity Motion

scoreboard players set $strength mrlib.motion 1000
function mrlib:entity/launch/looking

or if you want to control individual xyz motion:

scoreboard players set $x_strength mrlib.motion 1000
scoreboard players set $y_strength mrlib.motion 1000
scoreboard players set $z_strength mrlib.motion 1000
function mrlib:entity/launch/xyz

NOTE: This does not work on players as player motion can not be changed or modified without workarounds

• strength of 1000 launches the entity roughly ~3 blocks or so
• Does not work on players

Macro Damage (damage from nbt)

function mrlib:entity/damage {"damage":DAMAGE_AMOUNT,damageType:"DAMAGE_TYPE"}

or for scoreboard/data usage:

scoreboard players set $mrlib.damage mrlib.var 100
execute store result storage mrlib:storage damage.damage int 0.1 run scoreboard players get $mrlib.damage mrlib.var
data merge storage mrlib:storage {damage:{damageType:"generic"}}
function mrlib:entity/damage with storage mrlib:storage damage

• You can use any score and any storage
• If you choose to use your own storage it must be structured as such:

{PATH:{damage:DAMAGE_AMOUNT,damageType:"DAMAGE_TYPE"}}

Non Solid Block Tag and Function

execute if block ~ ~ ~ #mrlib:non_solid

execute if function mrlib:player/in_non_solid

• The block tag includes all blocks that the player can walk through
• The function checks if there are any solids in the players hitbox if there is it returns a fail

NOTES

Remember that this is a work in progress so their may be bugs! It is also being worked on by a programming amateur so it may not be written in the most optimized and efficient way.