Raycast
If you've not made many datapacks, you might not be familiar with raycasting. It's a really useful tool which we can use to essentially find where the player is looking and then do stuff (such as spawn explosions B) ).
To create a raycast, we can use a recursive function. A recursive function is a function which will run itself over and over again. In our case, the function will run itself 0.1 blocks forward (^ ^ ^0.1) each time, and repeat until it hits something. It will do this all within the same tick - but bear in mind that the bigger the distance, the more laggy it will be. We can stop this unwanted behaviour by putting a distance limit on the raycast - each time it runs itself, it will count down on a scoreboard, and only repeat if it hasn't hit the limit.
start_raycast function:```elixir
Set the distance limit on the raycast. (10 x limit in blocks, so 1000 would be 100 blocks)
scoreboard players set .limit <objective> 1000
Start the raycast
execute at @s anchored eyes positioned ^ ^ ^.1 run function <namespace>:raycast```
raycast function:```elixir
Optional - place a particle, to make the raycast leave a trail
particle minecraft:dust 1 0 0 1 ~ ~ ~
If the raycast has hit a block, do something
execute unless block ~ ~ ~ <namespace>:pass_through run setblock ~ ~ ~ diamond_block
If the raycast hasn't hit a block, continue
execute if block ~ ~ ~ <namespace>:pass_through positioned ^ ^ ^0.1 run function <namespace>:raycast```
namespace/tags/blocks/pass_through.json: { "replace": false, "values": [ "minecraft:air", "minecraft:cave_air", "minecraft:void_air" ] }
This should be it! Make sure you add all the functions, and fill in all the blanks (indicated by <this>). Then, you can run the start_raycast function as a player, and it should work.
rich kindle
craggy ruin
atomic totem
worldly niche