Struct UseOnEvent 

pub struct UseOnEvent<'a> {
    pub stack: &'a ItemStack,
    pub pos: [i32; 3],
    pub face: [i32; 3],
    pub hand: Hand,
    pub hit: BlockHit,
    pub player: u128,
    pub player_entity_id: i32,
}

What ItemPart::use_on is told. Each field is that hook’s argument of the same name, described in the hook’s doc.

Fields

stack: &'a ItemStack

pos: [i32; 3]

face: [i32; 3]

hand: Hand

hit: BlockHit

player: u128

player_entity_id: i32