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|
use azalea_core::{game_type::GameMode, tick::GameTick};
use azalea_entity::{
Attributes, Physics,
metadata::{ShiftKeyDown, Sprinting},
update_bounding_box,
};
use azalea_physics::PhysicsSet;
use azalea_protocol::packets::game::s_interact::{self, ServerboundInteract};
use azalea_world::MinecraftEntityId;
use bevy_app::{App, Plugin, Update};
use bevy_ecs::prelude::*;
use derive_more::{Deref, DerefMut};
use super::packet::game::SendPacketEvent;
use crate::{
Client, interact::SwingArmEvent, local_player::LocalGameMode, movement::MoveEventsSet,
respawn::perform_respawn,
};
pub struct AttackPlugin;
impl Plugin for AttackPlugin {
fn build(&self, app: &mut App) {
app.add_event::<AttackEvent>()
.add_systems(
Update,
handle_attack_event
.before(update_bounding_box)
.before(MoveEventsSet)
.after(perform_respawn),
)
.add_systems(
GameTick,
(
increment_ticks_since_last_attack,
update_attack_strength_scale.after(PhysicsSet),
handle_attack_queued
.before(super::tick_end::game_tick_packet)
.after(super::movement::send_sprinting_if_needed)
.before(super::movement::send_position),
)
.chain(),
);
}
}
impl Client {
/// Attack the entity with the given id.
pub fn attack(&self, entity_id: MinecraftEntityId) {
self.ecs.lock().send_event(AttackEvent {
entity: self.entity,
target: entity_id,
});
}
/// Whether the player has an attack cooldown.
pub fn has_attack_cooldown(&self) -> bool {
let Some(AttackStrengthScale(ticks_since_last_attack)) =
self.get_component::<AttackStrengthScale>()
else {
// they don't even have an AttackStrengthScale so they probably can't attack
// lmao, just return false
return false;
};
ticks_since_last_attack < 1.0
}
}
/// A component that indicates that this client will be attacking the given
/// entity next tick.
#[derive(Component, Clone, Debug)]
pub struct AttackQueued {
pub target: MinecraftEntityId,
}
pub fn handle_attack_queued(
mut commands: Commands,
mut query: Query<(
Entity,
&AttackQueued,
&LocalGameMode,
&mut TicksSinceLastAttack,
&mut Physics,
&mut Sprinting,
&ShiftKeyDown,
)>,
) {
for (
entity,
attack_queued,
game_mode,
mut ticks_since_last_attack,
mut physics,
mut sprinting,
sneaking,
) in &mut query
{
commands.entity(entity).remove::<AttackQueued>();
commands.trigger(SendPacketEvent::new(
entity,
ServerboundInteract {
entity_id: attack_queued.target,
action: s_interact::ActionType::Attack,
using_secondary_action: **sneaking,
},
));
commands.trigger(SwingArmEvent { entity });
// we can't attack if we're in spectator mode but it still sends the attack
// packet
if game_mode.current == GameMode::Spectator {
continue;
};
ticks_since_last_attack.0 = 0;
physics.velocity = physics.velocity.multiply(0.6, 1.0, 0.6);
**sprinting = false;
}
}
/// Queues up an attack packet for next tick by inserting the [`AttackQueued`]
/// component to our client.
#[derive(Event)]
pub struct AttackEvent {
/// Our client entity that will send the packets to attack.
pub entity: Entity,
pub target: MinecraftEntityId,
}
pub fn handle_attack_event(mut events: EventReader<AttackEvent>, mut commands: Commands) {
for event in events.read() {
commands.entity(event.entity).insert(AttackQueued {
target: event.target,
});
}
}
#[derive(Default, Bundle)]
pub struct AttackBundle {
pub ticks_since_last_attack: TicksSinceLastAttack,
pub attack_strength_scale: AttackStrengthScale,
}
#[derive(Default, Component, Clone, Deref, DerefMut)]
pub struct TicksSinceLastAttack(pub u32);
pub fn increment_ticks_since_last_attack(mut query: Query<&mut TicksSinceLastAttack>) {
for mut ticks_since_last_attack in query.iter_mut() {
**ticks_since_last_attack += 1;
}
}
#[derive(Default, Component, Clone, Deref, DerefMut)]
pub struct AttackStrengthScale(pub f32);
pub fn update_attack_strength_scale(
mut query: Query<(&TicksSinceLastAttack, &Attributes, &mut AttackStrengthScale)>,
) {
for (ticks_since_last_attack, attributes, mut attack_strength_scale) in query.iter_mut() {
// look 0.5 ticks into the future because that's what vanilla does
**attack_strength_scale =
get_attack_strength_scale(ticks_since_last_attack.0, attributes, 0.5);
}
}
/// Returns how long it takes for the attack cooldown to reset (in ticks).
pub fn get_attack_strength_delay(attributes: &Attributes) -> f32 {
((1. / attributes.attack_speed.calculate()) * 20.) as f32
}
pub fn get_attack_strength_scale(
ticks_since_last_attack: u32,
attributes: &Attributes,
in_ticks: f32,
) -> f32 {
let attack_strength_delay = get_attack_strength_delay(attributes);
let attack_strength = (ticks_since_last_attack as f32 + in_ticks) / attack_strength_delay;
attack_strength.clamp(0., 1.)
}
|
