Add Basic Combat

pumpkin-protocol/src/client/play/c_entity_velocity.rs

@@ -0,0 +1,24 @@
+use pumpkin_macros::packet;
+use serde::Serialize;
+
+use crate::VarInt;
+
+#[derive(Serialize)]
+#[packet(0x5A)]
+pub struct CEntityVelocity<'a> {
+    entitiy_id: &'a VarInt,
+    velocity_x: i16,
+    velocity_y: i16,
+    velocity_z: i16,
+}
+
+impl<'a> CEntityVelocity<'a> {
+    pub fn new(entitiy_id: &'a VarInt, velocity_x: f32, velocity_y: f32, velocity_z: f32) -> Self {
+        Self {
+            entitiy_id,
+            velocity_x: (velocity_x.clamp(-3.9, 3.9) * 8000.0) as i16,
+            velocity_y: (velocity_y.clamp(-3.9, 3.9) * 8000.0) as i16,
+            velocity_z: (velocity_z.clamp(-3.9, 3.9) * 8000.0) as i16,
+        }
+    }
+}

pumpkin-protocol/src/client/play/c_hurt_animation.rs

@@ -5,13 +5,13 @@ use crate::VarInt;
 
 #[derive(Serialize)]
 #[packet(0x24)]
-pub struct CHurtAnimation {
-    entitiy_id: VarInt,
+pub struct CHurtAnimation<'a> {
+    entitiy_id: &'a VarInt,
     yaw: f32,
 }
 
-impl CHurtAnimation {
-    pub fn new(entitiy_id: VarInt, yaw: f32) -> Self {
+impl<'a> CHurtAnimation<'a> {
+    pub fn new(entitiy_id: &'a VarInt, yaw: f32) -> Self {
         Self { entitiy_id, yaw }
     }
 }

pumpkin-protocol/src/client/play/mod.rs

@@ -5,6 +5,7 @@ mod c_chunk_data;
 mod c_disguised_chat_message;
 mod c_entity_animation;
 mod c_entity_metadata;
+mod c_entity_velocity;
 mod c_game_event;
 mod c_head_rot;
 mod c_hurt_animation;
@@ -34,6 +35,7 @@ pub use c_chunk_data::*;
 pub use c_disguised_chat_message::*;
 pub use c_entity_animation::*;
 pub use c_entity_metadata::*;
+pub use c_entity_velocity::*;
 pub use c_game_event::*;
 pub use c_head_rot::*;
 pub use c_hurt_animation::*;

pumpkin-world/src/radial_chunk_iterator.rs

@@ -1,4 +1,3 @@
-
 pub struct RadialIterator {
     radius: i32,
     direction: usize,

pumpkin/src/client/mod.rs

@@ -161,6 +161,13 @@ impl Client {
         self.send_packet(&CSyncPlayerPostion::new(x, y, z, yaw, pitch, 0, id.into()));
     }
 
+    pub fn update_health(&mut self, health: f32, food: i32, food_saturation: f32) {
+        let player = self.player.as_mut().unwrap();
+        player.health = health;
+        player.food = food;
+        player.food_saturation = food_saturation;
+    }
+
     pub fn set_gamemode(&mut self, gamemode: GameMode) {
         let player = self.player.as_mut().unwrap();
         player.gamemode = gamemode;

pumpkin/src/client/player_packet.rs

@@ -3,8 +3,8 @@ use pumpkin_entity::EntityId;
 use pumpkin_inventory::WindowType;
 use pumpkin_protocol::{
     client::play::{
-        Animation, CEntityAnimation, CHeadRot, CHurtAnimation, COpenScreen, CUpdateEntityPos,
-        CUpdateEntityPosRot, CUpdateEntityRot,
+        Animation, CEntityAnimation, CEntityVelocity, CHeadRot, CHurtAnimation, COpenScreen,
+        CUpdateEntityPos, CUpdateEntityPosRot, CUpdateEntityRot,
     },
     server::play::{
         SChatCommand, SChatMessage, SClientInformationPlay, SConfirmTeleport, SInteract,
@@ -114,8 +114,8 @@ impl Client {
         entity.x = Self::clamp_horizontal(position_rotation.x);
         entity.y = Self::clamp_vertical(position_rotation.feet_y);
         entity.z = Self::clamp_horizontal(position_rotation.z);
-        entity.yaw = wrap_degrees(position_rotation.yaw);
-        entity.pitch = wrap_degrees(position_rotation.pitch);
+        entity.yaw = wrap_degrees(position_rotation.yaw).clamp(-90.0, 90.0) % 360.0;
+        entity.pitch = wrap_degrees(position_rotation.pitch) % 360.0;
 
         // send new position to all other players
         let on_ground = player.on_ground;
@@ -149,8 +149,8 @@ impl Client {
         }
         let player = self.player.as_mut().unwrap();
         let entity = &mut player.entity;
-        entity.yaw = wrap_degrees(rotation.yaw);
-        entity.pitch = wrap_degrees(rotation.pitch);
+        entity.yaw = wrap_degrees(rotation.yaw).clamp(-90.0, 90.0) % 360.0;
+        entity.pitch = wrap_degrees(rotation.pitch) % 360.0;
         // send new position to all other players
         let on_ground = player.on_ground;
         let entity_id = entity.entity_id;
@@ -195,7 +195,10 @@ impl Client {
         };
         let player = self.player.as_mut().unwrap();
         let id = player.entity_id();
-        server.broadcast_packet_expect(self, &CEntityAnimation::new(id.into(), animation as u8))
+        server.broadcast_packet_expect(
+            &[&self.token],
+            &CEntityAnimation::new(id.into(), animation as u8),
+        )
     }
 
     pub fn handle_chat_message(&mut self, server: &mut Server, chat_message: SChatMessage) {
@@ -264,21 +267,50 @@ impl Client {
     }
 
     pub fn handle_interact(&mut self, server: &mut Server, interact: SInteract) {
+        let attacker_player = self.player.as_ref().unwrap();
+        let entity_id = interact.entity_id;
         // TODO: do validation and stuff
         let config = &server.advanced_config.pvp;
         if config.enabled {
-            let attacked_client = server.get_by_entityid(self, interact.entity_id.0 as EntityId);
-            if let Some(client) = attacked_client {
-                if config.protect_creative
-                    && client.player.as_ref().unwrap().gamemode == GameMode::Creative
-                {
+            let attacked_client = server.get_by_entityid(self, entity_id.0 as EntityId);
+            if let Some(mut client) = attacked_client {
+                let token = client.token.clone();
+                let player = client.player.as_mut().unwrap();
+                let velo = player.velocity;
+                if config.protect_creative && player.gamemode == GameMode::Creative {
                     return;
                 }
-                drop(client);
+                if config.knockback {
+                    let pitch = attacker_player.entity.pitch;
+                    let strength = 1.0;
+                    player.knockback(
+                        strength * 0.5,
+                        (pitch * 0.017453292).sin() as f64,
+                        -(pitch * 0.017453292).cos() as f64,
+                    );
+                    let packet = &CEntityVelocity::new(
+                        &entity_id,
+                        player.velocity.x as f32,
+                        player.velocity.y as f32,
+                        player.velocity.z as f32,
+                    );
+                    player.velocity = velo;
+                    client.send_packet(packet);
+                    //  attacker_player.velocity = attacker_player.velocity.multiply(0.6, 1.0, 0.6);
+                }
                 if config.hurt_animation {
                     // TODO
-                    server.broadcast_packet(self, &CHurtAnimation::new(interact.entity_id, 10.0))
+                    // thats how we prevent borrow errors :c
+                    let packet = &CHurtAnimation::new(&entity_id, 10.0);
+                    self.send_packet(packet);
+                    client.send_packet(packet);
+                    server.broadcast_packet_expect(
+                        &[self.token.as_ref(), token.as_ref()],
+                        &CHurtAnimation::new(&entity_id, 10.0),
+                    )
                 }
+            } else {
+                self.kick("Interacted with invalid entitiy id")
             }
         }
     }

pumpkin/src/commands/gamemode.rs

@@ -32,13 +32,14 @@ impl<'a> Command<'a> for GamemodeCommand {
             }
             Err(_) => {
                 // try to parse from number
-                if let Ok(i) = mode_str.parse::<u8>() { if let Some(mode) = GameMode::from_u8(i) {
-                    player.set_gamemode(mode);
-                    player.send_system_message(
-                        format!("Set own game mode to {:?}", mode).into(),
-                    );
-                    return;
-                } }
+                if let Ok(i) = mode_str.parse::<u8>() {
+                    if let Some(mode) = GameMode::from_u8(i) {
+                        player.set_gamemode(mode);
+                        player
+                            .send_system_message(format!("Set own game mode to {:?}", mode).into());
+                        return;
+                    }
+                }
 
                 player.send_system_message(
                     TextComponent::from("Invalid gamemode")

pumpkin/src/config/mod.rs

@@ -65,6 +65,8 @@ pub struct PVPConfig {
     pub hurt_animation: bool,
     /// Should players in creative be protected against PVP
     pub protect_creative: bool,
+    /// Has PVP Knockback?
+    pub knockback: bool,
 }
 
 impl Default for PVPConfig {
@@ -73,6 +75,7 @@ impl Default for PVPConfig {
             enabled: true,
             hurt_animation: true,
             protect_creative: true,
+            knockback: true,
         }
     }
 }

pumpkin/src/entity/player.rs

@@ -5,10 +5,16 @@ use pumpkin_entity::{entity_type::EntityType, Entity, EntityId};
 use pumpkin_protocol::VarInt;
 use serde::{Deserialize, Serialize};
 
+use crate::util::vec3::Vec3;
+
 pub struct Player {
     pub entity: Entity,
     // current gamemode
     pub gamemode: GameMode,
+    // TODO: prbly should put this into an Living Entitiy or something
+    pub health: f32,
+    pub food: i32,
+    pub food_saturation: f32,
 
     // Client side value, Should be not trusted
     pub on_ground: bool,
@@ -16,6 +22,8 @@ pub struct Player {
     pub sneaking: bool,
     pub sprinting: bool,
 
+    pub velocity: Vec3,
+
     // Current awaiting teleport id, None if did not teleport
     pub awaiting_teleport: Option<VarInt>,
 }
@@ -28,6 +36,11 @@ impl Player {
             awaiting_teleport: None,
             sneaking: false,
             sprinting: false,
+            // TODO: Load this from previous instance
+            health: 20.0,
+            food: 20,
+            food_saturation: 20.0,
+            velocity: Vec3::new(0.0, 0.0, 0.0),
             gamemode,
         }
     }
@@ -35,6 +48,28 @@ impl Player {
     pub fn entity_id(&self) -> EntityId {
         self.entity.entity_id
     }
+
+    pub fn knockback(&mut self, y: f64, x: f64, z: f64) {
+        // This has some vanilla magic
+        let mut x = x;
+        let mut z = z;
+        while x * x + z * z < 9.999999747378752E-6 {
+            x = (rand::random::<f64>() - rand::random::<f64>()) * 0.01;
+            z = (rand::random::<f64>() - rand::random::<f64>()) * 0.01;
+        }
+
+        let var8 = Vec3::new(x, 0.0, z).normalize() * y;
+        let var7 = self.velocity;
+        self.velocity = Vec3::new(
+            var7.x / 2.0 - var8.x,
+            if self.on_ground {
+                (var7.y / 2.0 + x).min(0.4)
+            } else {
+                var7.y
+            },
+            var7.z / 2.0 - var8.z,
+        );
+    }
 }
 
 #[derive(FromPrimitive)]

pumpkin/src/server.rs

@@ -134,8 +134,11 @@ impl Server {
         if client.is_player() {
             let id = client.player.as_ref().unwrap().entity_id();
             let uuid = client.gameprofile.as_ref().unwrap().id;
-            self.broadcast_packet_expect(&client, &CRemovePlayerInfo::new(1.into(), &[UUID(uuid)]));
-            self.broadcast_packet_expect(&client, &CRemoveEntities::new(&[id.into()]))
+            self.broadcast_packet_expect(
+                &[&client.token],
+                &CRemovePlayerInfo::new(1.into(), &[UUID(uuid)]),
+            );
+            self.broadcast_packet_expect(&[&client.token], &CRemoveEntities::new(&[id.into()]))
         }
     }
 
@@ -232,7 +235,7 @@ impl Server {
 
         // spawn player for every client
         self.broadcast_packet_expect(
-            client,
+            &[&client.token],
             // TODO: add velo
             &CSpawnEntity::new(
                 entity_id.into(),
@@ -316,11 +319,15 @@ impl Server {
         }
     }
 
-    pub fn broadcast_packet_expect<P>(&self, from: &Client, packet: &P)
+    pub fn broadcast_packet_expect<P>(&self, from: &[&Token], packet: &P)
     where
         P: ClientPacket,
     {
-        for (_, client) in self.current_clients.iter().filter(|c| c.0 != &from.token) {
+        for (_, client) in self
+            .current_clients
+            .iter()
+            .filter(|c| !from.contains(&c.0.as_ref()))
+        {
             // Check if client is a player
             let mut client = client.borrow_mut();
             if client.is_player() {
@@ -339,7 +346,7 @@ impl Server {
                 "./world".parse().unwrap(),
             );
             level
-                .read_chunks(RadialIterator::new(2).collect(), sender)
+                .read_chunks(RadialIterator::new(7).collect(), sender)
                 .await;
         });
 

pumpkin/src/util/mod.rs

@@ -1 +1,2 @@
 pub mod math;
+pub mod vec3;

pumpkin/src/util/vec3.rs

@@ -0,0 +1,79 @@
+use std::ops::{Mul, Neg};
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Vec3 {
+    pub x: f64,
+    pub y: f64,
+    pub z: f64,
+}
+
+impl Vec3 {
+    pub fn new(x: f64, y: f64, z: f64) -> Self {
+        Vec3 { x, y, z }
+    }
+
+    pub fn length(&self) -> f64 {
+        (self.x * self.x + self.y * self.y + self.z * self.z).sqrt()
+    }
+
+    pub fn normalize(&self) -> Self {
+        let length = self.length();
+        Vec3 {
+            x: self.x / length,
+            y: self.y / length,
+            z: self.z / length,
+        }
+    }
+
+    pub fn add(&self, other: &Vec3) -> Self {
+        Vec3 {
+            x: self.x + other.x,
+            y: self.y + other.y,
+            z: self.z + other.z,
+        }
+    }
+
+    pub fn sub(&self, other: &Vec3) -> Self {
+        Vec3 {
+            x: self.x - other.x,
+            y: self.y - other.y,
+            z: self.z - other.z,
+        }
+    }
+
+    pub fn multiply(self, x: f64, y: f64, z: f64) -> Self {
+        Self {
+            x: self.x * x,
+            y: self.y * y,
+            z: self.z * z,
+        }
+    }
+
+    pub fn mul(self, scalar: f64) -> Self {
+        Vec3 {
+            x: self.x * scalar,
+            y: self.y * scalar,
+            z: self.z * scalar,
+        }
+    }
+}
+
+impl Mul<f64> for Vec3 {
+    type Output = Self;
+
+    fn mul(self, scalar: f64) -> Self {
+        self.mul(scalar)
+    }
+}
+
+impl Neg for Vec3 {
+    type Output = Self;
+
+    fn neg(self) -> Self {
+        Vec3 {
+            x: -self.x,
+            y: -self.y,
+            z: -self.z,
+        }
+    }
+}