Fluid physics (#199)

* start implementing fluid physics

* Initial implementation of fluid pushing

* different travel function in water

* bubble columns

* jumping in water

* cleanup

* change ultrawarm to be required

* fix for clippy

3 files changed, 12 insertions, 4 deletions

diff --git a/azalea-client/src/mining.rs b/azalea-client/src/mining.rs
index bf5a48ca..ac4c9c0d 100644
--- a/azalea-client/src/mining.rs
+++ b/azalea-client/src/mining.rs
@@ -1,4 +1,4 @@
-use azalea_block::{Block, BlockState, FluidState};
+use azalea_block::{fluid_state::FluidState, Block, BlockState};
 use azalea_core::{direction::Direction, game_type::GameMode, position::BlockPos, tick::GameTick};
 use azalea_entity::{mining::get_mine_progress, FluidOnEyes, Physics};
 use azalea_inventory::ItemStack;
diff --git a/azalea-client/src/movement.rs b/azalea-client/src/movement.rs
index 8801e2c6..ec5b751e 100644
--- a/azalea-client/src/movement.rs
+++ b/azalea-client/src/movement.rs
@@ -65,7 +65,8 @@ impl Plugin for PlayerMovePlugin {
                     (tick_controls, local_player_ai_step)
                         .chain()
                         .in_set(PhysicsSet)
-                        .before(ai_step),
+                        .before(ai_step)
+                        .before(azalea_physics::fluids::update_in_water_state_and_do_fluid_pushing),
                     send_sprinting_if_needed.after(azalea_entity::update_in_loaded_chunk),
                     send_position.after(PhysicsSet),
                 )
@@ -324,8 +325,8 @@ pub fn local_player_ai_step(
 ) {
     for (physics_state, mut physics, mut sprinting, mut attributes) in query.iter_mut() {
         // server ai step
-        physics.xxa = physics_state.left_impulse;
-        physics.zza = physics_state.forward_impulse;
+        physics.x_acceleration = physics_state.left_impulse;
+        physics.z_acceleration = physics_state.forward_impulse;
 
         // TODO: food data and abilities
         // let has_enough_food_to_sprint = self.food_data().food_level ||
diff --git a/azalea-client/src/packet_handling/game.rs b/azalea-client/src/packet_handling/game.rs
index d92f2464..0d5a6afe 100644
--- a/azalea-client/src/packet_handling/game.rs
+++ b/azalea-client/src/packet_handling/game.rs
@@ -500,6 +500,9 @@ pub fn process_packet_events(ecs: &mut World) {
                     **position = new_pos;
                 }
 
+                // old_pos is set to the current position when we're teleported
+                physics.set_old_pos(&position);
+
                 // send the relevant packets
 
                 send_packet_events.send(SendPacketEvent::new(
@@ -853,10 +856,14 @@ pub fn process_packet_events(ecs: &mut World) {
                         if new_pos != **position {
                             **position = new_pos;
                         }
+                        let position = *position;
                         let mut look_direction = entity.get_mut::<LookDirection>().unwrap();
                         if new_look_direction != *look_direction {
                             *look_direction = new_look_direction;
                         }
+                        // old_pos is set to the current position when we're teleported
+                        let mut physics = entity.get_mut::<Physics>().unwrap();
+                        physics.set_old_pos(&position);
                     }),
                 });