Refactor azalea-protocol (#190)

* start updating to 1.21.4

* fix block codegen and stop using block data from burger

* rename packet related modules and structs to be simpler

* ItemSlot -> ItemStack for more consistency with mojmap

* .get() -> .into_packet()

* simplify declare_state_packets by removing packet ids

* rename read_from and write_into to azalea_read and azalea_write

* rename McBufReadable and McBufWritable to AzaleaRead and AzaleaWrite

* McBuf -> AzBuf

* remove most uses of into_variant

* update codegen and use resourcelocation names for packets

* implement #[limit(i)] attribute for AzBuf derive macro

* fixes for 1.21.4

* fix examples

* update some physics code and fix ChatType

* remove unused imports in codegen

* re-add some things to migrate.py and update +mc version numbers automatically

* downgrade to 1.21.3 lol

1 files changed, 61 insertions, 0 deletions

diff --git a/azalea-protocol/src/packets/game/c_player_position.rs b/azalea-protocol/src/packets/game/c_player_position.rs
new file mode 100755
index 00000000..aa030fc5
--- /dev/null
+++ b/azalea-protocol/src/packets/game/c_player_position.rs
@@ -0,0 +1,61 @@
+use std::io::{Cursor, Write};
+
+use azalea_buf::{AzBuf, AzaleaRead, AzaleaWrite, BufReadError};
+use azalea_core::{bitset::FixedBitSet, position::Vec3};
+use azalea_protocol_macros::ClientboundGamePacket;
+
+#[derive(Clone, Debug, AzBuf, ClientboundGamePacket)]
+pub struct ClientboundPlayerPosition {
+    #[var]
+    pub id: u32,
+    pub pos: Vec3,
+    pub delta_movement: Vec3,
+    pub y_rot: f32,
+    pub x_rot: f32,
+    pub relative_arguments: RelativeMovements,
+}
+
+#[derive(Debug, Clone)]
+pub struct RelativeMovements {
+    pub x: bool,
+    pub y: bool,
+    pub z: bool,
+    pub y_rot: bool,
+    pub x_rot: bool,
+}
+
+impl AzaleaRead for RelativeMovements {
+    fn azalea_read(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
+        // yes minecraft seriously wastes that many bits, smh
+        let set = FixedBitSet::<32>::azalea_read(buf)?;
+        Ok(RelativeMovements {
+            x: set.index(0),
+            y: set.index(1),
+            z: set.index(2),
+            y_rot: set.index(3),
+            x_rot: set.index(4),
+        })
+    }
+}
+
+impl AzaleaWrite for RelativeMovements {
+    fn azalea_write(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
+        let mut set = FixedBitSet::<5>::new();
+        if self.x {
+            set.set(0);
+        }
+        if self.y {
+            set.set(1);
+        }
+        if self.z {
+            set.set(2);
+        }
+        if self.y_rot {
+            set.set(3);
+        }
+        if self.x_rot {
+            set.set(4);
+        }
+        set.azalea_write(buf)
+    }
+}