start adding get_block_state

2 files changed, 42 insertions, 3 deletions

diff --git a/azalea-core/src/lib.rs b/azalea-core/src/lib.rs
index 0053dc9b..2b12db53 100755
--- a/azalea-core/src/lib.rs
+++ b/azalea-core/src/lib.rs
@@ -9,7 +9,7 @@ mod slot;
 pub use slot::{Slot, SlotData};
 
 mod position;
-pub use position::{BlockPos, ChunkPos, ChunkSectionPos};
+pub use position::{BlockPos, ChunkPos, ChunkSectionBlockPos, ChunkSectionPos};
 
 mod direction;
 pub use direction::Direction;
diff --git a/azalea-core/src/position.rs b/azalea-core/src/position.rs
index a2292651..1dd200ab 100644
--- a/azalea-core/src/position.rs
+++ b/azalea-core/src/position.rs
@@ -1,3 +1,5 @@
+use std::ops::Rem;
+
 #[derive(Clone, Copy, Debug, Default)]
 pub struct BlockPos {
     pub x: i32,
@@ -11,6 +13,18 @@ impl BlockPos {
     }
 }
 
+impl Rem<i32> for BlockPos {
+    type Output = Self;
+
+    fn rem(self, rhs: i32) -> Self {
+        BlockPos {
+            x: self.x % rhs,
+            y: self.y % rhs,
+            z: self.z % rhs,
+        }
+    }
+}
+
 #[derive(Clone, Copy, Debug, Default)]
 pub struct ChunkPos {
     pub x: i32,
@@ -23,8 +37,8 @@ impl ChunkPos {
     }
 }
 
-impl From<BlockPos> for ChunkPos {
-    fn from(pos: BlockPos) -> Self {
+impl From<&BlockPos> for ChunkPos {
+    fn from(pos: &BlockPos) -> Self {
         ChunkPos {
             x: pos.x / 16,
             z: pos.z / 16,
@@ -32,6 +46,7 @@ impl From<BlockPos> for ChunkPos {
     }
 }
 
+/// The coordinates of a chunk section in the world.
 #[derive(Clone, Copy, Debug, Default)]
 pub struct ChunkSectionPos {
     pub x: i32,
@@ -60,3 +75,27 @@ impl From<ChunkSectionPos> for ChunkPos {
         ChunkPos { x: pos.x, z: pos.z }
     }
 }
+
+/// The coordinates of a block inside a chunk section.
+#[derive(Clone, Copy, Debug, Default)]
+pub struct ChunkSectionBlockPos {
+    pub x: u8,
+    pub y: u8,
+    pub z: u8,
+}
+
+impl ChunkSectionBlockPos {
+    pub fn new(x: u8, y: u8, z: u8) -> Self {
+        ChunkSectionBlockPos { x, y, z }
+    }
+}
+
+impl From<&BlockPos> for ChunkSectionBlockPos {
+    fn from(pos: &BlockPos) -> Self {
+        ChunkSectionBlockPos {
+            x: pos.x.rem(16).abs() as u8,
+            y: pos.y.rem(16).abs() as u8,
+            z: pos.z.rem(16).abs() as u8,
+        }
+    }
+}