chore: some fixes

pumpkin-codegen/src/chunk_view_lut.rs

@@ -0,0 +1,42 @@
+use proc_macro2::TokenStream;
+use quote::quote;
+
+const MAX_VIEW_DISTANCE: u8 = 32;
+
+pub fn build() -> TokenStream {
+    let entries = (0..=MAX_VIEW_DISTANCE).map(|dist| {
+        if dist < 2 {
+            return quote! { &[] };
+        }
+        let mut positions = vec![];
+        let d = i64::from(dist);
+
+        for z in -(d + 2)..=(d + 2) {
+            for x in -(d + 2)..=(d + 2) {
+                let rel_x = (x.abs() - 2).max(0);
+                let rel_z = (z.abs() - 2).max(0);
+                if rel_x * rel_x + rel_z * rel_z < d * d {
+                    positions.push((x as i8, z as i8));
+                }
+            }
+        }
+
+        positions.sort_by_key(|&(x, z)| i32::from(x).pow(2) + i32::from(z).pow(2));
+
+        let array_elems = positions.into_iter().map(|(x, z)| quote!((#x, #z)));
+
+        quote! {
+            &[ #(#array_elems),* ]
+        }
+    });
+
+    let array_len = MAX_VIEW_DISTANCE as usize + 1;
+
+    quote! {
+        /// The maximum supported view distance
+        pub const MAX_VIEW_DISTANCE: u8 = #MAX_VIEW_DISTANCE;
+
+        /// Static precomputed lookup table for relative chunk offsets by view distance (0..=32).
+        pub static CHUNK_VIEW_LUT: [&[(i8, i8)]; #array_len] = [ #(#entries),* ];
+    }
+}

pumpkin-codegen/src/main.rs

@@ -18,6 +18,7 @@ mod block;
 mod carver;
 pub mod chest_loot;
 mod chunk_gen_settings;
+mod chunk_view_lut;
 mod chunk_status;
 mod composter_increase_chance;
 mod configured_feature;
@@ -85,6 +86,7 @@ pub fn main() {
         (meta_data_type::build, "meta_data_type.rs"),
         (tracked_data::build, "tracked_data.rs"),
         (chunk_status::build, "chunk_status.rs"),
+        (chunk_view_lut::build, "chunk_view_lut.rs"),
         (game_event::build, "game_event.rs"),
         (game_rules::build, "game_rules.rs"),
         (registry::build, "registry.rs"),