From 8e1c52aca5a93a14c386d75bc7b389a30a66d2f2 Mon Sep 17 00:00:00 2001
From: Andrew Brower <bigspeedfpv@gmail.com>
Date: Tue, 19 Nov 2024 15:44:12 -0500
Subject: [PATCH] feat: modern art feature flag

---
 Cargo.toml                         |  1 +
 src/protocol/packets/play/world.rs | 24 ++++++++++++++++++++----
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 96769b2..c92209e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -48,6 +48,7 @@ uuid = "1.11.0"
 default = []
 compression = []
 encryption = ["dep:cfb8", "dep:aes"]
+modern_art = []
 lan = []
 
 full = ["compression", "encryption"]
diff --git a/src/protocol/packets/play/world.rs b/src/protocol/packets/play/world.rs
index 61f9a49..775ef5d 100644
--- a/src/protocol/packets/play/world.rs
+++ b/src/protocol/packets/play/world.rs
@@ -195,8 +195,11 @@ impl ChunkSection {
     pub fn anvil_to_sec(value: &world::Section, block_states: &Blocks) -> Self {
         let mut blocks: [i16; 16 * 16 * 16] = [0; 16 * 16 * 16];
         let bit_length = (64 - (value.block_states.palette.len() as u64).leading_zeros()).max(4);
+
+        #[cfg(not(feature = "modern_art"))]
         let blocks_per_long = 64 / bit_length;
 
+        #[cfg(not(feature = "modern_art"))]
         let bit_mask = (1 << bit_length) - 1;
 
         match value.block_states.data {
@@ -204,10 +207,23 @@ impl ChunkSection {
             Some(ref data) => {
                 let mut i = 0;
                 for long in data.iter() {
-                    let long = *long as u64;
-                    for b in 0..blocks_per_long {
-                        blocks[i] = ((long >> (bit_length * b)) & bit_mask) as i16;
-                        i += 1;
+                    #[cfg(not(feature = "modern_art"))]
+                    {
+                        let long = *long as u64;
+                        for b in 0..blocks_per_long {
+                            blocks[i] = ((long >> (bit_length * b)) & bit_mask) as i16;
+                            i += 1;
+                        }
+                    }
+
+                    #[cfg(feature = "modern_art")]
+                    {
+                        let mut long = *long as u64;
+                        while long != 0 {
+                            blocks[i] = (long & ((1 << bit_length) - 1)) as i16;
+                            long >>= bit_length;
+                            i += 1;
+                        }
                     }
                 }
             }
-- 
2.51.2