From 7b20942c765334687fd5f58df4c0190601b97b58 Mon Sep 17 00:00:00 2001
From: Mel <einebeere@gmail.com>
Date: Sat, 22 Oct 2022 00:16:14 +0200
Subject: Fix chunk index hash to show infinite world

---
 src/World/ChunkIndex.hpp | 14 ++++----------
 src/World/World.cpp      |  8 ++++----
 src/World/World.hpp      |  1 +
 3 files changed, 9 insertions(+), 14 deletions(-)

(limited to 'src/World')

diff --git a/src/World/ChunkIndex.hpp b/src/World/ChunkIndex.hpp
index 330d202..cf5af07 100644
--- a/src/World/ChunkIndex.hpp
+++ b/src/World/ChunkIndex.hpp
@@ -7,13 +7,9 @@
 namespace MC::World {
 
 struct ChunkIndex {
-    ChunkIndex(int64_t x, int64_t y) : x(x), y(x) {}
+    ChunkIndex(int32_t x, int32_t y) : x(x), y(y) {}
 
-    bool operator==(ChunkIndex& other) const {
-        return x == other.x && y == other.y;
-    }
-
-    int64_t x, y;
+    int32_t x, y;
 };
 
 }
@@ -25,9 +21,7 @@ template<> struct std::equal_to<MC::World::ChunkIndex> {
 };
 
 template<> struct std::hash<MC::World::ChunkIndex> {
-    std::size_t operator()(const MC::World::ChunkIndex& i) const noexcept {
-        std::size_t xh = std::hash<int64_t>{}(i.x);
-        std::size_t yh = std::hash<int64_t>{}(i.y);
-        return xh ^ (yh << 1);
+    size_t operator()(const MC::World::ChunkIndex& i) const noexcept {
+        return ((int64_t)i.x << 32) | i.y;
     }
 };
\ No newline at end of file
diff --git a/src/World/World.cpp b/src/World/World.cpp
index 5a0d729..449ba2d 100644
--- a/src/World/World.cpp
+++ b/src/World/World.cpp
@@ -31,8 +31,8 @@ std::vector<World::ChunkData> World::get_visible_chunks(Vector<3> position) {
 }
 
 std::unordered_set<ChunkIndex> World::get_visible_chunk_indices(Vector<3> position) const {
-    int64_t center_x = std::round(position.x() / CHUNK_WIDTH);
-    int64_t center_y = std::round(position.z() / CHUNK_HEIGHT);
+    int32_t center_x = std::round(position.x() / CHUNK_WIDTH);
+    int32_t center_y = std::round(position.z() / CHUNK_HEIGHT);
 
     auto upper_x_bound = center_x + m_view_distance_radius;
     auto lower_x_bound = center_x - m_view_distance_radius;
@@ -41,8 +41,8 @@ std::unordered_set<ChunkIndex> World::get_visible_chunk_indices(Vector<3> positi
 
     std::unordered_set<ChunkIndex> indices{};
     indices.reserve(m_view_distance_radius * m_view_distance_radius * 4);
-    for (int64_t x = lower_x_bound; x < upper_x_bound; x++) {
-        for (int64_t y = lower_y_bound; y < upper_y_bound; y++) {
+    for (int32_t x = lower_x_bound; x < upper_x_bound; x++) {
+        for (int32_t y = lower_y_bound; y < upper_y_bound; y++) {
             indices.emplace(x, y);
         }
     }
diff --git a/src/World/World.hpp b/src/World/World.hpp
index 3453b18..f113bda 100644
--- a/src/World/World.hpp
+++ b/src/World/World.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <memory>
+#include <unordered_map>
 #include <unordered_set>
 #include <utility>
 #include "Generator.hpp"
-- 
cgit 1.4.1