Improve Performance

mods/CMakeLists.txt

@@ -102,6 +102,8 @@ else()
         # text-input-box
         src/text-input-box/TextInputBox.cpp
         src/text-input-box/TextInputScreen.cpp
+        # fps
+        src/fps/fps.cpp
     )
     # Install Splashes
     install(

mods/include/mods/fps/fps.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern double fps;
+
+#ifdef __cplusplus
+}
+#endif

mods/include/mods/init/init.h

@@ -24,6 +24,7 @@ void init_touch();
 void init_atlas();
 void init_title_screen();
 void init_skin();
+void init_fps();
 #endif
 void init_textures();
 void init_creative();

mods/src/fps/README.md

@@ -0,0 +1,2 @@
+# `fps` Mod
+This mod tracks the game's FPS.

mods/src/fps/fps.cpp

@@ -0,0 +1,54 @@
+#include <libreborn/libreborn.h>
+#include <symbols/minecraft.h>
+
+#include <mods/init/init.h>
+#include <mods/misc/misc.h>
+#include <mods/feature/feature.h>
+#include <mods/fps/fps.h>
+
+// Track FPS
+#define NANOSECONDS_IN_SECOND 1000000000ll
+static long long int get_time() {
+    struct timespec ts;
+    clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
+    long long int a = (long long int) ts.tv_nsec;
+    long long int b = ((long long int) ts.tv_sec) * NANOSECONDS_IN_SECOND;
+    return a + b;
+}
+double fps = 0;
+static void update_fps(__attribute__((unused)) Minecraft *minecraft) {
+    static bool is_last_update_time_set = false;
+    static long long int last_update_time;
+    long long int time = get_time();
+    if (is_last_update_time_set) {
+        long long int update_time = time - last_update_time;
+        fps = ((double) NANOSECONDS_IN_SECOND) / ((double) update_time);
+    } else {
+        is_last_update_time_set = true;
+    }
+    last_update_time = time;
+}
+
+// Print FPS
+static void print_fps(__attribute__((unused)) Minecraft *minecraft) {
+    // Track Ticks
+    static int ticks = 0;
+    ticks++;
+    if (ticks == 20) {
+        // One Second Has Passed, Reset
+        ticks = 0;
+    }
+
+    // Print
+    if (ticks == 0) {
+        INFO("FPS: %f", fps);
+    }
+}
+
+// Init
+void init_fps() {
+    if (feature_has("Track FPS", server_disabled)) {
+        misc_run_on_update(update_fps);
+        misc_run_on_tick(print_fps);
+    }
+}

mods/src/init/init.c

@@ -23,6 +23,7 @@ __attribute__((constructor)) static void init(int argc, char *argv[]) {
     init_atlas();
     init_title_screen();
     init_skin();
+    init_fps();
 #endif
     init_textures();
     init_creative();

mods/src/misc/misc.cpp

@@ -1,6 +1,7 @@
 #include <string>
 #include <fstream>
 #include <streambuf>
+#include <algorithm>
 
 #include <cstring>
 
@@ -90,6 +91,38 @@ ItemInstance *Item_getCraftingRemainingItem_injection(Item *self, ItemInstance *
     return NULL;
 }
 
+// Sort Chunks
+struct chunk_data {
+    Chunk *chunk;
+    float distance;
+};
+#define MAX_CHUNKS_SIZE 24336
+chunk_data data[MAX_CHUNKS_SIZE];
+static void sort_chunks(Chunk **chunks_begin, Chunk **chunks_end, DistanceChunkSorter sorter) {
+    // Calculate Distances
+    int chunks_size = chunks_end - chunks_begin;
+    if (chunks_size > MAX_CHUNKS_SIZE) {
+        IMPOSSIBLE();
+    }
+    for (int i = 0; i < chunks_size; i++) {
+        Chunk *chunk = chunks_begin[i];
+        float distance = Chunk_distanceToSqr(chunk, (Entity *) sorter.mob);
+        if ((1024.0 <= distance) && chunk->y < 0x40) {
+            distance = distance * 10.0;
+        }
+        data[i].chunk = chunk;
+        data[i].distance = distance;
+    }
+
+    // Sort
+    std::sort(data, data + chunks_size, [](chunk_data &a, chunk_data &b) {
+        return a.distance < b.distance;
+    });
+    for (int i = 0; i < chunks_size; i++) {
+        chunks_begin[i] = data[i].chunk;
+    }
+}
+
 // Init
 void _init_misc_cpp() {
     // Implement AppPlatform::readAssetFile So Translations Work
@@ -106,4 +139,7 @@ void _init_misc_cpp() {
     // Implement crafting remainders
     overwrite_call((void *) 0x2e230, (void *) PaneCraftingScreen_craftSelectedItem_PaneCraftingScreen_recheckRecipes_injection);
     overwrite((void *) Item_getCraftingRemainingItem_non_virtual, (void *) Item_getCraftingRemainingItem_injection);
+
+    // Replace 2011 std::sort With Optimized(TM) Code
+    overwrite((void *) 0x51fac, (void *) sort_chunks);
 }

mods/src/title-screen/splashes.txt

@@ -51,3 +51,11 @@ Who is StevePi?
 Why must you hurt me?
 Wow! Modded MCPI!
 mcpi-revival.github.io!
+discord.gg/aDqejQGMMy!
+Buckets!
+Caves!
+Multiplayer!
+Where's my sound?
+Animated Lava!
+Made with Ghidra!
+Python API!

symbols/CMakeLists.txt

@@ -78,6 +78,8 @@ set(SRC
     src/level/Dimension.def
     src/level/MultiPlayerLevel.def
     src/level/LevelSummary.def
+    src/level/DistanceChunkSorter.def
+    src/level/Chunk.def
     src/item/ItemRenderer.def
     src/item/ItemInHandRenderer.def
     src/item/AuxDataTileItem.def

symbols/src/level/Chunk.def

@@ -0,0 +1,5 @@
+property int x = 0x4;
+property int y = 0x8;
+property int z = 0xc;
+
+method float distanceToSqr(Entity *entity) = 0x47ba0;

symbols/src/level/DistanceChunkSorter.def

@@ -0,0 +1,5 @@
+size 0x4;
+
+property Mob *mob = 0x0;
+
+method bool compare(Chunk *param_1, Chunk *param_2) = 0x5118c; // Actually Called _ZN19DistanceChunkSorterclEPK5ChunkS2_