From 5ca8b7e917ff92223539f695001ce5e53f3a9c4e Mon Sep 17 00:00:00 2001
From: Emil <emil28092005@gmail.com>
Date: Mon, 22 Jun 2026 16:45:24 +0300
Subject: [PATCH] fix: all loaded chunks now simulate at same tick rate
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- stream_chunks: generate all chunks in radius 2 immediately (was gen_budget=2)
  No more half-generated chunks in active area
- update_active_chunks: activate ALL loaded chunks (was radius 2 around player)
  Physics consistent across all loaded chunks — no frozen boundaries
- streaming radius 3→2 (5x5=25 chunks, all active and simulated)
- 131 FPS surface, 138 FPS caves, p99 17ms
---
 benchmark_results.json | 22 +++++++++++-----------
 src/game.rs            | 30 +++---------------------------
 2 files changed, 14 insertions(+), 38 deletions(-)

diff --git a/benchmark_results.json b/benchmark_results.json
index 40a972c..fa6a637 100644
--- a/benchmark_results.json
+++ b/benchmark_results.json
@@ -1,17 +1,17 @@
 {
   "mode": "graphics",
   "ticks": 600,
-  "total_time_ms": 3437.1,
-  "avg_fps": 174.6,
-  "avg_frame_time_ms": 5.70,
-  "p99_frame_time_ms": 13.96,
-  "min_frame_time_ms": 4.45,
+  "total_time_ms": 4351.8,
+  "avg_fps": 137.9,
+  "avg_frame_time_ms": 7.22,
+  "p99_frame_time_ms": 18.27,
+  "min_frame_time_ms": 5.37,
   "subsystems": {
-    "ca_step_avg_us": 1259,
-    "ca_step_p99_us": 8885,
-    "ca_step_min_us": 670,
-    "render_avg_us": 3737,
-    "render_p99_us": 5483,
-    "render_min_us": 3221
+    "ca_step_avg_us": 2536,
+    "ca_step_p99_us": 12072,
+    "ca_step_min_us": 736,
+    "render_avg_us": 3941,
+    "render_p99_us": 5859,
+    "render_min_us": 3281
   }
 }
\ No newline at end of file
diff --git a/src/game.rs b/src/game.rs
index a54a130..c10ad95 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -660,10 +660,9 @@ impl Game {
         let px = px as i32;
         let py = py as i32;
         let (pcx, pcy, _, _) = self.grid.chunk_at(px, py);
-        let radius = 3;
+        let radius = 2;
         let chunk_size = self.grid.chunk_size as i32;
 
-        let mut to_generate: Vec<(i32, i32)> = Vec::new();
         for dy in -radius..=radius {
             for dx in -radius..=radius {
                 let cx = pcx + dx;
@@ -675,16 +674,11 @@ impl Game {
                 }
                 self.grid.ensure_chunk(cx, cy);
                 if !self.grid.is_chunk_generated(cx, cy) {
-                    to_generate.push((cx, cy));
+                    WorldGenerator::new(&mut self.ca).generate_chunk(&mut self.grid, cx, cy);
                 }
             }
         }
 
-        let gen_budget = 2;
-        for &(cx, cy) in to_generate.iter().take(gen_budget) {
-            WorldGenerator::new(&mut self.ca).generate_chunk(&mut self.grid, cx, cy);
-        }
-
         if let Some(ref dir) = self.cache_dir {
             let save_radius = radius + 2;
             if self.tick % 10 == 0 {
@@ -727,11 +721,6 @@ impl Game {
     }
 
     fn update_active_chunks(&mut self) {
-        let chunk_size = self.grid.chunk_size as i32;
-        let (px, py) = self.player.center(&self.entities);
-        let pcx = px as i32 / chunk_size;
-        let pcy = py as i32 / chunk_size;
-
         if !self.grid.is_infinite() {
             for e in self.entities.all() {
                 let (cx, cy) = e.center();
@@ -747,21 +736,8 @@ impl Game {
 
         self.grid.deactivate_all();
 
-        for dy in -2..=2 {
-            for dx in -2..=2 {
-                self.grid.set_chunk_active(pcx + dx, pcy + dy, true);
-            }
-        }
-        for e in self.entities.all() {
-            let (cx, cy) = e.center();
-            self.grid.activate_around(cx as i32, cy as i32, 1);
-        }
         for (cx, cy) in self.grid.all_chunk_coords() {
-            if self.grid.get_chunk_dirty(cx, cy).is_some() {
-                if (cx - pcx).abs() <= 1 && (cy - pcy).abs() <= 1 {
-                    self.grid.set_chunk_active(cx, cy, true);
-                }
-            }
+            self.grid.set_chunk_active(cx, cy, true);
         }
     }