waiting for previous chunk loading before doing next

src/game/mod.rs

@@ -83,29 +83,35 @@ impl Game {
         if self.prev_chunk_pos == None || self.prev_chunk_pos != Some(chunk_pos) {
             renderer.get_ui().set_text("World", 2, format!("Chunk: {}, {}, {}", chunk_pos.x, chunk_pos.y, chunk_pos.z));
             
+            // Wait for previous chunks to be loaded before loading new ones
+            if !self.world.is_busy() {
+                let prev_chunk_pos = self.prev_chunk_pos.unwrap_or(chunk_pos);
+                let mut dir = chunk_pos - prev_chunk_pos;
+                dir.x = dir.x.clamp(-1, 1);
+                dir.y = dir.y.clamp(-1, 1);
+                dir.z = dir.z.clamp(-1, 1);
 
-            let dir = chunk_pos - self.prev_chunk_pos.unwrap_or(chunk_pos); //TODO: clamp to -1,1
                 if dir.x != 0 || dir.y != 0 || dir.z != 0 {
-
                     // Shift world
                     renderer.shift(dir * world::chunk::SIZE as i32);
-
                     // Load chunks at the edge
                     let center = chunk_pos.clone() + RENDER_DIST*dir;
                     let mask = Vector3{x: dir.x.abs(), y: dir.y.abs(), z: dir.z.abs()};
-                println!("Load at {:?}", center);
-
                     for a in -RENDER_DIST..RENDER_DIST+1 {
                         let pos = center + Vector3{x: mask.z*a, y: 0, z: mask.x*a};
                         self.world.load_chunk(pos);
                     }
                 }
-            self.prev_chunk_pos = Some(chunk_pos);
+
+                self.prev_chunk_pos = Some(prev_chunk_pos+dir);
             }
+        }
+
+        // Receives chunks from workers
+        self.world.update();
 
         // Send dirty chunks to renderer
         // TODO: Unload chunks above certain radius
-        self.world.update();
         for (pos, chunk) in self.world.all_chunks() {
             if chunk.dirty {
                 chunk.write_to(renderer, pos * world::chunk::SIZE as i32);

src/game/world/mod.rs

@@ -22,6 +22,7 @@ pub struct World {
     data: WorldData,
     loader: ChunkLoader,
     chunks: HashMap<Vector3<i32>, WorldChunk>,
+    busy: u32
 }
 
 impl World {
@@ -31,18 +32,24 @@ impl World {
             data: WorldData { name: name.clone(), ..Default::default() }, 
             loader: ChunkLoader::new(name.clone()),
             chunks: HashMap::new(),
+            busy: 0,
         };
         instance.load_metadata();
         instance.save_all();
         instance
     }
 
+    pub fn is_busy(&self) -> bool {
+        self.busy > 0
+    }
+
     /*
     *   Receives loaded chunks from ChunkLoader
     */
     pub fn update(&mut self) {
         for (pos, chunk) in self.loader.receive() {
             self.chunks.insert(pos, chunk);
+            self.busy -= 1;
         }
     }
 
@@ -51,6 +58,7 @@ impl World {
     */
     pub fn load_chunk(&mut self, pos: Vector3<i32>) {
         self.loader.load(pos);
+        self.busy += 1;
     }
 
     /*