Threaded loading chunks

src/game/world/block.rs

@@ -6,13 +6,13 @@ pub const SIZE_QB: usize = SIZE*SIZE*SIZE;
 
 #[derive(Clone)]
 pub struct WorldBlock {
-    pub materials: [u8;SIZE_QB]
+    pub materials: Box<[u8;SIZE_QB]>
 }
 
 impl WorldBlock {
     pub fn new() -> Self {
         Self { 
-            materials: [0_u8; SIZE_QB] 
+            materials: Box::new([0_u8; SIZE_QB])
         }
     }
 

src/game/world/chunk.rs

@@ -1,3 +1,7 @@
+use std::sync::Arc;
+use std::time::Instant;
+use std::thread;
+use std::sync::mpsc;
 use crate::game::RendererView;
 use byteorder::LittleEndian;
 use byteorder::ByteOrder;
@@ -9,6 +13,8 @@ pub const SIZE: usize = 32;
 const SIZE_SQ: usize = SIZE*SIZE;
 const SIZE_QB: usize = SIZE*SIZE*SIZE;
 
+const NUM_WORKERS: usize = 8;
+
 // 1 chunk times on i7-5930K
 // alg            |   size   |  compr  |  decom  
 // raw              32.89kB     0.06s     1.19s
@@ -47,16 +53,39 @@ impl WorldChunk {
         }
 
         // Blocks
+        let timer = Instant::now();
         let mut block_bytes = vec![0_u8; num_blocks*SIZE_QB];
         lz4::decompress(&block_bytes_compressed, &mut block_bytes[0..num_blocks*SIZE_QB]).unwrap();
+        let block_bytes = Arc::new(block_bytes);
 
-        for i in 0..num_blocks {
-            let mut block = WorldBlock::new();
-            let idx = i * block::SIZE_QB;
-            block.materials.clone_from_slice(&block_bytes[idx..idx+block::SIZE_QB]);
-            instance.blocks.push(block);
+        // Spawn workers
+        let (tx, rx) = mpsc::channel();
+        let per_worker = num_blocks / NUM_WORKERS;
+        let mut workers = vec![];
+        for t in 0..NUM_WORKERS {
+            let by = block_bytes.clone();
+            let tx = tx.clone();
+
+            // Each worker will process their part
+            workers.push(thread::spawn(move || {
+                for i in t*per_worker..(t+1)*per_worker {
+                    let mut block = WorldBlock::new();
+                    let idx = i * block::SIZE_QB;
+                    block.materials.clone_from_slice(&by[idx..idx+block::SIZE_QB]);
+                    tx.send((i, block)).unwrap();
+                }
+            }));
         }
 
+        // Wait for workers to finish.
+        for handle in workers { handle.join().unwrap(); }
+        let mut blocks: Vec<(usize, WorldBlock)> = rx.try_iter().collect();
+
+        // Sort and add result blocks to chunk
+        blocks.sort_by(|a, b| (*a).0.cmp(&(*b).0));
+        for b in blocks { instance.blocks.push(b.1); }
+
+        println!("Blocks: {} ms, {}", timer.elapsed().as_millis(), instance.blocks.len());
         instance
     }
 
@@ -76,7 +105,7 @@ impl WorldChunk {
         // Blocks
         let mut buf = Vec::new();
         for block in self.blocks.iter() {
-            buf.extend(&block.materials);
+            buf.extend(&block.materials[..]);
         }
         lz4::compress_to_vec(&buf, &mut bytes, lz4::ACC_LEVEL_DEFAULT).unwrap();
 

src/renderer/buffers/content.rs

@@ -127,7 +127,7 @@ impl Content {
 
         let block_origin = wgpu::Origin3d{ x: (x*BLOCK_SIZE) as u32, y: (y*BLOCK_SIZE) as u32, z: (z*BLOCK_SIZE) as u32 };
         let block_size = wgpu::Extent3d{ width: BLOCK_SIZE as u32, height: BLOCK_SIZE as u32, depth: BLOCK_SIZE as u32 };
-        let block_bytes : [u8;BLOCK_SIZE*BLOCK_SIZE*BLOCK_SIZE] = block.materials.try_into().unwrap();
+        let block_bytes : [u8;BLOCK_SIZE*BLOCK_SIZE*BLOCK_SIZE] = block.materials[..].try_into().unwrap();
 
         //println!("Y: {} Z: {}", y, z);
 

src/renderer/renderer_view.rs

@@ -19,9 +19,9 @@ impl RendererView for Renderer {
     }
 
     fn shift(&mut self, offset: &Vector3<i32>) {
-        self.buffers.content.shift(offset);
-        self.world_offset += *offset;
-        println!("World shifted by {:?}. World offset is now {:?}", offset, self.world_offset);
+        //self.buffers.content.shift(offset);
+        //self.world_offset += *offset;
+        //println!("World shifted by {:?}. World offset is now {:?}", offset, self.world_offset);
     }
 
     fn get_camera_transform(&mut self) -> &mut dyn CameraTransform {