Loading world, not working yet

src/app/mod.rs

@@ -27,19 +27,24 @@ impl App {
             world: World::new("default".to_string())
         };
 
-        let timer = Instant::now();
+
-        for x in 0..16 {
+        // let timer = Instant::now();
-            for z in 0..16 {
+        // for x in 0..16 {
-                let pos = &Point3{x,y:0,z};
+        //     for z in 0..16 {
-                let block = app.world.gen_block(pos);
+        //         let pos = &Point3{x,y:0,z};
-                content.write(pos, block);
+        //         let block = app.world.gen_block(pos);
-            }
+        //         content.write(pos, block);
-        }
+        //     }
-        println!("Generated in {}", timer.elapsed().as_secs_f32());
+        // }
+        // println!("Generated in {}", timer.elapsed().as_secs_f32());
         
+        // let timer = Instant::now();
+        // app.world.save();
+        // println!("Saved in {}", timer.elapsed().as_secs_f32());
+
         let timer = Instant::now();
-        app.world.save();
+        app.world.load();
-        println!("Saved in {}", timer.elapsed().as_secs_f32());
+        println!("Loaded in {}", timer.elapsed().as_secs_f32());
 
         // let pos = &Point3{x:1,y:0,z:0};
         // let block = app.world.gen_block(pos);

src/app/world/block.rs

@@ -4,17 +4,18 @@ use std::io::Write;
 use flate2::{write::DeflateEncoder, Compression};
 
 pub const SIZE: usize = 32;
+pub const SIZE_QB: usize = SIZE*SIZE*SIZE;
 
 
 #[derive(Clone)]
 pub struct WorldBlock {
-    pub materials: [u8;(SIZE*SIZE*SIZE) as usize]
+    pub materials: [u8;SIZE_QB]
 }
 
 impl WorldBlock {
     pub fn new() -> Self {
         Self { 
-            materials: [0_u8; (SIZE*SIZE*SIZE) as usize] 
+            materials: [0_u8; SIZE_QB] 
         }
     }
 

src/app/world/chunk.rs

@@ -1,13 +1,15 @@
 use flate2::Compression;
 use flate2::write::DeflateEncoder;
+use flate2::read::DeflateDecoder;
 use byteorder::LittleEndian;
 use byteorder::ByteOrder;
 use cgmath::Point3;
 use std::io::Write;
-use crate::app::world::WorldBlock;
+use std::convert::TryInto;
+use crate::app::world::{WorldBlock, block};
 
 pub const SIZE: u32 = 32;
-
+const SIZE_QB: u32 = SIZE*SIZE*SIZE;
 
 pub struct WorldChunk {
     nodes: Box<[u32]>,
@@ -17,7 +19,7 @@ pub struct WorldChunk {
 impl WorldChunk {
     pub fn new() -> Self {
         Self { 
-            nodes: vec![0_u32; (SIZE*SIZE*SIZE) as usize].into_boxed_slice(),
+            nodes: vec![0_u32; SIZE_QB as usize].into_boxed_slice(),
             blocks: Vec::new()
         }
     }
@@ -40,17 +42,46 @@ impl WorldChunk {
         let mut bytes = Vec::with_capacity(self.nodes.len()*4 + self.blocks.len()* 32*32*32);
         
         // Nodes
-        let mut node_bytes = [0_u8; (SIZE*SIZE*SIZE*4) as usize];
+        let mut node_bytes = [0_u8; (SIZE_QB*4) as usize];
         LittleEndian::write_u32_into(&self.nodes, &mut node_bytes);
         bytes.extend(node_bytes.iter());
 
         // Blocks
-        let mut encoder = DeflateEncoder::new(Vec::new(), Compression::fast());
+        // let mut encoder = DeflateEncoder::new(Vec::new(), Compression::fast());
+        // for block in self.blocks.iter() {
+        //     encoder.write_all(&block.materials).unwrap();
+        // }
+        // bytes.extend(encoder.finish().unwrap());
+
         for block in self.blocks.iter() {
-            encoder.write_all(&block.materials).unwrap();
+            bytes.extend(&block.materials);
         }
-        bytes.extend(encoder.finish().unwrap());
     
         bytes
     }
+
+    pub fn from_bytes(bytes: Vec<u8>) -> Self {
+        let mut instance = Self::new();
+        let (node_bytes, block_bytes) = bytes.split_at((SIZE_QB*4) as usize);
+
+        // Nodes
+        for i in 0..SIZE_QB {
+            let idx = (i*4) as usize;
+            instance.nodes[i as usize] = u32::from_le_bytes([node_bytes[idx], node_bytes[idx+1], node_bytes[idx+2], node_bytes[idx+3]]);
+        }
+
+        // Blocks
+        let block_num = block_bytes.len() / block::SIZE_QB;
+        println!("block_num {}", block_num);
+        for i in 0..block_num {
+            let mut block = WorldBlock::new();
+            let idx = i * block::SIZE_QB;
+            for j in 0..block::SIZE_QB {
+                block.materials[j] = block_bytes[idx+j];
+            }
+            instance.blocks.push(block);
+        }
+
+        instance
+    }
 }

src/app/world/mod.rs

@@ -4,6 +4,7 @@ pub mod block;
 use std::path::PathBuf;
 use std::path::Path;
 use std::io::Write;
+use std::io::Read;
 use std::fs;
 use cgmath::Point3;
 use std::collections::HashMap;
@@ -42,6 +43,39 @@ impl World {
         }
     }
 
+    pub fn load(&mut self) {
+        // Get directory
+        let mut dir = dirs::data_local_dir().unwrap();
+        dir.push("Voxelgame");
+        if !dir.is_dir() {
+            println!("Not exists: {:?}", dir);
+            return; 
+        }
+
+        // Load all chunks
+        for entry in fs::read_dir(dir).unwrap() {
+            let path: PathBuf = entry.unwrap().path();
+            if path.extension().unwrap().to_str() != Some("dat") {
+                continue;
+            }
+            let stem = path.file_stem().unwrap().to_str().unwrap();
+            if !stem.starts_with("chunk") {
+                continue;
+            }
+
+            let s: Vec<&str> = stem.split("_").collect();
+            let pos = Point3{x: s[1].parse::<u32>().unwrap(), y: s[2].parse::<u32>().unwrap(), z: s[3].parse::<u32>().unwrap()};
+
+            let mut bytes = Vec::new();
+            let mut file = fs::File::open(path).expect("Failed to open file");
+            file.read_to_end(&mut bytes).expect("Failed to read file");
+            let chunk = WorldChunk::from_bytes(bytes);
+
+            println!("loaded {:?}", pos);
+            self.chunks.insert(pos, chunk);
+        }
+    }
+
     pub fn gen_block(&mut self, block_pos: &Point3<u32>) -> &WorldBlock {
         // Split world space to chunk and block space
         let ch_pos = block_pos / chunk::SIZE;