why are the tiles still 24bytes...

game/game.odin

@@ -11,30 +11,32 @@ import "core:strings"
 player : Player
 world : World
 
-camera : rl.Camera2D
-
 main :: proc() {
 
     rl.InitWindow(1280, 720, "Odin game")
+    
     flags : rl.ConfigFlags = {.VSYNC_HINT} 
     rl.SetConfigFlags(flags)
 
     rl.SetTargetFPS(60)
 
-    player.position.x = CELL_SIZE * 5
-    player.position.y = CELL_SIZE * 5
-    player.mode = .INTERACT
-
-    camera.target = {player.position.x + (CELL_SIZE / 2), player.position.y + (CELL_SIZE / 2)}
-    camera.zoom = 2
-    camera.offset = {f32(rl.GetScreenWidth()) / 2, f32(rl.GetScreenHeight()) / 2}
+    player = {
+        position = {CELL_SIZE * 5, CELL_SIZE * 5},
+        camera = {
+            zoom = 2,
+            target = {player.position.x + (CELL_SIZE / 2), player.position.y + (CELL_SIZE / 2)},
+            offset = {f32(rl.GetScreenWidth()) / 2, f32(rl.GetScreenHeight()) / 2},
+        },
+        mode = .INTERACT,
+    }
 
     load_tilemap()
     defer unload_tilemap()
 
-    fill_world_grid_with_nothing(&world)
+    world = create_world("test_world")
+    load_nearby_chunks(&world, player.position)
+    save_world(&world)
 
-    place_random_trees(&world)
 
     game_loop()
 }
@@ -50,7 +52,7 @@ game_loop :: proc() {
 
         rl.BeginDrawing()
         rl.ClearBackground(rl.BLACK)
-        rl.BeginMode2D(camera)
+        rl.BeginMode2D(player.camera)
 
         draw()
 
@@ -59,7 +61,7 @@ game_loop :: proc() {
         rl.DrawFPS(5,5)
 
         player_grid_pos := get_player_grid_position(&player)
-        player_grid_pos_tile := get_grid_tile(&world, vec2_to_vec2i(player_grid_pos))
+        player_grid_pos_tile := get_world_tile(&world, vec2_to_vec2i(player_grid_pos))
         status_string := rl.TextFormat("POS: %v : %v | MODE: %v", player_grid_pos, player_grid_pos_tile.type, player.mode)
 
         rl.DrawText(status_string, 5, 25, 20, rl.RED)
@@ -73,11 +75,7 @@ game_loop :: proc() {
 }
 
 update :: proc() {
-    
-    handle_player_input(&player, &world)
-    handle_window_resize()
-    camera.target = {player.position.x + (CELL_SIZE / 2), player.position.y + (CELL_SIZE / 2)}
-
+    player_update(&player, &world)
 }
 
 draw :: proc() {
@@ -85,16 +83,3 @@ draw :: proc() {
     draw_player(&player)
 }
 
-handle_window_resize :: proc() {
-    if rl.IsWindowResized() {
-        camera.offset = {f32(rl.GetScreenWidth()) / 2, f32(rl.GetScreenHeight()) / 2}
-    }
-}
-
-print_grid :: proc() {
-    for x in 0..< len(world.grid) {
-        for y in 0..< len(world.grid) {
-            fmt.printfln("[%d, %d] %v", x, y, world.grid[x][y].type)
-        }
-    } 
-}

game/math.odin

@@ -1,8 +1,8 @@
 package game
 
 Vec2i :: struct {
-    x: u32,
-    y:u32,
+    x: int,
+    y: int,
 }
 
 vec2i_to_vec2 :: proc(v2i:Vec2i) -> [2]f32 {
@@ -10,5 +10,43 @@ vec2i_to_vec2 :: proc(v2i:Vec2i) -> [2]f32 {
 }
 
 vec2_to_vec2i :: proc(v2:[2]f32) -> Vec2i {
-    return {u32(v2.x), u32(v2.y)}
+    return {int(v2.x), int(v2.y)}
+}
+
+serialize_vec2i :: proc(v:Vec2i) -> [8]byte {
+    data: [8]byte
+    
+    x := serialize_int(v.x)
+    y := serialize_int(v.y)
+
+    for i in 0..<4 {
+        data[i] = x[i]
+    }
+
+    for i in 0..<4 {
+        data[4 + i] = y[i]
+    }
+    
+    return data
+}
+
+deserialize_vec2i :: proc(data:[]byte) -> Vec2i {
+    x := deserialize_int(data[0:4])
+    y := deserialize_int(data[4:8])
+    return Vec2i{x,y}
+}
+
+serialize_int :: proc(v:int) -> [4]byte {
+    data : [4]byte 
+
+    data[0] = byte(v)
+    data[1] = byte(v >> 8)
+    data[2] = byte(v >> 16)
+    data[3] = byte(v >> 24)
+
+    return data
+}
+
+deserialize_int :: proc(data:[]byte) -> int {
+    return int(data[0]) | int(data[1]) << 8 | int(data[2]) << 16 | int(data[3]) << 24 
 }

game/player.odin

@@ -3,10 +3,13 @@ package game
 import rl "vendor:raylib"
 import "core:fmt"
 
+CHUNK_UNLOAD_DISTANCE :: 3
+
 Player :: struct {
     position : rl.Vector2,
     move_timer: f32,
-    mode: InteractMode
+    mode: InteractMode,
+    camera: rl.Camera2D
 }
 
 InteractMode :: enum {
@@ -14,8 +17,46 @@ InteractMode :: enum {
     ATTACK,
 }
 
-handle_player_input :: proc(p : ^Player, w: ^World) {
+handle_player_camera :: proc(p:^Player) {
+    p.camera.target = {p.position.x + (CELL_SIZE / 2), p.position.y + (CELL_SIZE / 2)}
 
+    if rl.IsWindowResized() {
+        p.camera.offset = {f32(rl.GetScreenWidth()) / 2, f32(rl.GetScreenHeight()) / 2}
+    }
+}
+
+player_update :: proc(p : ^Player, w: ^World) {
+    handle_player_input(p,w)
+    handle_player_camera(p)
+
+    
+}
+
+load_nearby_chunks :: proc(w:^World, player_pos:rl.Vector2) {
+    player_chunk_pos := world_pos_to_chunk_pos(player_pos)
+
+    chunk_radius := 2 // Adjust based on the camera size
+
+    for x := -chunk_radius; x <= chunk_radius; x += 1 {
+        for y := -chunk_radius; y <= chunk_radius; y += 1 {
+            chunk_pos := Vec2i{player_chunk_pos.x + x, player_chunk_pos.y + y}
+            get_chunk(w, chunk_pos) // Ensures chunk is loaded or generated
+        }
+    }
+}
+
+unload_far_chunks :: proc(w: ^World, player_pos: Vec2i) {
+    for chunk_pos in w.chunks {
+        dist_x := abs(chunk_pos.x - player_pos.x)
+        dist_y := abs(chunk_pos.y - player_pos.y)
+
+        if dist_x > CHUNK_UNLOAD_DISTANCE || dist_y > CHUNK_UNLOAD_DISTANCE {
+            unload_chunk(chunk_pos, w)
+        }
+    }
+}
+
+handle_player_input :: proc(p:^Player, w:^World) {
     target_pos := get_player_grid_position(p)
 
     dt := rl.GetFrameTime()
@@ -31,33 +72,41 @@ handle_player_input :: proc(p : ^Player, w: ^World) {
     if p.move_timer <= 0 {
         if rl.IsKeyDown(.D) {
             target_pos.x += 1
-            if !will_collide(target_pos, w) {
+            if !will_collide(w, target_pos) {
                 player.position.x += CELL_SIZE
                 p.move_timer = move_delay
+                load_nearby_chunks(w, p.position)
+                unload_far_chunks(w, vec2_to_vec2i(p.position))
             }
         }
 
         if rl.IsKeyDown(.A) {
             target_pos.x -= 1
-            if !will_collide(target_pos, w) {
+            if !will_collide(w, target_pos) {
                 player.position.x -= CELL_SIZE
                 p.move_timer = move_delay
+                load_nearby_chunks(w, p.position)
+                unload_far_chunks(w, vec2_to_vec2i(p.position))
             }
         }
 
         if rl.IsKeyDown(.W) {
             target_pos.y -= 1
-            if !will_collide(target_pos, w) {
+            if !will_collide(w, target_pos) {
                 player.position.y -= CELL_SIZE
                 p.move_timer = move_delay
+                load_nearby_chunks(w, p.position)
+                unload_far_chunks(w, vec2_to_vec2i(p.position))
             }
         }
 
         if rl.IsKeyDown(.S) {
             target_pos.y += 1
-            if !will_collide(target_pos, w) {
+            if !will_collide(w, target_pos) {
                 p.move_timer = move_delay
                 player.position.y += CELL_SIZE
+                load_nearby_chunks(w, p.position)
+                unload_far_chunks(w, vec2_to_vec2i(p.position))            
             }
         }
     }
@@ -74,12 +123,13 @@ draw_player :: proc(player:^Player) {
     draw_tile({27,0}, player.position, rl.DARKBLUE)
 }
 
-will_collide :: proc(pos:rl.Vector2, w:^World) -> bool {
-    if pos.y > WORLD_SIZE * CELL_SIZE || pos.x > WORLD_SIZE * CELL_SIZE {
-        return false
-    }
+will_collide :: proc(w:^World, pos:rl.Vector2) -> bool {
+    world_grid_pos := vec2_to_vec2i(pos)
+    chunk_pos := world_pos_to_chunk_pos(pos)
+    local_pos := get_local_chunk_pos(world_grid_pos)
 
-    tile := get_grid_tile(w, vec2_to_vec2i(pos))
+    chunk := get_chunk(w, chunk_pos)
+    tile := get_chunk_tile(chunk, local_pos)
 
     #partial switch tile.type {
     case .WALL:

game/tiles.odin

@@ -3,21 +3,132 @@ package game
 import rl "vendor:raylib"
 import "core:math/rand"
 
+Tile :: struct #packed {
+    tilemap_pos: Vec2i,
+    color: rl.Color,
+    type: TileType,
+    interaction: InteractionType,
+    resource: ResourceType,
+}
+
+TileType :: enum {
+    NOTHING,
+    WALL,
+    FOLIAGE,
+}
+
+ResourceType :: enum {
+    NOTHING,
+    TREE,
+}
+
+InteractionType :: enum {
+    NOTHING,
+    RESOURCE,
+    ENEMY,
+}
+serialize_tile :: proc(t: Tile) -> []byte {
+    data: [dynamic]byte
+
+    // Tilemap Pos (16 bytes)
+    tilemap_pos_bytes := serialize_vec2i(t.tilemap_pos)
+    append(&data, ..tilemap_pos_bytes[:])
+
+    // Color (4 bytes)
+    append(&data, byte(t.color.r), byte(t.color.g), byte(t.color.b), byte(t.color.a))
+
+    // TileType (8 bytes)
+    tile_type_bytes := serialize_int(int(t.type))
+    append(&data, ..tile_type_bytes[:])
+
+    // Interaction Type (8 bytes)
+    interaction_bytes := serialize_int(int(t.interaction))
+    append(&data, ..interaction_bytes[:])
+
+    // Resource Type (8 bytes)
+    resource_bytes := serialize_int(int(t.resource))
+    append(&data, ..resource_bytes[:])
+
+    return data[:]
+}
+
+deserialize_tile :: proc(data: []byte) -> Tile {
+    t: Tile
+
+    // Tilemap Pos (16 bytes)
+    t.tilemap_pos = deserialize_vec2i(data[0:16])
+
+    // Color (4 bytes)
+    t.color.r = u8(data[16])
+    t.color.g = u8(data[17])
+    t.color.b = u8(data[18])
+    t.color.a = u8(data[19])
+
+    // TileType (8 bytes)
+    t.type = TileType(deserialize_int(data[20:28]))
+
+    // Interaction Type (8 bytes)
+    t.interaction = InteractionType(deserialize_int(data[28:36]))
+
+    // Resource Type (8 bytes)
+    t.resource = ResourceType(deserialize_int(data[36:44]))
+
+    return t
+}
+
+// serialize_tile :: proc(t: Tile) -> []byte {
+//     data: [dynamic]byte
+
+//     // TileType
+//     tile_type_bytes := serialize_int(int(t.type))
+//     append(&data, ..tile_type_bytes[:])
+
+//     // Tilemap Pos
+//     tilemap_pos_bytes := serialize_vec2i(t.tilemap_pos)
+//     append(&data, ..tilemap_pos_bytes[:])
+
+//     // Color
+//     append(&data, byte(t.color.r), byte(t.color.g), byte(t.color.b), byte(t.color.a))
+
+//     // Interaction Type
+//     interaction_bytes := serialize_int(int(t.interaction))
+//     append(&data, ..interaction_bytes[:])
+
+//     // Resource Type
+//     resource_bytes := serialize_int(int(t.resource))
+//     append(&data, ..resource_bytes[:])
+
+//     return data[:]
+// }
+
+// deserialize_tile :: proc(data:[]byte) -> Tile {
+//     t: Tile
+
+//     // TileType
+//     t.type = TileType(deserialize_int(data[0:4]))
+
+//     // TilemapPos
+//     t.tilemap_pos = deserialize_vec2i(data[4:12])
+
+//     // Color
+//     t.color.r = u8(data[12])
+//     t.color.g = u8(data[13])
+//     t.color.b = u8(data[14])
+//     t.color.a = u8(data[15])
+
+//     // ResourceType
+//     t.resource = ResourceType(deserialize_int(data[16:20]))
+
+//     // InteractionType
+//     t.interaction = InteractionType(deserialize_int(data[20:24]))
+
+//     return t
+// }
+
 tree_tile := Tile {
     type = .WALL,
     tilemap_pos = {0,1},
-    color = rl.DARKGREEN
-}
-
-place_random_trees :: proc(w:^World) {
-    for x in 0..< len(w.grid) {
-        for y in 0..< len(w.grid) {
-
-            chance := rand.int_max(100)
-            
-            if chance <= 5 {
-                w.grid[x][y] = tree_tile
-            }
-        }
-    }
+    color = rl.DARKGREEN,
+    resource = .TREE,
+    interaction = .RESOURCE,
 }

game/world.odin

@@ -2,61 +2,266 @@ package game
 
 import rl "vendor:raylib"
 import "core:fmt"
-
+import "core:os"
+import "core:path/filepath"
 
 CELL_SIZE :: 16
-WORLD_SIZE :: 100
+CHUNK_SIZE :: 32
+WORLD_DATA_PATH :: "data/worlds"
 
 World :: struct {
-    grid: [WORLD_SIZE][WORLD_SIZE]Tile
+    data_dir: string,
+    chunks: map[Vec2i]Chunk
 }
 
-Tile :: struct {
-    type: TileType,
-    tilemap_pos:rl.Vector2,
-    color:rl.Color,
+Chunk :: struct #packed {
+    position: Vec2i,
+    tiles: [CHUNK_SIZE][CHUNK_SIZE]Tile,
 }
 
-TileType :: enum {
-    NOTHING,
-    WALL,
-    DOOR,
-    FLOOR,
-} 
-
-set_grid_tile :: proc(w:^World, pos:Vec2i, t:Tile) {
-    w.grid[pos.x][pos.y] = t
-}
-
-get_grid_tile :: proc(w: ^World, pos: Vec2i) -> Tile {
-    if pos.x < 0 || pos.x >= len(w.grid) || pos.y < 0 || pos.y >= len(w.grid[0]) {
-        // fmt.printfln("Target [%v] outside of world bounds", pos)
-        return w.grid[0][0] // Default or error tile
+create_world :: proc(name:string) -> World {
+    data_dir := fmt.tprintf("%v/%v", WORLD_DATA_PATH, name)
+    if !os.is_dir(data_dir) {
+        fmt.printfln("Data dir: %v does not exist", data_dir)
+        os.make_directory(data_dir)
+    }
+
+    chunk_dir := fmt.tprintf("%v/%v", data_dir, "chunks")
+    if !os.is_dir(chunk_dir) {
+        os.make_directory(chunk_dir)
+    }
+
+    return World {
+        data_dir = data_dir,
+        chunks = make(map[Vec2i]Chunk), 
     }
-    return w.grid[pos.x][pos.y]
 }
 
-fill_world_grid_with_nothing :: proc(w:^World) {
-    for x in 0..< len(w.grid) {
-        for y in 0..<len(w.grid) {
-            w.grid[x][y] = Tile {
-                type = .NOTHING,
-                tilemap_pos = {0,0}
+load_world :: proc(name:string) -> World {
+    dir := fmt.tprintf("%v/%v", WORLD_DATA_PATH, name)
+    if !os.is_dir(dir) {
+        panic("Couldnt load world")
+    }
+
+    return World {
+        data_dir = dir,
+        chunks = make(map[Vec2i]Chunk),
+    }
+}
+
+save_world :: proc(w:^World) {
+    if !os.is_dir(w.data_dir) {
+        panic("World has invalid data_path")
+    }
+
+    fmt.printfln("Saving world %v", w.data_dir)
+
+    for chunk in w.chunks {
+        save_chunk(get_chunk(w, chunk), w)
+    }
+}
+
+serialize_chunk :: proc(c:^Chunk) -> []byte {
+    data : [dynamic]byte
+
+    // Position
+    pos_bytes := serialize_vec2i(c.position)
+    append(&data, ..pos_bytes[:])
+
+    // Tiles
+    for y in 0..<CHUNK_SIZE {
+        for x in 0..<CHUNK_SIZE {
+            tile_bytes := serialize_tile(c.tiles[x][y])
+            fmt.printfln("Serialized tile size: %v", len(tile_bytes))
+            append(&data, ..tile_bytes[:])
+        }
+    }
+
+    fmt.printfln("Serialized chunk size: %v", len(data)) // Print final serialized size
+    fmt.printfln("Before serialization, Chunk position: %v", c.position)
+    return data[:]
+}
+
+
+deserialize_chunk :: proc(data: []byte) -> Chunk {
+    chunk: Chunk
+
+    // Position
+    chunk.position = deserialize_vec2i(data[0:8])
+
+    // Tiles
+    offset := 8
+    tile_size := size_of(Tile)
+
+    // Check total expected size of data
+    expected_size := offset + (CHUNK_SIZE * CHUNK_SIZE * tile_size)
+    if len(data) != expected_size {
+        fmt.printfln("Error: Data size mismatch. Expected size: %v, Actual size: %v", expected_size, len(data))
+        fmt.printfln("Chunk position: %v", chunk.position)
+
+        return chunk // Return empty or invalid chunk to handle the error.
+    }
+
+    for y in 0..<CHUNK_SIZE {
+        for x in 0..<CHUNK_SIZE {
+            start := offset + (y * CHUNK_SIZE + x) * tile_size
+            end := start + tile_size
+
+            fmt.printfln("Start:%v, End:%v", start, end)
+
+            if end > len(data) {
+                fmt.printfln("Out of bounds access. Start:%v, End:%v | Data Length: %v", start, end, len(data))
+                break
+            }
+
+            chunk.tiles[x][y] = deserialize_tile(data[start:end])
+        }
+    }
+
+    fmt.printfln("Expected chunk size: %v | Serialized chunk data size: %v", size_of(Chunk), len(data))
+
+    return chunk
+}
+
+
+save_chunk :: proc(c:^Chunk, w:^World) {
+    chunk_dir := fmt.tprintf("%v/%v", w.data_dir, "chunks")
+    if !os.is_dir(chunk_dir) {
+        os.make_directory(chunk_dir)
+    }
+
+    filename := fmt.tprintf("%v/%v_%v.chunk", chunk_dir, c.position.x, c.position.y)
+
+    data := serialize_chunk(c)
+
+    fmt.printfln("Writing chunk data: %v bytes", len(data))
+
+    
+    err := os.write_entire_file_or_err(filename, data)
+
+    if err != nil {
+        fmt.printfln("Failed to save chunk: %v", err)
+    }
+}
+
+load_chunk :: proc(pos:Vec2i, w:^World) -> Chunk {
+    chunk_dir := fmt.tprintf("%v/%v", w.data_dir, "chunks")
+    if !os.is_dir(chunk_dir) {
+        
+    }
+
+    filename := fmt.tprintf("%v/%v_%v.chunk", chunk_dir, pos.x, pos.y)
+    
+    data, err := os.read_entire_file_from_filename_or_err(filename)
+
+    if err != nil {
+        fmt.printfln("Chunk %v file does not exist, creating new chunk", pos)
+        return generate_chunk(pos)
+    } 
+
+    return deserialize_chunk(data)
+}
+
+unload_chunk :: proc(pos:Vec2i, w:^World) {
+    _, exists := w.chunks[pos]
+    if exists {
+        save_chunk(get_chunk(w, pos), w)
+        delete_key(&w.chunks, pos)
+    } 
+}
+
+
+generate_chunk :: proc(pos:Vec2i) -> Chunk {
+    chunk := Chunk {position = pos}
+
+    for x in 0..<CHUNK_SIZE {
+        for y in 0..<CHUNK_SIZE {
+            chunk.tiles[x][y] = Tile {
+                type = .FOLIAGE,
+                tilemap_pos = {0,2},
+                interaction = .NOTHING,
+                resource = .NOTHING,
+                color = rl.GREEN
             }
         }
     }
+
+    center_pos := Vec2i{CHUNK_SIZE/2, CHUNK_SIZE/2}
+    // set_chunk_tile(&chunk, tree_tile, center_pos)
+
+    return chunk
+}
+
+get_chunk :: proc(w:^World, chunk_pos:Vec2i) -> ^Chunk {
+    chunk, exists := w.chunks[chunk_pos]
+    if !exists {
+        w.chunks[chunk_pos] = load_chunk(chunk_pos, w)
+    }
+    return &w.chunks[chunk_pos]
+}
+
+get_chunk_from_world_pos :: proc(w:^World, pos:rl.Vector2) -> ^Chunk {
+    chunk_pos := world_pos_to_chunk_pos(pos)
+    return get_chunk(w, chunk_pos)
+}
+
+world_pos_to_chunk_pos :: proc(pos:rl.Vector2) -> Vec2i {
+    chunk_pos := vec2_to_vec2i({pos.x / CHUNK_SIZE, pos.y / CHUNK_SIZE})
+    return chunk_pos
+}
+
+get_local_chunk_pos :: proc(pos:Vec2i) -> Vec2i {
+    return Vec2i {
+        (pos.x % CHUNK_SIZE + CHUNK_SIZE) % CHUNK_SIZE,
+        (pos.y % CHUNK_SIZE + CHUNK_SIZE) % CHUNK_SIZE,
+    }
+}
+
+get_world_tile :: proc(w:^World, pos:Vec2i) -> ^Tile {
+    chunk_pos := world_pos_to_chunk_pos(vec2i_to_vec2(pos))
+    local_pos := get_local_chunk_pos(pos)
+    
+    chunk := get_chunk(w, chunk_pos)
+
+    return get_chunk_tile(chunk, local_pos)
+}
+
+get_chunk_tile :: proc(c:^Chunk, pos:Vec2i) -> ^Tile {
+    return &c.tiles[pos.x][pos.y]
+}
+
+set_chunk_tile :: proc(c:^Chunk, t:Tile, pos:Vec2i) {
+    c.tiles[pos.x][pos.y] = t
 }
 
 draw_world :: proc(w:^World) {
-    for x in 0..< len(w.grid) {
-        for y in 0..< len(w.grid) {
-            tile := w.grid[x][y]
-            posX := x * TILE_SIZE
-            posY := y * TILE_SIZE
+    for chunk_pos, chunk in w.chunks {
+        for x in 0..<CHUNK_SIZE {
+            for y in 0..<CHUNK_SIZE {
+                tile := chunk.tiles[x][y]
+                world_x := chunk_pos.x * CHUNK_SIZE + x
+                world_y := chunk_pos.y * CHUNK_SIZE + y
+                pos := rl.Vector2{f32(world_x * CELL_SIZE), f32(world_y * CELL_SIZE)}
 
-            if tile.type != .NOTHING {
-                draw_tile(tile.tilemap_pos, {f32(posX), f32(posY)}, tile.color)
+                if tile.type != .NOTHING {
+                    draw_tile(vec2i_to_vec2(tile.tilemap_pos), pos, tile.color)
+                }
             }
         }
     }
 }
+
+
+// draw_world :: proc(w:^World) {
+//     for x in 0..< len(w.grid) {
+//         for y in 0..< len(w.grid) {
+//             tile := w.grid[x][y]
+//             posX := x * TILE_SIZE
+//             posY := y * TILE_SIZE
+
+//             if tile.type != .NOTHING {
+//                 draw_tile(tile.tilemap_pos, {f32(posX), f32(posY)}, tile.color)
+//             }
+//         }
+//     }
+// }