Uncomment door code

Still doesn't work because I decided to do doors differently. My next
step is to make the door entities add and remove tiles

assets/assets.zig

@@ -1,2 +1 @@
 pub usingnamespace @import("tiles.zig");
-pub usingnamespace @import("maps/map.zig");

src/circuit.zig

@@ -235,9 +235,12 @@ pub fn enabledBridges(this: @This(), alloc: std.mem.Allocator) !util.Buffer(usiz
 }
 
 pub fn enabledDoors(this: @This(), alloc: std.mem.Allocator) !util.Buffer(Cell) {
-    var items = try alloc.alloc(Cell, this.doors.len);
+    var items = try alloc.alloc(Cell, this.doors.items.len);
     var buffer = util.Buffer(Cell).init(items);
     for (this.doors.items) |d| {
+        const x = d.cell[0];
+        const y = d.cell[1];
+        w4.tracef("%d, %d", x, y);
         if (d.enabled) buffer.append(d.cell);
     }
     return buffer;

src/game.zig

@@ -617,10 +617,11 @@ fn updateCircuit() !void {
             (circuit.isEnabled(cellEnd) and end.pinned)) wire.enabled = true;
     }
     // map.reset(&assets.solid);
-    // const enabledDoors = try circuit.enabledDoors(frame_alloc);
-    // for (enabledDoors.items) |door| {
-    //     try map.set_cell(door, 0);
-    // }
+    const enabledDoors = try circuit.enabledDoors(frame_alloc);
+    defer frame_alloc.free(enabledDoors.items);
+    for (enabledDoors.items) |door| {
+        try map.set_cell(door, 0);
+    }
 }
 
 fn wirePhysicsProcess(dt: f32, wire: *Wire) !void {

src/main.zig

@@ -29,7 +29,7 @@ export fn update() void {
         .Menu => menu.update(),
         .Game => game.update(time) catch |e| switch (e) {
             error.Overflow => showErr(@errorName(e)),
-            // error.OutOfBounds => showErr(@errorName(e)),
+            error.OutOfBounds => showErr(@errorName(e)),
             // error.EndOfStream => showErr(@errorName(e)),
             error.OutOfMemory => showErr(@errorName(e)),
         },
@@ -40,7 +40,7 @@ export fn update() void {
             .Menu => menu.start(),
             .Game => game.start() catch |e| switch (e) {
                 error.Overflow => showErr(@errorName(e)),
-                // error.OutOfBounds => showErr(@errorName(e)),
+                error.OutOfBounds => showErr(@errorName(e)),
                 error.EndOfStream => showErr(@errorName(e)),
                 error.OutOfMemory => showErr(@errorName(e)),
                 error.NullTiles => showErr(@errorName(e)),

src/util.zig

@@ -107,24 +107,33 @@ test "Queue" {
 
 pub fn Buffer(comptime T: type) type {
     return struct {
-        len: usize,
+        len: usize = 0,
+        backing_buffer: []T,
         items: []T,
 
-        pub fn init(slice: []T) @This() {
-            return @This(){
-                .len = 0,
-                .items = slice,
+        pub fn init(backing_buffer: []T) @This() {
+            var this = @This(){
+                .items = backing_buffer,
+                .backing_buffer = backing_buffer,
             };
+            this.set_len(0);
+            return this;
+        }
+
+        fn set_len(this: *@This(), len: usize) void {
+            this.len = len;
+            this.items.len = len;
         }
 
         pub fn reset(buf: *@This()) void {
             buf.len = 0;
+            buf.items.len = 0;
         }
 
         pub fn append(buf: *@This(), item: T) void {
-            std.debug.assert(buf.len < buf.items.len);
-            buf.items[buf.len] = item;
-            buf.len += 1;
+            std.debug.assert(buf.len < buf.backing_buffer.len);
+            buf.backing_buffer[buf.len] = item;
+            buf.set_len(buf.len + 1);
         }
     };
 }