Blocks and chunks

src/assets/Materials.zig

@@ -19,6 +19,7 @@ pub const capacity = std.math.maxInt(std.meta.Tag(Id));
 
 pub const Key = struct { atom: atoms.Atom };
 pub const Id = enum(u16) {
+    empty,
     _,
 
     pub fn next(self: Id) Id {
@@ -55,10 +56,12 @@ pub fn init(engine: *Engine, allocator: std.mem.Allocator) !Materials {
     });
     errdefer material_buffer.deinit(engine);
 
+    // TODO Add "error" material to represent the empty value (it shouldn't be rendered, so it's good to know when it is).
+
     return .{
         .map = map,
         .material_buffer = material_buffer,
-        .next_id = @enumFromInt(0),
+        .next_id = @enumFromInt(1),
     };
 }