Make use of some globals to stop typing engine everywhere.

src/AppContext.zig

@@ -0,0 +1,20 @@
+const AppContext = @This();
+const std = @import("std");
+
+const glfw = @import("zglfw");
+
+const Atoms = @import("engine/Atoms.zig");
+const Engine = @import("engine/Engine.zig");
+const Swapchain = @import("engine/Swapchain.zig");
+const VkAllocator = @import("engine/VkAllocator.zig");
+
+pub var allocator_general: std.mem.Allocator = undefined;
+pub var allocator_frame: std.mem.Allocator = undefined;
+pub var allocator_persistent: std.mem.Allocator = undefined;
+pub var io: std.Io = undefined;
+pub var vk_allocator: *VkAllocator = undefined;
+
+pub var window: *glfw.Window = undefined;
+pub var atoms: *Atoms = undefined;
+pub var engine: *Engine = undefined;
+pub var swapchain: *Swapchain = undefined;