Add zmath dependency

README.md

@@ -1,7 +1,19 @@
 # Zig Bloxel Game
 
-This is a small project attempting to create a "bloxel" game (think Minecraft) using the relatively new [Zig] programming language with the help of [Mach] and [Flecs].
+This is a small project attempting to create a "bloxel" game (think Minecraft) using the relatively new [Zig] programming language with the help of [Mach], [Flecs] and [zig-gamedev]. Due to Zig being a quickly evolving language, Mach and zig-gamedev, and as a result this project, target version `0.12.0-dev.2063+804cee3b9` of Zig.
 
 [Zig]:         https://ziglang.org/
-[Mach]:  https://machengine.org/
-[Flecs]: https://flecs.dev/
+[Mach]:        https://github.com/hexops/mach-core
+[Flecs]:       https://github.com/SanderMertens/flecs
+[zig-gamedev]: https://github.com/zig-gamedev/zig-gamedev
+
+## Dependencies
+
+```sh
+mkdir -p libs && cd libs
+# Clone zig-gamedev sparsely, only grabbing top-level files.
+git clone --sparse --filter=blob:none https://github.com/zig-gamedev/zig-gamedev.git
+# However, we also care about zmath, so check that out too.
+cd zig-gamedev
+git sparse-checkout add libs/zmath
+```

build.zig

@@ -1,10 +1,15 @@
 const std = @import("std");
 const mach_core = @import("mach_core");
+const zmath = @import("zmath");
 
 pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
+    const zmath_pkg = zmath.package(b, target, optimize, .{
+        .options = .{ .enable_cross_platform_determinism = true },
+    });
+
     const mach_core_dep = b.dependency("mach_core", .{
         .target = target,
         .optimize = optimize,
@@ -14,7 +19,9 @@ pub fn build(b: *std.Build) !void {
         .src = "src/main.zig",
         .target = target,
         .optimize = optimize,
-        .deps = &.{},
+        .deps = &.{
+            .{ .name = "zmath", .module = zmath_pkg.zmath },
+        },
     });
     if (b.args) |args| app.run.addArgs(args);
 
@@ -26,6 +33,7 @@ pub fn build(b: *std.Build) !void {
         .target = target,
         .optimize = optimize,
     });
+    unit_tests.root_module.addImport("zmath", zmath_pkg.zmath);
 
     const run_unit_tests = b.addRunArtifact(unit_tests);
     const test_step = b.step("test", "Run unit tests");

build.zig.zon

@@ -14,5 +14,6 @@
             .url = "https://pkg.machengine.org/mach-core/6a62bcc90e0d072d632788a6575d77942bd09a19.tar.gz",
             .hash = "12209d39954fcda0be158461c10f64d14d5c7d097bd6d26785b332d75ffefa7dd7a0",
         },
+        .zmath = .{ .path = "libs/zig-gamedev/libs/zmath" },
     },
 }

libs/zig-gamedev

@@ -0,0 +1 @@
+Subproject commit 25e1794d608d6a1d13e84a42d98c950fd250050d