Introduce depth buffer finally

src/Game.zig

@@ -441,6 +441,17 @@ pub fn init(allocator: std.mem.Allocator, engine: *Engine, swapchain: *Swapchain
             .alpha_to_coverage_enable = .false,
             .alpha_to_one_enable = .false,
         },
+        .depth_stencil_state = .{
+            .depth_test_enable = .true,
+            .depth_write_enable = .true,
+            .depth_compare_op = .greater,
+            .depth_bounds_test_enable = .false,
+            .stencil_test_enable = .false,
+            .front = undefined,
+            .back = undefined,
+            .min_depth_bounds = 0,
+            .max_depth_bounds = 1,
+        },
         .color_blend_state = .{
             .logic_op_enable = .false,
             .logic_op = .copy,
@@ -639,10 +650,10 @@ pub fn init(allocator: std.mem.Allocator, engine: *Engine, swapchain: *Swapchain
     });
 
     const object_count: u32 = blk: {
-        var objects: std.ArrayList(ObjectUniforms) = try .initCapacity(allocator, 289);
+        var objects: std.ArrayList(ObjectUniforms) = try .initCapacity(allocator, 578);
         defer objects.deinit(allocator);
 
-        var it = Iterator3.init(.init(-8, -8, 0), .init(8, 8, 0), .one);
+        var it = Iterator3.init(.init(-8, -8, 0), .init(8, 8, 2), .init(1, 1, 2));
         while (it.next()) |pos| {
             const material: Materials.Id = @enumFromInt(engine.random.uintLessThan(u16, @intFromEnum(materials.next_id)));
             const matrix_os_to_ws = Matrix4x4.initTranslation(pos);
@@ -750,9 +761,9 @@ pub fn update(self: *Game, dt: f32) void {
     // zig fmt: off
     const matrix_vs_to_cs = Matrix4x4.init(
         camera_xscale,  0,             0,                 0,
-        0,              0,             camera_near_plane, 1,
+        0,              0,             0,                 1,
         0,             -camera_yscale, 0,                 0,
-        0,              0,             0,                 0,
+        0,              0,             camera_near_plane, 0,
     );
     // zig fmt: on
 
@@ -863,7 +874,17 @@ fn render(self: *Game) !void {
     try command_buffer.beginCommandBuffer(&.{ .flags = .{ .one_time_submit_bit = true } });
     {
         const clear_values = [_]vk.ClearValue{
-            .{ .color = .{ .float_32 = .{ 0, 0, 0, 1 } } },
+            .{
+                .color = .{
+                    .float_32 = .{ 0, 0, 0, 0 },
+                },
+            },
+            .{
+                .depth_stencil = .{
+                    .depth = 0,
+                    .stencil = 0,
+                },
+            },
         };
 
         command_buffer.beginRenderPass(&.{