render: add depth buffer

src/game/main_scene.rs

@@ -9,6 +9,12 @@ use egui_winit_vulkano::{Gui, egui};
 use glam::EulerRot;
 use glam::Quat;
 use glam::Vec3;
+use vulkano::format::Format;
+use vulkano::image::Image;
+use vulkano::image::ImageCreateInfo;
+use vulkano::image::ImageLayout;
+use vulkano::image::ImageUsage;
+use vulkano::memory::allocator::AllocationCreateInfo;
 use vulkano::{
     command_buffer::{
         AutoCommandBufferBuilder, CommandBufferUsage, PrimaryCommandBufferAbstract,
@@ -28,6 +34,7 @@ pub struct MainSceneState {
     camera: Camera3D,
     texture: Texture,
     speed: f32,
+    depth_image_view: Arc<ImageView>,
 }
 
 #[derive(Default)]
@@ -41,10 +48,27 @@ impl Scene for MainScene {
     }
 
     fn load(&mut self, scene_context: &SceneContext) -> Result<(), Box<dyn Error>> {
+        let depth_image = Image::new(
+            scene_context.memory_allocator.clone(),
+            ImageCreateInfo {
+                format: Format::D16_UNORM,
+                extent: [
+                    scene_context.window_size[0] as u32,
+                    scene_context.window_size[1] as u32,
+                    1,
+                ],
+                usage: ImageUsage::DEPTH_STENCIL_ATTACHMENT,
+                ..Default::default()
+            },
+            AllocationCreateInfo::default(),
+        )?;
+        let depth_image_view = ImageView::new_default(depth_image)?;
+
         let square = Square::new(
             &scene_context.device,
             &scene_context.memory_allocator,
             scene_context.swapchain_format,
+            Format::D16_UNORM,
         )?;
 
         let num_instances = 100;
@@ -98,6 +122,7 @@ impl Scene for MainScene {
             camera,
             texture,
             speed: 50.0,
+            depth_image_view,
         });
 
         Ok(())
@@ -146,6 +171,12 @@ impl Scene for MainScene {
                         clear_value: Some([0.0, 0.0, 0.0, 1.0].into()),
                         ..RenderingAttachmentInfo::image_view(image_view.clone())
                     })],
+                    depth_attachment: Some(RenderingAttachmentInfo {
+                        load_op: AttachmentLoadOp::Clear,
+                        store_op: AttachmentStoreOp::DontCare,
+                        clear_value: Some([1.0].into()),
+                        ..RenderingAttachmentInfo::image_view(state.depth_image_view.clone())
+                    }),
                     ..Default::default()
                 })?
                 .set_viewport(0, [viewport].into_iter().collect())?;