Small corrections from writing the solution

handouts/src/24-resourceful.md

@@ -375,7 +375,7 @@ pub fn create_parameters(
 
 ## Concentration images
 
-### Setting the stage
+### Did you say images?
 
 As previously mentioned, Vulkan images give us access to the power of GPU
 texturing units, which were designed to speed up and simplify the chore of
@@ -684,32 +684,33 @@ use vulkano::{
     Validated, VulkanError,
 };
 
-|[in_u, in_v, out_u, out_v]: [Arc<Image>; 4]| -> Result<_, Validated<VulkanError>> {
-    let layout = pipeline.layout().set_layouts()[IMAGES_SET as usize].clone();
-    let binding =
-        |binding, image: Arc<Image>, usage| -> Result<_, Validated<VulkanError>> {
-            let view_info = ImageViewCreateInfo {
-                usage,
-                ..ImageViewCreateInfo::from_image(&image)
+let create_set =
+    |[in_u, in_v, out_u, out_v]: [Arc<Image>; 4]| -> Result<_, Validated<VulkanError>> {
+        let layout = pipeline.layout().set_layouts()[IMAGES_SET as usize].clone();
+        let binding =
+            |binding, image: Arc<Image>, usage| -> Result<_, Validated<VulkanError>> {
+                let view_info = ImageViewCreateInfo {
+                    usage,
+                    ..ImageViewCreateInfo::from_image(&image)
+                };
+                Ok(WriteDescriptorSet::image_view(
+                    binding,
+                    ImageView::new(image, view_info)?,
+                ))
             };
-            Ok(WriteDescriptorSet::image_view(
-                binding,
-                ImageView::new(image, view_info)?,
-            ))
-        };
-    let descriptor_set = PersistentDescriptorSet::new(
-        &context.descriptor_alloc,
-        layout,
-        [
-            binding(IN_U, in_u, ImageUsage::SAMPLED)?,
-            binding(IN_V, in_v, ImageUsage::SAMPLED)?,
-            binding(OUT_U, out_u, ImageUsage::STORAGE)?,
-            binding(OUT_V, out_v, ImageUsage::STORAGE)?,
-        ],
-        [],
-    )?;
-    Ok(descriptor_set)
-};
+        let descriptor_set = PersistentDescriptorSet::new(
+            &context.descriptor_alloc,
+            layout,
+            [
+                binding(IN_U, in_u, ImageUsage::SAMPLED)?,
+                binding(IN_V, in_v, ImageUsage::SAMPLED)?,
+                binding(OUT_U, out_u, ImageUsage::STORAGE)?,
+                binding(OUT_V, out_v, ImageUsage::STORAGE)?,
+            ],
+            [],
+        )?;
+        Ok(descriptor_set)
+    };
 ```
 
 ...and then we will use it to build our double-buffered descriptor set
@@ -721,11 +722,11 @@ fn create_concentration_sets(
     pipeline: &ComputePipeline,
     images: &[Arc<Image>],
 ) -> Result<[Arc<PersistentDescriptorSet>; 2], Validated<VulkanError>> {
-    let new_images_set = /* ... as above ... */;
+    let create_set = /* ... as above ... */;
     let [u1, v1, u2, v2] = [&images[0], &images[1], &images[2], &images[3]];
     let descriptor_sets = [
-        new_images_set([u1.clone(), v1.clone(), u2.clone(), v2.clone()])?,
-        new_images_set([u2.clone(), v2.clone(), u1.clone(), v1.clone()])?,
+        create_set([u1.clone(), v1.clone(), u2.clone(), v2.clone()])?,
+        create_set([u2.clone(), v2.clone(), u1.clone(), v1.clone()])?,
     ];
     Ok(descriptor_sets)
 }