got it working again. Finally clicked with me what was going on with the functions & how to specify their generic types

src/vkprocessor.rs

@@ -320,7 +320,7 @@ impl<'a> VkProcessor<'a> {
             // We need to indicate the layout of the vertices.
             // The type `SingleBufferDefinition` actually contains a template parameter corresponding
             // to the type of each vertex. But in this code it is automatically inferred.
-//            .vertex_input_single_buffer()
+            .vertex_input_single_buffer::<tVertex>()
             // A Vulkan shader can in theory contain multiple entry points, so we have to specify
             // which one. The `main` word of `main_entry_point` actually corresponds to the name of
             // the entry point.
@@ -445,9 +445,9 @@ impl<'a> VkProcessor<'a> {
                     AutoCommandBufferBuilder::primary_one_time_submit(self.device.clone(), self.queue.family())
                         .unwrap()
 
-//                        .dispatch([self.xy.0, self.xy.1, 1],
+                        .dispatch([self.xy.0, self.xy.1, 1],
-//                                  self.compute_pipeline.clone(),
+                                  self.compute_pipeline.clone().unwrap().clone(),
-//                                  self.set.clone(), ()).unwrap()
+                                  self.set.clone().unwrap().clone(), ()).unwrap()
                         // Before we can draw, we have to *enter a render pass*. There are two methods to do
                         // this: `draw_inline` and `draw_secondary`. The latter is a bit more advanced and is
                         // not covered here.
@@ -501,13 +501,6 @@ impl<'a> VkProcessor<'a> {
                     }
                 }
             }
-            // Note that in more complex programs it is likely that one of `acquire_next_image`,
-            // `command_buffer::submit`, or `present` will block for some time. This happens when the
-            // GPU's queue is full and the driver has to wait until the GPU finished some work.
-            //
-            // Unfortunately the Vulkan API doesn't provide any way to not wait or to detect when a
-            // wait would happen. Blocking may be the desired behavior, but if you don't want to
-            // block you should spawn a separate thread dedicated to submissions.
 
             // Handling the window events in order to close the program when the user wants to close
             // it.