Add UI to tutorial

docs/src/SUMMARY.md

@@ -26,6 +26,7 @@
 - [Chapter 3: Scene](./tutorials/game/3_scene.md)
 - [Chapter 4: Player interaction](./tutorials/game/4_player_interaction.md)
 - [Chapter 5: Models](./tutorials/game/5_models.md)
+- [Chapter 6: UI](./tutorials/game/6_ui.md)
 
 # Reference Guide
 

docs/src/tutorials/game/4_player_interaction.md

@@ -50,3 +50,5 @@ Paint::subscribe(|_, msg| {
 
 Great, let's run it and you should now be able to "paint" by pressing `Q`:
 
+
+## [ ⇾ Chapter 5: Models](./5_models.md)

docs/src/tutorials/game/5_models.md

@@ -39,3 +39,5 @@ You should now see something like this:
 Great! We've learned how to load models into Ambient.
 
 > Tip: Use `prefab_from_url` instead of `model_from_url` if you also want to include a collider. [See the physics example.](https://github.com/AmbientRun/Ambient/tree/main/guest/rust/examples/basics/physics)
+
+## [ ⇾ Chapter 6: UI](./6_ui.md)

docs/src/tutorials/game/6_ui.md

@@ -0,0 +1,33 @@
+# Chapter 6: User interface (UI)
+
+Many games rely on showing some kind of UI on top of the 3d game, so let's try adding some basic UI to our game.
+
+## Showing the players position
+
+Add the following to `client.rs`:
+
+```rust
+#[element_component]
+fn PlayerPosition(hooks: &mut Hooks) -> Element {
+    let (pos, _) = use_entity_component(hooks, player::get_local(), translation());
+    Text::el(format!("Player position: {}", pos.unwrap_or_default()))
+}
+```
+
+> UI in Ambient is losely inspired by React. See [the UI docs for more info](../../reference/ui.md).
+
+> Tip: See [the UI examples](https://github.com/AmbientRun/Ambient/tree/main/guest/rust/examples/ui) to learn
+> how to use layout, buttons, editors and much more.
+
+And then add this to the `main` function in `client.rs`:
+
+```rust
+PlayerPosition.el().spawn_interactive();
+```
+
+You should now see something like this:
+
+![UI](ui.png)
+
+> Challenge: Try adding a `Button`, which when clicked sends a message to the server and moves the characters position somewhere else.
+