pudgyturtle

pudgyturtle

Hands-on Rust dungeon crawler bug I can't figure out (Amulet of Yala)

@herbert

Hoping someone can point me in the right direction here: I’m working through the book Hands-On Rust and have just written the code required to spawn the Amulet of Yala in the map at the most accessibly distant tile from where the player spawns. It’s supposed to be added in the corner of some random faraway room, like this:

That image is from the book on pg 180. My code, however, has the amulet spawning not in a room but in one of the four corners of the entire map screen. i.e. completely unreachable:

I combed through every line of code and compared it to what’s in the author’s official repo (HandsOnRust/WinningAndLosing/winning at main · thebracket/HandsOnRust · GitHub) but can’t see what my mistake is. I finally just copied the code from all the files I touched for this Amulet of Yala task to ensure it’s identical, but the amulet is still spawning in a screen corner out of reach. The only files I edited for this are winning/src/components.rs winning/src/spawner.rs winning/src/map_builder.rs winning/src/main.rs winning/src/turn_state.rs and 'winning/src/end_turn.rs. I’m pretty sure the error involves map_builder.rs because it’s the Dijkstra map code that is determining the distance/placement of the amulet in relation to the player:

Anyway, I created a Github repository of all my code in case someone is willing, able, and kind enough to have a look. GitHub - pudgyturtle/dungeoncrawl I’m reluctant to suggest it’s a bug or error with the book because so far every error I’ve had has been my own typo or oversight, but this one has me super stumped. I’d appreciate any suggestions or help!

First Post!

malachid

malachid

@herbert

I’ll start by saying that I compared your code to my older commit and I didn’t see anything wrong with your code. I verified that mine was working and yours wasn’t. I did some debugging and found that yours is always positioned in one of the 4 corners. Specifically in:
idx [ dist ] point
0 [62]: Point { x: 0, y: 0 }
79 [97]: Point { x: 79, y: 0 }
3920 [31]: Point { x: 0, y: 49 }
3999 [66]: Point { x: 79, y: 49 }

I also verified that all 4 corners are always walls, as they should be since all four edges are walls.

As a test, I added this to the mb.amulet_start function:

                .filter(|(idx, dist)| {
                    match mb.map.tiles[*idx] {
                        TileType::Floor => {
                            true
                        },
                        TileType::Wall => {
                            false
                        },
                    }
                })

This resulted in the amulet being reachable.

That being said, I don’t have that code snippet in mine - but maybe that will help you track it down.

Where Next?

Popular Pragmatic Bookshelf topics Top

simonpeter
When I try the command to create a pair of migration files I get an error. user=> (create-migration "guestbook") Execution error (Ill...
New
alanq
This isn’t directly about the book contents so maybe not the right forum…but in some of the code apps (e.g. turbo/06) it sends a TURBO_ST...
New
jgchristopher
“The ProductLive.Index template calls a helper function, live_component/3, that in turn calls on the modal component. ” Excerpt From: Br...
New
jskubick
I found an issue in Chapter 7 regarding android:backgroundTint vs app:backgroundTint. How to replicate: load chapter-7 from zipfile i...
New
dsmith42
Hey there, I’m enjoying this book and have learned a few things alredayd. However, in Chapter 4 I believe we are meant to see the “>...
New
taguniversalmachine
It seems the second code snippet is missing the code to set the current_user: current_user: Accounts.get_user_by_session_token(session["...
New
s2k
Hi all, currently I wonder how the Tailwind colours work (or don’t work). For example, in app/views/layouts/application.html.erb I have...
New
jwandekoken
Book: Programming Phoenix LiveView, page 142 (157/378), file lib/pento_web/live/product_live/form_component.ex, in the function below: d...
New
redconfetti
Docker-Machine became part of the Docker Toolbox, which was deprecated in 2020, long after Docker Desktop supported Docker Engine nativel...
New
dachristenson
I’ve got to the end of Ch. 11, and the app runs, with all tabs displaying what they should – at first. After switching around between St...
New

Other popular topics Top

DevotionGeo
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
New
New
PragmaticBookshelf
Leverage Elixir and the Nx ecosystem to build intelligent applications that solve real-world problems in computer vision, natural languag...
New
PragmaticBookshelf
25 puzzles that will make you a better C programmer by challenging your knowledge of the language, and explaining the technical details o...
New
First poster: AstonJ
Jan | Rethink the Computer. Jan turns your computer into an AI machine by running LLMs locally on your computer. It’s a privacy-focus, l...
New
sir.laksmana_wenk
I’m able to do the “artistic” part of game-development; character designing/modeling, music, environment modeling, etc. However, I don’t...
New
RobertRichards
Hair Salon Games for Girls Fun Girls Hair Saloon game is mainly developed for kids. This game allows users to select virtual avatars to ...
New
Fl4m3Ph03n1x
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
New
PragmaticBookshelf
Use advanced functional programming principles, practical Domain-Driven Design techniques, and production-ready Elixir code to build scal...
New
xiji2646-netizen
There’s a GitHub repo at forrestchang/andrej-karpathy-skills that’s sitting at 97.8k stars. It’s a single CLAUDE.md file with four behavi...
New

Sub Categories: