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

belgoros
Following the steps described in Chapter 6 of the book, I’m stuck with running the migration as described on page 84: bundle exec sequel...
New
jesse050717
Title: Web Development with Clojure, Third Edition, pg 116 Hi - I just started chapter 5 and I am stuck on page 116 while trying to star...
New
jskubick
I’m under the impression that when the reader gets to page 136 (“View Data with the Database Inspector”), the code SHOULD be able to buil...
New
nicoatridge
Hi, I have just acquired Michael Fazio’s “Kotlin and Android Development” to learn about game programming for Android. I have a game in p...
New
adamwoolhether
Is there any place where we can discuss the solutions to some of the exercises? I can figure most of them out, but am having trouble with...
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
rainforest
Hi, I’ve got a question about the implementation of PubSub when using a Phoenix.Socket.Transport behaviour rather than channels. Before ...
New
ggerico
I got this error when executing the plot files on macOS Ventura 13.0.1 with Python 3.10.8 and matplotlib 3.6.1: programming_ML/code/03_...
New
dachristenson
@mfazio23 Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...
New
New

Other popular topics Top

PragmaticBookshelf
Write Elixir tests that you can be proud of. Dive into Elixir’s test philosophy and gain mastery over the terminology and concepts that u...
New
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
DevotionGeo
I know that -t flag is used along with -i flag for getting an interactive shell. But I cannot digest what the man page for docker run com...
New
AstonJ
There’s a whole world of custom keycaps out there that I didn’t know existed! Check out all of our Keycaps threads here: https://forum....
New
Margaret
Hello everyone! This thread is to tell you about what authors from The Pragmatic Bookshelf are writing on Medium.
1147 29994 760
New
foxtrottwist
A few weeks ago I started using Warp a terminal written in rust. Though in it’s current state of development there are a few caveats (tab...
New
PragmaticBookshelf
Build efficient applications that exploit the unique benefits of a pure functional language, learning from an engineer who uses Haskell t...
New
PragmaticBookshelf
Author Spotlight: Peter Ullrich @PJUllrich Data is at the core of every business, but it is useless if nobody can access and analyze ...
New
New
CommunityNews
Open-source implementation of the classic GTA engine now running directly in your browser. Experience the reVC technology demo on DOS.Zon...
New

Sub Categories: