mikecargal

mikecargal

Hands-On Rust: Wrong multiplier for 8x8 console in main.rs

Title: Hands-On Rust (Chap 8 (Adding a Heads Up Display)

It looks like

    ​.with_simple_console_no_bg​(SCREEN_WIDTH*2, SCREEN_HEIGHT*2,
​	        ​"terminal8x8.png"​)”

should be:

    ​.with_simple_console_no_bg​(SCREEN_WIDTH*4, SCREEN_HEIGHT*4,
​	        ​"terminal8x8.png"​)”

I had thought that my HUD seemed a bit bigger than the screen shots, but it really showed up when I added the tooltips and they were way off (being multiplied by 4)

Also… :slight_smile: another Mac/Big Sur terminal rendering artifact:

It looks like the top row (or 2??) of pixels are being occluded.

Most Liked

herbert

herbert

Author of Hands-on Rust

Not embarrassing - happens to all of us. I once replaced every news article on a production server with the word “quilting” because of an SQL typo…

I think you’re right about renaming the constants and making the multiply/scaling more obvious. I’ll see if I can clean that up for the next beta. Thanks!

That’s a good point about magic numbers. You could include

const MAP_LAYER : usize = 0;`
const DISPLAY_LAYER : usize = 1;`
const HUD_LAYER : usize = 2;

in your prelude, and use those. That would definitely be easier to read - I’ll see if putting that in won’t blow up my page count too badly (the eternal author struggle: fitting everything into a size the publisher wants to print!)

mikecargal

mikecargal

This is embarrassing…

I used DISPLAY_* (instead of SCREEN_) when I set up the simple_console (since the others used DISPLAY_. It appears that, when reporting my “issue” I copied/pasted from the book, instead of my code.

In whatever of my defense I might mount, I think that DISPLAY_WIDTH4 and DISPLAY_HEIGHT4 make a bit more sense, because you’re using DISPLAY* constants on the other consoles and 32/8 = 4. SCREEN_* works (with 2) because there’s already a divide my 2.). And… and… the HUD is more of a DISPLAY thing played over the window into the full screen (THat’s my defense, and I’m sticking to it :wink: )

Of course, all said, your code is correct, and my “issue” was my typo. Deeply sorry about wasting your time.

Arbitrary code critique… I’m at the point now that I bring when I see “magic numbers” in code. (examples are the layer console IDs, the z_order, etc. I’ve been playing a bit with trying to find good ways toggle them names in my version)

herbert

herbert

Author of Hands-on Rust

Thanks again! There’s a Big Sur update in the works for bracket-lib. I’m waiting on a couple of M1 chip fixes to come downstream, but the warnings are fixed. Adding a gutter is in-progress, requires a surprising amount of testing.

I’ll check the multiplier. I’ve added the issue to the tracker, and it should be in beta 3.

Where Next?

Popular Pragmatic Bookshelf topics Top

New
lirux
Hi Jamis, I think there’s an issue with a test on chapter 6. I own the ebook, version P1.0 Feb. 2019. This test doesn’t pass for me: ...
New
mikecargal
Title: Hands-on Rust: question about get_component (page 295) (feel free to respond. “You dug you’re own hole… good luck”) I have somet...
New
JohnS
I can’t setup the Rails source code. This happens in a working directory containing multiple (postgres) Rails apps. With: ruby-3.0.0 s...
New
leba0495
Hello! Thanks for the great book. I was attempting the Trie (chap 17) exercises and for number 4 the solution provided for the autocorre...
New
jskubick
I’m running Android Studio “Arctic Fox” 2020.3.1 Patch 2, and I’m embarrassed to admit that I only made it to page 8 before running into ...
New
jskubick
I think I might have found a problem involving SwitchCompat, thumbTint, and trackTint. As entered, the SwitchCompat changes color to hol...
New
adamwoolhether
I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m im...
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
dachristenson
I just bought this book to learn about Android development, and I’m already running into a major issue in Ch. 1, p. 20: “Update activity...
New

Other popular topics Top

Devtalk
Hello Devtalk World! Please let us know a little about who you are and where you’re from :nerd_face:
New
PragmaticBookshelf
Ruby, Io, Prolog, Scala, Erlang, Clojure, Haskell. With Seven Languages in Seven Weeks, by Bruce A. Tate, you’ll go beyond the syntax—and...
New
Exadra37
I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...
New
PragmaticBookshelf
Learn different ways of writing concurrent code in Elixir and increase your application's performance, without sacrificing scalability or...
New
Maartz
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
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
PragmaticBookshelf
A masterclass in the fundamentals and principles of functional programming. Minh Quang Tran The Art of Functional Programming is a ma...
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
PragmaticBookshelf
A concise guide to MySQL 9 database administration, covering fundamental concepts, techniques, and best practices. Neil Smyth MySQL...
New
xiji2646-netizen
Woke up to this today: Claude Code’s complete source code exposed via npm source map. Not a snippet. All 512,000 lines. 1,900 TypeScript ...
New

Sub Categories: