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

telemachus
Python Testing With Pytest - Chapter 2, warnings for “unregistered custom marks” While running the smoke tests in Chapter 2, I get these...
New
mikecargal
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...
New
herminiotorres
Hi @Margaret , On page VII the book tells us the example and snippets will be all using Elixir version 1.11 But on page 3 almost the en...
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
gilesdotcodes
In case this helps anyone, I’ve had issues setting up the rails source code. Here were the solutions: In Gemfile, change gem 'rails' t...
New
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
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
tkhobbes
After some hassle, I was able to finally run bin/setup, now I have started the rails server but I get this error message right when I vis...
New

Other popular topics Top

Devtalk
Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...
1050 21151 394
New
AstonJ
If it’s a mechanical keyboard, which switches do you have? Would you recommend it? Why? What will your next keyboard be? Pics always w...
New
PragmaticBookshelf
Learn from the award-winning programming series that inspired the Elixir language, and go on a step-by-step journey through the most impo...
New
AstonJ
poll poll Be sure to check out @Dusty’s article posted here: An Introduction to Alternative Keyboard Layouts It’s one of the best write-...
New
Exadra37
Oh just spent so much time on this to discover now that RancherOS is in end of life but Rancher is refusing to mark the Github repo as su...
New
PragmaticBookshelf
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
Help
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
New
New
PragmaticBookshelf
Get the comprehensive, insider information you need for Rails 8 with the new edition of this award-winning classic. Sam Ruby @rubys ...
New

Sub Categories: