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

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
New
hgkjshegfskef
The test is as follows: Scenario: Intersecting a scaled sphere with a ray Given r ← ray(point(0, 0, -5), vector(0, 0, 1)) And s ← sphere...
New
brunogirin
When I run the coverage example to report on missing lines, I get: pytest --cov=cards --report=term-missing ch7 ERROR: usage: pytest [op...
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
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
gorkaio
root_layout: {PentoWeb.LayoutView, :root}, This results in the following following error: no “root” html template defined for PentoWeb...
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
Reading something? Working on something? Planning something? Changing jobs even!? If you’re up for sharing, please let us know what you’...
1063 24245 395
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
Stop developing web apps with yesterday’s tools. Today, developers are increasingly adopting Clojure as a web-development platform. See f...
New
New
PragmaticBookshelf
Free and open source software is the default choice for the technologies that run our world, and it’s built and maintained by people like...
New
PragmaticBookshelf
From finance to artificial intelligence, genetic algorithms are a powerful tool with a wide array of applications. But you don't need an ...
New
New
dimitarvp
Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...
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
New

Sub Categories: