tabvaranjr

tabvaranjr

Hands-on Rust: Rendering issues with entities

Hi there! I’ve finished the book last Friday. Good work! It’s a very good introduction to Rust and I really enjoyed it.

I have noticed that some entities are rendering incorrectly. Take a good look at the sprites at page 254 and compare them with the sprites at pages 98 and 99 (beta 5 of the book). For instance, the potion lacks liquid and the scroll lacks its ribbon. I can reproduce this issue in Fedora Linux and Windows 10.

I’m pretty new to Rust but I’m quite experienced with OpenGL so I took a look at your shaders.

Here’s a magnified frame where you can clearly see the issue. You can also notice that orcs are missing their legs and their shadows.

Here’s the fragment shader used to render the tiles of the BTermBuilder::with_simple_console_no_bg() console:

The selected line is the interesting part.

Here’s a sample of the sprite texture:

I’ve sampled a texel of the potion at the right (see “Pixel Context”; the texel is the one within the square) and its RGBA value is in the red box, below the player and the letter A (pardon my lack of skills with GIMP). As you can see in the blue box, the G value is lower than 0.1, so the fragment shader discards the whole fragment. Here’s our problem.

Simply removing the selected line in the fragment shader fixes the issue. Yay!

However, you also have to adjust the terminal8x8.png font map and set the alpha of the black pixels to 0. Otherwise, you’ll get a black screen. I’ve uploaded my modified map in my repo.

Now, I can send you a PR for bracket-terminal but I’m not quite sure of the side effects for other programs than the ones in the book. I mean, this line was probably there for a reason.

Cheers!

Where Next?

Popular Pragmatic Bookshelf topics Top

jimschubert
In Chapter 3, the source for index introduces Config on page 31, followed by more code including tests; Config isn’t introduced until pag...
New
GilWright
Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...
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
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
raul
Page 28: It implements io.ReaderAt on the store type. Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt? ...
New
AleksandrKudashkin
On the page xv there is an instruction to run bin/setup from the main folder. I downloaded the source code today (12/03/21) and can’t see...
New
brian-m-ops
#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
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
Hi, I am getting an error I cannot figure out on my test. I have what I think is the exact code from the book, other than I changed “us...
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

dasdom
No chair. I have a standing desk. This post was split into a dedicated thread from our thread about chairs :slight_smile:
New
New
Rainer
My first contact with Erlang was about 2 years ago when I used RabbitMQ, which is written in Erlang, for my job. This made me curious and...
New
AstonJ
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...
New
mafinar
This is going to be a long an frequently posted thread. While talking to a friend of mine who has taken data structure and algorithm cou...
New
New
PragmaticBookshelf
Author Spotlight Jamis Buck @jamis This month, we have the pleasure of spotlighting author Jamis Buck, who has written Mazes for Prog...
New
husaindevelop
Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...
New
New
AstonJ
If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...
New

Sub Categories: