What I did today

[Ali-RS]

Hi

Been playing around with new blocks I have recently added to my map editor using jMonkeyEngine and put together a block plotter script in groovy to speed up the process.

Some screenshots

in edit mode

and a toon style water

also wrote a block plotter script that I can feed it a 2D island texture (procedurally generated with mapgen2) and get a voxel map out.

Here is an early test! Borders are yet a bit buggy

Input texture

Output voxel map

Regards

[KaiHH]

Implemented Conway’s Game of Life with OpenGL compute shaders. This is the first naive version (with simple shader already using shared memory) but more is to come, like much bigger universe using OpenGL sparse textures.

LWJGL 3 OpenGL: Conway's Game of Life with Compute Shader

EDIT: Epic Game of Life Spaceships and Gosper Gun battle:

LWJGL 3 OpenGL: Conway's Game of Life Spaceships and Gosper Glider Gun Fight

[Apo]

Very first 3D attempt

[brotazoa]

Reminds me of the last supper and the board game clue.

[Ali-RS]

Practicing out my level design-fu as a programmer.
Some screenshots of my beautiful island…

[KaiHH]

Created a single-file/no-fuss/no-abstractions/direct Vulkan Ray Tracing demo (VK_KHR_ray_tracing_pipeline + VK_KHR_acceleration_structure) tracing a single triangle:

Java: https://github.com/LWJGL/lwjgl3-demos/blob/main/src/org/lwjgl/demo/vulkan/raytracing/SimpleTriangle.java
GLSL: https://github.com/LWJGL/lwjgl3-demos/tree/main/res/org/lwjgl/demo/vulkan/raytracing/simpletriangle

The goal was: Simplest possible setup and straight-forward code, following best-practices regarding LWJGL 3 Memory Management, without any abstractions in order to put the core Vulkan API calls in the focus.
Most other example code is scattered around dozens of classes, C++ template constructs and are therefore generally very hard to grasp because one is constantly following caller-callee in the IDE and fighting C++ language constructs.
This demo does not do that. It instead focuses on the pure Vulkan API calls that can be read from top-to-bottom through, with a bit of comments sprinkled in.

EDIT: New demo with recursive ray tracing for reflective windows (well… not “recursive” in the sense of calling shaders recursively (that is actually discouraged), but simply iteratively)

[Album] Vulkan Ray Tracing MagicaVoxel scene

Java: https://github.com/LWJGL/lwjgl3-demos/blob/main/src/org/lwjgl/demo/vulkan/raytracing/ReflectiveMagicaVoxel.java
GLSL: https://github.com/LWJGL/lwjgl3-demos/tree/main/res/org/lwjgl/demo/vulkan/raytracing/reflectivemagicavoxel

[Apo]

Because it was hard to control 3 chefs at the same time, I thought what can I do … and my kitchen game becomes now a programming game like HumaneResourceMachine. The “GUI Bot” can do the same tasks as the Java API Bot and it works. I am very happy with the result.

[philfrei]

I just put up a “beta test” of my first Spring project that is not just someone’s tutorial.

It’s kind of like a game. “Test yourself” is a common game theme, yes? You can use this site to test your ability to judge some simple musical intervals. It’s not installed as a service yet, so the URL/site will come and go. I’ll edit this post when I change the URL to something more definite or permanent.

IntervalWidthTest
Down for now. Will edit when I’m live again.

At this point was just trying to get a proof-of-concept working. This is written using Spring Boot. Java is used to generate the audio PCM data on the fly, based on the question parameters, and the audio data is shipped to the browser using Thymeleaf inlining to the Javascript, where it is stored in a Web Audio API AudioBuffer.

Some of the tests get rather difficult. The Fifths are harder than Octaves or Unisons. Pure tones are harder than richer tones. Descending may be harder than ascending. It helps to know something about the musical intervals involved. I may have made some of the “easy” interval tests so wide that they get confused with an adjacent interval. Further development will be needed, for sure.

[princec]

Connection refused atm.

[philfrei]

I had it up until around 3AM last night (Pacific Time). Was up late due to binging “Shadow & Bone”. When I took a look at the console there was a message I didn’t understand that I think must have been a hacking attempt. It certainly wasn’t from the System.out.println’s. (I should have taken a screen shot before closing down. Dang.) I’m not totally up on security issues, and the next section in a tutorial I’m reading is on security basics for Spring. IDK if it will answer the questions I have, but I thought I’d give it a read before launching again.

I opened port 8081 to run this. I’m unclear if the security measures I’ve put in place for this virtual server (Ubuntu Linode) are enough to prevent hacking. If security on 8081 is “the same” as for 80, is opening 8081 a concern?

For example, SSH requires RSA. Logins via password are not permitted. Login as root is not permitted. And the spring code I exposed has no place where a user can send in executable text, afaik. The only queries executed are the result of logic based on evaluating inputs. I am pretty sure SQL injection or other forms of injection are not possible here.

I took two courses, one on web security & another on network security and can’t confidently answer this question. Courses alone are dubious–one really need to get hands on experience, I think.

[Herjan]

I finished today:

Eyes hurt raytracer

It’s really much easier after a few math courses.

[koin3d]

Made a java port of vk-bootstrap
https://github.com/YvesBoyadjian/vk-bootstrap4j

[Herjan]

Today I read a news announcement from Rayvolution (creator of steam game Retro pixel castles on this forum). Such honesty and motivation… the ones failing are losers for life and the ones winning are heroes, the heavens want him to succeed: https://store.steampowered.com/news/app/328080?emclan=103582791436524758&emgid=5127884013766587984

I guess he can’t distinguish virtuality from reality and plays life like a game!

[koin3d]

Today I implemented the Vulkan Guide chapter 5 example in java in the vk-boostrap4j project:
https://github.com/YvesBoyadjian/vk-bootstrap4j/tree/master/vk-bootstrap/src/vulkanguide

[gouessej]

@philfrei

If security on 8081 is “the same” as for 80, is opening 8081 a concern?

80 is a privileged port whereas 8081 isn’t. Personally, my server doesn’t run as root so that a hacker exploiting a flaw in it wouldn’t get root privileges without an elevation:
https://sourceforge.net/p/red-feed-aggregator/code/ci/master/tree/minimal_self_hosting_setup.sh#l294

[philfrei]

Thx @gouessej. I’m not running as root either. I think my worries were more due to this being new to me.

[SHC]

After a long time, I’ve removed the backups of old JGO that I had from my site today. I just deactivated the server hosting them in case Riven or any moderator is interested in them for archiving purposes. If no one claims, I’ll be removing them entirely in the new year.

Btw, due to holidays, I won’t be active here for a few days. So if needed, you can email me at hello@goharsha.com

[SHC]

As I already said, I have removed them today.

I wish you all a very happy and prosperous new year 2022!