Hello, I found your open source project some time ago, and I tried to make it run on Android.

Android project jump link

The compilation software I use is AIDE.

Because the version you use box2d uses more Java8 syntax and the version I use is Java7, I only tried to run the previous version, and the performance is a bit bad when the game is running.

Would you try to make an Android version?

Hello, when I zoomed the camera in the game to be smaller, I stumbled upon a bug.

The green area on this picture is the matrix by fallingsand simulation. (I changed the color of emptycell to this color.)

Then these are abnormal pictures:

When generating new element pixels, this problem appeared on the right side of the original green matrix. I haven't found the root cause of the problem, so I submit this question in the hope that you can solve it.

(Maybe my English is a bit strange, because I am not very good at English. If there is any language inappropriate, I hope you can forgive me)

https://youtu.be/5Ka3tbbT-9E?t=14

How did you implement the movement of the particle system. In particular how does the pixels travel in a projectile trajectory when a force is applied? is it implemented with rules based like the pixel simulation or is it something different? Great video otherwise.

Hello, I found that your program does not run very smoothly on Android, so I have a few suggestions here, which may be able to help you.

1.Emptycell may not be drawn.

2.Use multiple threads to calculate parameters and draw.

Waiting for completion...

Hy,
I followed your video on youtube to this repo.
I really wat to learn this stuff, so I tried to make my hands dirty. However, Im not a Java developer, and do not know a single thing about Gradle and all the odher stuff. However, Pulled the projekt from your repo, but it failed to build. There were two major problem:

1. Gradle is looking for and outdated version, as such gradle fails to build:
   GradleBuildLog.txt
2. When the main window is tarted (dektop build) it flashes and moves away, and complains that it can not find the UI asset (uiskin.atlas).
   BuildLog.txt

System specs:

1. Windows 10
2. VSCode 1.87.2
3. ExtensionPack for Java 0.25.15
4. Java 21.0.2
5. Gradle for Java 3.15.5
6. Language Support for Java(TM) by Red Hat 1.28.1

I would be very thankful if you could fix these, or at least give me a guide on how to make it build and run, at least on the desktop!

Thank you!

Very nice work, David. You mentioned online multiplayer in description. Do you think it's possible to add online multiplayer in games like Noita? I play this game a lot, and i think online co-op in the game will be cool.

Hi, inspired by your video as well as Noita and other projects, I have been working on my own falling sand engine in C# for a few months. I've got Box2D full integrated, but I've run into the "holes" issue you described here, but I'm struggling with a different problem than you were.

See this video: https://streamable.com/jeyklj

The order of operations I am performing is...

1. Place the pixels from all Box2D components into the main pixel matrix
2. Run the pixel matrix simulation
3. Remove all Box2D component pixels from the main pixel matrix and put them back into their respective components

Rather than just ending up with holes when the objects are rotated, it's like the holes appear and then continue to appear as it rotates further, leading to the pixels in the Box2D components just being erased entirely.

I know this repo hasn't been updated in a couple of years, I'm really just hoping you see this and are able to offer some insight, as I've been dealing with this problem for a few weeks now and I'm getting desperate!

Thanks!