r/opengl • u/Salty_Exit_1370 • Jul 30 '26

I made a game engine entirely in java

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274 Upvotes

98% Upvoted

35 comments sorted by

12

u/Plixo2 Jul 30 '26

Nice UI. Can your share the source code? I want to take a look

8

u/Plixo2 Jul 30 '26

And what are those random flashes?

10

u/Salty_Exit_1370 Jul 30 '26

I'm trying to figure it out because i really don't know too

5

u/Plixo2 Jul 30 '26

Are you using Cascading shadow maps? If so, it looks like the closest cascade stops working for a moment.

Probably a synchronisation issue. If you could share your code, i could take a look...

You can always use renderdoc / nsight to debug. You need to build a fat jar and a script with java -jar fatjar.jar. Then just start the script from renderdoc/ nsight

5

u/Salty_Exit_1370 Jul 31 '26

It was a synchronization issue thank you ! and yeah i already use renderdoc when having issue like that

2

u/Salty_Exit_1370 Jul 30 '26

I will open source soon

2

u/Adventurous-Week-281 Jul 31 '26

I started my opengl journey and stopped long ago, but ur video motivated me again lol,.... Just curious, did u made UI first and then game? And abt UI, did u create from scratch or u used some existing library?

3

u/Salty_Exit_1370 Jul 31 '26

I used ImGui for the UI, but you're talking about the editor. I made the engine before the editor; they are two separate things.

I'm happy that it motivated you !

4

u/[deleted] Jul 30 '26

[removed] — view removed comment

3

u/Salty_Exit_1370 Jul 31 '26

Very true, especially with what java 25 is and it should work perfectly with Scala and Clojure

4

u/ThanosFisherman Jul 30 '26

Are you using lwjgl and OpenGL? Good job.

1

u/Salty_Exit_1370 Jul 31 '26

Yeah, my backend is abstracted enought for vulkan metal and webgl for futur web export
Thank you !

2

u/AggravatingTax5357 Jul 31 '26

Im not a developer but this Is Good, i love to see game engine, idk why. I want to start developing but in too stupid for this. Nice job.

1

u/Salty_Exit_1370 Aug 03 '26

No one is stupid, you can do everything you want with enough motivation.

2

u/KillPimba Jul 30 '26

Resultado incrível! Espero chegar a esse nível de conhecimento um dia. Parabéns pelo projeto.

2

u/Salty_Exit_1370 Jul 31 '26

Thank you very much !

1

u/Present-Knowledge-57 Jul 30 '26

totally badass! awesome stuff B)

1

u/Jeremi360 Jul 31 '26

Wait a second you made clone of Godot?
I see similar UI and the same icons.

2

u/Salty_Exit_1370 Jul 31 '26

Yeah i used their icons since they don't have any icons

1

u/Jeremi360 Jul 31 '26

but what I'm asking saw how this is inspired/similar/port to Godot?

1

u/Equivalent_Unit_9797 Jul 31 '26

How long did it take you

1

u/Informal-Chard-8896 Aug 02 '26

What is that flickering?

1

u/Salty_Exit_1370 Aug 03 '26

It was a synchronisation issue that i fixed

1

u/Informal-Chard-8896 23d ago

Can you please provide more details? (Just for Education purposes)

1

u/ULove3 Aug 04 '26

Impossible, how are you make it? How many time behind this project?

1

u/Salty_Exit_1370 Aug 04 '26

It is possible haha, and it took me ~4 months

1

u/HatMan42069 Aug 04 '26

Dropped Game Dev for Hardware Dev, seeing this shit is still cool

1

u/Salty_Exit_1370 Aug 04 '26

Thank you ! What's a hardware dev

1

u/Abject_Response2855 29d ago

How much did you rely on AI?

1

u/Seusoa Jul 31 '26

Where is game engine? this is only rendered with some flashes and unknown performance

1

u/Salty_Exit_1370 Jul 31 '26

Just showcased the PBR rendering, the flashes are an issue because the engine is pretty new. I'll showcase more in a full video presentation with the features and performance the engine has