Godot 3D TPS Game: Using Kotlin or Java!

Use Java or Kotlin to build your 3D games with Godot 4!
Game is from the GDQuest 3D TPS Demo written in GDScript:
github.com/gdquest-demos/godot-4-3d-third-person-controller
The same game using Kotlin is here:
github.com/utopia-rise/godot-kotlin-3d-demo
Then head over to: Godot Kotlin/JVM: godot-kotl.in/en/stable/ and download their modified Godot editor.
My hardware:
CPU: Ryzen 5 5500
GPU: RTX 3050 8GB (original)
Monitor Resolution: 3840 x 2160 (4K @ 60 Hz)
RAM: 32 GB
OS: Windows 11
You need to build the project in IntelliJ first, then open the project in the Godot Kotlin/JVM Editor.
#java #javagamedevelopment #libgdx #3dgames #godot #godot4 #kotlin

[@SebastienGuillemin]

I'm guessing the performance difference between the benchmark you posted (which was one big computation, and where kotlin performs really well) and this game (which performs many frequent calls, and where kotlin is behind gdscript) is due to the cost of crossing the JNI boundary for each call, right?

[@AntzGames]

This is exactly correct. This project conducts benchmarks, and you can see the results here: github.com/utopia-rise/godot-kotlin-jvm/tree/master/harness/bunnymark They are working on batching the JNI calls and other performance goodies that will reduce the impact of the JNI calls. The interesting thing is with design changes to the BunnyMark code (they have 3 versions of it) you can make Godot Kotlin JVM 2.5x faster than GDScript all the way to 10% slower than GDScript. You can avoid the impact by making design changes in the node structure of your project.