Simulating 2D Gravity with Compute Shaders in Godot
89A code walkthrough for a 2D N-Body particle sim experiment, in Godot 4, using GLSL compute shaders.
Learning new stuff is great! Don't hesitate to let me know if you see bugs or have advice on how to improve it.
Open Source available on GitHub: https://github.com/ThePathfindersCodex
00:00 Particle Sim Overview
04:35 GDScript Code
14:34 GLSL Compute Shader Code
23:52 Gaps and Issues
27:47 Bring It All Together
Purpose:
TECH DEMO and CODE WALKTHRU - code overview for the project covered in earlier shader experiments videos
HANDS ON CODE LEARNING - code available on GitHub to try yourself
Stuff covered:
a GLSL compute shader with more than one pass
using typed packed arrays in Godot
using a subviewport for zoom-like effects
pairwise 2D Newtonian gravity and collision detection/resolution in the shader during the sim pass 1
manually rasterizing circles to draw all dots during the draw pass 2
a roll-your-own performance graph in it's own subviewport