Does anyone know a working visualiser more similar to Geiss?
I had looked into an older version of projectM and the logic is pretty simple overall: use the current frame as a texture and render it to a slightly distorted grid. Then render a new wave on top.
The grid distortion causes all the motion. But the distortion is static over the lifetime of the animation.
A bit more is needed to make it look decent but this was the main loop iirc. A few hundred lines of OpenGL code.
Geiss looks nice, I think it needs more variation on the frame projection and wave drawing.
Geiss felt a lot closer to the actual music being played, the patterns and movement were much more viscerally associated with the music from which it was being generated.
Having said that, there are some absolutely beautiful visualisations in milkdrop and ProjectM.
Edited to add: milkdrop is Geiss plus other things. Like the modern internet is the old internet plus other things. I think I might be "old man golden-aging" about Geiss. I think I just need to spend time tuning Milkdrop / ProjectM to my preferences (basically turn off the patterns I don't like). I don't have the time like I used to :/