adorable facade in Yerevan, which is also a #reference

naive attempt to reproduce https://www.shadertoy.com/view/msKSDm

debugging ever first raymarched 3D object
(my mistake was to assume .33*3==1)

oh no, it's still not 3D, it's ~2.73D

https://www.shadertoy.com/view/dt2fR1

— for this to work, you need an integer number of quotes"
— r u drunk?

just a pretty xorg glitch I fixed by removing intel video driver

cheat sheet for quick video edits

trim to first 10 seconds:
ffmpeg -i input.mp4 -t 10 output.mp4

trim from 24 seconds in, for 10 seconds:
ffmpeg -i input.mp4 -ss 24 -t 10 output.mp4

slow down video (e.g., 2x slower):
ffmpeg -i input.mp4 -vf "setpts=PTS*2" output.mp4

speed up video (e.g., 1.3x faster):
ffmpeg -i input.mp4 -vf "setpts=PTS/1.3" output.mp4

resize video to 700px wide, keeping aspect ratio:
ffmpeg -i input.mp4 -vf "scale=700:-2" output.mp4

combine resize and speed up options:
ffmpeg -i input.mp4 -vf "scale=700:-2,setpts=PTS/1.3" output.mp4

remove audio:
ffmpeg -i input.mp4 -an -c:v copy output.mp4

get detailed video file info:
ffprobe input.mp4

simple galaxy simulation with vertex shader

https://github.com/sleeping-h/webgl-shader-templates/blob/main/templates/vertex-galaxy.html

midnight qgis posting

every ~2.5 years I update WM settings with larger screen width. and my new display is still not 4k 😅

something broke, a minute ago it was a normal voronoi diagram

fixed https://www.shadertoy.com/view/XfGcz3

a little flash warning: when emulating key press, don't forget to key release

with numpy.fft + xlib I can send any keyboard events by snapping fingers. that means I can also bind music to the picture slideshow/changing browser tabs/switching workspaces. I almost have touchdesigner at home!