Hacker News: PiXeL161616

New comment by PiXeL161616 in "Poisson Disk Sampling"

PiXeL161616 — Wed, 02 Sep 2026 20:00:32 +0000

Never found a way to do this per-pixel in a shader, Bridson's needs the active list. Ended up hashing cells and jittering inside them instead.

New comment by PiXeL161616 in "Fractal Jittered Voronoi Partitions"

PiXeL161616 — Tue, 01 Sep 2026 16:20:39 +0000

Fractal jitter has a trap worth knowing if you use this for feature placement rather than just partitioning. If you domain-warp the field, the warp has to scale with the cell size. A fixed-wavelength warp just translates the small cells instead of deforming them, so the fine scales still read as clones of each other even though the coarse ones look fine.

Two others that bought us a lot: give the features a power-law size distribution, and jitter across the whole cell rather than a safe fraction of it. Undersized jitter leaves a ghost of the original lattice that you can see long before you can name it.

New comment by PiXeL161616 in "Hilariously fast volume computation with the divergence theorem (2018)"

PiXeL161616 — Fri, 28 Aug 2026 18:45:52 +0000

Voxelising, most likely. The naive way's to rasterise the mesh into a 3D grid and count the cells inside, which really is rendering and then sampling the result. It costs resolution cubed instead of triangle count, and the answer's only ever as good as the grid.

New comment by PiXeL161616 in "[dead]"

PiXeL161616 — Wed, 08 Nov 2023 21:31:11 +0000

Techniques for leveraging Impostor Syndrome to enhance your role as a manager while emphasizing the significance of embracing discomfort, fostering self-awareness, and cultivating a culture of continuous learning.