sishiya (しし屋)

I build small apps that run in the browser: science sims (Manabi Lab — black holes, the human gut, viruses, waves) and small games (Asobi Lab). Physics stays honest and sources are on screen. JP/EN. M

Japan Joined on Oct 14, 2026 https://sishiya.github.io/

sishiya (しし屋)

Oct 22

Solving WiFi waves on 0.75 cm cells in WebGL2 (FDTD, and correcting for a coarse grid)

#webgl #javascript #physics #simulation

4 min read

sishiya (しし屋)

Oct 22

Tearing the Earth with your finger: 16,000-particle SPH in a Web Worker

#javascript #webdev #physics #simulation

4 min read

sishiya (しし屋)

Oct 22

Teaching spring-and-joint creatures to walk with a genetic algorithm (hand-written 2D physics)

#javascript #algorithms #physics #simulation

3 min read

sishiya (しし屋)

Oct 22

Computing how 'old' the air in each room is (ventilation network + 2D flow + age of air)

#javascript #simulation #physics #science

4 min read

sishiya (しし屋)

Oct 22

Solving an influenza-and-immunity model in the browser (ODEs, RK4, and three gotchas)

#javascript #simulation #science #math

4 min read

sishiya (しし屋)

Oct 16

Inside a pupa you can rewind: deriving every frame from t alone (Canvas 2D)

#javascript #canvas #science #simulation

4 min read

sishiya (しし屋)

Oct 14

Solving the Schrödinger equation in the browser and matching tunneling to theory

#javascript #physics #simulation #science

4 min read

sishiya (しし屋)

Oct 14

One garden through 14 kinds of eyes: UV, heat, echoes and compound eyes as shader passes

#threejs #webgl #javascript #science

4 min read

sishiya (しし屋)

Oct 14

Tracing light around a spinning black hole in the browser (WebGL2, no libraries)

#webgl #javascript #physics #simulation

7 min read

sishiya (しし屋)

Oct 14

Diving through the digestive tract in 3D: cutting holes where tubes meet, in the shader

#threejs #webgl #javascript #simulation

4 min read

sishiya (しし屋)

Oct 14

Recomputing 4.6 billion years of Earth with a box model that never reads the timeline

#javascript #threejs #simulation #science

4 min read

DEV Community

sishiya (しし屋)

Badges

Writing Debut

Solving WiFi waves on 0.75 cm cells in WebGL2 (FDTD, and correcting for a coarse grid)

Tearing the Earth with your finger: 16,000-particle SPH in a Web Worker

Teaching spring-and-joint creatures to walk with a genetic algorithm (hand-written 2D physics)

Computing how 'old' the air in each room is (ventilation network + 2D flow + age of air)

Solving an influenza-and-immunity model in the browser (ODEs, RK4, and three gotchas)

Inside a pupa you can rewind: deriving every frame from t alone (Canvas 2D)

Solving the Schrödinger equation in the browser and matching tunneling to theory

One garden through 14 kinds of eyes: UV, heat, echoes and compound eyes as shader passes

Tracing light around a spinning black hole in the browser (WebGL2, no libraries)

Diving through the digestive tract in 3D: cutting holes where tubes meet, in the shader

Recomputing 4.6 billion years of Earth with a box model that never reads the timeline