The avatar for @rreusser
Ricky Reusser
Public
Edited
Sep 4, 2023
7 forks
180 stars
WebGL
Ueda's AttractorJacobi Elliptic Functions in the Complex PlaneSDF Points with reglClifford and de Jong AttractorsDrawing Instanced Lines with reglInstanced Line RenderingLawson's Klein BottleInteractive Multi-scale Turing PatternsSelecting the Right Opacity for 2D Point CloudsAdaptive Contouring in Fragment ShadersBaker's MapFake Transparency for 3D SurfacesGPU BoidsDouble Compound Pendulums3D Reaction-DiffusionMathematical Easter Egg ColoringToiletpaperfullerenes and Charmin NanotubesQuasicrystalsObservable + regl
2D (Non-physical) N-body Gravity with Poisson's Equation
Periodic Planar Three-Body OrbitsQuick (miterless) Lines in WebGLSpin WebGLicosphereregl-cameraFinding Roots in the Complex Planeglsl-complexglsl-complex-auto-differentiationDomain Coloring with Adaptive Contouringgl-mat3gl-mat4gl-vec4gl-quatgl-mat2gl-vec3gl-vec2Instanced WebGL Circlesregl-toolsDomain Coloring for Complex FunctionsContour Plots with regl Observable PlotDrawing indexed mesh data as screen-space normals without duplicating dataGPUs, FFTs, and the 1-D Schrödinger Equation
Also listed in…
More or less finished notebooks
Observable's Instagram Shares
Math
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function pdf(x, y) {
// PDF used for sampling initial positions. x and y in [0, 1], and returned value is in [0, 1].
return 1.0;

// Lots of little bumps:22
//return 0.9 + 0.1 * Math.cos(x * Math.PI * 16) * Math.sin(y * Math.PI * 16);

// Circular blob:
//var r2 = x * x + y * y;
//if (r2 > 0.2) return 0;
//return Math.exp(-r2 / Math.pow(0.3, 2));
}
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function initialVelocity(out, x, y) {
out[0] = 0;
out[1] = 0;
return;

/*return [
0.0 * -Math.cos(x * Math.PI * 16) * Math.cos(y * Math.PI * 16),
0.0 * Math.sin(x * Math.PI * 16) * Math.sin(y * Math.PI * 16)
];*/

// Roughly circular orbit speed:
//var r = Math.sqrt(x * x + y * y);
//var speed =
// (4.5 - 3.5 * r + 0.5 * r * (1 - r)) * Math.pow(512 / gridTextureRadius, 1);
//out[0] = y * speed;
//out[1] = -x * speed;
}
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