A collection of the top 10 notebooks created in 2020 by the community based on most viewed.

Atthar Mirza

The coronavirus pandemic ends when this chart shrinks again

Ryan Murphy

ActBlue Ticker Tracker

Tom Larkworthy

Ridiculously Rapid Software-as-a-Service (SaaS) development with Observable, Firebase and Stripe

Ernesto Laval

Coronavirus worldwide evolution

Pierre Ripoll

How to visualize periodicity ?

Yaroslav Sergienko

3d engine in DNA code

Lionel Radisson

Observable & creative coding

David Eads

COVID-19 in Illinois

Historical Illinois COVID-19 ZIP code data

Most favorited Hacker News posts of all time

Shirley Wu

Introduction to SVG and D3.js

Observable

2020 Year in Review

Top 10 Most Viewed Notebooks in 2020

Is it a raymarching loop? How do you cope without the help of `normalize`?

Kompany

Usual implementation of raymarching uses incremental updates along the ray equal to SDF (SDF is thought as a minimal distance to the object). It requires exact parametrization of the ray according to Euclidean norm.

This implementation only requires, that SDF is positive outside the object and negative inside. So the point moves along the ray with the speed proportional to the SDF. It works like a feedback-loop system and does not rely on measuring exact Euclidean distances along the ray.

So, this way we can get exact final point position without knowing ray vector norm.

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