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https://github.com/evanw/theta
https://github.com/evanw/theta
Last synced: 21 days ago
JSON representation
- Host: GitHub
- URL: https://github.com/evanw/theta
- Owner: evanw
- License: other
- Created: 2015-12-22T16:52:40.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2021-05-04T17:42:20.000Z (about 3 years ago)
- Last Synced: 2024-02-18T16:38:05.973Z (4 months ago)
- Language: JavaScript
- Homepage: http://thetamath.com
- Size: 2.46 MB
- Stars: 716
- Watchers: 24
- Forks: 40
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
Lists
- awesome-stars - evanw/theta - (JavaScript)
- my-awesomes-stars - theta - (JavaScript)
README
# Theta
Website: http://thetamath.com
This is a simple web app that graphs an equation and allows you to pan and zoom around the coordinate grid. It was my winter 2015-2016 break project, developed here and there over two weeks. Interesting bits:
* Custom equation editor with exponents, fractions, and other stuff
* Live errors inline as you type, sort of like an IDE
* GPU-powered anti-aliased equation rendering, handles equations that are impossible to solve
* Custom text rendering using subpixel anti-aliasing and GPU quadratic curve evaluation (see the article [Easy Scalable Text Rendering on the GPU](https://medium.com/@evanwallace/c3f4d782c5ac) for a detailed description)
* Uses the [Skew](http://skew-lang.org/) programming language and the [GLSLX](http://evanw.github.io/glslx/) compiler, ends up as a [few dozen kilobytes](http://thetamath.com/compiled.js) of optimized JavaScript
* Abuses GitHub's custom 404 handler to make bookmarkable URLs without needing a hosting provider :)
Examples:
* http://thetamath.com/app/y=sin(3x+sin4(y+sin2(x+siny)))
* http://thetamath.com/app/sin(x-cosπy)≤sin(y+cosπx)
* http://thetamath.com/app/ysqrt(y^2+x^2)=x
* http://thetamath.com/app/sin(2lnr+θ)≤0