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#include "Adafruit_seesaw.h"
#include <seesaw_neopixel.h>
#include <Joystick.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SS_SWITCH 24 // this is the pin on the encoder that connects to the momentary switch
#define SEESAW_BASE_ADDR 0x36 // I2C address, starts with 0x36
#define SCREEN_WIDTH 128 // OLED display width, in pixels
const { abs, log } = Math;
const log10 = (v) => log(v) / log(10);
const XMLNS = "http://www.w3.org/2000/svg";
const element = (tag, attributes = []) => {
const e = document.createElementNS(XMLNS, tag);
Object.entries(attributes).forEach(([key, value]) => set(e, key, value));
return e;
};
const set = (e, key, value) => e.setAttribute(key, value);
/**
* This is a function for use with JSON.stringify(input, sortedObjectKeys, number)
* that ensures that object keys are sorted in alphanumerical order.
*/
export function sortedObjectKeys(_, data) {
// Ignore primitives.
if (data === null) return null;
if (typeof data !== "object") return data;
// Also ignore iterables, which are type "object" but should not be sorted.
@Pomax
Pomax / tangents.pde
Last active June 11, 2021 18:43
This sketch illustrates the inner and outer tangents between two circles
int dim;
ArrayList<Circle> circles;
boolean moving = false;
/**
* simple (x,y) point class
*/
class Point {
float x, y;
(function buildTagFunctions(global) {
// Just enough tags to generate all the client content
const tags = [
`a`,
`button`,
`div`,
`footer`,
`h1`,
`h2`,
`li`,
@Pomax
Pomax / task-timer.js
Last active March 1, 2019 00:06
A JS taskrunner with timeout capability
/**
* A resolver class that will run the function
* passed as `startWaiting`, with a concurrent
* timeout running that will trigger the
* `timeoutFunction` function after a specific
* number of milliseconds.
*
* This timeout can be paused using `.pause()`,
* which will return a promise that can be
* `await`ed to effect a non-blocking "pause".
@Pomax
Pomax / tree.js
Created April 7, 2016 23:46
A silly but effective JS tree datastructure
/**
* Basic tree implementation.
*/
function Tree(value) {
this.value = value || false;
this.parent = false;
this.children = [];
};
Tree.prototype = {
@Pomax
Pomax / moo.md
Created November 15, 2015 14:32
programming some geometry in Type2 Charstrings

Writing Type2 sin(x) and cos(x) functions

If we want to make a font in which the glyphs are turned some random amount, we'll need to make sure we have a rotate function available. Normally, this is something you do with a rotation matrix, but that rotation matrix depends on trigonometric functions, and Type2 charstring instructions don't come with a trig. library, so ... we need to write our own!

In fact, let's use Bhaskara I's method of "sort of kind of" approximating a sine wave -or rather half of one- by using a relatively simple expression:

                 4x(π-x)
sin(x) = 4 * ----------------
              5π^2 - 4x(π-x)
@Pomax
Pomax / browse.js
Created March 10, 2015 02:56
Save as "browse.js", run with "node browse", instant image folder browser. Because I'm lazy
/**
* First things first: I am *lazy*. I will write a tool to do the thing I want to
* do so I don't have to do it a second time, ever. Or until a new programming
* language comes around. Generally the latter, but enough about that:
*
* This is a Node.js utility for taking the dir you are in right now, firing up
* an express server, and giving you image browsing on localhost:8080 with simple
* left/right controls once you're actually viewing images, and "up" control to
* go up a directory.
*
@Pomax
Pomax / rgbhanalysis.js
Last active September 30, 2019 07:25
Sort a collection of images based on their dominant hue, and show the rgb+h analysis in a nice little image alongside.
(function bookmarklet(window) {
var document = window.document;
var body = document.body;
/**
* Sort a collection of images based on their dominant hue,
* and show the rgb+h analysis in a nice little image alongside.
*
* for instance, use this bookmarklet on