Initial euler golf sol

This commit is contained in:
Elizabeth Hunt 2023-02-23 10:15:07 -07:00
parent 93c8bbeb6a
commit 77bcd2b2f2
Signed by: simponic
GPG Key ID: 52B3774857EB24B1
5 changed files with 456 additions and 33 deletions

38
euler-golf/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<title>Euler Golf 2</title>
<style>
body {
margin: 0;
padding: 0;
overflow: scroll;
font-family: Lucida Console, Lucida Sans Typewriter, monaco,
Bitstream Vera Sans Mono, monospace;
}
.canvas-holder canvas {
padding: 0;
margin: auto;
display: block;
height: 70vh;
width: auto;
max-width: 100%;
}
.button {
border: 1px solid black;
border-radius: 5px;
padding: 5px;
cursor: pointer;
}
</style>
</head>
<body>
<canvas id="canvas"></canvas>
<script src="js/cx.js"></script>
<script src="js/sol.js"></script>
<script src="js/game.js"></script>
</body>
</html>

308
euler-golf/js/cx.js Normal file
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// http://www.russellcottrell.com/fractalsEtc/cx.js
class cx {
static degrees(d) {
cx._RD = d ? Math.PI / 180 : 1;
}
// Math.PI/180 for degrees, 1 for radians
// applies to i/o (constructor, get/set arg, and toString etc.)
constructor(x, y, polar) {
if (!polar) {
this.re = x;
this.im = y;
} else {
y *= cx._RD; // may be radians or degrees
this.re = x * Math.cos(y);
this.im = x * Math.sin(y);
}
}
get abs() {
return Math.sqrt(this.re * this.re + this.im * this.im);
}
set abs(r) {
var theta = this._arg;
this.re = r * Math.cos(theta);
this.im = r * Math.sin(theta);
}
get arg() {
// returns radians or degrees, non-negative
return (
((Math.atan2(this.im, this.re) + 2 * Math.PI) % (2 * Math.PI)) / cx._RD
);
}
set arg(theta) {
// may be radians or degrees
var r = this.abs;
this.re = r * Math.cos(theta * cx._RD);
this.im = r * Math.sin(theta * cx._RD);
}
get _arg() {
// internal; returns radians
return Math.atan2(this.im, this.re);
}
static get i() {
return new cx(0, 1);
}
static set i(x) {
throw new Error("i is read-only");
}
toString(polar) {
if (!polar)
return (
this.re.toString() +
(this.im >= 0 ? " + " : " - ") +
Math.abs(this.im).toString() +
"i"
);
else return this.abs.toString() + " cis " + this.arg.toString();
}
toPrecision(n, polar) {
if (!polar)
return (
this.re.toPrecision(n) +
(this.im >= 0 ? " + " : " - ") +
Math.abs(this.im).toPrecision(n) +
"i"
);
else return this.abs.toPrecision(n) + " cis " + this.arg.toPrecision(n);
}
toPrecis(n, polar) {
// trims trailing zeros
if (!polar)
return (
parseFloat(this.re.toPrecision(n)).toString() +
(this.im >= 0 ? " + " : " - ") +
parseFloat(Math.abs(this.im).toPrecision(n)).toString() +
"i"
);
else
return (
parseFloat(this.abs.toPrecision(n)).toString() +
" cis " +
parseFloat(this.arg.toPrecision(n)).toString()
);
}
toFixed(n, polar) {
if (!polar)
return (
this.re.toFixed(n) +
(this.im >= 0 ? " + " : " - ") +
Math.abs(this.im).toFixed(n) +
"i"
);
else return this.abs.toFixed(n) + " cis " + this.arg.toFixed(n);
}
toExponential(n, polar) {
if (!polar)
return (
this.re.toExponential(n) +
(this.im >= 0 ? " + " : " - ") +
Math.abs(this.im).toExponential(n) +
"i"
);
else return this.abs.toExponential(n) + " cis " + this.arg.toExponential(n);
}
static getReals(c, d) {
// when c or d may be simple or complex
var x, y, u, v;
if (c instanceof cx) {
x = c.re;
y = c.im;
} else {
x = c;
y = 0;
}
if (d instanceof cx) {
u = d.re;
v = d.im;
} else {
u = d;
v = 0;
}
return [x, y, u, v];
}
static conj(c) {
return new cx(c.re, -c.im);
}
static neg(c) {
return new cx(-c.re, -c.im);
}
static add(c, d) {
var a = cx.getReals(c, d);
var x = a[0];
var y = a[1];
var u = a[2];
var v = a[3];
return new cx(x + u, y + v);
}
static sub(c, d) {
var a = cx.getReals(c, d);
var x = a[0];
var y = a[1];
var u = a[2];
var v = a[3];
return new cx(x - u, y - v);
}
static mult(c, d) {
var a = cx.getReals(c, d);
var x = a[0];
var y = a[1];
var u = a[2];
var v = a[3];
return new cx(x * u - y * v, x * v + y * u);
}
static div(c, d) {
var a = cx.getReals(c, d);
var x = a[0];
var y = a[1];
var u = a[2];
var v = a[3];
return new cx(
(x * u + y * v) / (u * u + v * v),
(y * u - x * v) / (u * u + v * v)
);
}
static pow(c, int) {
if (Number.isInteger(int) && int >= 0) {
var r = Math.pow(c.abs, int);
var theta = int * c._arg;
return new cx(r * Math.cos(theta), r * Math.sin(theta));
} else return NaN;
}
static root(c, int, k) {
if (!k) k = 0;
if (
Number.isInteger(int) &&
int >= 2 &&
Number.isInteger(k) &&
k >= 0 &&
k < int
) {
var r = Math.pow(c.abs, 1 / int);
var theta = (c._arg + 2 * k * Math.PI) / int;
return new cx(r * Math.cos(theta), r * Math.sin(theta));
} else return NaN;
}
static log(c) {
return new cx(Math.log(c.abs), c._arg);
}
static exp(c) {
var r = Math.exp(c.re);
var theta = c.im;
return new cx(r * Math.cos(theta), r * Math.sin(theta));
}
static sin(c) {
var a = c.re;
var b = c.im;
return new cx(Math.sin(a) * Math.cosh(b), Math.cos(a) * Math.sinh(b));
}
static cos(c) {
var a = c.re;
var b = c.im;
return new cx(Math.cos(a) * Math.cosh(b), -Math.sin(a) * Math.sinh(b));
}
static tan(c) {
return cx.div(cx.sin(c), cx.cos(c));
}
static asin(c, k) {
if (!k) k = 0;
var ic = cx.mult(cx.i, c);
var c2 = cx.pow(c, 2);
return cx.mult(
cx.neg(cx.i),
cx.log(cx.add(ic, cx.root(cx.sub(1, c2), 2, k)))
);
}
static acos(c, k) {
if (!k) k = 0;
var c2 = cx.pow(c, 2);
return cx.mult(
cx.neg(cx.i),
cx.log(cx.add(c, cx.mult(cx.i, cx.root(cx.sub(1, c2), 2, k))))
);
}
static atan(c) {
return cx.mult(
cx.div(cx.i, 2),
cx.log(cx.div(cx.add(cx.i, c), cx.sub(cx.i, c)))
);
}
static sinh(c) {
var a = c.re;
var b = c.im;
return new cx(Math.sinh(a) * Math.cos(b), Math.cosh(a) * Math.sin(b));
}
static cosh(c) {
var a = c.re;
var b = c.im;
return new cx(Math.cosh(a) * Math.cos(b), Math.sinh(a) * Math.sin(b));
}
static tanh(c) {
return cx.div(cx.sinh(c), cx.cosh(c));
}
static asinh(c, k) {
if (!k) k = 0;
var c2 = cx.pow(c, 2);
return cx.log(cx.add(c, cx.root(cx.add(c2, 1), 2, k)));
}
static acosh(c, k) {
if (!k) k = 0;
var c2 = cx.pow(c, 2);
return cx.log(cx.add(c, cx.root(cx.sub(c2, 1), 2, k)));
}
static atanh(c) {
return cx.mult(cx.div(1, 2), cx.log(cx.div(cx.add(1, c), cx.sub(1, c))));
}
static copy(c) {
return new cx(c.re, c.im);
}
static eq(c, d, epsilon) {
if (!epsilon) {
if (c.re == d.re && c.im == d.im) return true;
} else {
if (Math.abs(c.re - d.re) < epsilon && Math.abs(c.im - d.im) < epsilon)
return true;
}
return false;
}
}
cx.degrees(true); // need to call this

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euler-golf/js/game.js Normal file
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const WIDTH = 1000;
const HEIGHT = 1000;
const draw_grid = (ctx) => {};
const main = () => {
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
};
main();

44
euler-golf/js/sol.js Normal file
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const DEPTH = 7;
const DIRECTION = {
0: new cx(0, 1),
1: new cx(0, -1),
};
const move = (prev, curr, c) => cx.add(prev, cx.mult(c, cx.sub(curr, prev)));
const construct_moves = (curr, prev) =>
Object.keys(DIRECTION).map((x) => move(curr, prev, DIRECTION[x]));
const backtrack = (local_index, depth) =>
local_index
.toString(2)
.padStart(depth, "0")
.split("")
.reverse()
.map((dir) => (dir ? "+" : "-"));
const sol = (target, start_from = new cx(0, 0), start_to = new cx(1, 0)) => {
let moves = construct_moves(start_from, start_to);
let curr_depth = 2; // potential bug: when target is within one move away
do {
for (let i = 0; i < Math.pow(2, curr_depth); i++) {
const current_i =
(i >> 1) + ((1 - Math.pow(2, curr_depth - 1)) / (1 - 2) - 1);
const previous_i =
(i >> 2) + ((1 - Math.pow(2, curr_depth - 2)) / (1 - 2) - 1);
const new_move = move(
previous_i < 0 ? start_from : moves[previous_i],
moves[current_i],
DIRECTION[parseInt(i.toString(2)[0])]
);
if (cx.eq(new_move, target)) return backtrack(moves, target);
moves.push(new_move);
}
curr_depth++;
} while (curr_depth < DEPTH);
console.log(moves);
return null;
};

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<h1>DVD Logo Bouncing Animation</h1> <h1>Julia Set Explorer</h1>
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@ -52,29 +78,25 @@
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</div> </div>
<div class="project-body"> <div class="project-body">
<h1>Julia Set Explorer</h1> <h1>DVD Logo Bouncing Animation</h1>
<p>Zoom, pan, and "c" complex changes in this fun GPU-accelerated playground!</p> <p>
</div> Brings back the nostalgia of old-school DVD players with an
</div> intersection predictor. The twist: no Canvas API! Only svg's and
absolute positioned images!
<div class="project" onclick="window.location='ft-visualizer/index.html'"> </p>
<div class="project-logo-container">
<i class="fa-solid fa-wave-square"></i>
</div>
<div class="project-body">
<h1>Discrete Fourier Visualizer</h1>
<p>Draw how your year has gone and view a reactive graph containing its DFT by dragging your mouse over the canvas!</p>
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