124 lines
2.8 KiB
JavaScript
124 lines
2.8 KiB
JavaScript
const Glib = require('./Glib');
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const Vector = require('./Vector');
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const ORIGIN = new Vector(0, 0);
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const DIRECTIONS = {
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UP: new Vector(0, 1),
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DOWN: new Vector(0, -1),
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LEFT: new Vector(-1, 0),
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RIGHT: new Vector(1, 0),
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};
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class Rectangle {
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static fromPoints(one, two) {
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const [x1, x2] = [one.v[0], two.v[0]].sortInts();
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const [y1, y2] = [one.v[1], two.v[1]].sortInts();
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const bottomLeft = new Vector(x1, y1);
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const size = bottomLeft
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.multiply(-1)
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.add(new Vector(x2, y2))
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.add(1n);
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return new Rectangle(bottomLeft, size);
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}
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static fromXXYY(x1, x2, y1, y2) {
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return Rectangle.fromPoints(new Vector(x1, y1), new Vector(x2, y2));
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}
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constructor(offset, size) {
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// console.log(`${offset.string} ${offset.add(size).string}`);
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// todo: normalize?
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this.offset = offset;
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this.size = size;
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}
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allPoints() {
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return new Glib(
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(function*(_this) {
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const [startX, startY] = _this.offset.toArray();
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const [endX, endY] = _this.offset.add(_this.size).toArray();
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for (let x = startX; x < endX; x++) {
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for (let y = startY; y < endY; y++) {
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yield new Vector(x, y);
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}
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}
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})(this),
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);
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}
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get bottomLeft() {
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return this.offset;
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}
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get topRight() {
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return this.offset.add(this.size);
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}
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}
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class Instruction {
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static fromString(string, instructionSet) {
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const [char, ...num] = string.split('');
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if (!instructionSet.hasOwnProperty(char)) {
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throw new Error('invalid move');
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}
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const move = instructionSet[char];
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return num.length === 0
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? new Instruction(move)
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: new Instruction(move, BigInt(num.join('')));
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}
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constructor(move, count = 1n) {
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this.move = move;
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this.count = count;
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}
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jump(source) {
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// console.log(this.count);
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return source.add(this.move.multiply(this.count));
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}
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walk(source) {
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return new Glib(
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(function*(_this) {
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for (let i = 0n; i < _this.count; i++) {
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// console.log(source.string);
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source = source.add(_this.move);
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yield source;
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}
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// console.log(source.string);
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})(this),
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);
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}
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}
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module.exports = {
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Instruction,
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Rectangle,
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DIRECTIONS,
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ORIGIN,
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'^v<>': {
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'^': DIRECTIONS.UP,
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v: DIRECTIONS.DOWN,
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'<': DIRECTIONS.LEFT,
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'>': DIRECTIONS.RIGHT,
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},
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udlr: {
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u: DIRECTIONS.UP,
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d: DIRECTIONS.DOWN,
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l: DIRECTIONS.LEFT,
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r: DIRECTIONS.RIGHT,
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},
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UDLR: {
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U: DIRECTIONS.UP,
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D: DIRECTIONS.DOWN,
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L: DIRECTIONS.LEFT,
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R: DIRECTIONS.RIGHT,
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},
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everyStep(instructions, source = ORIGIN) {
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return new Glib(
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(function*() {
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for (const instruction of instructions) {
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// console.log(instruction);
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yield* instruction.walk(source);
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source = instruction.jump(source);
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}
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})(),
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);
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},
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};
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