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advent-of-code-2017/22/src/Day22.js /
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| import React, { Component } from "react"; | |
| const input = ` | |
| .#...#.#.##..##....##.#.# | |
| ###.###..##...##.##....## | |
| ....#.###..#...#####..#.# | |
| .##.######..###.##..#...# | |
| #..#..#..##..###...#..### | |
| ..####...#.##.#.#.##.#### | |
| #......#..####..###..###. | |
| #####.##.#.#.##.###.#.#.# | |
| .#.###....###....##....## | |
| .......########.#.#...#.. | |
| ...###.####.##..###.##..# | |
| #.#.###.####.###.###.###. | |
| .######...###.....#...... | |
| ....##.###..#.#.###...##. | |
| #.###..###.#.#.##.#.##.## | |
| #.#.#..###...###.###..... | |
| ##..##.##...##.##..##.#.# | |
| .....##......##..#.##...# | |
| ..##.#.###.#...#####.#.## | |
| ....##..#.#.#.#..###.#..# | |
| ###..##.##....##.#....##. | |
| #..####...####.#.##..#.## | |
| ####.###...####..##.#.#.# | |
| #.#.#.###.....###.##.###. | |
| .#...##.#.##..###.#.###.. | |
| ` | |
| .split("\n") | |
| .filter(row => row.length > 0); | |
| const GridRow = ({ row, x, y, ry }) => | |
| row.map((cell, i) => ( | |
| <div | |
| style={{ | |
| background: | |
| y === ry && x === i | |
| ? "red" | |
| : cell === "#" ? "black" : "white", | |
| width: "5px", | |
| height: "5px", | |
| display: "inline-block" | |
| }} | |
| key={i} | |
| > | |
| | |
| </div> | |
| )); | |
| const Grid = ({ grid, x, y }) => | |
| grid.map((row, i) => ( | |
| <div key={i} style={{ display: "flex", justifyContent: "center" }}> | |
| <GridRow row={row} x={x} y={y} ry={i} /> | |
| </div> | |
| )); | |
| const Width = 180, | |
| offset = 23; | |
| class Day22 extends Component { | |
| state = { | |
| grid: new Array(Width).fill(".").map((_, i) => { | |
| let row = | |
| i > Math.floor(Width / 2 - input.length / 2 - offset) | |
| ? input[ | |
| i - Math.floor(Width / 2 - input.length / 2 - offset) | |
| ] | |
| : null; | |
| let a = new Array(Width).fill("."); | |
| if (row) { | |
| a.splice( | |
| Width / 2 - row.length / 2 + offset, | |
| row.length, | |
| ...row | |
| ); | |
| } | |
| return a; | |
| }), | |
| x: Math.floor(Width / 2) + offset, | |
| y: Math.floor(Width / 2) - offset, | |
| vx: 0, | |
| vy: -1, | |
| bursts: 0, | |
| infected: 0 | |
| }; | |
| componentDidMount() { | |
| this.burstActivity(); | |
| } | |
| burstActivity() { | |
| const { x, y, bursts, grid } = this.state; | |
| let { vx, vy, infected } = this.state; | |
| if (grid[y][x] === "#") { | |
| grid[y][x] = "."; | |
| [vx, vy] = this.turnRight(vx, vy); | |
| } else { | |
| grid[y][x] = "#"; | |
| infected += 1; | |
| [vx, vy] = this.turnLeft(vx, vy); | |
| } | |
| if (Math.abs(vx) > 1 || Math.abs(vy) > 1) { | |
| console.log("JUMP", vx, vy); | |
| } | |
| this.setState({ | |
| x: x + vx, | |
| y: y + vy, | |
| vx, | |
| vy, | |
| grid, | |
| infected, | |
| bursts: bursts + 1 | |
| }); | |
| if (bursts + 1 < 10000) { | |
| requestAnimationFrame(() => this.burstActivity()); | |
| } | |
| } | |
| turnLeft(vx, vy) { | |
| let _vx = -1 * vy; | |
| vy = vx; | |
| return [_vx, vy]; | |
| } | |
| turnRight(vx, vy) { | |
| let _vx = vy; | |
| vy = -1 * vx; | |
| return [_vx, vy]; | |
| } | |
| render() { | |
| const { grid, width, bursts, x, y, infected } = this.state; | |
| return ( | |
| <div> | |
| <h3 style={{ display: "flex", justifyContent: "center" }}> | |
| bursts: {bursts}, pos: ({x}, {y}), infected: {infected} | |
| </h3> | |
| <div style={{ border: "1px solid red" }}> | |
| <Grid grid={grid} x={x} y={y} /> | |
| </div> | |
| </div> | |
| ); | |
| } | |
| } | |
| export default Day22; |