• html--彩虹马

    文章目录

    html

    DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>Rainbow Space Unicorntitle>
<link rel="stylesheet" href="css/style.css">
head>
<body>
<img src="img/unicorn.png" alt="unicorn" id="unicorn" hidden>
<script  src="js/index.js">script>
body>
html>

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    js

    var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
window.addEventListener('DOMContentLoaded', init);
//#region classes
var Vector = /** @class */ (function () {
    function Vector() {
        this.x = 0;
        this.y = 0;
        this.vx = 0;
        this.vy = 0;
        this.angle = 0;
        this.va = 0.05;
    }
    return Vector;
}());
var Particle = /** @class */ (function (_super) {
    __extends(Particle, _super);
    function Particle() {
        var _this = _super !== null && _super.apply(this, arguments) || this;
        _this.id = Math.random().toString();
        _this.color = randomColor();
        _this.radius = 8;
        _this.opacity = 1;
        return _this;
    }
    return Particle;
}(Vector));
var Unicorn = /** @class */ (function (_super) {
    __extends(Unicorn, _super);
    function Unicorn(image) {
        var _this = _super.call(this) || this;
        _this.image = image;
        return _this;
    }
    return Unicorn;
}(Vector));
var Tile = /** @class */ (function (_super) {
    __extends(Tile, _super);
    function Tile() {
        var _this = _super !== null && _super.apply(this, arguments) || this;
        _this.color = randomColor();
        _this.width = 30;
        _this.height = 10;
        _this.opacity = 1;
        return _this;
    }
    return Tile;
}(Vector));
var ParticleFactory = /** @class */ (function () {
    function ParticleFactory() {
    }
    ParticleFactory.archive = function (p) {
        ParticleFactory.particleArchive[p.id] = Object.assign({}, p);
    };
    ParticleFactory.retrieve = function (p) {
        if (p.id in ParticleFactory.particleArchive) {
            return ParticleFactory.particleArchive[p.id];
        }
        return null;
    };
    ParticleFactory.create = function (options) {
        var p = new Particle();
        Object.assign(p, options);
        ParticleFactory.archive(p);
        return p;
    };
    ParticleFactory.reset = function (p) {
        var archivedVersion = ParticleFactory.retrieve(p);
        if (archivedVersion) {
            ;
            Object.assign(p, archivedVersion);
        }
    };
    ParticleFactory.particleArchive = {};
    return ParticleFactory;
}());
var Renderer = /** @class */ (function () {
    function Renderer($) {
        var _this = this;
        this.$ = $;
        this.renderParticle = function (p) {
            var $ = _this.$;
            var x = p.x, y = p.y, radius = p.radius, color = p.color, opacity = p.opacity;
            $.save();
            $.globalAlpha = opacity;
            $.fillStyle = color;
            $.translate(x, y);
            $.beginPath();
            $.arc(0, 0, radius, 0, PI2);
            $.fill();
            $.stroke();
            $.restore();
        };
        this.renderStar = function (p) {
            var $ = _this.$;
            var radius = p.radius, color = p.color, x = p.x, y = p.y, opacity = p.opacity;
            $.save();
            $.translate(x, y);
            $.fillStyle = color;
            $.globalAlpha = opacity;
            $.beginPath();
            for (var i = 5; i--;) {
                $.lineTo(0, radius);
                $.translate(0, radius);
                $.rotate(PI2 / 10);
                $.lineTo(0, -radius);
                $.translate(0, -radius);
                $.rotate(-((Math.PI * 6) / 10));
            }
            $.lineTo(0, radius);
            $.fill();
            $.stroke();
            $.restore();
        };
        this.renderTile = function (t) {
            var $ = _this.$;
            var x = t.x, y = t.y, width = t.width, height = t.height, color = t.color, opacity = t.opacity;
            $.save();
            $.globalAlpha = opacity;
            $.fillStyle = color;
            $.translate(x, y);
            $.beginPath();
            $.rect(0, 0, width, height);
            $.fill();
            $.stroke();
            $.restore();
        };
    }
    Renderer.prototype.clearScreen = function () {
        var $ = this.$;
        $.clearRect(0, 0, $.canvas.width, $.canvas.height);
    };
    Renderer.prototype.renderImage = function (img, x, y) {
        var $ = this.$;
        $.save();
        $.drawImage(img, x, y);
        $.restore();
    };
    Renderer.prototype.renderUnicorn = function (u) {
        this.renderImage(u.image, u.x, u.y);
    };
    return Renderer;
}());
//#endregion
//#region globals
var CANVAS = document.createElement('canvas');
var CTX = CANVAS.getContext('2d');
var WIDTH = (CANVAS.width = window.innerWidth);
var HEIGHT = (CANVAS.height = window.innerHeight);
var PI2 = 2 * Math.PI;
var GRAVITY = 0.125;
var COLOR_FADE = 0.01;
var COLORS = [
    '#9400D3',
    '#4B0082',
    '#0000FF',
    '#00FF00',
    '#FFFF00',
    '#FF7F00',
    '#FF0000'
];
var RENDERER = new Renderer(CTX);
var TILES = [];
var PARTICLES = [];
var PARTICLE_COUNT = 40;
var UNICORN_IMAGE = document.getElementById('unicorn');
var UNICORN = new Unicorn(UNICORN_IMAGE);
//#endregion
//#region utils
function randomColor() {
    return sample(COLORS);
}
function randomNumber(min, max) {
    return Math.random() * (max - min) + min;
}
function randomBoolean() {
    return Math.random() > 0.5;
}
function sample(a) {
    return a[Math.floor(Math.random() * a.length)];
}
function outsideScreen(p) {
    var diameter = p.radius * 2;
    var yExceeded = p.y - diameter > HEIGHT || p.y + diameter < 0;
    var xExceeded = p.x - diameter > WIDTH || p.x + diameter < 0;
    return yExceeded || xExceeded;
}
//#endregion
//#region animation
function updateParticle(p) {
    p.vy += GRAVITY;
    p.y += p.vy;
    p.x += p.vx;
    if (p.opacity > COLOR_FADE) {
        p.opacity -= COLOR_FADE;
    }
    if (outsideScreen(p)) {
        ParticleFactory.reset(p);
    }
}
function updateUnicorn(unicorn) {
    var image = unicorn.image;
    var centerX = WIDTH / 2 - image.width / 2;
    var centerY = HEIGHT / 2 - image.height / 2 - 50;
    var radiusX = 20;
    var radiusY = 8;
    unicorn.x = centerX + Math.cos(unicorn.angle) * radiusX;
    unicorn.y = centerY + Math.sin(unicorn.angle) * radiusY;
    unicorn.angle += unicorn.va;
}
function animation() {
    requestAnimationFrame(animation);
    RENDERER.clearScreen();
    TILES.forEach(updateTile);
    TILES.forEach(RENDERER.renderTile);
    PARTICLES.forEach(updateParticle);
    PARTICLES.forEach(RENDERER.renderStar);
    if (UNICORN_IMAGE.complete) {
        updateUnicorn(UNICORN);
        RENDERER.renderUnicorn(UNICORN);
    }
}
function createParticles() {
    for (var i = PARTICLE_COUNT; i > 0; --i) {
        var p = ParticleFactory.create({
            x: WIDTH / 2,
            y: HEIGHT / 2,
            vx: randomNumber(-14, -3),
            vy: randomNumber(-8, 2)
        });
        var i_1 = Math.floor(randomNumber(0, 60)) + 1;
        while (i_1--) {
            updateParticle(p);
        }
        PARTICLES.push(p);
    }
}
function updateTile(t) {
    t.vx -= GRAVITY;
    t.x += t.vx;
    t.y += t.vy;
    if (t.x + t.width < 0) {
        t.x = randomNumber(0, WIDTH) + WIDTH;
        t.vx = 0;
    }
}
function createTiles() {
    var tileCount = HEIGHT / 10;
    for (var i = tileCount; i > 0; --i) {
        var tileWidth = randomNumber(60, 120);
        var t = new Tile();
        t.opacity = randomNumber(0.1, 0.6);
        t.width = tileWidth;
        t.x = tileWidth * (i - 1);
        t.y = t.height * (i - 1);
        var ii = Math.floor(randomNumber(0, 260)) + 1;
        while (ii--) {
            updateTile(t);
        }
        TILES.push(t);
    }
}
function setup() {
    document.body.appendChild(CANVAS);
    var unicornX = WIDTH / 2 - UNICORN.image.width / 2;
    var unicornY = HEIGHT / 2 - UNICORN.image.height / 2;
    UNICORN.x = unicornX;
    UNICORN.y = unicornY;
    createTiles();
    createParticles();
}
function init() {
    setup();
    animation();
}
//#endregion

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    css

    body {
    background: linear-gradient(180deg, #FF7F0022, white, #9400D322);
    box-sizing: border-box;
    margin: 0;
    overflow: hidden;
    text-align: center;
}

.made-by {
    position: absolute;
    bottom: 16px;
    right: 16px;
    padding: 8px 16px;
    background: white;
    color: hotpink;
    font-family: monospace;
    font-size: 12px;
}

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    效果

    在这里插入图片描述

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  • 原文地址：https://blog.csdn.net/stqer/article/details/136597021