JS特效第151弹：HTML5制作ascii码表文字特效_用html做nike鞋码表

作者：代码探险家 | 2024-07-23 18:02:34

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用html做nike鞋码表

HTML5制作ascii码表文字特效是一款基于HTML5 Canvas绘制的科技酷炫的文字3D旋转特效，先来看看效果：

一部分关键的代码如下：


<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>HTML5制作ascii码表文字特效</title>
 
<style>
body {
  overflow: hidden;
  background-color: #000;
}
 
canvas {
  width: 100%;
  height: 100vh;
}
</style>
 
</head>
<body>
 
<canvas></canvas><script>
window.onload = () => {
	const CANVAS = document.getElementsByTagName("canvas")[0];
	const CTX = CANVAS.getContext("2d");
	const CHARS = [];
	const MAX_CHARS = 200;
	const SEPARATION = 1.5;
 
	let ww, wh, camera;
 
	class Vector {
		constructor(x, y, z) {
			this.x = x;
			this.y = y;
			this.z = z;
		}
 
		rotate(dir, ang) {
			const X = this.x;
			const Y = this.y;
			const Z = this.z;
 
			const SIN = Math.sin(ang);
			const COS = Math.cos(ang);
 
			if (dir === "x") {
				this.y = Y * COS - Z * SIN;
				this.z = Y * SIN + Z * COS;
			} else if (dir === "y") {
				this.x = X * COS - Z * SIN;
				this.z = X * SIN + Z * COS;
			}
		}
 
		project() {
			const ZP = this.z + camera.z;
			const DIV = ZP / 600;
			const XP = (this.x + camera.x) / DIV;
			const YP = (this.y + camera.y) / DIV;
			const CENTER = getCenter();
			return [XP + CENTER[0], YP + CENTER[1], ZP];
		}
	}
 
	class Char {
		constructor(letter, pos) {
			this.letter = letter;
			this.pos = pos;
		}
 
		rotate(dir, ang) {
			this.pos.rotate(dir, ang);
		}
 
		render() {
			const PIXEL = this.pos.project();
			const XP = PIXEL[0];
			const YP = PIXEL[1];
			const MAX_SIZE = 50;
			const SIZE = (1 / PIXEL[2] * MAX_SIZE) | 0;
			const BRIGHTNESS = SIZE / MAX_SIZE;
			const COL = `rgba(255, 255, ${100 * BRIGHTNESS | 0 + 150}, ${BRIGHTNESS})`;
			
			CTX.beginPath();
			CTX.fillStyle = COL;
			CTX.font = SIZE + "px monospace";
			CTX.fillText(this.letter, XP, YP);
			CTX.fill();
			CTX.closePath();
		}
	}
 
	function getCenter() {
		return [ww / 2, wh / 2];
	}
 
	function signedRandom() {
		return Math.random() - Math.random();
	}
 
	function render() {
		for (let i = 0; i < CHARS.length; i++) {
			CHARS[i].render();
		}
	}
	
	let time = 0;
	function update() {
		CTX.clearRect(0, 0, ww, wh);
		for (let i = 0; i < CHARS.length; i++) {
			const DX = 0.005 * Math.sin(time * 0.001);
			const DY = 0.005 * Math.cos(time * 0.001);
			CHARS[i].rotate("x", DX);
			CHARS[i].rotate("y", DY);
		}
		++time;
	}
 
	function loop() {
		window.requestAnimationFrame(loop);
		update();
		render();
	}
	
	function getRandomInt(min, max) {
		return Math.floor(Math.random() * (max - min + 1)) + min;
	};
 
	function createChars() {
		for (let i = 0; i < MAX_CHARS; i++) {
			const CHARACTER = String.fromCharCode((Math.random() * 93 + 34) | 0);
			const X = signedRandom() * SEPARATION;
			const Y = signedRandom() * SEPARATION;
			const Z = signedRandom() * SEPARATION;
			const POS = new Vector(X, Y, Z);
			const CHAR = new Char(CHARACTER, POS);
			CHARS.push(CHAR);
		}
	}
 
	function setDim() {
		ww = window.innerWidth;
		wh = window.innerHeight;
		CANVAS.width = ww;
		CANVAS.height = wh;
	}
 
	function initCamera() {
		camera = new Vector(0, 0, SEPARATION + 1);
	}
 
	window.onresize = setDim;
 
	(() => {
		setDim();
		initCamera();
		createChars();
		loop();
	})();
};
</script>
 
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
<p>适用浏览器：360、FireFox、Chrome、Opera、傲游、搜狗、世界之窗. 不支持Safari、IE8及以下浏览器。</p>
</div>
</body>
</html>

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