这是 JavaScript 动画的核心部分。我们将定义粒子的配置并设置画布来绘制它们。
\\'use strict\\'; // Enables strict mode to enforce stricter parsing and error handling in JavaScript// Configuration object for particle systemconst config = { particleCount: 100, // Total number of particles in the system particlePropCount: 9, // Number of properties each particle has baseTTL: 1, // Base time-to-live for each particle (in seconds) rangeTTL: 2, // Range of time-to-live variation (in seconds) baseSpeed: 0.001, // Base speed of particle movement rangeSpeed: 0.002, // Variation in particle speed circularSpeed: 0.001, // Speed of particles\\' circular motion baseRadius: 2, // Minimum radius of particles rangeRadius: 3, // Maximum variation in particle radius baseHue: 220, // Base hue (color) of particles rangeHue: 120, // Variation in hue for particle colors backgroundColor: \\'#111827\\', // Color of the background circleRadius: 250, // Radius of the circular area in which particles move glowStrength: 10, // Strength of the glow effect around particles randomnessFactor: 4, // Factor to introduce randomness in particle behavior trailLength: 10.2, // Length of the trail left by particles mouseForce: 2, // Increased mouse attraction force to pull particles mouseRadius: 200 // Radius within which mouse influence affects particles};// Additional JavaScript code goes here...
在上面的代码中,我们为粒子配置了各种属性,包括它们的数量、速度、半径、颜色(色调)和画布的背景颜色。
我们以圆形图案初始化粒子并为它们分配随机属性:
function initParticles() { particleProps = new Float32Array(config.particleCount * config.particlePropCount); const angleIncrement = TAU / config.particleCount; for (let i = 0; i < config.particleCount; i ) { initParticle(i * config.particlePropCount, i * angleIncrement); }}function initParticle(i, angleOffset) { const radius = config.baseRadius rand(config.rangeRadius); const hue = config.baseHue rand(config.rangeHue); particleProps.set([ Math.cos(angleOffset) * config.circleRadius canvas.a.width / 2, Math.sin(angleOffset) * config.circleRadius canvas.a.height / 2, 0, 0, 0, config.baseTTL rand(config.rangeTTL), config.baseSpeed rand(config.rangeSpeed), radius, hue ], i);}
核心动画逻辑在绘制函数中处理,我们在其中不断更新和渲染粒子:
function draw() { tick ; ctx.a.clearRect(0, 0, canvas.a.width, canvas.a.height); ctx.b.fillStyle = config.backgroundColor; ctx.b.fillRect(0, 0, canvas.a.width, canvas.a.height); drawParticles(); renderGlow(); renderToScreen(); requestAnimationFrame(draw);}
为了确保我们的动画看起来优美,我们将使用一些 CSS 来设计主体和画布的样式:
body { display: flex; justify-content: center; align-items: center; height: 100vh; /* Full viewport height */ margin: 0; background: #000; /* Optional: background color */}.content--canvas { position: absolute; top: 0; z-index: 1; width: 100vw; /* Full viewport width */ height: 100vh; /* Full viewport height */}canvas { display: block; }
随意尝试配置对象中的粒子属性来创建您独特的动画!查看 CodePen 上的现场演示,并在下面的评论中分享您的想法或改进。
","image":"http://www.luping.net/uploads/20241006/17282059316702546b4a6a4.jpg","datePublished":"2024-11-08T19:41:54+08:00","dateModified":"2024-11-08T19:41:54+08:00","author":{"@type":"Person","name":"luping.net","url":"https://www.luping.net/articlelist/0_1.html"}}这就是我们要创建的,将鼠标移到粒子上即可查看效果。
在本文中,我将引导您完成使用 JavaScript 和 HTML5 画布创建迷人粒子动画的过程。该项目不仅增强了网页的美观性,而且还是深入研究一些有趣的编码概念的绝佳机会。让我们开始吧!
动画的特点是粒子围绕中心点以圆形图案移动。当鼠标悬停在画布上时,粒子会被吸引到光标上,从而创建动态且引人入胜的效果。我们将利用 Simplex Noise 库引入一些随机性,并使粒子的运动更加有机且更具视觉吸引力。
首先,创建一个 HTML 文件并使用以下脚本标记包含 Simplex Noise 库:
这是 JavaScript 动画的核心部分。我们将定义粒子的配置并设置画布来绘制它们。
'use strict'; // Enables strict mode to enforce stricter parsing and error handling in JavaScript // Configuration object for particle system const config = { particleCount: 100, // Total number of particles in the system particlePropCount: 9, // Number of properties each particle has baseTTL: 1, // Base time-to-live for each particle (in seconds) rangeTTL: 2, // Range of time-to-live variation (in seconds) baseSpeed: 0.001, // Base speed of particle movement rangeSpeed: 0.002, // Variation in particle speed circularSpeed: 0.001, // Speed of particles' circular motion baseRadius: 2, // Minimum radius of particles rangeRadius: 3, // Maximum variation in particle radius baseHue: 220, // Base hue (color) of particles rangeHue: 120, // Variation in hue for particle colors backgroundColor: '#111827', // Color of the background circleRadius: 250, // Radius of the circular area in which particles move glowStrength: 10, // Strength of the glow effect around particles randomnessFactor: 4, // Factor to introduce randomness in particle behavior trailLength: 10.2, // Length of the trail left by particles mouseForce: 2, // Increased mouse attraction force to pull particles mouseRadius: 200 // Radius within which mouse influence affects particles }; // Additional JavaScript code goes here...
在上面的代码中,我们为粒子配置了各种属性,包括它们的数量、速度、半径、颜色(色调)和画布的背景颜色。
我们以圆形图案初始化粒子并为它们分配随机属性:
function initParticles() { particleProps = new Float32Array(config.particleCount * config.particlePropCount); const angleIncrement = TAU / config.particleCount; for (let i = 0; i绘制粒子
核心动画逻辑在绘制函数中处理,我们在其中不断更新和渲染粒子:
function draw() { tick ; ctx.a.clearRect(0, 0, canvas.a.width, canvas.a.height); ctx.b.fillStyle = config.backgroundColor; ctx.b.fillRect(0, 0, canvas.a.width, canvas.a.height); drawParticles(); renderGlow(); renderToScreen(); requestAnimationFrame(draw); }CSS 样式
为了确保我们的动画看起来优美,我们将使用一些 CSS 来设计主体和画布的样式:
body { display: flex; justify-content: center; align-items: center; height: 100vh; /* Full viewport height */ margin: 0; background: #000; /* Optional: background color */ } .content--canvas { position: absolute; top: 0; z-index: 1; width: 100vw; /* Full viewport width */ height: 100vh; /* Full viewport height */ } canvas { display: block; }随意尝试配置对象中的粒子属性来创建您独特的动画!查看 CodePen 上的现场演示,并在下面的评论中分享您的想法或改进。
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