js实现canvas粒子随机运动鼠标悬浮放大动画效果代码-html代码-BFW代码库

js实现canvas粒子随机运动鼠标悬浮放大动画效果代码

代码语言：html

所属分类：粒子

代码描述：js实现canvas粒子随机运动鼠标悬浮放大动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!doctype html>
<html>

<head>
    <meta charset="utf-8">

    <style>
        * {
        	margin:0;
        	padding:0;
        }
        canvas {
        	background-color:#C3373E
        }
    </style>

</head>

<body>

    <canvas></canvas>

    <script>
        // WIP
        // COLOR BUG
        
        const c = document.querySelector('canvas');
        // creating c as a 'brush'
        let ctx = c.getContext('2d');
        /*  var image = new Image();
          
          image.onload = function() {
              console.log('Loaded image');
              // do somethingElse()
              ctx.drawImage(image, 0, 0, c.width, c.height);
             // works like CSS, apply styles before 
          }
          
          image.src = 'giphyHalloween.gif'; 
          // make canvas full screen
          c.width = window.innerWidth;
          c.height = window.innerHeight;
          ctx.fillStyle = 'blue'
          ctx.strokeStyle = 'red'
          ctx.font = '36pt Helvetica'
          ctx.textAlign = 'center'
          // x y width height
          ctx.fillRect(100, 100, 100, 100);
          ctx.strokeRect(50, 50, 50, 50);
          // beginPath for making a new shape
          ctx.beginPath();
          // moves drawing to the location, no drawing yet
          ctx.moveTo(125, 125);
          // draws it on this location
          ctx.lineTo(175, 175);
          // move it again etc / drawing
          ctx.lineTo(175, 125);
          // fill it in etc
          ctx.fill();
          ctx.stroke();
          // 50 10 position
          ctx.strokeText("hello", 150, 100)
          
          multiplies the x and y value by a given factor
          scale(x, y)
          ctx.scale(2, 3)
          movest all subsequent draw commands ny x hor, y vert
          translate(x,y)
          rotates an object a certain number of radians (from center)
          ctx.rotate()
          radians = degrees * (Math.PI/180)
          restore a state with
          ctx.restore()
          ctx.fillRect()
          */
        // make canvas full screen
        c.width = window.innerWidth;
        c.height = window.innerHeight;
        /*    for (let i = 0; i < 200; i++) {
            let x = Math.random() * window.innerWidth;
            let y = Math.random() * window.innerHeight;
            let num = Math.random() * 3
            // so you dont rotate the whole canvas
            ctx.save();
            ctx.translate(x,y);
            ctx.rotate(num);
            ctx.fillStyle = 'silver';
            ctx.fillRect(x, y, 10, 10);
            ctx.restore();
            }
            // lines
            for (let i = 0; i < 20; i++) {
            let x = Math.random() * 2;
            let y = Math.random() * 2;
            ctx.beginPath();
            ctx.moveTo(x, y);
            ctx.lineTo(x, y);
            ctx.lineTo(x, y);
            ctx.strokeStyle = 'white'
            ctx.stroke()
            }
            // arc
            // x y radius start angle end angle math * pi * 2 circle
            // seperate the prevoous drawing with
            
            
            // crreate multiple with for loops
            for (let i = 0; i < 200; i++) {
                // randomize x and y
                let x = Math.random() * window.innerWidth;
                let y = Math.random() * window.innerHeight;
                ctx.beginPath();
                // change x and y for each i
                ctx.arc(x, y, 4, 0, Math.PI * 2, false)
                // outline
                ctx.strokeStyle = 'white'
                ctx.stroke()
            }
            
             let x = Math.random() * innerWidth
             let y = Math.random() * innerHeight
             // get random num neg or pos
             let dx = (Math.random() - 0.5) * 8
             let dy = (Math.random() - 0.5) * 8
             let radius = 4
            */
        // creat object
        let initColor = 'white'
        let colors = [
            '#ffffff',
            '#C30021',
            '#50C339'
        ]
        let mouse = {
        .........完整代码请登录后点击上方下载按钮下载查看