HTML+CSS+JS实现 ❤️酷炫3D瀑布流动画特效❤️

Posted 2021-09-26 java李阳勇

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效果演示： 文末获取源码 

代码目录：

主要代码实现：

CSS样式：

 body {
            background: #222;
            color: white;
            overflow: hidden;
        }

        #container {
            box-shadow: inset 0 1px 0 #444, 0 -1px 0 #000;
            height: 100vh;
            width: 100vw;
            position: absolute;
            left: 0;
            top: 0;
            margin: 0;
            will-change: transform;
            -webkit-transform: translateZ(0);
            transform: translateZ(0);
        }

        canvas#waterfall {
            display: block;
            margin: 0 auto;
            width: 30%;
            height: 55%;
            will-change: transform;
            -webkit-transform: translateZ(0);
            transform: translateZ(0);
        }

        .emma {
            height: 100vh;
            width: 100%;
            position: absolute;
            left: 0;
            top: 0;
            margin: 0;
        }

        h1 {
            color: #0af;
            font-size: 30vw;
        }

        canvas#surface {
            -webkit-animation: fade-in 3000ms forwards;
            animation: fade-in 3000ms forwards;
            display: block;
            left: 0;
            position: absolute;
            top: 0;
            z-index: -1;
        }

        @-webkit-keyframes fade-in {
            0% {
                opacity: 0;
            }
            100% {
                opacity: 1;
            }
        }

        @keyframes fade-in {
            0% {
                opacity: 0;
            }
            100% {
                opacity: 1;
            }
        }

JS代码 :

   +!~-(function(PIXI, window, document, undefined) {
            var waterfallCanvas = function(c, cw, ch) {
                var _this = this;
                this.c = c;
                this.ctx = c.getContext('2d');
                this.cw = cw;
                this.ch = ch;
                this.particles = [];
                this.particleRate = 6;
                this.gravity = 0.15;
                this.init = function() {
                    this.loop();
                };
                this.reset = function() {
                    this.ctx.clearRect(0, 0, this.cw, this.ch);
                    this.particles = [];
                };
                this.rand = function(rMi, rMa) {
                    return ~~((Math.random() * (rMa - rMi + 1)) + rMi);
                };
                this.Particle = function() {
                    var newWidth = _this.rand(1, 20);
                    var newHeight = _this.rand(1, 45);
                    this.x = _this.rand(10 + (newWidth / 2), _this.cw - 10 - (newWidth / 2));
                    this.y = -newHeight;
                    this.vx = 0;
                    this.vy = 0;
                    this.width = newWidth;
                    this.height = newHeight;
                    this.hue = _this.rand(200, 220);
                    this.saturation = _this.rand(30, 60);
                    this.lightness = _this.rand(30, 60);
                };
                this.Particle.prototype.update = function(i) {
                    this.vx += this.vx;
                    this.vy += _this.gravity;
                    this.x += this.vx;
                    this.y += this.vy;
                };
                this.Particle.prototype.render = function() {
                    _this.ctx.strokeStyle = 'hsla(' + this.hue + ', ' + this.saturation + '%, ' + this.lightness + '%, .05)';
                    _this.ctx.beginPath();
                    _this.ctx.moveTo(this.x, this.y);
                    _this.ctx.lineTo(this.x, this.y + this.height);
                    _this.ctx.lineWidth = this.width / 2;
                    _this.ctx.lineCap = 'round';
                    _this.ctx.stroke();
                };
                this.Particle.prototype.renderBubble = function() {
                    _this.ctx.fillStyle = 'hsla(' + this.hue + ', 40%, 40%, 1)';
                    _this.ctx.fillStyle = 'hsla(' + this.hue + ', ' + this.saturation + '%, ' + this.lightness + '%, .3)';
                    _this.ctx.beginPath();
                    _this.ctx.arc(this.x + this.width / 2, _this.ch - 20 - _this.rand(0, 10), _this.rand(1, 8), 0, Math.PI * 2, false);
                    _this.ctx.fill();
                };
                this.createParticles = function() {
                    var i = this.particleRate;
                    while (i--) {
                        this.particles.push(new this.Particle());
                    }
                };
                this.removeParticles = function() {
                    var i = this.particleRate;
                    while (i--) {
                        var p = this.particles[i];
                        if (p.y > _this.ch - 20 - p.height) {
                            p.renderBubble();
                            _this.particles.splice(i, 1);
                        }
                    }
                };
                this.updateParticles = function() {
                    var i = this.particles.length;
                    while (i--) {
                        var p = this.particles[i];
                        p.update(i);
                    }
                };
                this.renderParticles = function() {
                    var i = this.particles.length;
                    while (i--) {
                        var p = this.particles[i];
                        p.render();
                    }
                };
                this.clearCanvas = function() {
                    this.ctx.globalCompositeOperation = 'destination-out';
                    this.ctx.fillStyle = 'rgba(255,255,255,.06)';
                    this.ctx.fillRect(0, 0, this.cw, this.ch);
                    this.ctx.globalCompositeOperation = 'lighter';
                };
                this.loop = function() {
                    var loopIt = function() {
                        requestAnimationFrame(loopIt, _this.c);
                        _this.clearCanvas();
                        _this.createParticles();
                        _this.updateParticles();
                        _this.renderParticles();
                        _this.removeParticles();
                    };
                    loopIt();
                };
            };
            var isCanvasSupported = function() {
                var elem = document.createElement('canvas');
                return !!(elem.getContext && elem.getContext('2d'));
            };
            var setupRAF = function() {
                var lastTime = 0;
                var vendors = ['ms', 'moz', 'webkit', 'o'];
                for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
                    window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
                    window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];
                }
                if (!window.requestAnimationFrame) {
                    window.requestAnimationFrame = function(callback, element) {
                        var currTime = new Date().getTime();
                        var timeToCall = Math.max(0, 16 - (currTime - lastTime));
                        var id = window.setTimeout(function() {
                            callback(currTime + timeToCall);
                        }, timeToCall);
                        lastTime = currTime + timeToCall;
                        return id;
                    };
                }
                if (!window.cancelAnimationFrame) {
                    window.cancelAnimationFrame = function(id) {
                        clearTimeout(id);
                    };
                }
            };
            if (isCanvasSupported()) {
                var c = document.getElementById('waterfall');
                var cw = c.width = Math.max(document.getElementById('waterfall').scrollWidth, document.getElementById('waterfall').offsetWidth, document.getElementById('waterfall').clientWidth, document.getElementById('waterfall').scrollWidth, document.getElementById('waterfall').offsetWidth);
                var ch = c.height = Math.max(document.getElementById('waterfall').scrollHeight, document.getElementById('waterfall').offsetHeight, document.getElementById('waterfall').clientHeight, document.getElementById('waterfall').scrollHeight, document.getElementById('waterfall').offsetHeight);
                var waterfall = new waterfallCanvas(c, cw, ch);
                setupRAF();
                waterfall.init();
            } /* Second plugin */
            var w, h, renderer, stage, waveGraphics, partGraphics, waveTexture, partTexture, waveCount, partCount, waves, parts;

            function init() {
                renderer = PIXI.autoDetectRenderer(window.innerWidth, window.innerHeight / 2, {
                    backgroundColor: '0x' + tinycolor('hsl(200, 50%, 10%)').toHex()
                });
                stage = new PIXI.Container();
                waveCount = 2000;
                partCount = 1000;
                waves = [];
                parts = [];
                document.body.appendChild(renderer.view);
                reset();
                for (var i = 0; i < 300; i++) {
                    step();
                }
                loop();
            }

上面的其他文件需要引入

源码获取

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