使用jQuery怎么实现一个动态粒子效果

2023-06-14 05:06:07 465人浏览泡泡鱼

摘要

使用Jquery怎么实现一个动态粒子效果？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。<!DOCTYPE html><html lan

使用Jquery怎么实现一个动态粒子效果？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <meta Http-equiv="X-UA-Compatible" content="IE=edge">  <meta name="viewport" content="width=device-width, initial-scale=1.0">  <title>Document</title>  <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>  <div id="jsi-particle-container" class="container"></div>  <style>    html,    body {      width: 100%;      height: 100%;      margin: 0;      padding: 0;      overflow: hidden;    }        .container {      width: 100％;      height: 100%;      margin: 0;      padding: 0;      background-color: #000000;    }  </style></head><body>  <script>    var RENDERER = {      PARTICLE_COUNT: 1000,      PARTICLE_RADIUS: 1,      MAX_ROTATioN_ANGLE: Math.PI / 60,      TRANSLATION_COUNT: 500,      init: function(strategy) {        this.setParameters(strategy);        this.createParticles();        this.setupFigure();        this.reconstructMethod();        this.bindEvent();        this.drawFigure();      },      setParameters: function(strategy) {        this.$window = $(window);        this.$container = $('#jsi-particle-container');        this.width = this.$container.width();        this.height = this.$container.height();        this.$canvas = $('<canvas />').attr({          width: this.width,          height: this.height        }).appendTo(this.$container);        this.context = this.$canvas.get(0).getContext('2d');        this.center = {          x: this.width / 2,          y: this.height / 2        };        this.rotationX = this.MAX_ROTATION_ANGLE;        this.rotationY = this.MAX_ROTATION_ANGLE;        this.strategyIndex = 0;        this.translationCount = 0;        this.theta = 0;        this.strategies = strategy.getStrategies();        this.particles = [];      },      createParticles: function() {        for (var i = 0; i < this.PARTICLE_COUNT; i++) {          this.particles.push(new PARTICLE(this.center));        }      },      reconstructMethod: function() {        this.setupFigure = this.setupFigure.bind(this);        this.drawFigure = this.drawFigure.bind(this);        this.changeAngle = this.changeAngle.bind(this);      },      bindEvent: function() {        this.$container.on('click', this.setupFigure);        this.$container.on('mousemove', this.changeAngle);      },      changeAngle: function(event) {        var offset = this.$container.offset(),          x = event.clientX - offset.left + this.$window.scrollLeft(),          y = event.clientY - offset.top + this.$window.scrollTop();        this.rotationX = (this.center.y - y) / this.center.y * this.MAX_ROTATION_ANGLE;        this.rotationY = (this.center.x - x) / this.center.x * this.MAX_ROTATION_ANGLE;      },      setupFigure: function() {        for (var i = 0, length = this.particles.length; i < length; i++) {          this.particles[i].setAxis(this.strategies[this.strategyIndex]());        }        if (++this.strategyIndex == this.strategies.length) {          this.strategyIndex = 0;        }        this.translationCount = 0;      },      drawFigure: function() {        requestAnimationFrame(this.drawFigure);        this.context.fillStyle = 'rgba(0, 0, 0, 0.2)';        this.context.fillRect(0, 0, this.width, this.height);        for (var i = 0, length = this.particles.length; i < length; i++) {          var axis = this.particles[i].getAxis2D(this.theta);          this.context.beginPath();          this.context.fillStyle = axis.color;          this.context.arc(axis.x, axis.y, this.PARTICLE_RADIUS, 0, Math.PI * 2, false);          this.context.fill();        }        this.theta++;        this.theta %= 360;        for (var i = 0, length = this.particles.length; i < length; i++) {          this.particles[i].rotateX(this.rotationX);          this.particles[i].rotateY(this.rotationY);        }        this.translationCount++;        this.translationCount %= this.TRANSLATION_COUNT;        if (this.translationCount == 0) {          this.setupFigure();        }      }    };    var STRATEGY = {      SCATTER_RADIUS: 150,      CONE_ASPECT_RATIO: 1.5,      RING_COUNT: 5,      getStrategies: function() {        var strategies = [];        for (var i in this) {          if (this[i] == arguments.callee || typeof this[i] != 'function') {            continue;          }          strategies.push(this[i].bind(this));        }        return strategies;      },      createSphere: function() {        var cosTheta = Math.random() * 2 - 1,          sinTheta = Math.sqrt(1 - cosTheta * cosTheta),          phi = Math.random() * 2 * Math.PI;        return {          x: this.SCATTER_RADIUS * sinTheta * Math.cos(phi),          y: this.SCATTER_RADIUS * sinTheta * Math.sin(phi),          z: this.SCATTER_RADIUS * cosTheta,          hue: Math.round(phi / Math.PI * 30)        };      },      createTorus: function() {        var theta = Math.random() * Math.PI * 2,          x = this.SCATTER_RADIUS + this.SCATTER_RADIUS / 6 * Math.cos(theta),          y = this.SCATTER_RADIUS / 6 * Math.sin(theta),          phi = Math.random() * Math.PI * 2;        return {          x: x * Math.cos(phi),          y: y,          z: x * Math.sin(phi),          hue: Math.round(phi / Math.PI * 30)        };      },      createCone: function() {        var status = Math.random() > 1 / 3,          x,          y,          phi = Math.random() * Math.PI * 2,          rate = Math.tan(30 / 180 * Math.PI) / this.CONE_ASPECT_RATIO;        if (status) {          y = this.SCATTER_RADIUS * (1 - Math.random() * 2);          x = (this.SCATTER_RADIUS - y) * rate;        } else {          y = -this.SCATTER_RADIUS;          x = this.SCATTER_RADIUS * 2 * rate * Math.random();        }        return {          x: x * Math.cos(phi),          y: y,          z: x * Math.sin(phi),          hue: Math.round(phi / Math.PI * 30)        };      },      createVase: function() {        var theta = Math.random() * Math.PI,          x = Math.abs(this.SCATTER_RADIUS * Math.cos(theta) / 2) + this.SCATTER_RADIUS / 8,          y = this.SCATTER_RADIUS * Math.cos(theta) * 1.2,          phi = Math.random() * Math.PI * 2;        return {          x: x * Math.cos(phi),          y: y,          z: x * Math.sin(phi),          hue: Math.round(phi / Math.PI * 30)        };      }    };    var PARTICLE = function(center) {      this.center = center;      this.init();    };    PARTICLE.prototype = {      spring: 0.01,      FRICTION: 0.9,      FOCUS_POSITION: 300,      COLOR: 'hsl(%hue, 100%, 70%)',      init: function() {        this.x = 0;        this.y = 0;        this.z = 0;        this.vx = 0;        this.vy = 0;        this.vz = 0;        this.color;      },      setAxis: function(axis) {        this.translating = true;        this.nextX = axis.x;        this.nextY = axis.y;        this.nextZ = axis.z;        this.hue = axis.hue;      },      rotateX: function(angle) {        var sin = Math.sin(angle),          cos = Math.cos(angle),          nextY = this.nextY * cos - this.nextZ * sin,          nextZ = this.nextZ * cos + this.nextY * sin,          y = this.y * cos - this.z * sin,          z = this.z * cos + this.y * sin;        this.nextY = nextY;        this.nextZ = nextZ;        this.y = y;        this.z = z;      },      rotateY: function(angle) {        var sin = Math.sin(angle),          cos = Math.cos(angle),          nextX = this.nextX * cos - this.nextZ * sin,          nextZ = this.nextZ * cos + this.nextX * sin,          x = this.x * cos - this.z * sin,          z = this.z * cos + this.x * sin;        this.nextX = nextX;        this.nextZ = nextZ;        this.x = x;        this.z = z;      },      rotateZ: function(angle) {        var sin = Math.sin(angle),          cos = Math.cos(angle),          nextX = this.nextX * cos - this.nextY * sin,          nextY = this.nextY * cos + this.nextX * sin,          x = this.x * cos - this.y * sin,          y = this.y * cos + this.x * sin;        this.nextX = nextX;        this.nextY = nextY;        this.x = x;        this.y = y;      },      getAxis3D: function() {        this.vx += (this.nextX - this.x) * this.SPRING;        this.vy += (this.nextY - this.y) * this.SPRING;        this.vz += (this.nextZ - this.z) * this.SPRING;        this.vx *= this.FRICTION;        this.vy *= this.FRICTION;        this.vz *= this.FRICTION;        this.x += this.vx;        this.y += this.vy;        this.z += this.vz;        return {          x: this.x,          y: this.y,          z: this.z        };      },      getAxis2D: function(theta) {        var axis = this.getAxis3D(),          scale = this.FOCUS_POSITION / (this.FOCUS_POSITION + axis.z);        return {          x: this.center.x + axis.x * scale,          y: this.center.y - axis.y * scale,          color: this.COLOR.replace('%hue', this.hue + theta)        };      }    };    $(function() {      RENDERER.init(STRATEGY);    });  </script></body></html>