three+webgl实现三维彩色变色粒子喷射动画效果代码-html代码-BFW代码库

代码语言：html

所属分类：粒子

代码描述：three+webgl实现三维彩色变色粒子喷射动画效果代码

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 lang="en" >

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

  
  
  
<style>
body {
	margin: 0;
	overflow: hidden;
	cursor: move;
}
</style>

  
  
  
</head>

<body >
  <div id="three-container"></div>

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/three.72.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/OrbitControls.72.js"></script>
      <script >
var mContainer;
var mCamera, mRenderer;
var mControls;

var mScene;

var mParticleCount = 100000; // <-- change this number!
var mParticleSystem;

var mTime = 0.0;
var mTimeStep = 1 / 60;
var mDuration = 20;

window.onload = function () {
  init();
};

function init() {
  initTHREE();
  initControls();
  initParticleSystem();

  requestAnimationFrame(tick);
  window.addEventListener('resize', resize, false);
}

function initTHREE() {
  mRenderer = new THREE.WebGLRenderer({ antialias: true });
  mRenderer.setSize(window.innerWidth, window.innerHeight);

  mContainer = document.getElementById('three-container');
  mContainer.appendChild(mRenderer.domElement);

  mCamera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 0.1, 5000);
  mCamera.position.set(0, 600, 600);

  mScene = new THREE.Scene();

  var light;

  light = new THREE.PointLight(0xffffff, 4, 1000, 2);
  light.position.set(0, 400, 0);
  mScene.add(light);
}

function initControls() {
  mControls = new THREE.OrbitControls(mCamera, mRenderer.domElement);
}

function initParticleSystem() {
  var prefabGeometry = new THREE.PlaneGeometry(4, 4);
  var bufferGeometry = new THREE.BAS.PrefabBufferGeometry(prefabGeometry, mParticleCount);

  bufferGeometry.computeVertexNormals();

  // generate additional geometry data
  var aOffset = bufferGeometry.createAttribute('aOffset', 1);
  var aStartPosition = bufferGeometry.createAttribute('aStartPosition', 3);
  var aControlPoint1 = bufferGeometry.createAttribute('aControlPoint1', 3);
  var aControlPoint2 = bufferGeometry.createAttribute('aControlPoint2', 3);
  var aEndPosition = bufferGeometry.createAttribute('aEndPosition', 3);
  var aAxisAngle = bufferGeometry.createAttribute('aAxisAngle', 4);
  var aColor = bufferGeometry.createAttribute('color', 3);

  var i, j, offset;

  // buffer time offset
  var delay;

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    delay = i / mParticleCount * mDuration;

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aOffset.array[offset++] = delay;
    }
  }

  // buffer start positions
  var x, y, z;

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    x = -1000;
    y = 0;
    z = 0;

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aStartPosition.array[offset++] = x;
      aStartPosition.array[offset++] = y;
      aStartPosition.array[offset++] = z;
    }
  }

  // buffer control points

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    x = THREE.Math.randFloat(-400, 400);
    y = THREE.Math.randFloat(400, 600);
    z = THREE.Math.randFloat(-1200, -800);

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aControlPoint1.array[offset++] = x;
      aControlPoint1.array[offset++] = y;
      aControlPoint1.array[offset++] = z;
    }
  }

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    x = THREE.Math.randFloat(-400, 400);
    y = THREE.Math.randFloat(-600, -400);
    z = THREE.Math.randFloat(800, 1200);

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aControlPoint2.array[offset++] = x;
      aControlPoint2.array[offset++] = y;
      aControlPoint2.array[offset++] = z;
    }
  }

  // buffer end positions

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    x = 1000;
    y = 0;
    z = 0;

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aEndPosition.array[offset++] = x;
      aEndPosition.array[offset++] = y;
      aEndPosition.array[offset++] = z;
    }
  }

  // buffer axis angle
  var axis = new THREE.Vector3();
  var angle = 0;

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    axis.x = THREE.Math.randFloatSpread(2);
    axis.y = THREE.Math.randFloatSpread(2);
    axis.z = THREE.Math.randFloatSpread(2);
    axis.normalize();

    angle = Math.PI * THREE.Math.randInt(16, 32);

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aAxisAngle.array[offset++] = axis.x;
      aAxisAngle.array[offset++] = axis.y;
      aAxisAngle.array[offset++] = axis.z;
      aAxisAngle.array[offset++] = angle;
    }
  }

  // buffer color
  var color = new THREE.Color();
  var h, s, l;

  for (i = 0, offset = 0; i < mParticleCount; i++) {
    h = i / mParticleCount;
    s = THREE.Math.randFloat(0.4, 0.6);
    l = THREE.Math.randFloat(0.4, 0.6);

    color.setHSL(h, s, l);

    for (j = 0; j < prefabGeometry.vertices.length; j++) {
      aColor.array[offset++] = color.r;
      aColor.array[offset++] = color.g;
      aColor.array[offset++] = color.b;
    }
  }


  var material = new THREE.BAS.PhongAnimationMaterial(
  // custom parameters & THREE.MeshPhongMaterial parameters
  {
    vertexColors: THREE.VertexColors,
    shading: THREE.FlatShading,
    side: THREE.DoubleSide,
    uniforms: {
      uTime: { type: 'f', value: 0 },
      uDuration: { type: 'f', value: mDuration } },

    shaderFunctions: [
    THREE.BAS.ShaderChunk['quaternion_rotation'],
    THREE.BAS.ShaderChunk['cubic_bezier']],

    shaderParameters: [
    'uniform float uTime;',
    'uniform float uDuration;',
    'attribute float aOffset;',
    'attribute vec3 aStartPosition;',
    'attribute vec3 aControlPoint1;',
    'attribute vec3 aControlPoint2;',
    'attribute vec3 aEndPosition;',
    'attribute vec4 aAxisAngle;'],

    shaderVertexInit: [
    'float tProgress = mod((uTime + aOffset), uDuration) / uDuration;',

    'float angle = aAxisAngle.w * tProgress;',
    'vec4 tQuat = quatFromAxisAngle(aAxisAngle.xyz, angle);'],

    shaderTransformNormal: [
    'objectNormal = rotateVector(tQuat, objectNormal);'],

    shaderTransformPosition: [
    'transformed = rotateVector(tQuat, transformed);',
    'transformed += cubicBezier(aStartPosition, aControlPoint1, aControlPoint2, aEndPosition, tProgress);'] },


  // THREE.MeshPhongMaterial uniforms
  {
    specular: 0xff0000,
    shininess: 20 });



  mParticleSystem = new THREE.Mesh(bufferGeometry, material);
  // because the bounding box of the particle system does not reflect its on-screen size
  // set this to false to prevent the whole thing from disappearing on certain angles
  mParticleSystem.frustumCulled = false;

  mScene.add(mParticleSystem);
}

function tick() {
  update();
  render();

  mTime += mTimeStep;
  mTime %= mDuration;

  requestAnimationFrame(tick);
}

function update() {
  mControls.update();

  mParticleSystem.material.uniforms['uTime'].value = mTime;
}

function render() {
  mRenderer.render(mScene, mCamera);
}

function resize() {
  mCamera.aspect = window.innerWidth / window.innerHeight;
  mCamera.updateProjectionMatrix();

  mRenderer.setSize(window.innerWidth, window.innerHeight);
}


/////////////////////////////
// buffer animation system
/////////////////////////////

THREE.BAS = {};

THREE.BAS.ShaderChunk = {};

THREE.BAS.ShaderChunk["animation_time"] = "float tDelay = aAnimation.x;\nfloat tDuration = aAnimation.y;\nfloat tTime = clamp(uTime - tDelay, 0.0, tDuration);\nfloat tProgress = ease(tTime, 0.0, 1.0, tDuration);\n";

THREE.BAS.ShaderChunk["cubic_bezier"] = "vec3 cubicBezier(vec3 p0, vec3 c0, vec3 c1, vec3 p1, float t)\n{\n    vec3 tp;\n    float tn = 1.0 - t;\n\n    tp.xyz = tn * tn * tn * p0.xyz + 3.0 * tn * tn * t * c0.xyz + 3.0 * tn * t * t * c1.xyz + t * t * t * p1.xyz;\n\n    return tp;\n}\n";

THREE.BAS.ShaderChunk["ease_in_cubic"] = "float ease(float t, float b, float c, float d) {\n  return c*(t/=d)*t*t + b;\n}\n";

THREE.BAS.ShaderChunk["ease_in_quad"] = "float ease(float t, float b, float c, float d) {\n  return c*(t/=d)*t + b;\n}\n";

THREE.BAS.ShaderChunk["ease_out_cubic"] = "float ease(float t, float b, float c, float d) {\n  return c*((t=t/d - 1.0)*t*t + 1.0) + b;\n}\n";

THREE.BAS.ShaderChunk["quaternion_rotation"] = "vec3 rotateVector(vec4 q, vec3 v)\n{\n    return v + 2.0 * cross(q.xyz, cross(q.xyz, v) + q.w * v);\n}\n\nvec4 quatFromAxisAngle(vec3 axis, float angle)\n{\n    float halfAngle = angle * 0.5;\n    return vec4(axis.xyz * sin(halfAngle), cos(halfAngle));\n}\n";


THREE.BAS.PrefabBufferGeometry = function (prefab, count) {
  THREE.BufferGeometry.call(this);

  this.prefabGeometry = prefab;
  this.prefabCount = count;
  this.prefabVertexCount = prefab.vertices.length;

  this.bufferDefaults();
};
THREE.BAS.PrefabBufferGeometry.prototype = Object.create(THREE.BufferGeometry.prototype);
THREE.BAS.PrefabBufferGeometry.prototype.constructor = THREE.BAS.PrefabBufferGeometry;

THREE.BAS.PrefabBufferGeometry.prototype.bufferDefaults = function () {
  var prefabFaceCount = this.prefabGeometry.faces.length;
  var prefabIndexCount = this.prefabGeometry.faces.length * 3;
  var prefabVertexCount = this.prefabVertexCount = this.prefabGeometry.vertices.length;
  var prefabIndices = [];

  //console.log('prefabCount', this.prefabCount);
  //console.log('prefabFaceCount', prefabFaceCount);
  //console.log('prefabIndexCount', prefabIndexCount);
  //console.log('prefabVertexCount', prefabVertexCount);
  //console.log('triangles', prefabFaceCount * this.prefabCount);

  for (var h.........完整代码请登录后点击上方下载按钮下载查看