利用Three.js实现3D三棱锥立体特效

目录

• 演示
• 技术栈
• 源码
• css部分
• js部分

演示

技术栈

3D特效的话最容易让人想到的应该是three.js吧。我们今天来说说它。

Three.js是基于原生WebGL封装运行的三维引擎，在所有WebGL引擎中，Three.js是国内文资料最多、使用最广泛的三维引擎。

Threejs是一款WebGL三维引擎，它可以用来做什么许多许多地场景应用

一个小案例

源码

css部分

body{
  overflow: hidden;
  margin:0;
}
canvas{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height:100%;
}

js部分

var w = window.innerWidth, h = window.innerHeight;
window.onresize = function(){
  var w = window.innerWidth, h = window.innerHeight;
  camera.aspect = w / h;
  camera.updateProjectionMatrix();
  renderer.setSize( w, h );
}

cameraSpeed = .0003;
lightSpeed = .001;
tubularSegments = 1000;
radialSegments = 3;
tubeRadius = 2;
lightColor = 0xffffff;
lightIntensity = 1;
lightDistance = 20;

var renderer = new THREE.WebGLRenderer({
  canvas: document.querySelector("canvas"),
  antialias: true,
});
renderer.setSize(w, h);

var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(60, w / h, .001, 1000);

var starsGeometry = new THREE.Geometry();
for(i=0; i<3000; i++){
	var star = new THREE.Vector3();
	star.x = THREE.Math.randFloatSpread(1500);
	star.y = THREE.Math.randFloatSpread(1500);
	star.z = THREE.Math.randFloatSpread(1500);
	starsGeometry.vertices.push(star);
}
var starsMaterial = new THREE.PointsMaterial({color: 0xffffff});
var starField = new THREE.Points(starsGeometry,starsMaterial);
scene.add(starField);

for (i=0; i 
 

p = [
	[389,246,0],
  [410,255,20],
  [413,268,7],
  [431,261,12],
  [418,244,30],
  [416,217,25],
  [420,205,8],
  [427,227,-20],
  [432,236,5],
  [444,228,12],
  [451,232,41],
  [446,246,72],
  [443,264,96],
  [446,278,65],
  [463,267,20],
  [460,258,-10],
  [464,243,-20],
  [459,233,0],
  [475,225,22],
  [484,225,29],
  [490,214,51],
  [476,202,55],
  [462,202,55],
  [446,205,42],
  [440,192,42],
  [430,183,72],
  [413,184,58],
  [406,191,32],
  [406,207,0],
  [402,220,0],
  [390,222,20],
  [385,228,10],
  [389,246,0]
];

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